SN54LVTZ245, SN74LVTZ245
3.3-V ABT OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS303C – DECEMBER 1993 – REVISED JANUARY 1996
D
D
D
D
D
D
DIR
A1
A2
A3
A4
A5
A6
A7
A8
GND
1
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
VCC
OE
B1
B2
B3
B4
B5
B6
B7
B8
20
2
11
SN54LVTZ245 . . . FK PACKAGE
(TOP VIEW)
A3
A4
A5
A6
A7
description
4
3 2 1 20 19
18
5
17
6
16
7
15
8
14
9 10 11 12 13
B1
B2
B3
B4
B5
A8
GND
B8
B7
B6
These octal bus transceivers are designed
specifically for low-voltage (3.3-V) VCC operation,
but with the capability to provide a TTL interface
to a 5-V system environment.
OE
D
SN54LVTZ245 . . . J PACKAGE
SN74LVTZ245 . . . DB, DW, OR PW PACKAGE
(TOP VIEW)
State-of-the-Art Advanced BiCMOS
Technology (ABT) Design for 3.3-V
Operation and Low-Static Power
Dissipation
High-Impedance State During Power Up
and Power Down
Support Mixed-Mode Signal Operation (5-V
Input and Output Voltages With 3.3-V VCC)
Support Unregulated Battery Operation
Down to 2.7 V
Typical VOLP (Output Ground Bounce)
< 0.8 V at VCC = 3.3 V, TA = 25°C
Latch-Up Performance Exceeds 500 mA
Per JEDEC Standard JESD-17
Bus-Hold Data Inputs Eliminate the Need
for External Pullup/Pulldown Resistors
Package Options Include Plastic
Small-Outline (DW), Shrink Small-Outline
(DB), and Thin Shrink Small-Outline (PW)
Packages, Ceramic Chip Carriers (FK), and
Ceramic (J) DIPs
A2
A1
DIR
VCC
D
These devices are designed for asynchronous communication between data buses. They transmit data from
the A bus to the B bus or from the B bus to the A bus, depending upon the logic level at the direction-control
(DIR) input. The output-enable (OE) input can be used to disable the devices so the buses are effectively
isolated.
Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.
The SN74LVTZ245 is available in TI’s shrink small-outline package (DB), which provides the same I/O pin count
and functionality of standard small-outline packages in less than half the printed-circuit-board area.
The SN54LVTZ245 is characterized for operation over the full military temperature range of – 55°C to 125°C.
The SN74LVTZ245 is characterized for operation from – 40°C to 85°C.
FUNCTION TABLE
INPUTS
OPERATION
OE
DIR
L
L
B data to A bus
L
H
A data to B bus
H
X
Isolation
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright © 1996, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
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