74AHCT594D,118

Shift Registers Overview

The Nexperia 74AHCT594D,118 is an 8-bit serial-in, parallel-out shift register with an output storage register. It operates within a supply voltage range of 2.0 V to 5.5 V and utilizes Schmitt-trigger inputs for high noise immunity. The device features independent clocks (SHCP and STCP) and direct overriding clears (SHR and STR) for both the shift and storage registers. It is housed in a 16-lead SO16 plastic small outline package (SOT109-1).

Shift Registers Feature Summary

• Provides separate clocking and clearing controls for the shift and storage registers.
• Includes Schmitt-trigger action on all inputs to tolerate slower signal transitions.
• Features overvoltage tolerant inputs up to 5.5 V for compatibility with mixed-voltage systems.

Shift Registers Applications

• Serial-to-parallel data conversion
• Remote control holding register

Shift Registers Procurement Notes

Verify that the ordering suffix matches the required package type, as the base part number covers multiple options. Confirm the specific temperature grade and logic family variant against the datasheet specifications before finalizing procurement orders to ensure electrical compatibility.

Shift Registers Selection Notes

Select this component when design requirements include independent control over shift and storage operations. The AHCT series provides TTL-compatible input levels while maintaining CMOS performance characteristics. Ensure the application environment supports the specified operating temperature range and voltage constraints.

Shift Registers Part Context

This component belongs to the 74AHC_AHCT594 family, which includes variants such as the 74AHC594 and 74AHCT594. These devices share identical pinouts and functional descriptions but differ in input logic levels. The D,118 designation specifically identifies the SO16 package configuration within this product line.

Shift Registers Replacement Considerations

Direct substitutes include other manufacturers' 74AHCT594 equivalents. Verify pin compatibility and electrical parameters against the official datasheet before substitution.

Shift Registers FAQ

What is the function of the Q7S pin?

Q7S serves as the serial data output, allowing the device to be cascaded with other shift registers for expanding data width.

How are the shift and storage registers controlled?

They utilize separate positive-edge triggered clocks (SHCP for shift, STCP for storage) and active-low direct overriding clear inputs (SHR and STR).