Nexperia USA Inc. 74VHCT595PW,118

Overview

74VHCT595PW,118 from Nexperia is an 8-bit serial-in/parallel-out shift register with storage latches and 3-state outputs, designed for TTL-level input compatibility (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V). It features separate shift (SHCP) and storage (STCP) clocks, asynchronous master reset (MR), and output enable (OE) control - enabling precise data staging in microcontroller GPIO expansion and LED matrix drivers.

For engineers reviewing the 74VHCT595PW,118 datasheet, 74VHCT595PW,118 pinout, 74VHCT595PW,118 application, or 74VHCT595PW,118 equivalent, this device supports high-speed serial-to-parallel conversion (fmax = 170 MHz at VCC = 5 V), operates across –40 °C to +125 °C, and delivers rail-to-rail 3-state outputs with <10.5 ns propagation delay (CL = 50 pF).

Technical Context

The 74VHCT595PW,118 implements a dual-register architecture: an 8-stage shift register accepting serial data on SHCP rising edges, and a parallel-output storage register loaded on STCP rising edges - decoupling data shifting from output update. Its TTL-compatible inputs eliminate level-shifting in mixed-logic systems.

It integrates Schmitt-trigger action on all inputs for noise immunity, supports cascading via Q7S serial output, and provides active-low asynchronous MR and OE for system-wide reset and bus contention control - critical in multi-device daisy-chained configurations.

Key Specifications

Pinout & Package

TSSOP16 plastic thin shrink small outline package (SOT403-1); 16-pin, 4.4 mm body width, 0.65 mm pitch; RoHS-compliant, lead-free, thermal performance optimized for reflow soldering.

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 SN74HC595PWR and 74LV595PW,118, the 74VHCT595PW,118 uniquely combines TTL-level input compatibility, 170 MHz operation, and industrial temperature range in a compact TSSOP package - making it optimal for high-reliability 5 V embedded control where signal integrity and timing precision are critical.

Availability

74VHCT595PW,118 is available at Aetrix Electronics and suitable for LED matrix drivers, microcontroller GPIO expanders, industrial serial-to-parallel converters, and automotive lighting controllers requiring stable component supply across extended temperature ranges.

Supply support for 74VHCT595PW,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 reliability, efficiency, and scalability for industrial and automotive markets.

The 74VHCT595PW,118 belongs to Nexperia's 74VHCT logic family - engineered for seamless integration into 5 V TTL-compatible systems requiring high-speed, low-power, and wide-temperature serial interface expansion.

FAQ

Can 74VHCT595PW,118 operate at 3.3 V?

No - the 74VHCT595PW,118 is specified only for 4.5–5.5 V operation. Its TTL-compatible inputs require minimum VIH = 2.0 V, but internal logic and output drive are not characterized below 4.5 V. For 3.3 V systems, consider the 74LV595PW,118 or 74LVC595PW,118 instead.

What is the purpose of separate SHCP and STCP clocks?

Separate clocks enable pipelined operation: new serial data can be shifted into the shift register via SHCP while previously shifted data remains held in the storage register and drives outputs. This prevents output glitches during data loading and allows continuous streaming with deterministic update timing on STCP.

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

MR only resets the 8-stage shift register (Q0–Q7S); it has no effect on the storage register or its parallel outputs (Q0–Q7). Outputs retain their last latched state until STCP is pulsed or OE is toggled. This allows safe reset of incoming data without disrupting active outputs.

Is Q7S output synchronized to SHCP or STCP?

Q7S is strictly synchronized to SHCP - it reflects the state of the shift register's MSB on every SHCP rising edge, regardless of STCP activity. This enables reliable daisy-chaining: Q7S from one device feeds DS of the next, forming a synchronous serial pipeline.