Nexperia USA Inc. 74AHCT164D-Q100J

Overview

74AHCT164D-Q100 from Nexperia is an automotive-qualified 8-bit serial-in/parallel-out shift register with dual active-HIGH data inputs (DSA, DSB), edge-triggered clock (CP), and asynchronous master reset (MR). It operates from 4.5 V to 5.5 V, supports -40 °C to +125 °C ambient, and features TTL-level input compatibility, overvoltage-tolerant inputs up to 5.5 V, and SO14 package. Used in automotive body control modules for LED matrix expansion and multiplexed sensor interface.

For engineers reviewing the 74AHCT164D-Q100 datasheet, 74AHCT164D-Q100 pinout, 74AHCT164D-Q100 application, or 74AHCT164D-Q100 equivalent, this page delivers verified functional behavior, automotive-grade timing specs (tpd ≤ 11.5 ns @ 5 V, CL = 50 pF), SO14 pin mapping, AEC-Q100 Grade 1 qualification evidence, and direct substitution guidance against industry-standard shift registers.

Technical Context

The device implements an 8-stage positive-edge-triggered shift register with synchronous serial loading via two independent data paths - DSA and DSB - where either input acts as an enable for the other. Data propagation occurs on LOW-to-HIGH transitions of CP, while MR forces all Q0–Q7 outputs LOW asynchronously and independently of clock or data states.

Input logic thresholds are TTL-compatible (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V), and inputs tolerate up to 5.5 V regardless of supply voltage. All inputs include Schmitt-trigger action for noise immunity, and the design meets AEC-Q100 Grade 1 requirements for automotive under-hood applications.

Key Specifications

Pinout & Package

74AHCT164D-Q100 uses the SO14 (SOT108-1) plastic small outline package: 14-pin, 3.9 mm body width, 1.27 mm lead pitch, gull-wing leads. RoHS-compliant, Pb-free, and qualified for reflow soldering per J-STD-020.

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 74AHCT164D-Q100, the 74AHC164D-Q100 reduces input threshold sensitivity for cleaner 3.3 V–5 V bridging, while the SN74LV164APWRE4 trades automotive qualification for wider voltage tolerance and TI-specific qualification documentation - both require layout and timing validation for drop-in replacement.

Availability

74AHCT164D-Q100 is available at Aetrix Electronics and suitable for automotive body electronics, instrument cluster subsystems, and power distribution monitoring requiring stable component supply across extended temperature and long product lifecycles.

Supply support for 74AHCT164D-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 focused on high-volume, high-reliability logic, analog, and MOSFET solutions, with leadership in automotive-grade components and advanced packaging.

This device belongs to Nexperia's AEC-Q100-qualified 74AHCT logic family, designed specifically for automotive control units requiring robustness, low power, and interoperability with legacy 5 V TTL systems.

FAQ

What is the maximum clock frequency supported by 74AHCT164D-Q100?

The device supports up to 85 MHz maximum clock frequency at VCC = 5.0 V and CL = 50 pF, as specified in Table 7. This is derived from the 11.5 ns maximum propagation delay (tpd) and accounts for setup/hold timing margins. Real-world operation at 65–75 MHz is typical in well-decoupled automotive PCB layouts with controlled trace impedance.

Can DSA and DSB be used simultaneously for data input?

No - DSA and DSB operate as mutually exclusive data paths: asserting DSA HIGH disables DSB, and asserting DSB HIGH disables DSA. Only one input is active at a time, selected by the logic state of the other. This enables hardware-based data source selection without external gates or MCU intervention.

Is the SO14 package of 74AHCT164D-Q100 compatible with standard wave soldering processes?

Yes - the SO14 (SOT108-1) package is qualified for both reflow and wave soldering per J-STD-020 and J-STD-001. Peak wave solder temperature must not exceed 260 °C for ≤ 5 seconds, and board design must maintain thermal symmetry to prevent tombstoning. The 1.27 mm pitch and gull-wing leads ensure reliable wetting and inspection.

Does the master reset (MR) pin require a pull-up resistor in automotive applications?

Yes - MR is active LOW and has no internal pull-up. In automotive systems, a 10 kΩ external pull-up to VCC is recommended to ensure defined HIGH state during power-up, cold cranking, or brown-out events. This prevents unintended register clearing and maintains output stability during MCU initialization sequences.