D Operating Voltage Range of 4.5 V to 5.5 V D Low Power Consumption, 80-µA Max ICC D Typical tpd = 11 ns D ±6-mA Output ...
D Operating
Voltage Range of 4.5 V to 5.5 V D Low Power Consumption, 80-µA Max ICC D Typical tpd = 11 ns D ±6-mA Output Drive at 5 V D Low Input Current of 1 µA Max
SN54HCT623 . . . J OR W PACKAGE SN74HCT623 . . . DW OR N PACKAGE
(TOP VIEW)
SN54HCT623, SN74HCT623 OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCLS016C – MARCH 1984 – REVISED MARCH 2003
D Inputs Are TTL-
Voltage Compatible D Lock Bus-Latch Capability D True Logic D High-Current 3-State Outputs Can Drive Up
To 15 LSTTL Loads
SN54HCT623 . . . FK PACKAGE (TOP VIEW)
A2 A1 OEAB VCC OEBA
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
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
A8 GND
B8 B7 B6
description/ordering information
These octal bus transceivers are designed for asynchronous two-way communication between data buses. The control-function implementation allows for maximum flexibility in timing.
The ’HCT623 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 disable the device so that the buses are effectively isolated. The dual-enable configuration gives the transceivers the capability to store data by simultaneously enabling OEAB and OEBA. Each output reinforces its input in this transceiver configuration. When both OEAB and OEBA are enabled and all ...
