Nexperia USA Inc. 74HC594DB,112

Overview

74HC594DB,112 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 SSOP16 package. It enables serial-to-parallel data conversion in microcontroller I/O expansion and LED matrix drivers where cascaded output staging and independent clock/reset control are required.

For engineers reviewing the 74HC594DB,112 datasheet, 74HC594DB,112 pinout, 74HC594DB,112 application, or 74HC594DB,112 equivalent, this device supports precise timing-critical data latching via separate SHCP and STCP clocks, offers rail-to-rail output drive (±35 mA per Qn), operates across -40 °C to +125 °C, and integrates input clamp diodes for overvoltage-tolerant interfacing.

Technical Context

The 74HC594DB implements a two-stage pipeline: an 8-bit shift register accepting serial data on DS at each SHCP rising edge, and an 8-bit storage register that captures shift register contents on each STCP rising edge. This decoupled architecture prevents output glitches during ongoing serial loading.

Both registers feature active-low asynchronous reset (SHR and STR), enabling independent clearing without disrupting the other stage. Input clamp diodes allow safe interface to signals exceeding VCC when used with current-limiting resistors - a key enabler for mixed-voltage system interconnects.

Key Specifications

Pinout & Package

74HC594DB,112 uses the SSOP16 (SOT338-1) package: plastic shrink small outline, 16 leads, 5.3 mm body width, 0.65 mm lead pitch. Pin 1 index located at top-left corner with beveled edge marking.

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 74HCT594DB,112, the 74HC594DB offers lower input threshold sensitivity and wider VCC margin; versus SN74HC595PWR, it provides true dual-reset isolation and non-inverted Q7S for seamless cascading - critical for fault-tolerant industrial data paths.

Availability

74HC594DB,112 is available at Aetrix Electronics and suitable for LED display drivers, microcontroller I/O expansion, industrial serial data converters, and remote control holding registers requiring stable component supply across extended temperature ranges.

Supply support for 74HC594DB,112 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 components for automotive, industrial, and consumer applications, with leadership in logic, power MOSFETs, and ESD protection.

The 74HC594DB belongs to Nexperia's 74HC logic family, engineered for low-power, high-noise-immunity digital interfacing in space-constrained and thermally demanding environments.

FAQ

Can 74HC594DB,112 operate reliably at 3.3 V supply?

Yes. The 74HC594DB,112 is fully specified from 2.0 V to 6.0 V, including 3.3 V operation. At VCC = 3.3 V, VIH is guaranteed ≥ 2.31 V and VIL ≤ 0.99 V, ensuring compatibility with standard 3.3 V CMOS outputs. Propagation delay remains ≤ 37 ns (max) at -40 °C to +85 °C.

What is the minimum pulse width required on SHCP and STCP?

At VCC = 4.5 V, the minimum pulse width for both SHCP and STCP is 4 ns (typical) and 20 ns (max) across -40 °C to +125 °C. This ensures reliable edge detection and register transfer even under worst-case process/voltage/temperature conditions.

How does the Q7S output behave during shift register reset (SHR)?

When SHR is pulled LOW, the shift register clears to all zeros, and Q7S immediately goes LOW (not high-impedance). This deterministic state prevents floating signals in daisy-chained configurations and ensures predictable downstream behavior.

Is thermal pad soldering required for the SSOP16 package?

No. The SSOP16 (SOT338-1) package used by 74HC594DB,112 has no exposed thermal pad. Thermal performance relies on PCB copper area connected to pins 8 (GND) and 16 (VCC); no special pad or soldering is needed beyond standard reflow profiles for SSOP components.