SN74LS279D

Latches Overview

The SN74LS279D is a quad S-R latch manufactured by Texas Instruments, not onsemi. It features four independent latches with non-inverting outputs. The device operates within a supply voltage range of 4.75V to 5.25V and supports propagation delays of approximately 22ns to 27ns at 5V. It provides low-level output currents up to 32mA and high-level output currents of -400µA. The component is housed in a 16-pin DIP package and functions within an operating temperature range of 0°C to 70°C.

Latches Feature Summary

• Contains four independent S-R latches for data storage applications
• Features two latches with dual set inputs for flexible control configurations
• Provides non-inverting outputs compatible with standard logic families

Latches Applications

• Data storage registers in digital systems
• Input debouncing circuits
• Memory buffer stages

Latches Procurement Notes

Verify the manufacturer designation carefully, as the SN74LS279D part number is primarily associated with Texas Instruments. Confirm that the specific variant matches your required pinout and electrical specifications before procurement. Ensure the supplier provides official datasheets to validate performance parameters against your design requirements.

Latches Selection Notes

Select this component when multiple independent latching functions are required in a single package. Consider the LS series characteristics regarding power consumption and speed relative to other logic families. Verify compatibility with existing system voltage levels and interface requirements to ensure proper signal integrity across the circuit.

Latches Part Context

This component belongs to the standard 74LS logic family, widely used in general-purpose digital electronics. It serves as a fundamental building block for sequential logic circuits requiring state retention. The device complements other logic gates and flip-flops in complex digital designs.

Latches Replacement Considerations

Compatible substitutes include the SN74LS279N from Texas Instruments and equivalent parts from other manufacturers such as National Semiconductor or STMicroelectronics. Verify pin compatibility and electrical specifications before substitution.