Nexperia USA Inc. 74AHCT595PW,112

Overview

74AHCT595PW,112 from Nexperia is an 8-bit serial-in/parallel-out shift register with storage latch and 3-state outputs, designed for serial-to-parallel data expansion in microcontroller I/O-constrained systems. It features separate shift clock (SHCP) and storage clock (STCP), asynchronous master reset (MR), TTL-compatible inputs, and operates from 4.5 V to 5.5 V across –40 °C to +125 °C. Used in LED matrix drivers, GPIO expanders, and industrial control panels.

For engineers reviewing the 74AHCT595PW,112 datasheet, 74AHCT595PW,112 pinout, 74AHCT595PW,112 application, or 74AHCT595PW,112 equivalent, key selection criteria include TTL-level input compatibility, 3-state output enable timing (ten ≤ 13.0 ns at VCC = 5 V), propagation delay (tpd ≤ 11.5 ns), and TSSOP16 thermal performance under continuous 8-output switching.

Technical Context

The device implements two synchronous 8-bit registers: a serial-shift register accepting data on DS with each SHCP rising edge, and a parallel-access storage register loaded on STCP rising edge. Output enable (OE) controls high-impedance state independently of register contents, enabling bus sharing without data corruption.

Its TTL-compatible inputs (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5 V) allow direct interfacing with legacy 5 V logic families, while overvoltage tolerance (up to 5.5 V) supports mixed-voltage system integration. The MR input asynchronously clears only the shift register, preserving storage register contents until next STCP pulse.

Key Specifications

Pinout & Package

TSSOP16 plastic thin shrink small outline package (SOT403-1), 16-pin, 4.4 mm body width, 0.65 mm pitch, exposed pad not electrically connected.

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 74AHCT595PW,112, the 74HC595N,652 trades TTL compatibility for broader voltage flexibility and higher noise immunity, while the SN74LV595AQPWRQ1 adds automotive qualification and lower quiescent current at the expense of cost and non-automotive availability.

Availability

74AHCT595PW,112 is available at Aetrix Electronics and suitable for LED display drivers, microcontroller I/O expansion, and industrial relay controllers requiring stable component supply across automotive and industrial temperature ranges.

Supply support for 74AHCT595PW,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 logic, analog, and MOSFET solutions with focus on efficiency, reliability, and miniaturization.

The 74AHCT595PW,112 belongs to Nexperia's advanced logic family targeting space-constrained, high-reliability embedded systems requiring robust level translation and precise timing control.

FAQ

What is the maximum clock frequency supported by the 74AHCT595PW,112?

The device supports a maximum shift clock (SHCP) and storage clock (STCP) frequency of 90 MHz at VCC = 5.5 V and –40 °C to +125 °C, verified by fmax testing with CL = 50 pF. At 25 °C and VCC = 5 V, typical operation reaches 170 MHz, but design margins require derating for worst-case thermal and capacitive loading conditions.

Can the 74AHCT595PW,112 be used with a 3.3 V microcontroller?

Yes - its overvoltage-tolerant inputs accept up to 5.5 V regardless of VCC, allowing direct connection of 3.3 V MCU GPIOs to DS, SHCP, STCP, MR, and OE. However, VCC must be set to 5 V to ensure TTL-compatible VIH/VIL thresholds and full output drive strength (±8 mA).

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

MR only resets the internal 8-bit shift register to zero; it has no effect on the storage register contents or the parallel outputs (Q0–Q7). Outputs remain unchanged unless OE is asserted or STCP triggers a new load. This allows safe initialization of serial data flow without disrupting currently displayed or controlled states.

Is the TSSOP16 package (SOT403-1) lead-free and RoHS compliant?

Yes - the 74AHCT595PW,112 uses a lead-free, halogen-free, RoHS-compliant TSSOP16 package per Nexperia's product compliance documentation. The SOT403-1 outline meets JEDEC MO-153 standards and supports standard reflow soldering profiles including IPC/JEDEC J-STD-020.