SN54ABT245, SN74ABT245A
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS081E – JANUARY 1991 – REVISED JULY 1994
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SN54ABT245 . . . J OR W PACKAGE
SN74ABT245A . . . DB, DW, N, OR PW PACKAGE
(TOP VIEW)
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
SN54ABT245 . . . FK PACKAGE
(TOP VIEW)
OE
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State-of-the-Art EPIC-ΙΙB ™ BiCMOS Design
Significantly Reduces Power Dissipation
ESD Protection Exceeds 2000 V Per
MIL-STD-883C, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
Latch-Up Performance Exceeds 500 mA
Per JEDEC Standard JESD-17
Typical VOLP (Output Ground Bounce)
< 1 V at VCC = 5 V, TA = 25°C
High-Drive Outputs (– 32-mA IOH,
64-mA IOL )
Package Options Include Plastic
Small-Outline (DW), Shrink Small-Outline
(DB), and Thin Shrink Small-Outline (PW)
Packages, Ceramic Chip Carriers (FK),
Ceramic Flat (W) Packages, and Plastic (N)
and Ceramic (J) DIPs
A2
A1
DIR
VCC
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description
These octal bus transceivers are designed for
asynchronous communication between data
buses. The devices 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 device so the
buses are effectively isolated.
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
A3
A4
A5
A6
A7
To ensure the high-impedance state during power
up or power down, OE should be tied to VCC
through a pullup resistor; the minimum value of the
resistor is determined by the current-sinking
capability of the driver.
The SN74ABT245A 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 SN54ABT245 is characterized for operation over the full military temperature range of – 55°C to 125°C. The
SN74ABT245A 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
EPIC-ΙΙB is a trademark of Texas Instruments Incorporated.
Copyright © 1994, 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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