74HC594BQX

Shift Registers Overview

The Nexperia 74HC594BQX is an 8-bit serial-in/serial or parallel-out shift register with a storage register, housed in a DHVQFN16 package (SOT763-1). It operates within a supply voltage range of 2.0 V to 6.0 V and supports ambient temperatures from -40 °C to +125 °C. The device features separate clock and reset inputs for both the shift and storage registers, enabling independent control. Data shifts on LOW-to-HIGH transitions of the SHCP input, while transfer to the storage register occurs on STCP transitions. It includes a serial output (Q7S) for cascading and clamp diodes on inputs.

Shift Registers Feature Summary

• Provides synchronous serial input and output capabilities with 8-bit parallel data availability.
• Features independent direct clear and clock controls for both shift and storage registers.
• Includes input clamp diodes allowing interface to voltages exceeding VCC using current limiting resistors.

Shift Registers Applications

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

Shift Registers Procurement Notes

Verify that the ordering suffix 'X' corresponds to the specific tape-and-reel packaging configuration required for automated assembly processes. Confirm the DHVQFN16 package dimensions match the PCB footprint design. Ensure the component meets the specified temperature range requirements for the intended operational environment before finalizing procurement specifications.

Shift Registers Selection Notes

Select this component when a compact surface-mount solution is required for 8-bit data shifting applications. The DHVQFN16 package offers space-saving benefits compared to traditional leaded packages. Consider the wide supply voltage range and high noise immunity characteristics suitable for mixed-signal environments requiring robust CMOS logic performance.

Shift Registers Part Context

This part belongs to the 74HC594 family of 8-bit shift registers with output registers manufactured by Nexperia. It utilizes the DHVQFN16 plastic dual in-line compatible thermal enhanced very thin quad flat package without leads. The device is designed for general-purpose digital logic applications requiring reliable data storage and shifting functions in modern electronic systems.

Shift Registers Replacement Considerations

Direct replacements include other 74HC594 variants in different packages such as 74HC594D (SO16), 74HC594DB (SSOP16), or 74HC594PW (TSSOP16). Verify pin compatibility and package dimensions when substituting with these alternatives to ensure proper board integration.

Shift Registers FAQ

How does the device handle cascading?

The device features a serial output (Q7S) that allows multiple units to be connected in series for expanding data width or creating longer shift registers.

What is the function of the input clamp diodes?

The input clamp diodes enable the use of current limiting resistors to safely interface inputs to voltages that exceed the supply voltage (VCC).