MM74HC165N

Shift Registers Overview

The MM74HC165N is an 8-bit parallel-load shift register manufactured by Fairchild Semiconductor. It operates within a supply voltage range of 2.0 V to 6.0 V and features asynchronous parallel data loading capability. The device provides complementary serial outputs (Q7 and Q7 bar) and supports synchronous serial input shifting on clock rising edges. It utilizes a gated or structure for clock inputs, allowing flexible configuration of clock enable functions. The component is housed in a 14-pin DIP package and complies with JEDEC standard no. 7A.

Shift Registers Feature Summary

• Asynchronous parallel load functionality allows immediate data entry from D0 to D7 inputs when the parallel load control is active.

Shift Registers Applications

• Parallel-to-serial data conversion in digital systems
• Expansion of I/O ports via cascading configurations
• Input scanning for keypad or switch matrices

Shift Registers Procurement Notes

Verify that the specific part number matches the original Fairchild Semiconductor manufacturing origin rather than subsequent acquisitions like onsemi. Confirm the package style corresponds to the standard 14-pin dual in-line format. Ensure compliance with relevant environmental standards such as lead-free requirements if specified for the target application.

Shift Registers Selection Notes

Select this component when an 8-bit shift register with true CMOS logic levels is required. It serves as a direct replacement for legacy low-power Schottky TTL devices due to pin compatibility. Consider the operating temperature range and supply voltage constraints to ensure proper signal integrity across the intended operational environment.

Shift Registers Part Context

This device belongs to the 74HC series of high-speed CMOS logic integrated circuits. It is functionally equivalent to other industry-standard 8-bit parallel-load shift registers. The N suffix typically denotes the plastic dual in-line package variant, distinguishing it from surface-mount options like the MTCX version.

Shift Registers Replacement Considerations

Compatible substitutes include the SN74HC165 from Texas Instruments and the MC74HC165AN from ON Semiconductor. These alternatives maintain identical logical operations and pin assignments for direct interchangeability in existing circuit designs.