INDUSTRIAL TEMPERATURE RANGE
IDT74LVCR2245A
3.3V CMOS OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS
1
OCTOBER 1999
INDUSTRIAL TEMPERATURE RANGE
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
1999 Integrated Device Technology, Inc.
DSC-4610/1
FEATURES:
0.5 MICRON CMOS Technology
ESD > 2000V per MIL-STD-883, Method 3015; > 200V using
machine model (C = 200pF, R = 0)
V
CC
= 3.3V 0.3V, Normal Range
V
CC
= 2.7V to 3.6V, Extended Range
CMOS power levels (0.4
W typ. static)
Rail-to-rail output swing for increased noise margin
All inputs, outputs, and I/O are 5V tolerant
Available in SOIC, SSOP, QSOP, and TSSOP packages
FUNCTIONAL BLOCK DIAGRAM
APPLICATIONS:
5V and 3.3V mixed voltage systems
Data communication and telecommunication systems
DRIVE FEATURES:
Balanced Output Drivers: 12mA (B Port)
Low switching noise
IDT74LVCR2245A
DESCRIPTION:
The LVCR2245A octal bus transceiver is built using advanced dual metal
CMOS technology. This device is designed for asynchronous communi-
cation between data buses. The device transmits data from the A bus to the
B bus or from the B bus to the A bus, depending on the logic level at the
direction-control (DIR) input. The output-enable (OE) input can be used to
disable the device so the buses are effectively isolated.
The LVCR2245A has series resistors in the output structure which will
significantly reduce line noise when used with light loads. The driver has
been designed to drive 12mA at the designated threshold.
Inputs can be driven from either 3.3V or 5V devices. This feature allows
the use of this device as a translator in a mixed 3.3V/5V environment.
3.3V CMOS
OCTAL BUS TRANSCEIVER
WITH 3-STATE OUTPUTS
AND 5 VOLT TOLERANT I/O
DIR
A
1
B
1
OE
1
2
19
18
TO SEVEN OTHER CHANNELS
INDUSTRIAL TEMPERATURE RANGE
2
IDT74LVCR2245A
3.3V CMOS OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS
PIN CONFIGURATION
NOTE:
1. As applicable to the device type.
Symbol
Parameter
(1)
Conditions
Typ.
Max.
Unit
C
IN
Input Capacitance
V
IN
= 0V
4.5
6
pF
C
OUT
Output Capacitance
V
OUT
= 0V
5.5
8
pF
C
I/O
I/O Port Capacitance
V
IN
= 0V
6.5
8
pF
CAPACITANCE
(T
A
= +25C, F = 1.0MHz)
Symbol
Description
Max
Unit
V
TERM
Terminal Voltage with Respect to GND
0.5 to +6.5
V
T
STG
Storage Temperature
65 to +150
C
I
OUT
DC Output Current
50 to +50
mA
I
IK
Continuous Clamp Current,
50
mA
I
OK
V
I
< 0 or V
O
< 0
I
CC
Continuous Current through each
100
mA
I
SS
V
CC
or GND
ABSOLUTE MAXIMUM RATINGS
(1)
NOTE:
1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause
permanent damage to the device. This is a stress rating only and functional operation
of the device at these or any other conditions above those indicated in the operational
sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect reliability.
SOIC/ SSOP/ QSOP/ TSSOP
TOP VIEW
NOTE:
1. H = HIGH Voltage Level
X = Don't Care
L = LOW Voltage Level
Inputs
OE
DIR
Outputs
L
L
B Data to A Bus
L
H
A Data to B Bus
H
X
Isolation
FUNCTION TABLE
(1)
Pin Names
Description
OE
Output Enable Input (Active LOW)
Ax, Bx
Data Inputs or 3-State Outputs
DIR
Direction Control Output
PIN DESCRIPTION
2
3
1
A
1
V
CC
16
15
14
B
4
B
3
B
5
B
1
B
2
11
B
7
B
6
B
8
19
18
20
17
13
12
DIR
5
6
A
6
7
A
4
A
5
4
A
2
A
3
8
9
GND
10
A
7
A
8
OE
INDUSTRIAL TEMPERATURE RANGE
IDT74LVCR2245A
3.3V CMOS OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS
3
Symbol
Parameter
Test Conditions
Min.
Typ.
(1)
Max.
Unit
V
IH
Input HIGH Voltage Level
V
CC
= 2.3V to 2.7V
1.7
--
--
V
V
CC
= 2.7V to 3.6V
2
--
--
V
IL
Input LOW Voltage Level
V
CC
= 2.3V to 2.7V
--
--
0.7
V
V
CC
= 2.7V to 3.6V
--
--
0.8
I
IH
Input Leakage Current
V
CC
= 3.6V
V
I
= 0 to 5.5V
--
--
5
A
I
IL
I
OZH
High Impedance Output Current
V
CC
= 3.6V
V
O
= 0 to 5.5V
--
--
10
A
I
OZL
(3-State Output pins)
I
OFF
Input/Output Power Off Leakage
V
CC
= 0V, V
IN
or V
O
5.5V
--
--
50
A
V
IK
Clamp Diode Voltage
V
CC
= 2.3V, I
IN
= 18mA
--
0.7
1.2
V
V
H
Input Hysteresis
V
CC
= 3.3V
--
100
--
mV
I
CCL
Quiescent Power Supply Current
V
CC
= 3.6V
V
IN
= GND or V
CC
--
--
10
A
I
CCH
I
CCZ
3.6
V
IN
5.5V
(2)
--
--
10
I
CC
Quiescent Power Supply Current
One input at V
CC
- 0.6V, other inputs at V
CC
or GND
--
--
500
A
Variation
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Operating Condition: T
A
= 40C to +85C
NOTES:
1. Typical values are at V
CC
= 3.3V, +25C ambient.
2. This applies in the disabled state only.
NOTE:
1. V
IH
and V
IL
must be within the min. or max. range shown in the DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE table for the appropriate V
CC
range.
T
A
= 40C to + 85C.
OUTPUT DRIVE CHARACTERISTICS
Symbol
Parameter
Test Conditions
(1)
Min.
Max.
Unit
V
OH
Output HIGH Voltage
V
CC
= 2.3V to 3.6V
I
OH
= 0.1mA
V
CC
0.2
--
V
V
CC
= 2.3V
I
OH
= 4mA
1.9
--
I
OH
= 6mA
1.7
--
V
CC
= 2.7V
I
OH
= 4mA
2.2
--
I
OH
= 8mA
2
--
V
CC
= 3V
I
OH
= 6mA
2.4
--
I
OH
= 12mA
2
--
V
OL
Output LOW Voltage
V
CC
= 2.3V to 3.6V
I
OL
= 0.1mA
--
0.2
V
V
CC
= 2.3V
I
OL
= 4mA
--
0.4
I
OL
= 6mA
--
0.55
V
CC
= 2.7V
I
OL
= 4mA
--
0.4
I
OL
= 8mA
--
0.6
V
CC
= 3V
I
OL
= 6mA
--
0.55
I
OL
= 12mA
--
0.8
INDUSTRIAL TEMPERATURE RANGE
4
IDT74LVCR2245A
3.3V CMOS OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS
OPERATING CHARACTERISTICS, V
CC
= 3.3V 0.3V, T
A
= 25C
Symbol
Parameter
Test Conditions
Typical
Unit
C
PD
Power Dissipation Capacitance per Transceiver Outputs enabled
C
L
= 0pF, f = 10Mhz
48
pF
C
PD
Power Dissipation Capacitance per Transceiver Outputs disabled
4
SWITCHING CHARACTERISTICS
(1)
V
CC
= 2.7V
V
CC
= 3.3V 0.3V
Symbol
Parameter
Min.
Max.
Min.
Max.
Unit
t
PLH
Propagation Delay
--
7.3
1.5
6.3
ns
t
PHL
Ax to Bx or Bx to Ax
t
PZH
Output Enable Time
--
9.5
1.5
8.2
ns
t
PZL
OE or DIR to Ax or Bx
t
PHZ
Output Disable Time
--
8.5
1.7
7.8
ns
t
PLZ
OE or DIR to Ax or Bx
t
SK
(o)
Output Skew
(2)
--
--
--
1
ns
NOTES:
1. See TEST CIRCUITS AND WAVEFORMS. T
A
= 40C to + 85C.
2. Skew between any two outputs of the same package and switching in the same direction.
INDUSTRIAL TEMPERATURE RANGE
IDT74LVCR2245A
3.3V CMOS OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS
5
Open
V
LOAD
GND
V
CC
Pulse
Generator
D.U.T.
500
500
C
L
R
T
V
IN
V
OUT
(1, 2)
LVC Link
INPUT
V
IH
0V
V
OH
V
OL
t
PLH1
t
SK
(x)
OUTPUT 1
OUTPUT 2
t
PHL1
t
SK
(x)
t
PLH2
t
PHL2
V
T
V
T
V
OH
V
T
V
OL
t
SK
(x)
= t
PLH2
-
t
PLH1
or
t
PHL2
-
t
PHL1
LVC Link
SAME PHASE
INPUT TRANSITION
OPPOSITE PHASE
INPUT TRANSITION
0V
0V
V
OH
V
OL
t
PLH
t
PHL
t
PHL
t
PLH
OUTPUT
V
IH
V
T
V
T
V
IH
V
T
LVC Link
DATA
INPUT
0V
0V
0V
0V
t
REM
TIMING
INPUT
ASYNCHRONOUS
CONTROL
SYNCHRONOUS
CONTROL
t
SU
t
H
t
SU
t
H
V
IH
V
T
V
IH
V
T
V
IH
V
T
V
IH
V
T
LVC Link
LOW-HIGH-LOW
PULSE
HIGH-LOW-HIGH
PULSE
V
T
t
W
V
T
LVC Link
CONTROL
INPUT
t
PLZ
0V
OUTPUT
NORMALLY
LOW
t
PZH
0V
SWITCH
V
LOAD
OUTPUT
NORMALLY
HIGH
ENABLE
DISABLE
SWITCH
GND
t
PHZ
0V
V
OL+
V
LZ
V
OH
V
T
V
T
t
PZL
V
LOAD/2
V
LOAD/2
V
IH
V
T
V
OL
V
OH-
V
HZ
LVC Link
TEST CIRCUITS AND WAVEFORMS
Propagation Delay
Test Circuit for All Outputs
Enable and Disable Times
Set-up, Hold, and Release Times
NOTES:
1. For t
SK
(o) OUTPUT1 and OUTPUT2 are any two outputs.
2. For t
SK
(b) OUTPUT1 and OUTPUT2 are in the same bank.
DEFINITIONS:
C
L
= Load capacitance: includes jig and probe capacitance.
R
T
= Termination resistance: should be equal to Z
OUT
of the Pulse Generator.
NOTES:
1. Pulse Generator for All Pulses: Rate
10MHz; t
F
2.5ns; t
R
2.5ns.
2. Pulse Generator for All Pulses: Rate
10MHz; t
F
2ns; t
R
2ns.
Output Skew - t
SK
(
X
)
Pulse Width
NOTE:
1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH.
Symbol V
CC(1)
= 3.3V0.3V V
CC(1)
= 2.7V
V
CC(2)
= 2.5V0.2V
Unit
V
LOAD
6
6
2 x Vcc
V
V
IH
2.7
2.7
Vcc
V
V
T
1.5
1.5
Vcc
/ 2
V
V
LZ
300
300
150
mV
V
HZ
300
300
150
mV
C
L
50
50
30
pF
TEST CONDITIONS
SWITCH POSITION
Test
Switch
Open Drain
Disable Low
V
LOAD
Enable Low
Disable High
GND
Enable High
All Other Tests
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