Nexperia USA Inc. HEF4094BT-Q100J

Overview

HEF4094BT-Q100 from Nexperia is an AEC-Q100 Grade 1 qualified 8-bit serial-in/parallel-out shift-and-store register with independent shift and storage clocks, 3-state outputs, and dual serial outputs (QS1, QS2) for daisy-chaining. It operates from 3.0 V to 15.0 V, supports -40 °C to +125 °C ambient, and delivers 5 ns minimum clock pulse width at 15 V for high-speed automotive control bus expansion.

For engineers reviewing the HEF4094BT-Q100 datasheet, HEF4094BT-Q100 pinout, HEF4094BT-Q100 application, or HEF4094BT-Q100 equivalent, this device serves as a robust serial-to-parallel interface for LED matrix drivers, remote control holding registers, and multi-channel GPIO expanders in safety-critical vehicle subsystems where supply voltage flexibility and ESD resilience are mandatory.

Technical Context

The HEF4094BT-Q100 implements two synchronized but independently clocked 8-bit shift registers: one for serial data capture (CP-triggered on LOW-to-HIGH) and one for parallel output latching (STR-triggered). Data propagates through QS1 on the same CP edge and QS2 on the subsequent CP edge-enabling reliable cascading under both fast and slow clock edge conditions.

Its 3-state outputs (QP0–QP7) are controlled solely by OE, with no effect on internal register states. Input clamp diodes allow direct interfacing to voltages exceeding VDD when used with current-limiting resistors, supporting mixed-voltage signal routing in automotive body control modules.

Key Specifications

Pinout & Package

HEF4094BT-Q100 is supplied in SO16 (SOT109-1) plastic small outline package, 16-pin, 3.9 mm body width, with standard 1.27 mm lead pitch and gull-wing leads suitable for automated reflow assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74HC595QPWRQ1 and 74LVC595APWJ, the HEF4094BT-Q100 uniquely combines AEC-Q100 Grade 1 qualification, 15 V operation, and dual serial outputs-making it the sole option for robust, voltage-flexible, daisy-chain-capable shift register deployment in automotive powertrain and chassis systems.

Availability

HEF4094BT-Q100 is available at Aetrix Electronics and suitable for automotive body control modules, LED lighting systems, remote control interfaces, and industrial I/O expansion requiring stable component supply across extended temperature and voltage ranges.

Supply support for HEF4094BT-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 global semiconductor expert delivering high-performance, reliable components for automotive, industrial, and consumer markets with emphasis on efficiency, reliability, and sustainability.

The HEF4094B-Q100 belongs to Nexperia's automotive-qualified logic portfolio, engineered specifically for serial data expansion in harsh-environment electronic control units where voltage tolerance, thermal stability, and ESD robustness are non-negotiable.

FAQ

What is the function of the QS1 and QS2 outputs?

QS1 outputs the data from shift register stage 6 on the same LOW-to-HIGH CP transition used for shifting, enabling minimal-latency cascading. QS2 outputs stage 7 data on the subsequent HIGH-to-LOW CP transition, accommodating slower clock edges without violating setup/hold timing-both outputs support seamless daisy-chaining of multiple HEF4094BT-Q100 devices.

Can HEF4094BT-Q100 operate at 3.3 V?

Yes, HEF4094BT-Q100 is fully specified down to 3.0 V supply voltage per Table 5, with validated VIH/VIL thresholds, propagation delays, and output drive strength at 3.3 V. It maintains AEC-Q100 Grade 1 operation across -40 °C to +125 °C at this voltage, making it compatible with modern low-voltage microcontrollers in automotive domain controllers.

How does the STR input interact with the CP clock?

STR and CP are fully independent: CP shifts serial data through the 8-bit shift register on each LOW-to-HIGH edge, while STR (when HIGH) transfers the entire 8-bit content from the shift register into the storage register on the *next* LOW-to-HIGH CP edge. This separation allows asynchronous data capture and synchronous output update-preventing glitches during partial shifts.

Is there a recommended layout practice for the OE pin?

OE should be routed with short, low-inductance traces and decoupled near the IC with a 100 nF ceramic capacitor to VSS. Because OE controls all eight outputs simultaneously, noise or bounce on this line can cause momentary bus contention or unintended output transitions-especially critical in shared-bus automotive networks where simultaneous driver activation must be avoided.