SN74LS640 Datasheet

SN74LS640 Octal Bus Transceivers

SN74LS640, SN74LS641, SN74LS642, SN74LS645 Octal Bus Transceivers These octal bus transceivers are designed for asynchronous two-way communication between data buses. Control function implementation minimizes external timing requirements. These circuits allow data transmission from the A bus to B o.

Features

V 0 25 70 °C IOH Output Current − High −3.0 mA −15 mA IOL Output Current − Low 24 mA GUARANTEED OPERATING RANGES (SN74LS641, SN74LS642) Symbol Parameter Min Typ Max Unit VCC Supply Voltage TA Operating Ambient Temperature Range 4.75 5.0 5.25 V 0 25 70 °C VOH Output Voltage − High IOL Output Current − Low 5.5 V 24 mA 20 1 http://onsemi.com LOW POWER SCHOTTKY MARKING DIAGRAMS SN74LS64xN AWLYYWW 1 PDIP−20 N SUFFIX CASE 738 20 1 LS64y AWLYYWW 1 SOIC−20 DW SUFFIX CASE 751D 20 1 1 1 SOEIAJ−20 M SUFFIX CASE 967 74LS64y AWLYWW x = 0, 1, 2, or 5 y = 0, 1, or 2 .