SN54ABT640 Datasheet, PDF (1/6 Pages) Texas Instruments – OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS

D State-of-the-Art EPIC-ΙΙB™ BiCMOS Design
Significantly Reduces Power Dissipation
D ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
D Latch-Up Performance Exceeds 500 mA Per
JEDEC Standard JESD-17
D Typical V_OLP (Output Ground Bounce) < 1 V
at V_CC = 5 V, T_A = 25°C
D High-Drive Outputs (–32-mA I_OH,
64-mA I_OL )
D Package Options Include Plastic
Small-Outline (DW), Shrink Small-Outline
(DB), and Thin Shrink Small-Outline (PW)
Packages, Ceramic Chip Carriers (FK), and
Plastic (N) and Ceramic (J) DIPs
SN54ABT640, SN74ABT640
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS104C – FEBRUARY 1991 – REVISED JANUARY 1997
SN54ABT640 . . . J PACKAGE
SN74ABT640 . . . DB, DW, N, 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
SN54ABT640 . . . FK PACKAGE
(TOP VIEW)
description
The ’ABT640 bus transceivers are designed for
asynchronous communication between data
buses. These devices transmit inverted data from
the A bus to the B bus or from the B bus to the
A bus, depending on the level at the direction-
control (DIR) input. The output-enable (OE) input
can be used to disable the device so that the
buses are effectively isolated.
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
To ensure the high-impedance state during power
up or power down, OE should be tied to V_CC
through a pullup resistor; the minimum value of
the resistor is determined by the current-sinking
capability of the driver.
The SN54ABT640 is characterized for operation over the full military temperature range of –55°C to 125°C. The
SN74ABT640 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.
EPIC-ΙΙB is a trademark of Texas Instruments Incorporated.
UNLESS OTHERWISE NOTED this document contains PRODUCTION
DATA information 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.
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Copyright © 1997, Texas Instruments Incorporated
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