MC74HC165ADR2G

Shift Registers Overview

The MC74HC165ADR2G is an 8-bit parallel-in serial-out shift register manufactured by onsemi using high-performance silicon-gate CMOS technology. It operates within a supply voltage range of 2.0 V to 6.0 V and supports an operating 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 high. It includes two NOR clock inputs for independent clocking or inhibition functions.

Shift Registers Feature Summary

• Supports both asynchronous parallel data loading and serial shifting operations via dedicated control inputs.
• Features dual clock inputs that function as either active-high clocks or clock inhibit signals.
• Provides complementary non-inverted and inverted outputs from the final stage of the shift register.

Shift Registers Applications

• Interfacing parallel input devices to serial communication buses
• Expanding digital input capacity in microcontroller systems
• Keyboard matrix scanning applications

Shift Registers Procurement Notes

Verify the ordering suffix 'R2G' confirms the SOIC-16 tape and reel packaging configuration. Confirm the HC logic family designation matches system voltage requirements between 2.0 V and 6.0 V. Ensure the component meets RoHS compliance standards if required by the manufacturing process specifications.

Shift Registers Selection Notes

Select this component when an 8-bit parallel-to-serial conversion capability is required with CMOS compatibility. The HC series offers broad voltage flexibility compared to HCT variants. Verify that the package type aligns with available PCB footprint constraints and thermal management requirements for the specific application environment.

Shift Registers Part Context

This part belongs to the MC74HC165A family of 8-bit shift registers. It shares pinout compatibility with LS165 devices while offering improved noise immunity and lower power consumption typical of CMOS technology. The device is designed for general-purpose logic applications requiring reliable data shifting and storage capabilities.

Shift Registers Replacement Considerations

MC74HC165ADG (Rail Packaging)

Shift Registers FAQ

How does the Serial Shift/Parallel Load input control data entry?

When this input is low, data from parallel inputs A-H is loaded asynchronously. When high, data enters serially at the SA input on the rising edge of the clock.

What is the function of the Clock Inhibit input?

It acts as a second clock input or can be used to inhibit clocking. To prevent double clocking, it should go high only while the primary clock input is high.