Contents
Features ....................................................
1
Pin Assignment .........................................
1
Pin Functions.............................................
1
Block Diagram ...........................................
2
Instruction Set ...........................................
2
Absolute Maximum Ratings .......................
2
Recommended Operating Conditions ........
3
Pin Capacitance ........................................
3
Endurance .................................................
3
DC Electrical Characteristics .....................
4
AC Electrical Characteristics .....................
5
Operation...................................................
6
Receiving a Start-Bit..................................
9
Three-wire Interface
(DI-DO direct connection) ..........................
9
Connecting to the CPU with Serial Port ..... 10
Memory Protection .................................... 10
Characteristics........................................... 11
Ordering Information ................................. 16
Dimensions................................................ 17
Seiko Instruments Inc.
1
The S-29X91A Series is high speed, low power 1K/2K/4K-bit serial
E
2
PROM with a wide operating voltage range. They are organized as
64-word x 16-bit, 128-word x 16-bit and 256-word x 16-bit, respectively.
Each is capable of sequential read, where addresses are automatically
incremented in 16-bit blocks.
The S-29X91A Series is capable of protecting the memory, 50% of which
can be protected starting from address 00.
Interface is structured so that this IC can be directly connected to the
CPU with serial ports. 8-bit instructions make it easy to prepare your
own software.
n
n
Pin Assignment
n
n
Pin Functions
Name
Pin Number
Function
SOP2
SSOP
CS
1
3
Chip select input
SK
2
4
Serial clock input
DI
3
5
Serial data input
DO
4
6
Serial data output
GND
5
7
Ground
PROTECT
6
8
Memory Protection Control Input
Connected to GND or Open : Protection Valid
Connected to Vcc
: Protection Invalid
NC
7
1
No Connection
V
CC
8
2
Power supply
CMOS SERIAL E
2
PROM
S-29X91A Series
n
n
Features
Low power consumption
Standby
: 1.0
A Max. (V
CC
=6.5 V)
Operating
: 0.8 mA Max. (V
CC
=5.5 V)
: 0.4 mA Max. (V
CC
=2.5 V)
Low operating
voltage
range
Write
: 2.5 to 6.5 V
Read
: 1.8 to 6.5 V
Sequential
read capable
Memory Protection
Can be easily connected to the serial port
CS Active "H"
Endurance : 10
5
cycles/word
Data retention : 10 years
S-29191A : 1K bits
S-29291A : 2K bits
S-29391A : 4K bits
Table
1
Figure 1
8-pin SOP1
Top view
8-pin DIP
Top view
V
CC
DO
NC
SK
DI
GND
1
2
3
4
5
6
7
8
V
CC
GND
DO
DI
6
5
8
7
SK
NC
CS
PROTECT
CS
PROTECT
S-29191ADP
S-29291ADP
S-29391ADP
S-29191AFJ
S-29291AFJ
S-29391AFJ
3
4
1
2
*
differs depending on the package type :
A : A type, (blank) : B type
See
n
Dimensions.
Rev.1.1
COMS SERIAL E
2
PROM
S-29X91A Series
2
Seiko Instruments Inc.
n
n
Block Diagram
n
n
Instruction Set
Table 2
Instruction
Start
Ope
Address
Data
Bit
code
S-29191A
S-29291A
S-29391A
READ (Read data)
1
1000xxx
xxA
5
to A
0
XA
6
to A
0
A
7
to A
0
D
15
to D
0
Output*
PROGRAM (Program data)
1
x100xxx
xxA
5
to A
0
XA
6
to A
0
A
7
to A
0
D
15
to D
0
Input
WRITE (Write all)
1
0001xxx
xxxxxxxx
xxxxxxxx
xxxxxxxx
D
15
to D
0
Input
ERASE (Erase all)
1
0010xxx
xxxxxxxx
xxxxxxxx
xxxxxxxx
PEN
(Program enable)
1
0011xxx
xxxxxxxx
xxxxxxxx
xxxxxxxx
PDS
(Program disable)
1
0000xxx
xxxxxxxx
xxxxxxxx
xxxxxxxx
x : Doesn't matter.
* : When 16-bit data of the specified address is output, the data of the next address is output.
n
n
Absolute Maximum Ratings
Parameter
Symbol
Ratings
Unit
Power supply voltage
V
CC
-0.3 to +7.0
V
Input voltage
V
IN
-0.3 to V
CC
+0.3
V
Output voltage
V
OUT
-0.3 to V
CC
V
Storage temperature under bias
T
bias
-50 to +95
C
Storage temperature
T
stg
-65 to +150
C
* 50% of the memory can be protected starting from address 00
Figure 2
Data register
Address
decoder
Mode decode logic
Clock generator
Output buffer
V
CC
GND
DO
DI
CS
SK
Memory array
PROTECT
Bank 1*
Bank 2
Write Protection
Circuit
Table
3
CMOS SERIAL E2PROM
S-29X91A Series
Seiko Instruments Inc.
3
n
n
Recommended Operating Conditions
Table
4
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Unit
Read Operation
Write Enable/Disable
1.8
6.5
V
Power supply voltage
V
CC
Write Operation
2.5
6.5
V
V
CC
=5.5 to 6.5 V
0.8xVcc
Vcc
V
V
CC
=4.5 to 5.5 V
2.0
Vcc
V
V
CC
=2.7 to 4.5 V
0.8xVcc
Vcc
V
High level input voltage
V
IH
V
CC
=1.8 to 2.7 V
0.8xVcc
Vcc
V
V
CC
=5.5 to 6.5 V
0.0
0.2xVcc
V
V
CC
=4.5 to 5.5 V
0.0
0.8
V
V
CC
=2.7 to 4.5 V
0.0
0.2xVcc
V
Low level input voltage
V
IL
V
CC
=1.8 to 2.7 V
0.0
0.15xVcc
V
Operating temperature
T
opr
-40
+85
C
n
n
Pin Capacitance
Table 5
(Ta=25
C, f=1.0 MHz, V
CC
=5 V)
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Unit
Input Capacitance
C
IN
V
IN
=0 V
8
pF
Output Capacitance
C
OUT
V
OUT
=0 V
10
pF
n
n
Endurance
Table 6
Parameter
Symbol
Min.
Typ.
Max.
Unit
Endurance
N
W
10
5
cycles/word
COMS SERIAL E
2
PROM
S-29X91A Series
4
Seiko Instruments Inc.
n
n
DC Electrical Characteristics
V
CC
=5.5 V to 6.5 V V
CC
=4.5 V to 5.5 V V
CC
=2.5 to 4.5 V
V
CC
=1.8 to 2.5 V
Parameter
Smbo
l
Conditions
Min. Typ. Max.
Min. Typ. Max.
Min. Typ. Max. Min. Typ. Max.
Unit
Current
consumption
(READ)
I
CC1
DO
unloaded
1.0
0.8
0.6
0.4
mA
Current
consumption
(PROGRAM)
I
CC2
DO
unloaded
2.5
2.0
1.5
mA
Parameter
Smbol
Conditions
V
CC
=4.5 V to 6.5 V
V
CC
=2.5 to 4.5 V
V
CC
=1.8 to 2.5 V
Unit
Min.
Typ. Max.
Min.
Typ. Max.
Min.
Typ. Max.
Standby current
consumption
I
SB
CS=GND DO=Open
Other input: Connected to
V
CC
or GND
1.0
0.6
0.4
A
Input leakage
current
I
LI
V
IN
=GND to V
CC
0.1
1.0
0.1
1.0
0.1
1.0
A
Output leakage
current
I
LO
V
OUT
=GND to V
CC
0.1
1.0
0.1
1.0
0.1
1.0
A
Low level output
V
OL
I
OL
=2.1mA
0.45
V
voltage
I
OL
=100
A
0.1
0.1
0.1
V
High level output
I
OH
=-400
A
2.4
V
voltage
V
OH
I
OH
=-100
A
V
CC
-0.7
V
CC
-0.7
V
I
OH
=-10
A
V
CC
-0.7
V
CC
-0.7
V
CC
-0.3
V
Write enable latch
data hold voltage
V
DH
Only when write disable
mode
1.5
1.5
1.5
V
Pull-down current
I
PD
PROTECT terminal=V
CC
15
100
3
50
1
10
A
Table 7
Table 8
CMOS SERIAL E2PROM
S-29X91A Series
Seiko Instruments Inc.
5
n
n
AC Electrical Characteristics
Table 9 Measuring conditions
Input pulse voltage
0.1 x V
CC
to 0.9-x V
CC
Output reference voltage
0.5 x V
CC
Output load
100pF
V
CC
=4.5 to 6.5V
V
CC
=2.5 to 4.5 V
V
CC
=1.8 to 2.5V
Parameter
Smbl
Min.
Typ.
Max.
Min.
Typ.
Max.
Min.
Typ.
Max.
Unit
CS setup time
t
CSS
0.2
0.4
1.0
s
CS hold time
t
CSH
0.2
0.4
1.0
s
CS deselect time
t
CDS
0.2
0.2
0.4
s
Data setup time
t
DS
0.2
0.4
0.8
s
Data hold time
t
DH
0.2
0.4
0.8
s
Output delay time
t
PD
0.4
1.0
2.0
s
Clock frequency
f
SK
0
2.0
0
0.5
0.25
MHz
Clock pulse width
t
SKH
t
SKL
0.25
1.0
2.0
s
Output disable time
t
HZ1
t
HZ2
0
0.15
0
0.5
0
1.0
s
Output enable time
t
SV
0
0.15
0
0.5
0
1.0
s
Programming time
t
PR
4.0
10.0
4.0
10.0
ms
Table 10
Figure 3 Timing Chart
t
SKH
t
CDS
t
CSS
CS
Valid data
Valid data
DI
t
SKL
SK
t
SV
t
HZ2
t
CSH
t
HZ1
t
PD
t
DS
t
DH
t
DS
t
DH
Hi-Z
Hi-Z
Hi-Z
DO
DO
(READ)
(VERIFY)
Hi-Z
t
PD
Input data is retrieved on the rising edge of SK.
Output data is triggered on the falling edge of SK.
Figure 4 Timing Chart for t
CSS
and t
CSH
when SK is "H"
t
CSS
SK
CS
t
CSH
CMOS SERIAL E
2
PROM
S-29X91A Series
6
Seiko Instruments Inc.
n
n
Operation
Instructions (in the order of start-bit, instruction, address, and data) are latched to DI in synchronization with the rising
edge of SK after CS goes high. A start-bit can only be recognized when the high of DI is latched at the rising edge of
SK after changing CS to high, it is impossible for it to be recognized as long as DI is low, even if there are SK pulses
after CS goes high. Instruction finishes when CS goes low, where it must be low between commands during t
CDS
.
All input, including DI and SK signals, is ignored while CS is low, which is stand-by mode. The start bit + instruction,
address, and data are 8-bit instructions. This makes it easy to prepare your own software using a serial interface
incorporated into the CPU.
1. READ
The READ instruction reads data from a specified address. After A0 is latched at the rising edge of SK, 16-bit data is
continuously output in synchronization with the falling edge of SK.
When all of the data (D
15
to D
0
) in the specified address has been read, the data in the next address can be read with
the input of another SK clock. Thus, the data over whole area of the memory can be read by continuously inputting
SK clocks as long as CS is high.
The last address (An
L
A1 A0 = 1
L
11) rolls over to the top address (An
L
A1 A0 = 0
L
00).
Figure 5 Read Timing (S-29391A)
*
On the S-29191A, A
7
and A
6
are optional.
On the S-29291A, A
7
is optional.
A
0
A
6
17
50
34
19
D
15
D
15
D
14
D
14
D
13
D
14
Hi
-
Z
A
7
A
6
A
5
A
4
A
3
A
2
A
1
A
0
+1
D
13
D
0
D
1
D
2
D
15
Hi-Z
A
1
A
2
A
3
A
4
A
5
A
7
0
1
33
32
31
30
29
16
15
9
3
2
1
49
48
47
46
45
A
7
A
6
A
5
A
4
A
3
A
2
A
1
A
0
+2
D
13
D
0
D
1
D
2
18
CS
SK
DI
DO
8
7
6
5
4
12
14
11
10
13
X
X
X
0
0
* *
CMOS SERIAL E
2
PROM
S-29X91A Series
Seiko Instruments Inc.
7
2.
Write (PROGRAM ,WRAL, ERAL)
The write instructions (PROGRAM, WRAL, ERAL) automatically begins writing to the non-volatile memory when
CS goes low at the completion of the specified clock input.
The write operation is completed in 10 ms (t
PR
Max.), and the typical write period is less than 5 ms. In the S-
29X94A Series, it is easy to VERIFY the completion of the write operation in order to minimize the write cycle by
setting CS to high and checking the DO pin, which is low during the write operation and high after its completion.
This VERIFY procedure can be executed over and over again.
There are two methods to detect a change in the DO output. One is to detect a change from low to high setting
CS to high, and the other is to detect a change from low to high as a result of repetitous operations of returning
the CS to low after setting CS to high and checking the DO output.
Because all SK and DI inputs are ignored during the write operation, any input of instruction will also be
disregarded. When DO outputs high after completion of the write operation or if it is in the high-impedence state
(Hi-Z), the input of instructions is available. Even if the DO pin remains high, it will enter the high-impedence
state upon the recognition of a high of DI (start-bit) attached to the rising edge of an SK pulse.
DI input should be low during the VERIFY procedure.
2.1 PROGRAM
This instruction writes 16-bit data to a specified address.
After changing CS to high, input a start-bit, op-code (PROGRAM), address, and 16-bit data. If there is a data
overflow of more than 16 bits, only the last 16-bits of the data is considered valid. Changing CS to low will start
the PROGRAM operation. It is not necessary to make the data "1" before initiating the PROGRAM operation.
Figure 6 WRITE Timing (S-29391A)
*
On the S-29191A, A
7
and A
6
are optional.
On the S-29291A, A
7
is optional.
t
CDS
X
11
32
t
PR
busy
ready
D15
Hi-Z
t
SV
16
Hi-Z
17
10
9
8
7
6
5
3
2
1
SK
DI
DO
A0
D0
4
t
HZ1
0
A5
A6*
A7*
X
0
X
X
1
Standby
CS
VERIFY
CMOS SERIAL E
2
PROM
S-29X91A Series
8
Seiko Instruments Inc.
2.2 Write all (WRAL)
This instruction writes the same 16-bit data into every address.
After changing CS to high, input a start-bit, op-code (WRAL), address(optional), and 16-bit data. If there is a data
overflow of more than 16 bits, the write data is shifted for every clock in succession and only the last 16-bit data is
valid. Changing CS to low starts the WRAL operation. It is not necessary to make the data "1" before initiating
the WRAL operation.
2.3 Erase all (ERAL)
This instruction erases the data in every address. All data changes to "1."
After changing CS to high, input a start-bit, op-code (ERAL), and address (optional). It is not necessary to input
data. Changing CS to low starts the ERAL operation.
3.
Write enable (PEN) and Write disable (PDS)
The PEN instruction puts the S-29X94A Series into write enable mode, which accepts PROGRAM, WRAL, and
ERAL instruction. The PDS instruction puts the S-29X94A Series into write disable mode, which refuses
PROGRAM, WRAL, and ERAL instruction.
The S-29X94A Series powers on in write disable mode, which protects data against unexpected, erroneous write
operations caused by noise and/or CPU malfunctions. It should be kept in write disable mode except when
performing write operations.
Figure 7 WRAL Timing
Figure 8 ERAL Timing
Figure 9 PEN/PDS Timing
11=PEN
00=PDS
0
0
X
1
2
3
4
5
6
7
8
DI
CS
SK
X
X
16
X
Hi-Z
17
16
t
PR
1
t
SV
15
14
D15
0
0
8
7
6
5
4
3
2
1
SK
DI
DO
0
D0
Hi-Z
t
HZ1
ready
busy
9
32
X
X
X
X
X
X
X
t
CDS
VERIFY
CS
Standby
Hi-Z
16
t
PR
1
t
SV
15
14
X
0
0
8
7
6
5
4
3
2
1
SK
DI
DO
0
X
Hi-Z
t
HZ1
ready
busy
9
X
X
X
X
X
t
CDS
CS
VERIFY
Standby
CMOS SERIAL E
2
PROM
S-29X91A Series
Seiko Instruments Inc.
9
n
n
Receiving a Start-Bit
A start-bit can be recognized by latching the high level of DI at the rising edge of SK after changing CS to high (Start-
Bit Recognition). The write operation begins by inputting the write instruction and setting CS to low. The DO pin then
outputs low during the write operation and high at its completion by setting CS to high (Verify Operation). Therefore,
only after a write operation, in order to accept the next command by having CS go high, the DO pin is switched from a
state of high-impedence to a state of data output; but if it recognizes a start-bit, the DO pin returns to a state of high-
impedence (see Figure 3).
Make sure that data output from the CPU does not interfere with the data output from the serial memory IC when you
configure a 3-wire interface by connecting DI input pin and DO output pin. Such interference may cause a start-bit
fetch problem.
n
n
Three-Wire Interface (DI-DO direct connection)
Although the normal configuration of a serial interface is a 4-wire interface to CS, SK, DI, and DO, a 3-wire interface is
also a possibility by connecting DI and DO. However, since there is a possibility that the DO output from the serial
memory IC will interfere with the data output from the CPU with a 3-wire interface, install a resistor between DI and
DO in order to give preference to data output from the CPU to DI(See Figure 10).
Figure 10 3-wire interface
DI
SIO
DO
CPU
S-29X91A
R : 10
100 k
CMOS SERIAL E
2
PROM
S-29X91A Series
10
Seiko Instruments Inc.
n
n
Connecting to the CPU with Serial Port
n
n
Memory Protection
The S-29X91A Series is capable of protecting the memory. So, the contents of the memory will not be miswritten due
to error run or malfunction of the CPU. When the PROTECT terminal is connected to GND or OPEN, write to Bank 1
in the memory array is prohibited (50% of the memory can be protected starting from address 00). Because the pull-
down resistance is connected to the PROTECT terminal internally, the memory can be automatically protected when
the PROTECT terminal is OPEN. When the protection is valid, the data in the memory of Bank 1 will not be rewritten.
However, because the write control circuit inside the IC functions, the next instruction cannot be executed during the
time period of writing (t
PR
). While write instruction is being input and write is being executed, always connect the
PROTECT terminal to "H," "L" or OPEN, and leave the input signal unchanged (see Figure 13).
Figure 11 Connectin Example
Figure 12 Serial Shift Timing
S-29X91A
SO
DI
I/O
SK
SI
CPU
SK
DO
CS
DO
7
DO
6
DO
5
DO
4
DO
3
DO
2
DO
1
DO
0
DI
7
DI
6
DI
5
DI
4
DI
3
DI
2
DI
1
DI
0
SK
SI
SO
CPU data output
CPU data fetch
Figure 13 PROTECT Terminal Input Signal Timing
CS
VERIF
Write Instruction Input
DO
busy
Hi-Z
Hi-Z
ready
t
PR
0.2
s Min.
0.2
s Min.
PROTECT
DI
SK
CMOS SERIAL E
2
PROM
S-29X91A Series
Seiko Instruments Inc.
11
n
n
Characteristics
1. DC Characteristics
Ta (
C)
0.4
0.2
V
CC
=5.5 V
f
SK
=2 MHz
DATA=0101
0
-40 0
85
I
CC1
(mA)
Ta (
C)
0.4
0.2
V
CC
=3.3 V
f
SK
=500 KHz
DATA=0101
0
-40
0
85
I
CC1
(mA)
1.1
Current consumption (READ) I
CC1
-
Ambient temperature Ta
1.2
Current consumption (READ) I
CC1
-
Ambient temperature Ta
Ta (
C)
1.0
0.5
V
CC
=5.5 V
0
-40 0
85
I
CC2
(mA)
Ta (
C)
1.0
0.5
V
CC
=3.3 V
0
-40 0
85
I
CC2
(mA)
1.7
Current consumption (PROGRAM) I
CC2
-
Ambient temperature Ta
1.8
Current consumption (PROGRAM) I
CC2
-
Ambient temperature Ta
0.4
0.2
0
2
3
4
5
6
7
Ta=25
C
f
SK
=100 KHz, 10 KHz
DATA=0101
V
CC
(V)
0.4
0.2
0
I
CC1
(mA)
V
CC
=5.0 V
Ta=25
C
1M 2M
10K 100K
f
SK
(Hz)
I
CC1
(mA)
100KHZ
10KH
Z
1.5
Current consumption (READ) I
CC1
-
Power supply voltage V
CC
1.6
Current consumption (READ) I
CC1
-
Clock frequency f
SK
Ta (
C)
0.4
0.2
V
CC
=1.8 V
f
SK
=10 KHz
DATA=0101
0
-40 0
85
I
CC1
(mA)
0.4
0.2
0
2
3
4
5 6
7
Ta=25
C
f
SK
=1 MHz, 500 KHz
DATA=0101
V
CC
(V)
I
CC1
(mA)
1MHZ
500KH
Z
1.3
Current consumption (READ) I
CC1
-
Ambient temperature Ta
1.4
Current consumption (READ) I
CC1
-
Power supply voltage V
CC
CMOS SERIAL E
2
PROM
S-29X91A Series
12
Seiko Instruments Inc.
1.0
0.5
0
2
3
4
5
6
7
Ta=25
C
V
CC
(V)
I
CC2
(mA)
1.9
Current consumption (PROGRAM) I
CC2
-
Power supply voltage V
CC
10
-6
10
-7
10
-8
10
-9
10
-10
V
CC
=5.5 V
10
-11
Ta (
C)
-40 0
85
I
SB
(A)
1.10
Standby current consumption I
SB
-
Ambient temperature Ta
Ta (
C)
1.0
0.5
V
CC
=5.5 V
DO=5.5 V
0
-40 0
85
I
LO
(
A)
Ta (
C)
4.6
4.4
V
CC
=4.5 V
I
OH
=-400
A
-40 0
85
V
OH
(V)
4.2
1.15
Output leakage current I
LO
-
Ambient temperature Ta
1.16
High level output voltage V
OH
-
Ambient temperature Ta
Ta (
C)
1.0
0.5
V
CC
=5.5 V
DO=0 V
0
-40 0
85
I
LO
(
A)
Ta (
C)
1.0
0.5
0
-40 0
85
V
CC
=5.5 V
CS, SK, DI,
TEST=5.5 V
ILI
(
A)
1.14
Output leakage current I
LO
-
Ambient temperature Ta
1.13
Input leakage current I
LI
-
Ambient temperature Ta
Ta (
C)
1.0
0.5
VCC=5.5 V
CS, SK, DI,
TEST=0 V
0
-40 0
85
I
LI
(
A)
1.12
Input leakage current ILI -
Ambient temperature Ta
40
20
0
2
3
4
5
6
7
Ta=25
C
V
CC
(V)
I
PD
(
A)
1.11
Pull-Down current I
PD
-
Power supply voltage V
CC
CMOS SERIAL E
2
PROM
S-29X91A Series
Seiko Instruments Inc.
13
Ta (
C)
0.3
0.2
V
CC
=4.5 V
I
OL
=2.1 mA
-40 0
85
V
OL
(V)
0.1
Ta (
C)
0.03
0.02
V
CC
=1.8 V
I
OL
=100
A
-40 0
85
V
OL
(V)
0.01
1.19
Low level output voltage V
OL
-
Ambient temperature Ta
1.20
Low level output voltage V
OL
-
Ambient temperature Ta
Ta (
C)
-10.0
-5.0
V
CC
=4.5 V
V
OH
=2.4 V
0
-40 0
85
I
OH
(mA)
Ta (
C)
-4
-2
V
CC
=2.7 V
V
OH
=2.0 V
0
-40 0
85
I
OH
(mA)
1.21
High level output current I
OH
-
Ambient temperature Ta
1.22
High level output current I
OH
-
Ambient temperature Ta
Ta (
C)
-4
-2
V
CC
=2.5 V
V
OH
=1.8 V
0
-40 0
85
I
OH
(mA)
Ta (
C)
20
10
V
CC
=4.5 V
V
OL
=0.45 V
0
-40 0
85
I
OL
(mA)
1.23
High level output current I
OH
-
Ambient temperature Ta
1.24
Low level output current I
OL
-
Ambient temperature Ta
1.18
High level output voltage V
OH
-
Ambient temperature Ta
Ta (
C)
2.5
2.4
V
CC
=2.5 V
I
OH
=-100
A
-40 0
85
V
OH
(V)
2.3
Ta (
C)
2.7
2.6
V
CC
=2.7 V
I
OH
=-100
A
-40 0
85
V
OH
(V)
2.5
1.17
High level output voltage V
OH
-
Ambient temperature Ta
CMOS SERIAL E
2
PROM
S-29X91A Series
14
Seiko Instruments Inc.
Ta (
C)
3.0
2.0
0
-40
0
85
3.0
1.5
0
1
2
3
4
5
6
Ta=25
C
CS, SK, DI,
PROT
V
CC
(V)
V
INV
(V)
7
V
INV
(V)
V
CC
=5.0 V
CS, SK, DI
PROT
1.27
Input inversion voltage V
INV
-
Ambient temperature Ta
1.26
Input inversion voltage V
INV
-
Power supply voltage V
CC
Ta (
C)
1.0
0.5
V
CC
=1.8 V
V
OL
=0.1 V
0
-40
0
85
I
OL
(mA)
1.25
Low level output current I
OL
-
Ambient temperature Ta
CMOS SERIAL E
2
PROM
S-29X91A Series
Seiko Instruments Inc.
15
2.
AC Characteristics
Ta (
C)
0.6
0.4
V
CC
=1.8 V
-40
0
85
0.2
t
PD
(
s)
2.7
Data output delay time t
PD
-
Ambient temperature Ta
Ta (
C)
0.6
0.4
V
CC
=2.7 V
-40
0
85
0.2
t
PD
(
s)
Ta (
C)
0.3
0.2
V
CC
=4.5 V
-40
0
85
0.1
t
PD
(
s)
2.6
Data output delay time t
PD
-
Ambient temperature Ta
2.5
Data output delay time t
PD
-
Ambient temperature Ta
Ta (
C)
6
4
V
CC
=5.0 V
-40 0
85
2
t
PR
(ms)
Ta (
C)
6
4
V
CC
=3.0 V
-40 0
85
2
t
PR
(ms)
2.3
Program time t
PR
-
Ambient temperature Ta
2.4
Program time t
PR
-
Ambient temperature Ta
10K
2
3
4
5
Ta=25
C
V
CC
(V)
f
max
(Hz)
1
4
2
2
3
4
5 6
7
Ta=25
C
V
CC
(V)
t
PR
(ms)
1
100K
1M
2M
2.1
Maximum operating frequency f
max
-
Power supply voltage V
CC
2.2
Program time t
PR
-
Power supply voltage V
CC
CMOS SERIAL E
2
PROM
S-29X91A Series
16
Seiko Instruments Inc.
n
n
Ordering Information
1.
8-pin DIP
There are two types of packages : A or B.
2.
8-pin SOP
There are two types of packages : A or B.
Package type
A
:
A type
(blank) :
B type
Package
DP: DIP
FJ : SOP1
Product name S-29191A
: 1K-bit
S-29291A
: 2K-bit
S-29391A
: 4K-bit
See
n
Pin Assignment, (Figure 1)
S-29X91A
XX
A type
S-29191AFJA
S-29291AFJA
S-29391AFJA
B type
S-29191AFJ
S-29291AFJ
S-29391AFJ
A type
S-29191ADPA
S-29291ADPA
S-29391ADPA
B type
S-29191ADP
S-29291ADP
S-29391ADP
0.40.05
1.27
0.200.05
4.90(4.95max)
1
4
8
5
8-pin SOP
FJ008-A 990531
2.00.05
1.550.05
4.00.1(10 pitches 40.0 0.2)
0.30.05
2.10.1
8.00.1
6.70.1
2.00.05
5 max.
5
8
1
4
Feed direction
20.5
13.50.5
20.5
130.2
210.8
60
Winding core
Unit:mm
Dimensions
Taping Specifications
Reel Specifications
A type
0.420.09
1.27
0.220.03
4.90(5.00max)
1
4
8
5
8-pin SOP
FJ008-B 990531
2.00.05
1.550.05
1.750.1
4.00.1(10 pitches 40.00.2)
0.30.05
2.10.1
8.00.1
6.70.1
2.00.05
5 max.
3 max.
5
8
1
4
Feed direction
12.00.2
5.50.05
5.550.1
135
20.5
13.50.5
20.5
130.2
210.8
60
801
3302
Winding core
Unit:mm
Dimensions
Taping Specifications
Reel Specifications
B type
DP00 -A 990531
0.50.1
2.54
1.0
1.5
0~15
0.3
+0.1
-0.05
7.62
9.3(9.6max)
8-pin DIP
Unit:mm
Dimensions
A type
0.460.05
2.54
0.99
1.52
1~10
7.87
9.50(9.76max)
0.250.05
DP008-B 990531
8-pin DIP
Dimensions
Unit:mm
B type
8-pin DIP Both type A and B
Markings
990603
29/24C01/08
8-pin SOP Both type A snd B
Numbers 1, 2, 7, 8, and/or 12
include blanks depending on
product type.
Numbers 1, 6, 7, and/or 11 include
blanks depending on product type.
The information herein is subject to change without notice.
Seiko Instruments Inc. is not responsible for any problems caused by circuits or other diagrams
described herein whose industrial properties, patents or other rights belong to third parties. The
application circuit examples explain typical applications of the products, and do not guarantee any
mass-production design.
When the products described herein include Strategic Products (or Service) subject to regulations,
they should not be exported without authorization from the appropriate governmental authorities.
The products described herein cannot be used as part of any device or equipment which influences
the human body, such as physical exercise equipment, medical equipment, security system, gas
equipment, vehicle or airplane, without prior written permission of Seiko Instruments Inc.
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