Nexperia USA Inc. 74AHC595D,112

Overview

74AHC595D,112 from Nexperia is an 8-bit serial-in/parallel-out shift register with storage latch and 3-state outputs, featuring separate shift (SHCP) and storage (STCP) clocks, asynchronous master reset (MR), and output enable (OE). It operates from 2.0 V to 5.5 V, supports cascading via Q7S, and delivers 8 parallel outputs (Q0–Q7) with CMOS-level inputs. Used in LED matrix drivers and microcontroller GPIO expansion where serial-to-parallel conversion and output latching are required.

For engineers reviewing the 74AHC595D,112 datasheet, 74AHC595D,112 pinout, 74AHC595D,112 application, or 74AHC595D,112 equivalent, key selection criteria include propagation delay (≤10.5 ns at 5 V), 3-state output control timing (ten ≤13.0 ns), overvoltage-tolerant inputs (to 5.5 V), and SO16 package compatibility with industrial temperature range (−40 °C to +125 °C).

Technical Context

The device implements a dual-register architecture: an 8-stage shift register accepting serial data on DS with LOW-to-HIGH SHCP transitions, and an independent 8-bit storage register loaded on LOW-to-HIGH STCP edges. Outputs remain stable during shifting due to separation of clock domains.

Output control is fully decoupled from register operation: OE asserts high-impedance state without affecting internal register contents, while MR asynchronously clears only the shift register. Input Schmitt triggers provide noise immunity, and overvoltage tolerance enables mixed-voltage interfacing between 3.3 V controllers and 5 V peripherals.

Key Specifications

Pinout & Package

74AHC595D,112 is housed in a plastic SO16 (SOT109-1) package: 16-pin small outline, 3.9 mm body width, 1.27 mm lead pitch, surface-mount compatible.

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 74AHCT595D,112, the 74AHC595D,112 offers superior noise immunity and mixed-voltage flexibility, while SN74HC595PWR trades robustness for broader supply range and higher static current-making the Nexperia part optimal for modern mixed-signal industrial designs.

Availability

74AHC595D,112 is available at Aetrix Electronics and suitable for LED matrix drivers, microcontroller GPIO expansion, industrial PLC output modules, and remote control holding registers requiring stable component supply across automotive and industrial temperature ranges.

Supply support for 74AHC595D,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 discrete, logic, and MOSFET solutions optimized for efficiency-critical applications.

The 74AHC595 series belongs to Nexperia's advanced logic portfolio, engineered for low-power, high-noise-immunity serial-to-parallel conversion in space-constrained industrial and automotive control systems.

FAQ

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

The minimum HIGH and LOW pulse width for both SHCP and STCP is 5.0 ns at V_CC = 4.5 V to 5.5 V. This specification ensures proper clock edge detection by internal Schmitt-trigger circuitry and guarantees setup/hold timing margins for internal flip-flops, even under worst-case process and temperature conditions.

Can 74AHC595D,112 be used with a 3.3 V microcontroller driving 5 V peripherals?

Yes. All inputs are overvoltage tolerant up to 5.5 V, allowing direct connection of 3.3 V GPIOs (e.g., from an ESP32 or STM32) to DS, SHCP, STCP, MR, and OE. Outputs swing rail-to-rail (0 V to V_CC), so setting V_CC = 5 V enables 5 V-compatible parallel outputs while accepting 3.3 V logic-level clocks and data.

How does the master reset (MR) affect the storage register and outputs?

MR only resets the 8-stage shift register to zero; it has no effect on the storage register contents or the Q0–Q7 output states. Outputs retain their last latched values until STCP triggers a new transfer or OE disables them. This behavior enables independent initialization of serial data paths without disrupting active parallel outputs.

Is cascading multiple 74AHC595D,112 devices supported, and what is the timing impact?

Yes-Q7S provides the serial output for daisy-chaining. Each added stage introduces one SHCP-to-Q7S propagation delay (≤10.5 ns at 5 V). For N devices, total serial load time increases linearly: N × t_{pd(SHCP→Q7S)}. No additional timing constraints apply to STCP, which can be shared across all devices for simultaneous parallel update.