SN74LS279ANSR

Latches Overview

The SN74LS279ANSR is a quad S-R latch integrated circuit from the Texas Instruments LS logic series. It features four independent non-inverting latches, each with two inputs and one output, housed in a 16-pin SOIC surface-mount package. The device operates within a supply voltage range of 4.75 V to 5.25 V. Key electrical characteristics include a propagation delay of 27 ns at 5 V, a low-level output current of 32 mA, and a high-level output current of -400 uA. It functions reliably across an operating temperature range of 0°C to +70°C.

Latches Feature Summary

• Contains four independent S-R latches for parallel data storage applications
• Features active-low Set and Reset inputs for direct control of latch states
• Provides non-inverting outputs that maintain the stored logic level until changed

Latches Applications

• Data storage registers in digital systems
• Memory buffer circuits
• Status indication logic

Latches Procurement Notes

Verify the specific suffix 'ANSR' confirms the SOIC-16 surface mount package and tape-and-reel shipping format. Confirm RoHS compliance status as indicated in official documentation. Ensure the component matches the LS logic family specifications for voltage and current requirements before integration into the design.

Latches Selection Notes

Select this component when multiple independent latches are required in a compact surface-mount footprint. The LS series offers standard TTL compatibility with moderate speed. Consider the SOIC-16 package for PCB space efficiency compared to through-hole alternatives while maintaining necessary drive capabilities for standard loads.

Latches Part Context

This part belongs to the SN74LS279A family of quad S-R latches manufactured by Texas Instruments. It is part of the broader 74-series logic ecosystem, specifically utilizing Low-power Schottky (LS) technology. The device serves as a fundamental building block for sequential logic circuits requiring simple set-reset functionality without clock synchronization.

Latches Replacement Considerations

Direct pin-compatible replacements within the same package may include other manufacturers' SN74LS279 variants. Verify logical equivalence and electrical parameters such as propagation delay and output current when substituting.