REV 1.1.6 1/30/03

Characteristics subject to change without notice.

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X9118

Single Digitally-Controlled (XDCP

) Potentiometer

FEATURES

· 1024 Resistor Taps 10-Bit Resolution
· 2-Wire Serial Interface for write, read, and trans-

fer operations of the potentiometer

· Wiper Resistance, 40

Typical @ 5V

· Four Non-Volatile Data Registers for Each

Potentiometer

· Non-Volatile Storage of Multiple Wiper Positions
· Power On Recall. Loads Saved Wiper Position on

Power Up.

· Standby Current < 3

A Max

· System V

- 2.7V to 5.5V Operation

· Analog V+/V-:

-5V to +5V

· 100K

End to End Resistance

· Endurance: 100, 000 Data changes per bit per

register

· 100 yr. Data Retention
· 14-Lead TSSOP, 15-Lead CSP (Chip Scale Pack-

age). Call factory for CSP availability

· Low power CMOS

DESCRIPTION

The X9118 integrates a single digitally controlled
potentiometer (XDCP) on a monolithic CMOS
integrated circuit.

The digital controlled potentiometer is implemented
using 1023 resistive elements in a series array.
Between each element are tap points connected to the
wiper terminal through switches. The position of the
wiper on the array is controlled by the user through the
2-wire bus interface. The potentiometer has associated
with it a volatile Wiper Counter Register (WCR) and a
four non-volatile Data Registers that can be directly
written to and read by the user. The contents of the
WCR controls the position of the wiper on the resistor
array though the switches. Powerup recalls the
contents of the default data register (DR0) to the WCR.

The XDCP can be used as a three-terminal
potentiometer or as a two terminal variable resistor in
a wide variety of applications including control,
parameter adjustments, and signal processing.

Dual Supply / Low Power / 1024-tap / 2-Wire bus

PPLICATION

OTES

AND

EVELOPMENT

YSTEM

A V A I L A B L E

AN99 · AN115 · AN124 ·AN133 · AN134 · AN135

FUNCTIONAL DIAGRAM

Bus

Interface &

Control

POT

2-Wire

Bus

Address

Data

Status

Write
Read

Wiper

1024-taps

Transfer

100K

Power On Recall

Wiper Counter

Data Registers

(DR0-DR3)

Control

Interface

V+

V-

Preliminary Information

X9118

 Preliminary Information

Characteristics subject to change without notice.

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CIRCUIT LEVEL APPLICATIONS

· Vary the gain of a voltage amplifier
· Provide programmable dc reference voltages for

comparators and detectors

· Control the volume in audio circuits
· Trim out the offset voltage error in a voltage amplifier

circuit

· Set the output voltage of a voltage regulator
· Trim the resistance in Wheatstone bridge circuits
· Control the gain, characteristic frequency and

Q-factor in filter circuits

· Set the scale factor and zero point in sensor signal

conditioning circuits

· Vary the frequency and duty cycle of timer ICs
· Vary the dc biasing of a pin diode attenuator in RF

circuits

· Provide a control variable (I, V, or R) in feedback

circuits

SYSTEM LEVEL APPLICATIONS

· Adjust the contrast in LCD displays
· Control the power level of LED transmitters in

communication systems

· Set and regulate the DC biasing point in an RF

power amplifier in wireless systems

· Control the gain in audio and home entertainment

systems

· Provide the variable DC bias for tuners in RF

wireless systems

· Set the operating points in temperature control

systems

· Control the operating point for sensors in industrial

systems

· Trim offset and gain errors in artificial intelligent

systems

DETAILED FUNCTIONAL DIAGRAM

SCL

SDA

Interface

and

Control

Circuitry

V+

DR0

DR1

DR2 DR3

Wiper

Counter

(WCR)

Data

1024-taps

100K

Control

Power On

Recall

X9118

 Preliminary Information

Characteristics subject to change without notice.

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PIN CONFIGURATION

PIN ASSIGNMENTS

Pin

(TSSOP)

Pin

(CSP) Symbol

Function

V+

Analog Supply Voltage

No Connect

Device Address for 2-wire bus

SCL

Serial Clock for 2-wire bus

Hardware Write Protect

SDA

Serial Data Input/Output for 2-wire bus

System Ground

Analog Supply Voltage

Device Address for 2-wire bus

No Connect

Wiper terminal of the Potentiometer

High terminal of the Potentiometer

Low terminal of the Potentiometer

System Supply Voltage

2
3

4
5

6
7

13
12

11
10

SCL

TSSOP

X9118

CSP

V+

SDA

X9118

V-

Call Factory for

CSP Availability

X9118 Preliminary Information

Characteristics subject to change without notice.

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PIN DESCRIPTIONS

Bus Interface Pins

ERIAL

ATA

NPUT

UTPUT

(SDA)

The SDA is a bidirectional serial data input/output pin
for a 2-wire slave device and is used to transfer data
into and out of the device. It receives device address,
opcode, wiper register address and data sent from an
2-wire master at the rising edge of the serial clock
SCL, and it shifts out data after each falling edge of the
serial clock SCL.

It is an open drain output and may be wire-ORed with
any number of open drain or open collector outputs. An
open drain output requires the use of a pull-up resistor.
For selecting typical values, refer to the guidelines for
calculating typical values on the bus pull-up resistors
graph.

ERIAL

LOCK

(SCL)

This input is used by 2-wire master to supply 2-wire
serial clock to the X9118.

EVICE

DDRESS

(A1A0

)

The address inputs are used to set the least significant
2 bits of the 8-bit slave address. A match in the slave
address serial data stream must be made with the
Address input in order to initiate communication with
the X9118. A maximum of 4 XDCP devices may
occupy the 2-wire serial bus.

ARDWARE

RITE

ROTECT

NPUT

(WP)

The WP pin when LOW prevents nonvolatile writes to
the Data Registers.

Potentiometer Pins

, R

The R

and R

pins are equivalent to the terminal

connections on a mechanical potentiometer.

The wiper pin is equivalent to the wiper terminal of a
mechanical potentiometer.

Bias Supply Pins

YSTEM

UPPLY

OLTAGE

)

AND

UPPLY

ROUND

)

The V

pin is the system or digital supply voltage.

The V

pin is the system ground.

NALOG

UPPLY

OLTAGES

(V+

AND

)

These supplies are the analog voltage supplies for the
potentiometer. The V+ supply is tied to the wiper
switches while the V- supply is used to bias the
switches and the internal P+ substrate of the integrated
circuit. Both of these supplies set the voltage limits of
the potentiometer.

Other Pins

ONNECT

No connect pins should be left open. These pins are
used for Xicor manufacturing and testing purposes.

PRINCIPLES OF OPERATION

The X9118 is an integrated microcircuit incorporating a
resistor array and their its registers and counters and
the serial interface logic providing direct
communication between the host and the digitally
controlled potentiometer. This section provides detail
description of the following:

 Resistor Array Description

 Serial Interface Description

 Instruction and Register Description

Resistor Array Description

The X9118 is comprised of a resistor array. The array
contains 1023, in effect, discrete resistive segments
that are connected in series (see Figure 1). The
physical ends of each array are equivalent to the fixed
terminals of a mechanical potentiometer (R

and R

inputs).

At both ends of each array and between each resistor
segment is a CMOS switch (transmission gate)
connected to the wiper (R

) output. Within each

individual array only one switch may be turned on at a
time. These switches are controlled by the Wiper
Counter Register (WCR). The 10-bits of the WCR
(WCR[9:0]) are decoded to select, and enable, one of
1024 switches.

The WCR may be written directly. The Data Registers
and the WCR can be read and written by the host
system.

X9118 Preliminary Information

Characteristics subject to change without notice.

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Figure 1. Detailed Potentiometer Block Diagram

Serial Data Path

From Interface

Serial
Bus
Input

Parallel

Bus
Input

Counter

C
O
U
N
T
E
R

D
E
C
O
D
E

If WCR = 000[HEX] then R

= R

WCR = 3FF[HEX]

then

Wiper

(WCR)

(DR0)

Circuitry

(DR1)

(DR2)

(DR3)

Serial Interface Description

ERIAL

NTERFACE

 2-W

IRE

The X9118 supports a bidirectional bus oriented
protocol. The protocol defines any device that sends
data onto the bus as a transmitter and the receiving
device as the receiver. The device controlling the
transfer is a master and the device being controlled is
the slave. The master will always initiate data transfers
and provide the clock for both transmit and receive
operations. Therefore, the X9118 will be considered a
slave device in all applications.

LOCK

AND

ATA

ONVENTIONS

Data states on the SDA line can change only during
SCL LOW periods. SDA state changes during SCL
HIGH are reserved for indicating start and stop
conditions. See Figure 3.

TART

ONDITION

All commands to the X9118 are preceded by the start
condition, which is a HIGH to LOW transition of SDA
while SCL is HIGH. The X9118 continuously monitors
the SDA and SCL lines for the start condition and will
not respond to any command until this condition is met.
See Figure 3.

TOP

ONDITION

All communications must be terminated by a stop
condition, which is a LOW to HIGH transition of SDA
while SCL is HIGH. See Figure 3.

CKNOWLEDGE

Acknowledge is a software convention used to provide
a positive handshake between the master and slave
devices on the bus to indicate the successful receipt of
data. The transmitting device, either the master or the
slave, will release the SDA bus after transmitting eight
bits. The master generates a ninth clock cycle and
during this period the receiver pulls the SDA line LOW
to acknowledge that it successfully received the eight
bits of data.

The X9118 will respond with an acknowledge after
recognition of a start condition and its slave address
and once again after successful receipt of the
command byte. If the command is followed by a data
byte the X9118 will respond with a final acknowledge.
See Figure 2.

X9118 Preliminary Information

Characteristics subject to change without notice.

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Figure 2. Acknowledge Response from Receiver

START

ACKNOWLEDGE

SCL from

Master

Data Output

from Transmitter

Data Output

from Receiver

CKNOWLEDGE

OLLING

The disabling of the inputs, during the internal
nonvolatile write operation, can be used to take
advantage of the typical 5ms EEPROM write cycle
time. Once the stop condition is issued to indicate the
end of the nonvolatile write command the X9118
initiates the internal write cycle. ACK polling, Flow 1,
can be initiated immediately. This involves issuing the
start condition followed by the device slave address. If
the X9118 is still busy with the write operation no ACK
will be returned. If the X9118 has completed the write
operation an ACK will be returned and the master can
then proceed with the next operation.

FLOW 1. ACK Polling Sequence

Nonvolatile Write

Command Completed

EnterACK Polling

Issue

START

Issue Slave

Address

ACK

Returned?

Further

Operation?

Issue

Instruction

Issue STOP

Yes

Proceed

Issue STOP

Proceed

X9118 Preliminary Information

Characteristics subject to change without notice.

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Instruction and Register Description

EVICE

DDRESSING

: I

DENTIFICATION

YTE

(ID

AND

Following a start condition the master must output the
address of the slave it is accessing. The most
significant four bits of the slave address are the device
type identifier. The ID[3:0] bits is the device id for the
X9118; this is fixed as 0101[B] (refer to Table 1).

The A[1:0] bits in the ID byte are the internal slave
address. The physical device address is defined by the
state of the A1-A0 input pins. The slave address is
externally specified by the user. The X9118 compares
the serial data stream with the address input state; a
successful compare of both address bits is required for
the X9118 to successfully continue the command

sequence. Only the device which slave address
matches the incoming device address sent by the
master executes the instruction. The A1-A0 inputs can
be actively driven by CMOS input signals or tied to V

or V

. The R/W bit is the LSB and is used to set the

device for read or write operations.

NSTRUCTION

YTE

AND

EGISTER

ELECTION

The next byte sent to the X9118 contains the
instruction and register pointer information. The three
most significant bits are used provide the instruction
opcode (I[2:0]). The RB and RA bits point to one of the
four registers. The format is shown below in Table 2.

Table 3 provides a complete summary of the
instruction set opcodes.

Table 1. Identification Byte Format

Table 2. Instruction Byte Format

Register Selected

DR0

DR1

DR2

DR3

ID3

ID2

ID1

ID0

R/W

(MSB)

(LSB)

Device Type

Identifier

Internal Slave

Address

Read or
Write Bit

(MSB)

(LSB)

Instruction

Opcode

Selection

X9118 Preliminary Information

Characteristics subject to change without notice.

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Table 3. Instruction Set

Note:

(1) 1/o = data is one or zero.

Instruction

Instruction Set

Operation

R/W

Read Wiper Counter
Register

Read the contents of the Wiper Counter
Register

Write Wiper Counter
Register

Write new value to the Wiper Counter
Register

Read Data Register

1/0

Read the contents of the Data Register
pointed to RB-RA.

Write Data Register

1/0

Write new value to the Data Register
pointed to RB-RA.

XFR Data Register to
Wiper Counter Register

1/0

Transfer the contents of the Data Register
pointed to by RB-RA to the Wiper Counter
Register

XFR Wiper Counter
Register to Data Regis-
ter

1/0

Transfer the contents of the Wiper Counter
Register to the Data Register
pointed to by RB-RA.

Instruction and Register Description

EVICE

DDRESSING

IPER

OUNTER

EGISTER

(WCR)

The X9118 contains a Wiper Counter Register (see
Table 4) for the XDCP potentiometer. The WCR is
equivalent to a serial-in, parallel-out register/counter
with its outputs decoded to select one of 1024
switches along its resistor array. The contents of the
WCR can be altered in one of three ways: (1) it may be
written directly by the host via the write Wiper Counter
Register instruction (serial load); (2) it may be written
indirectly by transferring the contents of one of four
associated Data Registers via the XFR Data register;
(3) it is loaded with the contents of its Data Register
zero (R0) upon power-up.

The Wiper Counter Register is a volatile register; that
is, its contents are lost when the X9118 is powered-
down. Although the register is automatically loaded

with the value in DR0 upon power-up, this may be
different from the value present at power-down. Power-
up guidelines are recommended to ensure proper
loadings of the DR0 value into the WCR .

ATA

EGISTERS

(DR)

The potentiometer has four 10-bit non-volatile Data
Registers. These can be read or written directly by the
host. Data can also be transferred between any of the
four data registers and the Wiper Counter Register. All
operations changing data in one of the Data Registers
is a nonvolatile operation and will take a maximum of
10ms.

If the application does not require storage of multiple
settings for the potentiometer, the Data Registers can
be used as regular memory locations for system
parameters or user preference data.

Bit 9Bit 0 are used to store one of the 1024 wiper
position (0 ~1023).

X9118

 Preliminary Information

Characteristics subject to change without notice.

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Table 4. Wiper Control Register, WCR (10-bit), WCR9WCR0: Used to store the current wiper position (Volatile, V)

Table 5. Data Register, DR (10-bit), Bit 9Bit 0: Used to store wiper positions or data (Non-Volatile, NV)

WCR9

WCR8

WCR7

WCR6

WCR5

WCR4

WCR3

WCR2

WCR1

WCR0

(MSB)

(LSB)

Bit 9

Bit 8

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

MSB

LSB

Four of the six instructions are four bytes in length.
These instructions are:

Read Wiper Counter Register read the current

wiper position of the potentiometer,

Write Wiper Counter Register change current

wiper position of the potentiometer,

Read Data Register read the contents of the

selected Data Register;

Write Data Register write a new value to the

selected Data Register.

The basic sequence of the four byte instructions is
illustrated in Figure 3. These four-byte instructions
exchange data between the WCR and one of the Data
Registers. A transfer from a data register to a WCR is
essentially a write to a static RAM, with the static RAM
controlling the wiper position. The response of the
wiper to this action will be delayed by t

WRL

. A transfer

from the WCR (current wiper position), to a data
register is a write to nonvolatile memory and takes a
minimum of t

to complete. The transfer can occur

between the potentiometer and one of its associated
registers.

Two instructions (see Figure 4) require a two-byte
sequence to complete. These instructions transfer data
between the host and the X9118; either between the
host and one of the Data Registers or directly between
the host and the Wiper Counter Register. These
instructions are:

XFR Data Register to Wiper Counter Register

This transfers the contents of one specified Data
Register to the Wiper Counter Register.

XFR Wiper Counter Register to Data Register

This transfers the contents of the specified Wiper
Counter Register to the specified Data Register.

See Instruction format for more details.

Other

OWER

AND

OWN

EQUIREMENTS

At all times, the V+ voltage must be greater than or
equal to the voltage at R

or R

, and the voltage at R

or R

must be greater than or equal to the voltage at

V-. During power up and power down, V

, V+, and V-

must reach their final values with 1msec of each
other.

Figure 3. Two-Byte Instruction Sequence

S
T
A
R
T

A0 R/W

A
C
K

RB RA 0

A
C
K

SCL

SDA

T
O
P

ID3 ID2 ID1 ID0

Device ID

Internal

Instruction

Opcode

Address

X9118

 Preliminary Information

Characteristics subject to change without notice.

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Figure 4. Four-Byte Instruction Sequence (Write or Read for WCR or Data Registers)

INSTRUCTION FORMAT

Read Wiper Counter Register (WCR)

Write Wiper Counter Register (WCR)

Read Data Register (DR)

S
T
A
R
T

Device Type

Identifier

Device

Addresses

S
A
C
K

Instruction

Opcode

Addresses

S
A
C
K

Wiper Position

(Sent by Slave on SDA)

A
C
K

Wiper Position

(Sent by Slave on SDA)

A
C
K

S
T

0 A 1 A 0

R / W

= 1

C
R

S
T
A
R
T

Device Type

Identifier

Device

Addresses

S
A
C
K

Instruction

Opcode

Addresses

S
A
C
K

Wiper Position

(Sent by Master on SDA)

S
A
C
K

Wiper Position

(Sent by Master on SDA)

S
A
C
K

S
T

0 A 1 A 0

R /

= 0

C
R

S
T
A
R
T

Device Type

Identifier

Device

Addresses

S
A
C
K

Instruction

Opcode

Addresses

S
A
C
K

Wiper Position

(Sent by Slave on SDA)

A
C
K

wiper position or data

(Sent by Slave on SDA)

A
C
K

S
T

0 A 1 A 0

R /

= 1

0 RB RA 0

C
R

T
A
R
T

C
K

A
C

SCL

SDA

A
C
K

S
T

O
P

A
C

ID3 ID2 ID1 ID0 0 A1 A0 R/W

X X

C
R

I1 I0

0 RB RA

Device ID

Internal
Address

Instruction

Opcode

Wiper or Data

Position

X9118 Preliminary Information

Characteristics subject to change without notice.

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Write Data Register (DR)

Transfer Wiper Counter Register (WCR) to Data Register (DR)

Transfer Data Register (DR) to Wiper Counter Register (WCR)

Notes: (1) "A1 ~ A0": stand for the device addresses sent by the master.

(2) WCRx refers to wiper position data in the Wiper Counter Register

S
T
A
R
T

Device Type

Identifier

Device

Addresses

S
A
C
K

Instruction

Opcode

Addresses

S
A
C
K

Wiper Position or Data

(Sent by Master on SDA)

S
A
C
K

Wiper Position or Data

(Sent by Master on SDA)

S
A
C
K

S
T

HIGH-V

WRITE CYCLE

1 0 A 1 A 0

R /

= 0

1 1 0 0 RB RA 0

X X X X X X

C
R

S
T
A
R
T

Device Type

Identifier

Device

Addresses

S
A
C
K

Instruction

Opcode

Addresses

S
A
C
K

S
T

HIGH-VOLTAGE

WRITE CYCLE

0 A 1 A 0

R /

= 0

0 RB RA 0

S
T
A
R
T

Device Type

Identifier

Device

Addresses

S
A
C
K

Instruction

Opcode

Addresses

S
A
C
K

S
T

0 A 1 A 0

R /

= 1

0 RB RA 0

X9118

 Preliminary Information

Characteristics subject to change without notice.

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ABSOLUTE MAXIMUM RATINGS

Temperature under bias.................... 65°C to +135°C
Storage temperature......................... 65°C to +150°C
Voltage on SCL, SDA, or any address input

with respect to V

................................. 1V to +7V

Voltage on V+ (referenced to V

)

(4)

......................10V

Voltage on V- (referenced to V

)

(4)

..................... -10V

(V+) (V-) ..............................................................12V
Any Voltage on R

/ R

............................................V+

Any Voltage on R

/ R

..............................................V-

Lead temperature (soldering, 10 seconds) ........ 300

°C

(10 seconds) ..................................................±6mA

COMMENT

Stresses above those listed under "Absolute Maximum
Ratings" may cause permanent damage to the device.
This is a stress rating only; the functional operation of
the device (at these or any other conditions above
those listed in the operational sections of this
specification) is not implied. Exposure to absolute
maximum rating conditions for extended periods may
affect device reliability.

ANALOG CHARACTERISTICS (Over recommended industrial (2.7V) operation conditions unless otherwise stated.)

Symbol

Parameter

Limits

Test Conditions

Min.

Typ.

Max.

Units

TOTAL

End to End Resistance

100

End to End Resistance Tolerance

±20

Power Rating

25°C, each pot

Wiper Current

±3

Wiper Resistance

150

500

Wiper Current =

± 3mA, V

= 3V

Wiper Resistance

100

± 3mA, V

= 5V

Vv+

Voltage on V+ pin

+4.5

+5.5

X9118

(4)

+2.7

+5.5

X9118-2.7

(4)

Vv-

Voltage on V- pin

-5.5

-4.5

X9118

-5.5

-2.7

X9118-2.7

TERM

Voltage on any R

or R

V-

V+

= 0V

Noise

-120

dBV

Ref: 1V

Resolution

0.1

Absolute Linearity

(1)

±1

(3)

w(n)(actual)

w(n)(expected)

where n=8 to 1006

±1.5

(3)

w(n)(actual)

w(n)(expected)

(5)

Relative Linearity

(2)

±0.5

(3)

w(m + 1)

w(m)

+ MI], where

m=8 to 1006

±1

(3)

w(m + 1)

w(m)

+ MI]

(5)

Temperature Coefficient of R

TOTAL

±300

ppm/°C

Ratiometric Temp. Coefficient

ppm/°C

Potentiometer Capacitancies

10/10/25

See Macro model

RECOMMENDED OPERATING CONDITIONS

Temp

Min.

Max.

Commercial

°C

+70

°C

Industrial

°C

+85

°C

Device

Supply Voltage (V

) Limits

(4)

X9118

±10%

X9118-2.7

2.7V to 5.5V

X9118

 Preliminary Information

Characteristics subject to change without notice.

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Notes: (1) Absolute linearity is utilized to determine actual wiper voltage versus expected voltage as determined by wiper position when used

as a potentiometer.

(2) Relative linearity is utilized to determine the actual change in voltage between two successive tap positions when used as a

potentiometer. It is a measure of the error in step size.

(3) MI = RTOT / 1023 or (R

) / 1023, single pot

(4) V

, V+, V- must reach their final values within 1 msec of each other.

(5) n = 0, 1, 2, ...,1023; m =0, 1, 2, ..., 1022.

D.C. OPERATING CHARACTERISTICS (Over the recommended operating conditions unless otherwise specified.)

ENDURANCE AND DATA RETENTION

CAPACITANCE

POWER-UP TIMING

Notes: (6) This parameter is not 100% tested

(7) t

PUR

and t

PUW

are the delays required from the time the (last) power supply (Vcc-) is stable until the specific instruction can be

issued. These parameters are periodically sampled and not 100% tested.

Symbol

Parameter

Limits

Test Conditions

Min.

Typ.

Max.

Units

CC1

supply current

(active)

SCL

= 400KHz; V

= +5.5V;

SDA = Open; (for 2-wire, Active, Read and
Volatile Write States only)

CC2

supply current

(nonvolatile write)

SCL

= 400KHz; V

= +5.5V;

SDA = Open; (for 2-wire, Active,
Non-volatile Write State only)

current

(standby)

µA

= +5.5V; V

= V

or V

; SDA = V

;

(for 2-wire, Standby State only)

Input leakage current

µA

= V

to V

Output leakage
current

µA

OUT

= V

to V

Input HIGH voltage

x 0.7

+ 1

Input LOW voltage

x 0.3

Output LOW voltage

0.4

= 3mA

Output HIGH voltage

Parameter

Min.

Units

Minimum Endurance

100,000

Data changes per bit per register

Data Retention

100

years

Symbol

Test

Max.

Units

Test Conditions

IN/OUT

(6)

Input/Output capacitance (SI)

OUT

= 0V

(6)

Input capacitance (SCL, WP, A2, A1 and A0)

= 0V

Symbol

Parameter Min.

Max.

Units

(6)

Power-up Rate

0.2

V/ms

PUR

(7)

Power-up to Initiation of read operation

PUW

(7)

Power-up to Initiation of write operation

X9118

 Preliminary Information

Characteristics subject to change without notice.

14 of 22

REV 1.1.6 1/30/03

www.xicor.com

A.C. TEST CONDITIONS

EQUIVALENT A.C. LOAD CIRCUIT

AC TIMINGHIGH-VOLTAGE WRITE CYCLE TIMING

nput pulse levels

x 0.1 to V

x 0.9

Input rise and fall times

10ns

Input and output timing level

x 0.5

Symbol

Parameter

Min.

Max.

Units

SCL

Clock Frequency

400

kHz

CYC

Clock Cycle Time

2500

HIGH

Clock High Time

600

LOW

Clock Low Time

1300

SU:STA

Start Setup Time

600

HD:STA

Start Hold Time

600

SU:STO

Stop Setup Time

600

SU:DAT

SDA Data Input Setup Time

100

HD:DAT

SDA Data Input Hold Time

SCL and SDA Rise Time

300

SCL and SDA Fall Time

300

SCL Low to SDA Data Output Valid Time

250

SDA Data Output Hold Time

Noise Suppression Time Constant at SCL and SDA inputs

BUF

Bus Free Time (Prior to Any Transmission)

1300

SU:WPA

A0, A1 Setup Time

HD:WPA

A0, A1 Hold Time

10pF

TOTAL

25pF

10pF

SPICE Macromodel

1533

100pF

SDA OUTPUT

867

100pF

SDA OUTPUT

X9118

 Preliminary Information

Characteristics subject to change without notice.

15 of 22

REV 1.1.6 1/30/03

www.xicor.com

HIGH-VOLTAGE WRITE CYCLE TIMING

XDCP TIMING

SYMBOL TABLE

Symbol

Parameter

Typ.

Max.

Units

High-voltage write cycle time (store instructions)

Symbol

Parameter

Min.

Max.

Units

WRPO

Wiper response time after the third (last) power supply is stable

µs

WRL

Wiper response time after instruction issued (all load
instructions)

µs

WAVEFORM

INPUTS

OUTPUTS

Must be
steady

Will be
steady

May change
from Low to
High

Will change
from Low to
High

May change
from High to
Low

Will change
from High to
Low

Don't Care:
Changes
Allowed

Changing:
State Not
Known

N/A

Center Line
is High
Impedance

X9118

 Preliminary Information

Characteristics subject to change without notice.

18 of 22

REV 1.1.6 1/30/03

www.xicor.com

APPLICATIONS INFORMATION

Basic Configurations of Electronic Potentiometers

Application Circuits

Three terminal Potentiometer;
Variable voltage divider

Two terminal Variable Resistor;
Variable current

Noninverting Amplifier

Voltage Regulator

Offset Voltage Adjustment

Comparator with Hysterisis

= (1+R

adj

(REG) = 1.25V (1+R

)+I

adj

(REG)

317

= {R

/(R

)} V

(max)

= {R

/(R

)} V

(min)

100K

10K

-12V

+12V

TL072

}

X9118 Preliminary Information

Characteristics subject to change without notice.

19 of 22

REV 1.1.6 1/30/03

www.xicor.com

Application Circuits (Continued)

Attenuator

Filter

Inverting Amplifier

Equivalent L-R Circuit

= G V

-1/2

G +1/2

= 1 + R

fc = 1/(2

RC)

= R

+ s R

+ R

) C

= R

+ s Leq

+ R

) >> R

Function Generator

= R

= 10k

}

= G V

G = - R

}

frequency

, R

, C

amplitude

, R

X9118 Preliminary Information

Characteristics subject to change without notice.

20 of 22

REV 1.1.6 1/30/03

www.xicor.com

Top View (Bump Side Down)

Side View (Bump Side Down)

Bottom View (Bump Side Up)

Note: Drawing not to scale

= Die Orientation mark

Symbol

Millimeters

Inches

Min

Nom.

Max

Min

Nom.

Max

Package Body Dimension X

Package Body Dimension Y

Package Height

Package Body Thickness

Ball Height

Ball Diameter

Total Ball Count

Ball Count X Axis

Ball Count Y Axis

Pins Pitch XAxis

Pins Pitch Y Axis

Edge to Ball Center (Corner)
Distance Along X

Edge to Ball Center (Corner)
Distance Along Y

XX-ball BGA (X9118xxxxxxx)

X9118 Preliminary Information

Characteristics subject to change without notice.

22 of 22

LIMITED WARRANTY

Devices sold by Xicor, Inc. are covered by the warranty and patent indemnification provisions appearing in its Terms of Sale only. Xicor, Inc. makes no warranty,
express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement.
Xicor, Inc. makes no warranty of merchantability or fitness for any purpose. Xicor, Inc. reserves the right to discontinue production and change specifications and prices
at any time and without notice.

Xicor, Inc. assumes no responsibility for the use of any circuitry other than circuitry embodied in a Xicor, Inc. product. No other circuits, patents, or licenses are implied.

TRADEMARK DISCLAIMER:

Xicor and the Xicor logo are registered trademarks of Xicor, Inc. AutoStore, Direct Write, Block Lock, SerialFlash, MPS, and XDCP are also trademarks of Xicor, Inc. All
others belong to their respective owners.

U.S. PATENTS

Xicor products are covered by one or more of the following U.S. Patents: 4,326,134; 4,393,481; 4,404,475; 4,450,402; 4,486,769; 4,488,060; 4,520,461; 4,533,846;
4,599,706; 4,617,652; 4,668,932; 4,752,912; 4,829,482; 4,874,967; 4,883,976; 4,980,859; 5,012,132; 5,003,197; 5,023,694; 5,084,667; 5,153,880; 5,153,691;
5,161,137; 5,219,774; 5,270,927; 5,324,676; 5,434,396; 5,544,103; 5,587,573; 5,835,409; 5,977,585. Foreign patents and additional patents pending.

LIFE RELATED POLICY

In situations where semiconductor component failure may endanger life, system designers using this product should design the system with appropriate error detection
and correction, redundancy and back-up features to prevent such an occurrence.

Xicor's products are not authorized for use in critical components in life support devices or systems.

1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to

perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user.

2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life

support device or system, or to affect its safety or effectiveness.

REV 1.1.6 1/30/03

www.xicor.com

ORDERING INFORMATION

Device

Limits

Blank = 5V

±10%

2.7 = 2.7 to 5.5V

Temperature Range
Blank = Commercial = 0

°C to +70°C

I = Industrial = 40

°C to +85°C

Package
V14 = 14-Lead TSSOP
B15 = 15-Lead CSP (Call Factory

for Availiability)

Potentiometer Organization

Pot

T =

100K

X9118

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ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: X9118TB15I