Nexperia USA Inc. 74LVC594ABQ-Q100X

Overview

74LVC594ABQ-Q100 from Nexperia is an automotive-grade 8-bit serial-in/parallel-out shift register with separate shift and storage registers, dual clock inputs (SHCP and STCP), active-low reset pins (SHR and STR), Schmitt-trigger inputs, IOFF partial power-down support, and operates from 1.2 V to 3.6 V supply. It enables cascaded serial-to-parallel data conversion in automotive body control modules requiring robust timing and mixed-voltage interfacing.

For engineers reviewing the 74LVC594ABQ-Q100 datasheet, 74LVC594ABQ-Q100 pinout, 74LVC594ABQ-Q100 application, or 74LVC594ABQ-Q100 equivalent, this device is selected for automotive serial data latching where AEC-Q100 Grade 1 qualification, 125 °C operation, overvoltage-tolerant 5.5 V inputs, and DHVQFN16 side-wettable-flank packaging are required.

Technical Context

The device implements two synchronized but independently controlled 8-bit registers: a shift register accepting serial data on SHCP rising edges and a storage register capturing parallel outputs on STCP rising edges. Cascading is enabled via Q7S output feeding DS of the next stage.

Its IOFF circuitry disables outputs during power-down to prevent backflow current, while Schmitt-trigger inputs tolerate slow-rising signals in noisy automotive environments. The dual reset architecture allows independent clearing of shift or storage registers without disturbing the other.

Key Specifications

Pinout & Package

DHVQFN16 package (SOT763-1), 2.5 × 3.5 × 0.85 mm body, side-wettable flanks for AOI-compatible solder joint inspection, no leads, 16 terminals, thermal-enhanced quad flat construction.

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 SN74LV8154IPWREP, the 74LVC594ABQ-Q100 offers AEC-Q100 compliance, IOFF, smaller DHVQFN16 footprint, and lower static current; compared with 74LVC595ABQ-Q100, it provides independent shift/storage reset control essential for glitch-free command staging in safety-critical subsystems.

Availability

74LVC594ABQ-Q100 is available at Aetrix Electronics and suitable for automotive body electronics, instrument cluster interfaces, and remote keyless entry systems requiring stable component supply across extended temperature ranges and full AEC-Q100 lifecycle assurance.

Supply support for 74LVC594ABQ-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 components optimized for automotive, industrial, and consumer applications, with leadership in logic, MOSFETs, and ESD protection.

The 74LVC594A-Q100 belongs to Nexperia's automotive-qualified LVC logic family, designed specifically for robust serial data latching and I/O expansion in harsh-temperature automotive environments where reliability and signal integrity are critical.

FAQ

What is the purpose of the separate SHR and STR pins?

The SHR (Shift Register Reset) and STR (Storage Register Reset) pins provide independent asynchronous reset control: SHR clears only the 8-bit shift register (stages holding serially loaded data), while STR clears only the 8-bit storage register (driving Q0–Q7 outputs). This enables precise staging-e.g., resetting incoming data without affecting currently latched outputs-critical for glitch-free command execution in automotive control units.

Can the 74LVC594ABQ-Q100 interface directly with a 5 V microcontroller?

Yes. Its inputs are overvoltage tolerant up to 5.5 V regardless of VCC level (1.2 V to 3.6 V), allowing direct connection to 5 V GPIOs without level-shifting circuitry. Output voltage levels remain compatible with 3.3 V logic families when VCC = 3.3 V, and the IOFF feature prevents back-current if the device is powered down while 5 V signals remain present.

How does the IOFF feature improve system reliability?

IOFF disables all outputs when VCC = 0 V, placing them in high-impedance state. This prevents damaging backflow current from live 5 V buses into a powered-down 74LVC594ABQ-Q100-common during partial system shutdowns or hot-swap events in automotive ECUs. Measured IOFF leakage is ≤20 μA, ensuring safe isolation without external blocking components.

Is the DHVQFN16 package suitable for automated optical inspection (AOI)?

Yes. The SOT763-1 DHVQFN16 package features side-wettable flanks-exposed copper on package edges-which reflect light uniformly during AOI. This enables reliable, high-accuracy solder joint inspection of all 16 terminals, meeting zero-defect requirements for automotive PCB assembly. The 0.5 mm pitch and 2.5 × 3.5 mm footprint also support high-density routing.