Nexperia USA Inc. 74AHC164BQ-Q100X

Overview

74AHC164BQ-Q100 from Nexperia is an automotive-qualified 8-bit serial-in/parallel-out shift register with dual active-HIGH data inputs (DSA, DSB), eight buffered CMOS-level outputs (Q0–Q7), master reset (MR, active LOW), and edge-triggered clock (CP, LOW-to-HIGH). It operates from 2.0 V to 5.5 V across –40 °C to +125 °C and features overvoltage-tolerant inputs up to 5.5 V. Used in automotive body control modules for LED matrix expansion and multiplexed sensor interface.

For engineers reviewing the 74AHC164BQ-Q100 datasheet, 74AHC164BQ-Q100 pinout, 74AHC164BQ-Q100 application, or 74AHC164BQ-Q100 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, DHVQFN14 package with side-wettable flanks for AOI, dual-input data gating logic, and guaranteed propagation delay ≤11.5 ns at 5 V/50 pF load.

Technical Context

This shift register implements a synchronous 8-stage positive-edge-triggered shift register with asynchronous active-LOW master reset. Data enters serially via either DSA or DSB, with the other input acting as an enable-both must be HIGH for valid data capture. The internal structure uses eight cascaded D flip-flops with common clock and reset, enabling precise timing control in daisy-chained configurations.

Input Schmitt-trigger action ensures noise immunity on DSA, DSB, CP, and MR; overvoltage tolerance (up to 5.5 V) allows interoperability between 3.3 V and 5 V domains without level shifters. Output drive strength is ±8 mA at VCC = 4.5 V, supporting direct connection to LEDs or logic loads in automotive lighting and display subsystems.

Key Specifications

Pinout & Package

DHVQFN14 (SOT762-1) package: 2.5 × 3.0 × 0.85 mm body, no leads, 14 terminals with exposed thermal pad (non-electrical, optional GND connection), side-wettable flanks for automated optical inspection.

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 74AHCT164BQ-Q100, the 74AHC164BQ-Q100 offers superior noise immunity and lower input threshold variation across voltage; versus SN74LV164AQPWRQ1, it provides AEC-Q100-compliant DHVQFN packaging essential for space-constrained automotive PCBs.

Availability

74AHC164BQ-Q100 is available at Aetrix Electronics and suitable for automotive LED driver designs, body control module I/O expansion, instrument cluster backlight control, and sensor multiplexing requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74AHC164BQ-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 logic, analog, and discrete components, with deep expertise in automotive-grade reliability and high-volume manufacturing.

The 74AHC164BQ-Q100 belongs to Nexperia's AEC-Q100-qualified logic portfolio, designed specifically for automotive body electronics, lighting, and infotainment systems demanding robustness, low power, and precise timing control.

FAQ

What is the maximum clock frequency supported by the 74AHC164BQ-Q100?

The 74AHC164BQ-Q100 supports a maximum clock frequency of 85 MHz at VCC = 4.5 V and CL = 50 pF, verified across –40 °C to +125 °C. At 3.3 V and 15 pF load, fmax reaches 125 MHz. These values derive from measured propagation delay (tpd ≤ 11.5 ns) and setup/hold time margins specified in the Rev. 4 datasheet.

Can DSA and DSB be used simultaneously for data input?

No - DSA and DSB are not parallel data inputs. They operate as a gated pair: one serves as the serial data path while the other acts as an active-HIGH enable. For example, when DSB = HIGH, data on DSA is shifted in on each CP rising edge; if DSB = LOW, DSA is ignored regardless of its state.

Is the exposed thermal pad on the DHVQFN14 package electrically connected?

No - the exposed pad (terminal 1 index area) is not electrically connected to any internal node. Per Nexperia SOT762-1 specification, it may remain floating or be connected to GND for thermal enhancement, but no electrical requirement exists. Soldering it to GND improves thermal resistance by ~15 °C/W.

How does the master reset (MR) interact with the clock (CP) input?

MR is asynchronous and dominant: a LOW on MR forces all Q0–Q7 outputs LOW immediately, overriding any ongoing shift operation or CP activity. The register remains cleared until MR returns HIGH, after which normal clocked shifting resumes on the next CP rising edge.