SN74BCT620A
SN74BCT620A is Octal Bus Transceivers manufactured by Texas Instruments.
description
The ′BCT620A bus transceiver is designed for asynchronous munication between data buses. The control function implementation allows for maximum flexibility in timing. The ′BCT620A provides inverted data at its outputs.
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. 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. In this way, each output reinforces its input in this configuration.
The SN54BCT620A is characterized for operation over the full military temperature range of
- 55°C to 125°C. The SN74BCT620A is characterized for operation from 0°C to 70°C.
A8 GND
B8 B7 B6
SN54BCT620A, SN74BCT620A OCTAL BUS TRANSCEIVERS
WITH 3ĆSTATE OUTPUTS
SCBS001B
- SEPTEMBER 1987
- REVISED NOVEMBER 1993
SN54BCT620A . . . J OR W PACKAGE SN74BCT620A . . . 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 VCC 19 OEBA 18 B1 17 B2 16 B3 15 B4 14 B5 13 B6 12 B7 11 B8
SN54BCT620A . . . FK PACKAGE (TOP VIEW)
A2 A1 OEAB VCC OEBA
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
B data to A bus
B data to A...
