SN74LS279ADE4

Latches Overview

The SN74LS279ADE4 is a quad S-R latch integrated circuit manufactured by Texas Instruments. It operates within a supply voltage range of 4.75V to 5.25V and features four independent circuits. The device utilizes a 16-pin SOIC package with surface-mount installation. Key electrical parameters 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 µA. It functions as a non-inverting logic component suitable for standard TTL applications.

Latches Feature Summary

• Contains four independent S-R latch circuits for data storage
• Provides non-inverting output polarity for signal integrity
• Supports surface-mount technology via SOIC-16 packaging

Latches Applications

• General-purpose digital data storage
• Input debouncing circuits
• Status latching in control systems

Latches Procurement Notes

Verify the specific suffix 'E4' indicates environmental compliance or manufacturing revision details against the official datasheet. Confirm the SOIC-16 package dimensions match the target PCB footprint. Ensure the operating temperature range meets system requirements. Validate that the LS logic family characteristics align with the design's power and speed constraints before finalizing procurement.

Latches Selection Notes

Select this component when four independent latches are required in a compact surface-mount format. The LS series offers a balance of speed and power consumption suitable for general logic applications. Consider the 27 ns propagation delay for timing analysis. Verify compatibility with existing 5V logic levels and ensure the 32 mA sink capability meets load requirements.

Latches Part Context

This part belongs to the Texas Instruments SN74LS279A series of quad S-R latches. The 'DE4' designation typically denotes a specific tape-and-reel packaging variant with RoHS compliance. It is part of the broader 74LS logic family, designed for standard 5V TTL operation. The component serves as a fundamental building block for sequential logic circuits requiring multiple independent storage elements.

Latches Replacement Considerations

Direct substitutes may include other SN74LS279 variants with compatible pinouts and electrical specifications. Verify package equivalence between DIP and SOIC if form factor changes are acceptable. Cross-reference manufacturer-specific suffixes for packaging and compliance differences.