74LS243
Description
This four data line transceiver is designed for asynchronous two-way munications between data buses. It can be used to drive terminated lines down to 133Ω.
Features s Two-way asynchronous munication between data buses s PNP inputs reduce DC loading on bus line s Hysteresis at data inputs improves noise margin
Ordering Code:
Order Number DM74LS243M DM74LS243N Package Number M14A N14A Package Description
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram
Function Table
Control Inputs G AB H L H L
I = Input O = Output H = HIGH Logic Level L = LOW Logic Level Note 1: Possibly destructive oscillation may occur if the transceivers are enabled in both directions at once.
Data Port Status GBA H H L L I A O (Note 1) ISOLATED O B I (Note 1)
© 2000 Fairchild...
