SN54ALS1245A Datasheet, PDF (1/5 Pages) Texas Instruments – OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS

• Bidirectional Bus Transceivers in
High-Density 20-Pin Packages
• Low-Power Versions of ′ALS245 Series
• ′ALS1245 Series Is Identical to ′ALS1645
Series
• Package Options Include Plastic
Small-Outline (DW) Packages, Ceramic
Chip Carriers (FK), and Standard Plastic (N)
and Ceramic (J) 300-mil DIPs
description
These octal bus transceivers are designed for
asynchronous two-way communication between
data buses. These devices transmit 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 SN54ALS1245A is characterized for
operation over the full military temperature range
of – 55°C to 125°C. The SN74ALS1245A is
characterized for operation from 0°C to 70°C.
FUNCTION TABLE
INPUTS
OE DIR
OPERATION
L
L
B data to A bus
L
H
A data to B bus
H
X
Isolation
SN54ALS1245A, SN74ALS1245A
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SDAS245A – DECEMBER 1982 – REVISED JANUARY 1995
SN54ALS1245A . . . J PACKAGE
SN74ALS1245A . . . DW OR N 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
SN54ALS1245A . . . 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
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.
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Copyright © 1995, Texas Instruments Incorporated
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