54F623

Local Bus-Latch Capability Noninverting Logic Package Options Include Plastic Small-Outline Packages, Ceramic Chip Carriers, and Standard Plastic and Ceramic 300-mil DIPs description These octal bus transceivers are designed for asynchronous communication between data buses. The control function implementation allows for maximum flexibility in timing. 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. Each output reinforces its input in this configuration. 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. The SN54F623 is characterized for operation over the full military temperature range of – 55°C to 125°C. The SN74F623 is characterized for operation from 0°C to 70°C. A8 GND B8 B7 B6 SN54F623, SN74F623 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SDFS087 – MARCH 1987 – REVISED OCTOBER 1993 SN54F623 . . . J PACKAGE SN74F623 . . . 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 SN54F623 . . . FK ...