1FEATURES

· Two-Way Asynchronous Communication

Between Data Buses

· PNP Inputs Reduce D-C Loading

· Hysteresis (Typically 400 mV) at Inputs

Improves Noise Margin

DESCRIPTION

These four-data-line transceivers are designed for asynchronous two-way communications between data buses.

SN74LS243 can be used to drive terminated lines down to 133 Ω.

SN54LS243 is characterized for operation over the full military temperature range of –55°C to 125°C.

SN74LS243 is characterized for operation from 0°C to 70°C.