SN74LVTZ245 Datasheet, PDF (1/11 Pages) Texas Instruments – 3.3-V ABT OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS

SN54LVTZ245, SN74LVTZ245
3.3ĆV ABT OCTAL BUS TRANSCEIVERS
WITH 3ĆSTATE OUTPUTS
SCBS303C − DECEMBER 1993 − REVISED JANUARY 1996
D State-of-the-Art Advanced BiCMOS
Technology (ABT) Design for 3.3-V
Operation and Low-Static Power
Dissipation
D High-Impedance State During Power Up
and Power Down
D Support Mixed-Mode Signal Operation (5-V
Input and Output Voltages With 3.3-V V_CC)
D Support Unregulated Battery Operation
Down to 2.7 V
D Typical V_OLP (Output Ground Bounce)
< 0.8 V at V_CC = 3.3 V, T_A = 25°C
D Latch-Up Performance Exceeds 500 mA
Per JEDEC Standard JESD-17
D Bus-Hold Data Inputs Eliminate the Need
for External Pullup/Pulldown Resistors
D 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
description
These octal bus transceivers are designed
specifically for low-voltage (3.3-V) V_CC operation,
but with the capability to provide a TTL interface
to a 5-V system environment.
SN54LVTZ245 . . . J PACKAGE
SN74LVTZ245 . . . DB, DW, OR PW PACKAGE
(TOP VIEW)
DIR ₁
A1 ₂
A2 3
A3 4
A4 5
A5 6
A6 7
A7 8
A8 9
GND 10
20 ^V_CC
19 ^OE
18 B1
17 B2
16 B3
15 B4
14 B5
13 B6
12 B7
11 B8
SN54LVTZ245 . . . FK PACKAGE
(TOP VIEW)
A3
3 2 1 20 19
4
18
B1
A4 ₅
17 ^B2
A5 6
16 B3
A6 7
15 B4
A7 8
14 B5
9 10 11 12 13
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
OE DIR
OPERATION
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.
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.
Copyright  1996, Texas Instruments Incorporated
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
• POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
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