Nexperia USA Inc. 74AHC595PW-Q100,11

Overview

74AHC595PW-Q100 from Nexperia is an AEC-Q100 Grade 1 qualified 8-bit serial-in/parallel-out shift register with separate shift and storage registers, 3-state outputs, and asynchronous master reset (MR). It operates from 2.0 V to 5.5 V, supports cascading via Q7S serial output, and delivers ≤10.5 ns propagation delay at 5 V with 50 pF load. It is used in automotive LED driver interfaces and remote control holding registers where deterministic timing and voltage-level translation are required.

For engineers reviewing the 74AHC595PW-Q100 datasheet, 74AHC595PW-Q100 pinout, 74AHC595PW-Q100 application, or 74AHC595PW-Q100 equivalent, key selection criteria include its dual-clock architecture (SHCP/STCP), overvoltage-tolerant inputs (to 5.5 V), TTL-compatible variant availability (74AHCT595PW-Q100), and TSSOP16 package suitability for space-constrained automotive PCBs.

Technical Context

The device implements two independent synchronous registers: an 8-stage shift register clocked by SHCP (LOW-to-HIGH edge) and an 8-bit storage latch clocked by STCP (LOW-to-HIGH edge), enabling pipelined data transfer. Its 3-state outputs are controlled by active-low OE, decoupled from register state - allowing output hold during register updates.

Input logic levels are CMOS-compatible (VIH = 3.85 V min at VCC = 5.5 V; VIL = 1.65 V max), with Schmitt-trigger action on all inputs and overvoltage tolerance up to 5.5 V regardless of VCC. The MR input asynchronously clears only the shift register, leaving the storage register 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 electrically connected.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit shift register applications.

Compared with 74AHCT595PW-Q100, the 74AHC595PW-Q100 offers superior noise immunity and lower dynamic power at 3.3 V operation; versus SN74HC595QPWRQ1, it delivers >3× higher speed and tighter propagation delay matching across temperature - critical for synchronized multi-device LED driving.

Availability

74AHC595PW-Q100 is available at Aetrix Electronics and suitable for automotive LED control, industrial I/O expansion, RKE holding registers, and body control module designs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74AHC595PW-Q100 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 leading semiconductor manufacturer specializing in high-performance, high-reliability logic, analog, and discrete components for automotive, industrial, and consumer markets.

The 74AHC595PW-Q100 belongs to Nexperia's automotive-qualified logic portfolio, designed specifically for robust serial-to-parallel data conversion in safety-critical vehicle subsystems operating across −40 °C to +125 °C.

FAQ

Can 74AHC595PW-Q100 be operated at 3.3 V while interfacing with 5 V peripherals?

Yes. Its inputs are overvoltage tolerant up to 5.5 V regardless of VCC, enabling direct connection to 5 V sensors or microcontrollers without external level shifters. At VCC = 3.3 V, VOH remains ≥2.58 V (IO = −4 mA), ensuring reliable high-level recognition by 5 V CMOS inputs.

What happens to Q0–Q7 outputs when OE is HIGH and STCP is pulsed?

Outputs remain in high-impedance (Z) state - OE overrides all output activity. Pulsing STCP while OE = HIGH transfers data from shift register to storage register internally, but Q0–Q7 stay disabled. Outputs activate only after OE returns LOW, preserving data integrity during configuration.

Is the MR pin truly asynchronous, and does it affect the storage register?

Yes, MR is fully asynchronous and active-LOW. It clears only the shift register stages (Q0–Q7 internal shift path), leaving the storage register and Q0–Q7 output latches unchanged. This allows safe reset of incoming data flow without disrupting currently displayed or driven outputs.

How does cascading work with Q7S, and what timing constraints apply?

Q7S connects to DS of the next device. Data shifted out of Q7 appears at Q7S on the same SHCP edge that loads new data into stage 0. Setup time (tsu = 3.0 ns min at 5 V) must be met between Q7S valid edge and next SHCP rising edge - achievable with proper PCB routing and clock skew management.