Nexperia USA Inc. 74HC594PWJ

Overview

74HC594PWJ from Nexperia is an 8-bit serial-in/parallel-out shift register with independent shift and storage registers, dual clock inputs (SHCP and STCP), and active-low reset pins (SHR, STR). It operates from 2.0 V to 6.0 V, supports 100 MHz typical clock frequency, and delivers parallel outputs Q0–Q7 plus serial output Q7S for cascading. Used in LED matrix drivers and remote control holding registers where synchronized data latching and low-power CMOS logic are required.

For engineers reviewing the 74HC594PWJ datasheet, 74HC594PWJ pinout, 74HC594PWJ application, or 74HC594PWJ equivalent, this page provides verified functional architecture, TSSOP16 package mapping, timing-critical setup/hold values, and validated alternatives for serial-to-parallel conversion in industrial control and display interfaces.

Technical Context

The device implements two synchronous 8-stage registers: a shift register accepting serial data on DS at SHCP rising edges, and a storage register capturing shift register contents on STCP rising edges-enabling glitch-free output updates. Independent SHR and STR allow selective clearing without affecting the other register.

Input clamping diodes permit interface to voltages exceeding VCC when used with current-limiting resistors. Logic levels comply with CMOS thresholds (VIH ≥ 0.7×VCC, VIL ≤ 0.3×VCC) and support operation across -40 °C to +125 °C ambient temperature.

Key Specifications

Pinout & Package

TSSOP16 plastic thin shrink small outline package (SOT403-1), 16-pin, body width 4.4 mm, 0.65 mm pitch, exposed pad optional (non-electrical).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit serial-in/parallel-out shift register applications.

Compared with 74HC164PW and SN74LV595APW, the 74HC594PWJ uniquely provides independent shift/storage registers and dual reset controls - essential for applications demanding output stability during serial data loading and robust fault recovery.

Availability

74HC594PWJ is available at Aetrix Electronics and suitable for LED matrix drivers, industrial I/O expanders, remote control decoder interfaces, and test fixture signal generators requiring stable component supply across extended temperature ranges.

Supply support for 74HC594PWJ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Nexperia is a global semiconductor expert delivering high-performance logic, discrete, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in automotive, industrial, and consumer applications.

The 74HC594 belongs to Nexperia's HC logic family, designed specifically for low-power, high-noise-immunity serial-to-parallel conversion in space- and power-constrained embedded systems operating across wide temperature ranges.

FAQ

What is the maximum clock frequency supported by the 74HC594PWJ?

The 74HC594PWJ supports a maximum shift clock (SHCP) frequency of 100 MHz typical at VCC = 6.0 V and 25 °C, with minimum guaranteed frequency of 24 MHz at VCC = 4.5 V and -40 °C to +125 °C. Propagation delays scale inversely with supply voltage - e.g., tpd = 30 ns at VCC = 4.5 V, 26 ns at VCC = 6.0 V.

Can the 74HC594PWJ be used with a 3.3 V microcontroller?

Yes - the 74HC594PWJ operates down to 2.0 V and meets CMOS input thresholds at 3.3 V (VIH ≥ 2.31 V, VIL ≤ 0.99 V). Its outputs swing rail-to-rail, providing VOH ≥ 3.15 V and VOL ≤ 0.26 V at IO = ±6 mA, ensuring reliable interfacing with 3.3 V MCU GPIOs without level shifters.

How does the dual-register architecture prevent output glitches?

By separating shift and storage functions, the 74HC594PWJ allows serial data to load into the shift register on SHCP edges while outputs remain frozen on Q0–Q7. Only on STCP rising edge does the entire 8-bit word transfer to the output latches - eliminating partial updates and ensuring atomic output changes critical for driving LEDs or relays.

Is the exposed pad on the TSSOP16 package electrically connected?

No - the exposed pad on SOT403-1 (TSSOP16) is non-electrical per Nexperia's package drawing. It may be left floating or connected to VCC for improved thermal conduction, but no electrical connection is required or specified. Soldering it to ground or other nets violates the mechanical specification and risks thermal stress.