Nexperia USA Inc. 74AHCT595D-Q100,11

Overview

74AHCT595D-Q100 from Nexperia is an automotive-grade 8-bit serial-in/parallel-out shift register with separate shift and storage registers, 3-state outputs, TTL-compatible inputs, and AEC-Q100 Grade 1 qualification (−40 °C to +125 °C). It features asynchronous master reset (MR), dual clocks (SHCP and STCP), serial output (Q7S) for cascading, and output enable (OE) for bus isolation - used in automotive LED driver control and body electronics modules.

For engineers reviewing the 74AHCT595D-Q100 datasheet, 74AHCT595D-Q100 pinout, 74AHCT595D-Q100 application, or 74AHCT595D-Q100 equivalent, key selection criteria include TTL-level input compatibility, 3-state output timing (enable/disable times ≤13 ns at VCC = 5 V), propagation delay ≤11.5 ns (STCP→Qn), and SO16 package suitability for reflow-soldered automotive PCBs.

Technical Context

This device implements a two-stage synchronous logic architecture: an 8-bit shift register accepting serial data on SHCP rising edges, and an independent 8-bit storage latch transferring data on STCP rising edges - enabling simultaneous shift-and-hold operation. The separation allows continuous serial loading while holding stable parallel outputs.

Its TTL-compatible inputs (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V) interface directly with legacy microcontroller GPIOs, while overvoltage tolerance (inputs rated to 5.5 V) supports mixed-voltage system integration without level-shifting circuitry.

Key Specifications

Pinout & Package

74AHCT595D-Q100 uses the SO16 plastic small outline package (SOT109-1), 16-pin, 3.9 mm body width, with gull-wing leads suitable for automated optical inspection and standard reflow profiles.

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 74AHC595D-Q100 and SN74HC595QPWRQ1, the 74AHCT595D-Q100 uniquely balances TTL-level compatibility, sub-12 ns timing at automotive temperature extremes, and proven SO16 reliability in vibration-prone chassis environments.

Availability

74AHCT595D-Q100 is available at Aetrix Electronics and suitable for automotive LED control, body electronics expansion, ADAS sensor configuration, and EPS diagnostic isolation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74AHCT595D-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 global semiconductor expert delivering high-performance, reliable, and energy-efficient components for automotive, industrial, and consumer applications - with leadership in logic, discrete, and MOSFET technologies.

The 74AHCT595-Q100 series belongs to Nexperia's automotive-qualified logic portfolio, designed specifically for robust serial-to-parallel data conversion in harsh-temperature, high-reliability vehicle subsystems.

FAQ

Can 74AHCT595D-Q100 operate with a 3.3 V microcontroller?

No - the 74AHCT595D-Q100 requires VCC = 4.5–5.5 V and has TTL-compatible inputs (VIH ≥ 2.0 V), but its minimum high-level input voltage is specified only down to 2.0 V at 5 V supply. At 3.3 V VCC, VIH is undefined per datasheet; use 74AHC595D-Q100 or level-shifting circuitry instead.

What is the maximum number of 74AHCT595D-Q100 devices that can be cascaded?

There is no hard limit - cascading is constrained only by total propagation delay and clock skew. With typical tpd ≤11.5 ns per stage and 90 MHz max clock, up to 8 devices (64 bits) maintain timing margin at 10 MHz serial clock; longer chains require derated clock rates or careful PCB layout for matched trace lengths.

Does MR reset both shift and storage registers?

No - MR (pin 10) asynchronously resets only the 8-bit shift register (stages 0–7). The storage register and parallel outputs (Q0–Q7) retain their last latched values until the next STCP rising edge, enabling glitch-free output hold during serial reload.

Is the SO16 package RoHS and REACH compliant?

Yes - the 74AHCT595D-Q100 in SOT109-1 (SO16) package is fully RoHS 2011/65/EU and REACH SVHC-compliant, with lead-free terminations and halogen-free molding compound, certified per Nexperia's material declarations and PPAP documentation.