Nexperia USA Inc. 74HCT595BQ-Q100,11

Overview

74HCT595BQ-Q100 from Nexperia is an automotive-qualified 8-bit serial-in, serial-or-parallel-out shift register with storage latch and 3-state outputs, operating from -40 °C to +125 °C. It features separate shift (SHCP) and storage (STCP) clocks, asynchronous master reset (MR), output enable (OE), and cascading-capable serial output (Q7S). Used in automotive body control modules for LED matrix expansion and sensor data aggregation.

For engineers reviewing the 74HCT595BQ-Q100 datasheet, 74HCT595BQ-Q100 pinout, 74HCT595BQ-Q100 application, or 74HCT595BQ-Q100 equivalent, key selection criteria include TTL-compatible input thresholds, 3-state parallel output drive capability (±6 mA at VCC = 4.5 V), propagation delay ≤42 ns (STCP→Qn), and DHVQFN16 package suitability for AOI-enabled automotive PCB assembly.

Technical Context

The device implements two independent synchronous registers: an 8-stage shift register clocked by SHCP (LOW-to-HIGH edge) and an 8-bit storage register clocked by STCP (LOW-to-HIGH edge). Data transfers from shift to storage register only on STCP edges - enabling precise output update timing decoupled from serial loading.

Outputs are controlled exclusively by OE (active LOW); MR resets only the shift register without affecting stored data. Input clamp diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors, supporting mixed-voltage system integration.

Key Specifications

Pinout & Package

DHVQFN16 (SOT763-1) package: 2.5 × 3.5 × 0.85 mm body, side-wettable flanks for automated optical inspection (AOI), no leads, 16 copper terminals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC595BQ-Q100, the 74HCT595BQ-Q100 offers guaranteed TTL input compatibility essential for legacy MCU interfaces, while SN74LV595AQPWRQ1 provides superior speed and voltage range at the cost of pinout redesign - making the HCT variant optimal for drop-in upgrades in existing 5 V automotive platforms.

Availability

74HCT595BQ-Q100 is available at Aetrix Electronics and suitable for automotive body electronics, LED lighting control, and sensor interface modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HCT595BQ-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 for automotive, industrial, and consumer markets, with leadership in logic, MOSFETs, and ESD protection.

This device belongs to Nexperia's automotive-qualified 74HCT logic family, engineered specifically for robust serial-to-parallel data conversion in harsh environments where AEC-Q100 compliance and thermal stability are mandatory.

FAQ

Can 74HCT595BQ-Q100 operate reliably at 125 °C ambient?

Yes. The device is qualified per AEC-Q100 Grade 1, guaranteeing full functionality from –40 °C to +125 °C ambient. Electrical parameters including propagation delay (≤60 ns), output drive (≥3.7 V VOH at 6 mA), and supply current (≤160 μA) are specified across this full range, with derated power dissipation (500 mW at 106 °C, linearly decreasing above).

What is the minimum pulse width required on SHCP and STCP inputs?

The minimum pulse width for both SHCP and STCP is 16 ns at VCC = 4.5 V (–40 °C to +125 °C). This corresponds to a maximum clock frequency of 52 MHz. Pulse widths must meet this spec on both HIGH and LOW phases to ensure reliable register advancement and data capture without metastability.

How does the MR (master reset) pin interact with the storage register?

MR is asynchronous and affects only the shift register: a LOW on MR clears all eight stages of the shift register to zero but leaves the storage register and its parallel outputs (Q0–Q7) unchanged. This allows safe initialization of serial input paths without disrupting currently displayed or driven outputs.

Is the DHVQFN16 package compatible with standard reflow profiles?

Yes. The SOT763-1 package is qualified for lead-free reflow per JEDEC J-STD-020, with peak temperature up to 260 °C. Its side-wettable flanks are designed for automated optical inspection post-reflow, and the 0.5 mm pitch and 0.85 mm height support high-density automotive PCB layouts without compromising thermal performance.