DM74LS165N

Shift Registers Overview

The DM74LS165N is an 8-bit parallel-in/serial-output shift register manufactured by onsemi. It operates within a supply voltage range of 4.75 V to 5.25 V and supports a maximum clock frequency of 20 MHz under standard loading conditions. The device features direct overriding data inputs, gated clock inputs with a NOR gate structure for clock inhibition, and complementary outputs from the eighth bit. Parallel loading occurs directly upon a HIGH-to-LOW transition of the shift/load input. Propagation delays from load to output range from 35 ns to 42 ns.

Shift Registers Feature Summary

• Parallel-to-serial data conversion capability via eight individual direct data inputs
• Gated clock inputs utilizing a 2-input NOR gate for flexible clocking or inhibition functions
• Complementary outputs provided from the eighth bit stage

Shift Registers Applications

• Parallel-to-serial data conversion in digital systems
• Input expansion for microprocessor-based control circuits
• Data storage and shifting operations in logic applications

Shift Registers Procurement Notes

Verify the manufacturer origin, as this component was originally produced by Fairchild Semiconductor before acquisition by onsemi. Confirm the package type matches the required footprint, specifically the 16-Lead Plastic Dual-In-Line Package (PDIP). Ensure compatibility with the specified operating temperature range of 0°C to +70°C for the intended application environment.

Shift Registers Selection Notes

Select this component when an 8-bit shift register with parallel load capability is required. It is suitable for designs needing complementary outputs and flexible clock control through the gated input structure. Consider the propagation delay specifications and power dissipation characteristics relative to system timing requirements and thermal constraints.

Shift Registers Part Context

This device belongs to the 74LS series of logic integrated circuits, designed for low-power Schottky TTL applications. It provides a solution for managing multiple digital inputs by converting them into a serial stream. The PDIP-16 package facilitates through-hole mounting on printed circuit boards for prototyping and industrial equipment.

Shift Registers Replacement Considerations

Direct replacements include the SN74LS165N from Texas Instruments. Verify pinout compatibility and electrical characteristics against the original datasheet specifications before substitution.