SN74HC623 - Octal Bus Transceivers With 3-State Outputs

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 ’HC623 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.

OEAB and OEBA\ 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 other data sources to the two sets of bus lines are in the high-impedance state, both sets of bus lines (16 total) remain at their last states. The 8-bit codes appearing on the two sets of buses are identical.

Products containing the "SN74HC623" keyword are: SN74HC623DW , SN74HC623DW , SN74HC623DWR , SN74HC623DWR , SN74HC623DWRE4 , SN74HC623DWRE4 , SN74HC623DWRG4 , SN74HC623N , SN74HC623N , SN74HC623NS , SN74HC623NSR , SN74HC623NSR

• Wide Operating Voltage Range of 2 V to 6 V
• High-Current 3-State Outputs Can Drive Up To 15 LSTTL Loads
• Low Power Consumption, 80-µA Max I_CC
• Typical t_pd = 8 ns
• ±6-mA Output Drive at 5 V
• Low Input Current of 1 µA Max
• Lock Bus-Latch Capability
• True Logic