MC74HC165ADG

Shift Registers Overview

The MC74HC165ADG is an 8-bit serial or parallel-input/serial-output shift register manufactured by onsemi using high-performance silicon-gate CMOS technology. It operates within a DC supply voltage range of 2.0 to 6.0 V and supports an operating free-air temperature from -55°C to +125°C. The device features asynchronous parallel loading when the Serial Shift/Parallel Load input is low, and serial shifting on the rising edge of the Clock or Clock Inhibit inputs when that control signal is high. It provides complementary outputs (QH and QH) from the final stage.

Shift Registers Feature Summary

• Supports both asynchronous parallel data loading and synchronous serial shifting via dual clock inputs.
• Outputs are directly compatible with standard CMOS, NMOS, and TTL logic families.
• Includes a two-input NOR clock structure allowing independent clock sources or clock inhibit functionality.

Shift Registers Applications

• Converting parallel data streams into serial format for transmission.
• Expanding digital input capacity in microcontroller-based systems.
• Interfacing between TTL/NMOS outputs and High-Speed CMOS inputs.

Shift Registers Procurement Notes

Verify the specific ordering suffix 'DG' corresponds to the SOIC-16 package as defined in the official onsemi documentation. Confirm compliance requirements such as RoHS and Pb-Free status match project specifications. Ensure the source document explicitly lists this exact part number variant to avoid confusion with other package options like TSSOP or QFN.

Shift Registers Selection Notes

Select this component when an 8-bit shift register with wide voltage operation (2.0V to 6.0V) is required. It is suitable for applications needing direct interface to LSTTL loads or standard CMOS outputs. Consider the HC series for general-purpose use rather than HCT if lower voltage operation below 4.5V is necessary.

Shift Registers Part Context

This device belongs to the MC74HC165A family of 8-bit shift registers. It shares pinout compatibility with LS165 devices. The 'D' suffix indicates the SOIC-16 package, while 'G' denotes a lead-free and halogen-free compliant package. It is distinct from the MC74HCT165A, which is restricted to a 4.5V to 5.5V supply range.

Shift Registers Replacement Considerations

MC74HC165ADR2G