Nexperia USA Inc. 74HC594D,118

Overview

74HC594D,118 from Nexperia is an 8-bit serial-in/parallel-out shift register with independent shift and storage registers, CMOS-level inputs, 2.0–6.0 V supply range, 100 MHz typical max clock frequency, and SO16 package. It enables serial-to-parallel data conversion in microcontroller I/O expansion and LED matrix drivers.

For engineers reviewing the 74HC594D,118 datasheet, 74HC594D,118 pinout, 74HC594D,118 application, or 74HC594D,118 equivalent, key selection factors include independent SHCP/STCP clocks, active-low SHR/STR reset pins, Q7S cascading capability, and -40 °C to +125 °C operation.

Technical Context

The device implements two synchronous 8-bit 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. This dual-clock architecture decouples data shifting from output latching, enabling glitch-free parallel updates.

Each register has dedicated asynchronous reset (SHR for shift, STR for storage), both active LOW. Input clamp diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors.

Key Specifications

Pinout & Package

74HC594D,118 uses the SO16 (SOT109-1) plastic small outline package: 16-pin, 3.9 mm body width, 1.27 mm pitch, surface-mount, JEDEC MS-012 compliant.

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 74HCT594D,118, the 74HC594D,118 offers superior noise immunity with CMOS inputs but requires ≥3.15 V VIH at 4.5 V VCC; versus SN74HC595DR, it provides deterministic output latching control and true daisy-chain capability essential for scalable I/O expansion.

Availability

74HC594D,118 is available at Aetrix Electronics and suitable for LED display drivers, microcontroller I/O expansion, industrial PLC output modules, and remote control data latching requiring stable component supply across automotive and industrial temperature ranges.

Supply support for 74HC594D,118 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, reliable, and energy-efficient components for automotive, industrial, computing, consumer, and communications markets.

The 74HC594 belongs to Nexperia's HC logic family, designed for low-power, high-noise-immunity digital interfacing in space-constrained and thermally demanding environments.

FAQ

Can 74HC594D,118 operate reliably at 3.3 V?

Yes. The 74HC594D,118 is fully specified from 2.0 V to 6.0 V. At VCC = 3.3 V, VIH(min) = 2.31 V and VOL(max) = 0.33 V (Tamb = -40 °C to +125 °C), ensuring robust compatibility with 3.3 V microcontrollers and FPGAs without level shifting.

What is the purpose of the separate SHR and STR pins?

SHR asynchronously clears only the shift register (stages 0–7), while STR clears only the storage register (Q0–Q7 outputs). This allows independent initialization - e.g., resetting outputs without losing pending serial data, or clearing shift data without affecting displayed content.

How does Q7S enable cascading, and what is its electrical behavior?

Q7S is the serial output of the shift register's final stage. It sources/sinks ±25 mA and matches DS logic levels. Connecting Q7S to DS of the next device creates a seamless 16-bit (or longer) shift chain, synchronized by shared SHCP and STCP signals.

Is the SO16 package RoHS-compliant and lead-free?

Yes. The 74HC594D,118 in SOT109-1 (SO16) package complies with RoHS Directive 2011/65/EU and is lead-free, halogen-free, and qualified to JEDEC J-STD-020 moisture sensitivity level 3 (MSL3) for standard reflow assembly.