74AHC594BQ,115

Overview

The Nexperia 74AHC594BQ,115 is an 8-bit serial-in, parallel-out shift register with an output storage register. It operates on a wide supply voltage range from 2.0 V to 5.5 V and features balanced propagation delays. The device includes separate clocks for the shift and storage registers, along with direct overriding clears for both sections. It provides a serial output (Q7S) for cascading purposes and utilizes Schmitt-trigger inputs for high noise immunity.

Feature Summary

• Provides independent clocking and clearing functions for both the shift and storage registers
• Features Schmitt-trigger action on all inputs for enhanced noise immunity
• Includes a dedicated serial output pin to facilitate cascading multiple devices

Applications

• Serial-to-parallel data conversion circuits
• Remote control holding registers
• Cascaded expansion of digital I/O ports

Procurement Notes

Verify the specific ordering suffix matches the DHVQFN16 package configuration required for your design. Confirm that the temperature range specifications align with your operational environment limits. Ensure input voltage levels are compatible with the CMOS logic family requirements defined in the datasheet before finalizing procurement.

Selection Notes

Select this component when a dual-register architecture is needed to isolate data shifting from output updates. The AHC series offers high-speed performance suitable for modern digital systems. Consider the DHVQFN16 package if space-constrained surface-mount assembly is required. Verify power dissipation constraints against the thermal characteristics provided in the documentation.

Part Context

This part belongs to the 74AHC logic family, which is designed as a high-speed silicon-gate CMOS device. It maintains pin compatibility with Low-Power Schottky TTL standards. The BQ suffix specifically denotes the DHVQFN16 package variant, distinguishing it from other physical form factors within the same logical function family.

Replacement Considerations

Check for equivalent parts within the 74AHC594 family that utilize different packages such as SO16 or TSSOP16. Verify that any substitute maintains the same 8-bit shift register functionality and storage register capabilities. Ensure the replacement supports the required supply voltage range and operating temperature specifications.