SN74LS279ANS

Latches Overview

The SN74LS279ANS is a Texas Instruments logic component belonging to the SN54/74LS series. It functions as a quad S-R latch with non-inverting outputs, housed in a 16-pin Small Outline Package (SOIC). The device operates within a supply voltage range of 4.75 V to 5.25 V and supports a propagation delay of 27 ns at 5 V. It features four independent circuits, each with two input lines and one output line. The unit is rated for operation between 0°C and +70°C, drawing a typical operating current of 7 mA.

Latches Feature Summary

• Contains four independent S-R latch circuits within a single package
• Provides non-inverting outputs for direct signal interfacing
• Compatible with standard 5 V TTL logic families

Latches Applications

• Data storage in digital systems
• Address latching in microprocessor interfaces
• General-purpose memory elements in control logic

Latches Procurement Notes

Verify that the ordering suffix 'ANS' corresponds to the SOIC-16 package variant rather than the PDIP-16 configuration found in other SN74LS279 models. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the selected package matches the PCB footprint requirements for surface-mount assembly processes.

Latches Selection Notes

Select this specific part when a surface-mount implementation of the quad S-R latch is required. The SN74LS279ANS provides the same logical functionality as through-hole variants but utilizes an SOIC-16 package suitable for automated placement. Verify that the design accommodates the thermal characteristics and pin pitch associated with small outline packages.

Latches Part Context

This component is part of the widely used SN54/74LS family of logic integrated circuits. The LS designation indicates Low-power Schottky technology, which offers improved speed and power dissipation characteristics compared to standard TTL. The SN74LS279A specifically addresses applications requiring multiple independent latching channels without the need for external gating components.

Latches Replacement Considerations

The SN74LS279ANSR is a tape-and-reel version of the same die in the same SOIC-16 package. Other manufacturers may offer compatible quad S-R latches, but electrical parameters must be verified against the TI datasheet.