MC74AC620 Datasheet | Motorola Semiconductor

.. MC74AC620 MC74ACT620 Octal Bidirectional Transceiver with 3ĆState Outputs The MC74AC620/74ACT620 octal bus transceiver is designed for asynchronous two-way munication between data buses. The device transmits data from bus A to bus B when T/R = HIGH, or from bus B to bus A when T/R = LOW. The enable input can be used to disable the device so the buses are effectively isolated. - Bidirectional Data Path - A and B Outputs Sink 24 m A/Source - 24 m A - ′ACT620 Has TTL patible Inputs VCC 20 GBA 19 B0 18 B1 17 B2 16 B3 15 B4 14 B5 13 B6 12 B7 11 N SUFFIX CASE 738-03 PLASTIC OCTAL BIDIRECTIONAL TRANSCEIVER WITH 3-STATE OUTPUTS 1 GAB 2 A0 3 A1 4 A2 5 A3 6 A4 7 A5 8 A6 9 A7 10 GND DW SUFFIX CASE 751D-04 PLASTIC PIN NAMES A0- A7 GAB GBA B0- B7 Side A Inputs or 3-State Outputs Enable B Outputs Enable A Outputs Side B Inputs or 3-State Outputs TRUTH TABLE GAB H H L L GBA H H L L Applied Inputs H L H L Valid Direction I/P→O/P A to B A to B B to A B to A Output L H L H H = HIGH Voltage Level L = LOW Voltage Level FACT DATA Data Sheet 4 U . 5-1 .. MC74AC620 MC74ACT620 MAXIMUM RATINGS- Symbol VCC Vin Vout Iin Iout ICC Tstg Parameter DC Supply Voltage (Referenced to GND) DC Input Voltage (Referenced to GND) DC Output Voltage (Referenced to GND) DC Input Current, per Pin DC Output Sink/Source Current, per Pin DC VCC or GND Current per Output Pin Storage Temperature Value - 0.5 to +7.0 - 0.5 to VCC +0.5 - 0.5 to VCC +0.5 ±20 ±50 ±50 - 65 to +150 Unit V V V m A m A m A °C - Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the Remended Operating Conditions. REMENDED OPERATING CONDITIONS Symbol VCC Vin, Vout Supply Voltage DC Input Voltage, Output Voltage (Ref. to GND) VCC @ 3.0 V tr, tf Input Rise and Fall Time (Note 1) ′AC Devices except Schmitt Inputs VCC @ 4.5 V VCC @ 5.5 V tr, tf TJ TA IOH IOL Input Rise and Fall Time (Note 2) ′ACT Devices except Schmitt Inputs Junction Temperature (PDIP)...