Nexperia USA Inc. HEF4094BTT-Q100J

Overview

HEF4094BTT-Q100 from Nexperia is an automotive-qualified 8-bit serial-in/serial-or-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 features AEC-Q100 Grade 1 qualification. It is used in serial-to-parallel data conversion for automotive body control modules requiring cascaded LED or relay drivers.

For engineers reviewing the HEF4094BTT-Q100 datasheet, HEF4094BTT-Q100 pinout, HEF4094BTT-Q100 application, or HEF4094BTT-Q100 equivalent, key selection criteria include propagation delay vs. supply voltage (e.g., 50 ns typ @ 15 V), dual-edge serial output timing (QS1 on CP↑, QS2 on CP↓), 3-state output enable (OE) behavior, and TSSOP16 package thermal derating (8.5 mW/K above 91 °C).

Technical Context

The device implements two synchronized but independent 8-bit registers: a shift register clocked on CP rising edges and a storage register loaded via STR high pulse. Data propagates through the shift register on each CP↑, with QS1 reflecting stage Q6S and QS2 reflecting Q7S on the subsequent CP↓ - enabling robust inter-device synchronization across varying clock edge rates.

Its 3-state outputs are controlled solely by OE (active-HIGH), with no effect on internal register states. Input clamp diodes allow safe interfacing to voltages exceeding VDD when used with current-limiting resistors, supporting mixed-voltage system integration without level shifters.

Key Specifications

Pinout & Package

TSSOP16 plastic thin shrink small outline package (SOT403-1); 16 leads; body width 4.4 mm; 0.65 mm pitch; exposed pad not present; RoHS-compliant.

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 HEF4094BTT-Q100 uniquely supports 12–15 V automotive rails, provides dual-edge serial outputs for robust cascading, and includes input clamps - making it the only option qualified for under-hood body control applications requiring mixed-voltage interoperability and extended temperature operation.

Availability

HEF4094BTT-Q100 is available at Aetrix Electronics and suitable for automotive body control units, LED matrix display drivers, remote control holding registers, and industrial I/O expansion modules requiring stable component supply across extended temperature and voltage ranges.

Supply support for HEF4094BTT-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, and energy-efficient components for automotive, industrial, computing, and consumer applications.

The HEF4094B-Q100 belongs to Nexperia's automotive logic portfolio, designed specifically for robust serial-to-parallel conversion in harsh environment control systems where AEC-Q100 compliance, wide supply range, and deterministic timing are mandatory.

FAQ

What is the function of the QS1 and QS2 pins?

QS1 outputs the data from shift register stage Q6 on each CP rising edge, enabling tight-timing cascading. QS2 outputs stage Q7 on the subsequent CP falling edge, accommodating longer inter-device propagation delays. This dual-output architecture ensures reliable daisy-chaining across varying PCB trace lengths and clock slew rates without added timing margin.

Can HEF4094BTT-Q100 operate at 12 V supply?

Yes - the device is fully specified from 3.0 V to 15.0 V, including parametric ratings at 5 V, 10 V, and 15 V. At 12 V, typical propagation delay is ~55 ns, output drive is ±2.0 mA, and static current remains below 600 μA. No derating or external components are required for 12 V automotive battery rail operation.

How does the STR input interact with the CP clock?

STR is asynchronous to CP: a HIGH pulse on STR transfers the current contents of the shift register into the storage register, regardless of CP state. This allows data to be shifted in continuously via CP while holding outputs stable until a precise moment - essential for glitch-free updates in display or actuator control systems.

Is the TSSOP16 package thermally adequate for +125 °C operation?

Yes - the SOT403-1 (TSSOP16) package is rated for operation up to +125 °C ambient. Its total power dissipation is 500 mW at ≤91 °C, derating linearly by 8.5 mW/K above that. At +125 °C, usable power is 472 mW, sufficient for typical 8-bit register operation with moderate capacitive loads and 15 V supply.