Nexperia USA Inc. 74AHC595BQ-Q100,11

Overview

74AHC595BQ-Q100 from Nexperia is an automotive-grade 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 -40 °C to +125 °C ambient range, and features overvoltage-tolerant inputs up to 5.5 V. Used in LED matrix drivers and automotive body control modules for GPIO expansion via SPI-compatible serial interface.

For engineers reviewing the 74AHC595BQ-Q100 datasheet, 74AHC595BQ-Q100 pinout, 74AHC595BQ-Q100 application, or 74AHC595BQ-Q100 equivalent, key selection criteria include dual-clock timing independence (SHCP/STCP), TTL-compatible variants (74AHCT595BQ-Q100), AEC-Q100 Grade 1 qualification, and DHVQFN16 package with side-wettable flanks for AOI-capable solder joint inspection.

Technical Context

This device implements two synchronized but independent 8-bit registers: a serial-shift register clocked by SHCP and a parallel-output storage register clocked by STCP. Data propagates through the shift register on each SHCP rising edge and transfers to the storage register on each STCP rising edge - enabling precise staging of serial load and parallel output update.

Output enable (OE) controls all eight Q0–Q7 outputs in true 3-state logic (active LOW), while MR asynchronously clears only the shift register. Input Schmitt triggers provide high noise immunity, and overvoltage tolerance allows safe interfacing across mixed-voltage domains (e.g., 3.3 V logic driving 5 V loads).

Key Specifications

Pinout & Package

DHVQFN16 package (SOT763-1): 2.5 × 3.5 × 0.85 mm body, no leads, 16 terminals, side-wettable flanks for automated optical inspection (AOI) of solder joints. Thermal-enhanced construction supports sustained operation at +125 °C ambient.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74AHCT595BQ-Q100, the 74AHC595BQ-Q100 offers superior noise immunity and wider voltage margin; versus SN74HC595QPWRQ1, it delivers higher speed and manufacturable AOI-ready packaging - critical for zero-defect automotive assembly.

Availability

74AHC595BQ-Q100 is available at Aetrix Electronics and suitable for automotive body control modules, LED matrix displays, industrial PLC I/O expansion, and HVAC panel interfaces requiring stable component supply across extended temperature ranges and AEC-Q100 compliance.

Supply support for 74AHC595BQ-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 essential efficiency technologies, delivering high-performance logic, discrete, and MOSFET solutions optimized for automotive, industrial, and computing applications.

The 74AHC595BQ-Q100 belongs to Nexperia's automotive-qualified logic portfolio, designed specifically for robust serial-to-parallel data conversion in harsh environments where reliability, thermal stability, and AEC-Q100 conformance are mandatory.

FAQ

What is the purpose of having separate SHCP and STCP clocks?

Separate SHCP and STCP clocks enable pipelined operation: serial data can be loaded into the shift register while previously loaded data remains latched and actively driving outputs. This eliminates output glitches during data loading and supports continuous streaming - essential for real-time LED animation and industrial control timing.

Can the 74AHC595BQ-Q100 drive LEDs directly?

Yes - each Q0–Q7 output sources/sinks up to ±25 mA (per Absolute Maximum Ratings), sufficient for driving standard 20 mA LEDs with appropriate series resistors. However, total device current must remain ≤75 mA (ICC limit), so simultaneous full-brightness drive of all 8 outputs requires careful current budgeting.

How does the MR (master reset) pin behave during normal operation?

MR is asynchronous and active LOW; asserting MR clears only the shift register (stages 0–7), leaving the storage register and Q0–Q7 outputs unchanged until the next STCP pulse. This allows safe initialization of serial data flow without disrupting currently displayed or controlled outputs.

Is the exposed thermal pad on the DHVQFN16 package required to be soldered?

No - the exposed pad (terminal 1 index area) has no electrical or mechanical requirement to be soldered. If connected, it must remain floating or tied to GND; it is not internally bonded to any circuit node. Thermal performance relies on the 16 perimeter terminals, not the pad.