SN54LS623

SN54/74LS623 OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUT The SN54 / 74LS623 series is an octal bus transceiver designed for asynchronous two-way communication between data buses. Control function implementation allows maximum timing flexibility. Enable inputs may be used to disable the device so that buses are effectively isolated. Depending on the Logic Levels at the enable inputs, Data transmission is allowed from the A bus to the B bus or from the B bus to the A bus. The dual-enable configuration gives the LS623 the capability to store data by simultaneous enabling of GBA and GAB. Each output reinforces its input in this transceiver configuration. Thus, when both control inputs are enabled all other data sources to the two sets of bus lines (16 in all) will remain at their last states. OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUT LOW POWER SCHOTTKY 20 J SUFFIX CERAMIC CASE 732-03 1 CONNECTION DIAGRAM (TOP VIEW) ENABLE VCC GBA B1 20 19 18 B2 17 B3 16 B4 15 B5 14 B6 13 B7 12 B8 11 20 N SUFFIX PLASTIC CASE 738-03 1 20 DW SUFFIX SOIC CASE 751D-03 1 1 2 ENABLE A1 GAB 3 A2 4 A3 5 A4 6 A5 7 A6 8 A7 9 A8 10 GND BLOCK DIAGRAM 1/4 LS623 GBA GAB ORDERING INFORMATION SN54LSXXXJ Ceramic SN74LSXXXN Plastic SN74LSXXXDW SOIC A1 B1 FUNCTION TABLE A2 B2 ENABLE INPUTS GBA L H TO OTHER SIX TRANSCEIVERS H L GAB L H L H OPERATION LS623 B data to A bus A data to B bus Isolation B data to A bus, A data to B bus H = HIGH Level, L = LOW Level, X = Irrelevant FAST AND LS TTL DATA 5...