SN74LS640
SN74LS640 is Octal Bus Transceivers manufactured by onsemi.
SN74LS640, SN74LS641, SN74LS642, SN74LS645
Octal Bus Transceivers
These octal bus transceivers are designed for asynchronous two-way munication between data buses. Control function implementation minimizes external timing requirements. These circuits allow data transmission from the A bus to B or from the B bus to A bus depending upon the logic level of the direction control (DIR) input. Enable input (G) can disable the device so that the buses are effectively isolated.
DEVICE LS640 LS641 LS642 LS645
OUTPUT 3-State Open-Collector Open-Collector 3-State
LOGIC Inverting
True Inverting
True
CONTROL INPUTS
FUNCTION TABLE OPERATION
LS640 LS642
LS641 LS645
B data to A...
