SN54F623_16 Datasheet, PDF (1/13 Pages) Texas Instruments – OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS

• Local Bus-Latch Capability
• Noninverting Logic
• Package Options Include Plastic
Small-Outline Packages, Ceramic Chip
Carriers, and Standard Plastic and Ceramic
300-mil DIPs
description
These octal bus transceivers are designed for
asynchronous communication between data
buses. The control function implementation allows
for maximum flexibility in timing.
These devices allow data transmission from the A
bus to the B bus or from the B bus to the A bus
depending upon the logic levels at the output
enable (OEAB and OEBA) inputs.
The output-enable inputs can be used to disable
the device so that the buses are effectively
isolated. The dual-enable configuration gives the
transceivers the capability of storing data by
simultaneously enabling OEAB and OEBA. Each
output reinforces its input in this configuration.
When both OEAB and OEBA are enabled and all
other data sources to the two sets of bus lines are
at high impedance, both sets of bus lines (16 in all)
will remain at their last states.
The SN54F623 is characterized for operation over
the full military temperature range of – 55°C to
125°C. The SN74F623 is characterized for
operation from 0°C to 70°C.
SN54F623, SN74F623
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SDFS087 – MARCH 1987 – REVISED OCTOBER 1993
SN54F623 . . . J PACKAGE
SN74F623 . . . DW OR N PACKAGE
(TOP VIEW)
OEAB 1
A1 2
A2 3
A3 4
A4 5
A5 6
A6 7
A7 8
A8 9
GND 10
20 V_CC
19 OEBA
18 B1
17 B2
16 B3
15 B4
14 B5
13 B6
12 B7
11 B8
SN54F623 . . . FK PACKAGE
(TOP VIEW)
3 2 1 20 19
A3 4
18 B1
A4 5
17 B2
A5 6
16 B3
A6 7
15 B4
A7 8
14 B5
9 10 11 12 13
FUNCTION TABLE
INPUTS
OEBA OEAB
OPERATION
L
L
B data to A bus
L
H
B data to A bus,
A data to B bus
H
L
Isolation
H
H
A data to B bus
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 © 1993, Texas Instruments Incorporated
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