MC74HC165ANG

Shift Registers Overview

The MC74HC165ANG is an 8-bit parallel-in/serial-out shift register manufactured by onsemi. It operates within a DC supply voltage range of 2.0 to 6.0 V and supports an operating temperature range from -55°C to +125°C. The device features asynchronous parallel loading when the Serial Shift/Parallel Load input is low, and serial shifting occurs on the rising edge of the Clock or Clock Inhibit inputs. It provides complementary outputs (QH and QH) and includes a two-input NOR clock structure for flexible clocking options.

Shift Registers Feature Summary

• Asynchronous parallel data loading capability
• Complementary serial output stages
• Dual independent clock inputs with inhibit function

Shift Registers Applications

• Data acquisition systems requiring parallel-to-serial conversion
• Input expansion for microcontroller-based interfaces
• Keyboard matrix scanning applications

Shift Registers Procurement Notes

Verify that the ordering suffix 'A' corresponds to the specific package variant required, as the datasheet lists SOIC-16, TSSOP-16, and QFN-16 options under the MC74HC165A family. Confirm compliance with JEDEC Standard No. 7A and ensure the component meets RoHS requirements if applicable to the design specifications.

Shift Registers Selection Notes

Select this component when high-speed CMOS logic compatibility is required alongside LSTTL interface capabilities. Ensure the application voltage remains within the 2.0 V to 6.0 V range. Consider the dual clock inputs if noise immunity or complex timing control is necessary for the serial shift operation.

Shift Registers Part Context

This part belongs to the 74HC series of high-speed CMOS logic devices. It is pin-compatible with the LS165 TTL counterpart, facilitating direct upgrades in existing designs. The device utilizes silicon-gate CMOS technology to achieve low power consumption while maintaining high noise immunity characteristics suitable for industrial environments.

Shift Registers Replacement Considerations

MC74HC165ADG

Shift Registers FAQ

How does the clock inhibit function operate?

The Clock and Clock Inhibit pins function identically as a two-input NOR gate. Data shifts only when both inputs are low; setting either input high inhibits the clock signal.

What is the behavior of the Parallel Load input?

When the Serial Shift/Parallel Load input is low, data from the parallel inputs (A-H) is asynchronously loaded into the register regardless of the clock state.