Nexperia USA Inc. 74AHC595PW,118

Overview

74AHC595PW,118 from Nexperia is an 8-bit serial-in/parallel-out shift register with storage latch and 3-state outputs, operating from 2.0 V to 5.5 V supply. It features separate shift (SHCP) and storage (STCP) clocks, asynchronous master reset (MR), and output enable (OE) for bus isolation. Used in LED matrix drivers and microcontroller GPIO expansion where serial-to-parallel conversion and output latching are required.

For engineers reviewing the 74AHC595PW,118 datasheet, 74AHC595PW,118 pinout, 74AHC595PW,118 application, or 74AHC595PW,118 equivalent, key selection criteria include propagation delay (≤10.5 ns at 5 V), overvoltage-tolerant inputs (to 5.5 V), -40 °C to +125 °C operation, TSSOP16 package compatibility, and CMOS-level input thresholds.

Technical Context

The device implements two independent 8-bit registers: a serial shift register accepting data on DS with each SHCP rising edge, and a parallel storage register loaded on STCP rising edge. Outputs Q0–Q7 reflect storage register contents only when OE is LOW; MR asynchronously clears the shift register but not the storage register.

Its dual-clock architecture enables pipeline operation-data can be shifted into the shift register while previous data remains latched and driven on outputs. Input Schmitt triggers improve noise immunity, and overvoltage tolerance allows safe interfacing with 5 V logic even at lower VCC (e.g., 3.3 V).

Key Specifications

Pinout & Package

TSSOP16 plastic thin shrink small outline package (SOT403-1), 16 leads, body width 4.4 mm, 0.65 mm pitch, exposed pad optional (non-electrical).

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,118, the 74AHC595PW,118 offers superior noise immunity and lower static current but requires CMOS-level input drive; versus SN74HC595PWR, it delivers extended temperature support and 100× lower quiescent current for mission-critical embedded systems.

Availability

74AHC595PW,118 is available at Aetrix Electronics and suitable for LED display drivers, microcontroller GPIO expansion, and industrial I/O modules requiring stable component supply across automotive and industrial temperature ranges.

Supply support for 74AHC595PW,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 focused on essential efficiency-enhancing components, delivering high-performance logic, discrete, and MOSFET solutions.

The 74AHC series targets high-speed, low-power CMOS logic applications requiring wide supply range, robust ESD performance, and extended temperature operation - optimized for modern embedded and automotive subsystems.

FAQ

Can 74AHC595PW,118 operate reliably at 3.3 V with 5 V-tolerant inputs?

Yes. The device operates from 2.0 V to 5.5 V and features overvoltage-tolerant inputs rated to 5.5 V regardless of VCC. At VCC = 3.3 V, inputs accept 0–5 V signals without damage or clamping, enabling direct interface with 5 V microcontrollers or sensors while maintaining full logic functionality and timing specs.

What is the functional difference between SHCP and STCP pins?

SHCP (shift clock) controls data entry into the 8-bit shift register on each rising edge; STCP (storage clock) transfers the entire 8-bit content from the shift register to the output latches on its rising edge. This separation allows continuous serial loading while holding stable parallel outputs - critical for glitch-free display or I/O updates.

Does master reset (MR) affect the storage register or only the shift register?

MR affects only the shift register: a LOW on MR asynchronously clears all eight stages of the shift register to zero, but leaves the storage register and parallel outputs (Q0–Q7) unchanged. This allows safe initialization of serial input paths without disrupting currently displayed or latched data.

How does the 3-state output enable (OE) interact with internal register states?

OE controls only the output drivers: when HIGH, Q0–Q7 enter high-impedance state, disconnecting them from the bus; when LOW, they reflect the current contents of the storage register. OE has no effect on the shift register, storage register, or any internal logic states - registers retain their values regardless of OE status.