SN74LS243NE4

Buffers, Drivers, Receivers, Transceivers Overview

The SN74LS243NE4 is a quadruple bus transceiver from the Texas Instruments SNxxLS243 series, designed for asynchronous two-way communication between data buses. It features PNP inputs to reduce DC loading and provides hysteresis at the inputs to improve noise margin. The device supports driving terminated lines down to 133 ohms. It operates within a supply voltage range of 4.75 V to 5.25 V and functions in an ambient temperature range of 0 °C to 70 °C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Enables asynchronous two-way communication between data buses
• PNP inputs reduce DC loading on source circuits
• Input hysteresis improves noise margin

Buffers, Drivers, Receivers, Transceivers Applications

• Asynchronous data bus communication
• Driving terminated transmission lines
• Digital logic interface isolation

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify that the ordering suffix NE4 corresponds to the PDIP-14 package with lead finish NIPDAU and RoHS compliance. Confirm the operating temperature range matches the catalog specification of 0 °C to 70 °C. Ensure the component status is Active Production as listed in the Package Option Addendum.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when designing systems requiring bidirectional data transfer with reduced input loading. The LS logic family offers standard propagation delays suitable for general-purpose digital applications. Verify that the required drive capability meets the load resistance specifications for the target bus architecture.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SNxxLS243 family of quadruple bus transceivers manufactured by Texas Instruments. The SN74 variant is characterized for commercial temperature ranges, distinguishing it from the SN54 military-grade counterpart. It utilizes standard TTL-compatible logic levels for interfacing with other components in the 7400 series ecosystem.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74LS243N

Buffers, Drivers, Receivers, Transceivers FAQ

What is the function of the GAB and GBA pins?

These are direction control inputs that determine the signal flow direction between the A and B buses.

How does the device handle input loading?

It uses PNP inputs which significantly reduce DC loading compared to standard TTL inputs.