Nexperia USA Inc. 74AHC594PW-Q100,11

Overview

74AHC594PW-Q100 from Nexperia is an automotive-grade 8-bit serial-in, parallel-out shift register with independent storage register, CMOS-level inputs, 2.0–5.5 V supply range, and AEC-Q100 Grade 1 qualification (−40 °C to +125 °C). It implements dual positive-edge-triggered clocks (SHCP and STCP), active-low asynchronous resets (SHR, STR), and cascading-capable serial output (Q7S), used in automotive lighting control and body electronics for LED driver interface expansion.

For engineers reviewing the 74AHC594PW-Q100 datasheet, 74AHC594PW-Q100 pinout, 74AHC594PW-Q100 application, or 74AHC594PW-Q100 equivalent, key selection criteria include its dual-clock architecture, Schmitt-trigger inputs, overvoltage-tolerant 5.5 V inputs, independent reset capability, and TSSOP16 package suitability for high-density automotive PCBs.

Technical Context

This device integrates two synchronous stages: an 8-bit shift register accepting serial data (DS) on SHCP rising edges, and a separate 8-bit D-type storage register loaded on STCP rising edges. The functional separation enables precise timing control-e.g., shifting new data while holding previous outputs stable until latched.

Both SHR and STR are active-low asynchronous controls, resetting only their respective register domains without affecting the other. Input thresholds follow CMOS logic levels (VIH ≥ 0.7×VCC, VIL ≤ 0.3×VCC), and all inputs tolerate up to 5.5 V regardless of VCC, enabling mixed-voltage system interfacing.

Key Specifications

Pinout & Package

TSSOP16 plastic thin shrink small outline package (SOT403-1), 16 leads, 4.4 mm body width, 0.65 mm pitch, exposed pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74AHCT594PW-Q100, the AHC variant offers tighter VIH/VIL margins at lower VCC but requires cleaner input waveforms; versus SN74HC595QPWRQ1, it provides superior timing control and fault-isolated reset capability essential for automotive functional safety.

Availability

74AHC594PW-Q100 is available at Aetrix Electronics and suitable for automotive LED lighting control, body control module I/O expansion, instrument cluster display driving, and HVAC panel interface requiring stable component supply across extended temperature ranges.

Supply support for 74AHC594PW-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 logic, analog, and MOSFET solutions optimized for automotive, industrial, and consumer applications with emphasis on reliability and AEC-Q100 compliance.

This device belongs to Nexperia's automotive-qualified AHC logic family, designed specifically for robust serial data expansion in harsh-temperature automotive subsystems where timing precision and input noise immunity are critical.

FAQ

Can 74AHC594PW-Q100 operate reliably at 3.3 V supply with 5 V input signals?

Yes. All inputs are overvoltage tolerant up to 5.5 V regardless of VCC, so 5 V logic signals from legacy MCUs or sensors can be directly connected without level shifters. Output VOH/VOL remain valid at 3.3 V, maintaining compatibility with downstream 3.3 V logic.

What is the timing relationship between SHCP and STCP when tied together?

When SHCP and STCP are connected, the shift register advances one bit on each clock edge before the storage register captures it. This causes the newly shifted bit to appear on Q7S but not yet on Q0–Q7 - resulting in a one-cycle pipeline delay between serial input and parallel output update.

How does the Schmitt-trigger action improve noise immunity in automotive environments?

Schmitt-trigger inputs provide ~0.3 V hysteresis on control pins (SHCP, STCP, SHR, STR), preventing false triggering from EMI-induced ringing or slow-rising signals on long harness-connected traces. This eliminates need for external RC filters in body electronics designs.

Is the TSSOP16 package (SOT403-1) compatible with automated optical inspection (AOI)?

No - unlike the DHVQFN16 (SOT763-1) variant, the TSSOP16 package lacks side-wettable flanks. AOI requires solder joint visibility on package edges; TSSOP relies on X-ray or electrical test for post-reflow verification in high-reliability automotive lines.