datasheets 74ls623 free download

File name 74ls623.pdf

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 OCTAL BUS TRANSCEIVER implementation allows maximum timing flexibility. Enable inputs may be used WITH 3-STATE OUTPUT 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 LOW POWER SCHOTTKY 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. J SUFFIX CERAMIC CASE 732-03 20 1 CONNECTION DIAGRAM (TOP VIEW) ENABLE N SUFFIX VCC GBA B1 B2 B3 B4 B5 B6 B7 B8 PLASTIC 20 19 18 17 16 15 14 13 12 11 CASE 738-03 20 1 DW SUFFIX SOIC 20 CASE 751D-03 1 2 3 4 5 6 7 8 9 10 1 ENABLE A1 A2 A3 A4 A5 A6 A7 A8 GND GAB BLOCK DIAGRAM ORDERING INFORMATION