Nexperia USA Inc. 74HC595PW,118

Overview

74HC595PW,118 from Nexperia is an 8-bit serial-in/serial-or-parallel-out shift register with separate shift and storage registers, 3-state outputs, asynchronous master reset (MR), and independent SHCP/STCP clocks. It operates from 2.0 V to 6.0 V, supports up to 100 MHz typical shift-out frequency, and functions across –40 °C to +125 °C - widely used in LED matrix drivers and microcontroller GPIO expansion.

For engineers reviewing the 74HC595PW,118 datasheet, 74HC595PW,118 pinout, 74HC595PW,118 application, or 74HC595PW,118 equivalent, key selection criteria include its dual-clock architecture (SHCP for shifting, STCP for latching), OE-controlled 3-state output enable, MR-driven synchronous clear, and TSSOP16 package compatibility with high-density PCB layouts.

Technical Context

The device implements two cascaded 8-bit registers: a serial-input shift register that advances data on SHCP rising edges, and a parallel-output storage register loaded on STCP rising edges - enabling precise timing separation between data capture and output update. This decoupling prevents output glitches during ongoing serial loading.

Its 3-state outputs (enabled by active-low OE) allow direct bus sharing without external logic, while internal input clamp diodes permit safe interfacing with voltages exceeding VCC when used with current-limiting resistors. The MR input asynchronously clears only the shift register, leaving stored outputs unaffected until next STCP.

Key Specifications

Pinout & Package

TSSOP16 plastic thin shrink small outline package (SOT403-1); 16 leads; body width 4.4 mm; lead pitch 0.65 mm; exposed pad not present; RoHS 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 SN74HC595N and 74HCT595PW,118, the 74HC595PW,118 offers superior thermal performance (–40 °C to +125 °C), smaller footprint (TSSOP16), and true CMOS input thresholds - making it optimal for compact, high-reliability embedded systems.

Availability

74HC595PW,118 is available at Aetrix Electronics and suitable for LED matrix drivers, microcontroller GPIO expanders, industrial I/O modules, and automotive body control units requiring stable component supply across extended temperature ranges.

Supply support for 74HC595PW,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 logic, analog, and MOSFET solutions with focus on efficiency, reliability, and miniaturization.

The 74HC595 belongs to Nexperia's standard logic portfolio designed for robust serial-to-parallel conversion in space- and power-constrained embedded systems.

FAQ

What is the difference between SHCP and STCP in the 74HC595PW,118?

SHCP (shift clock) advances serial data through the 8-bit shift register on each rising edge, while STCP (storage clock) copies the current shift register contents into the output latches on its rising edge. This separation allows continuous serial loading without altering outputs until explicitly latched - critical for glitch-free display driving.

Can the 74HC595PW,118 drive LEDs directly without current-limiting resistors?

No - although each Qn output can source/sink up to ±35 mA, direct LED connection risks exceeding absolute maximum ratings due to forward voltage variation and thermal runaway. External current-limiting resistors (typically 150–470 Ω for 5 V operation) are mandatory for reliable, long-term operation.

Is the MR (master reset) pin synchronous or asynchronous?

The MR pin is asynchronous and active-LOW: asserting MR immediately clears the shift register to all zeros, regardless of clock state. However, it does not affect the storage register or output states - those remain unchanged until the next STCP pulse or OE toggle.

Does the 74HC595PW,118 support daisy-chaining, and how is it implemented?

Yes - daisy-chaining is supported via Q7S (serial output) connected to DS (serial input) of the next device. With SHCP and STCP shared across all devices, a single 8×N-bit shift sequence loads N registers, and one STCP pulse simultaneously updates all N×8 outputs - enabling scalable I/O expansion.