Nexperia USA Inc. 74HCT4094D-Q100J

Overview

74HCT4094D-Q100 from Nexperia is an automotive-grade 8-bit serial-in/parallel-out shift-and-store bus register with separate shift and storage clocks, 3-state outputs, dual serial outputs (QS1/QS2) for daisy-chaining, and TTL-compatible inputs. It operates from -40 °C to +125 °C, supports 4.5–5.5 V supply, and delivers ≤59 ns propagation delay at VCC = 4.5 V - enabling reliable serial-to-parallel data conversion in automotive body control modules.

For engineers reviewing the 74HCT4094D-Q100 datasheet, 74HCT4094D-Q100 pinout, 74HCT4094D-Q100 application, or 74HCT4094D-Q100 equivalent, this device serves as a cascaded shift-register interface for LED driver arrays, multiplexed sensor readouts, and remote I/O expansion where AEC-Q100 Grade 1 qualification and deterministic timing under fast/slow clock edges are required.

Technical Context

The device implements two independent 8-bit registers: a shift register clocked on CP rising edge (with QS1 outputting current stage-6 data and QS2 outputting stage-7 data on the subsequent falling edge), and a parallel storage register loaded synchronously via STR high pulse. This architecture enables precise separation of data shifting and output latching - critical for glitch-free display or actuator control.

Input levels conform to TTL thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V at VCC = 4.5–5.5 V), while outputs drive ±4.0 mA at VOH ≥ 3.7 V and VOL ≤ 0.4 V. The 3-state OE control operates independently of register state, and integrated input clamp diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors.

Key Specifications

Pinout & Package

74HCT4094D-Q100 uses the SO16 plastic small outline package (SOT109-1), 16-pin, 3.9 mm body width, with gull-wing leads and standard JEDEC MS-012 outline.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC4094D-Q100 and SN74LV4094APWR, the 74HCT4094D-Q100 uniquely balances TTL-level MCU compatibility, AEC-Q100 Grade 1 qualification, and deterministic dual-edge cascade timing - making it the only option qualified for safety-critical automotive serial I/O expansion.

Availability

74HCT4094D-Q100 is available at Aetrix Electronics and suitable for automotive body control modules, LED matrix display drivers, remote sensor interface hubs, and industrial I/O expansion cards requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HCT4094D-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, analog, and MOSFET technologies.

This device belongs to Nexperia's automotive-qualified logic portfolio, engineered specifically for robust serial data distribution in harsh environments - emphasizing AEC-Q100 compliance, wide temperature operation, and noise-immune cascade architectures.

FAQ

What is the maximum clock frequency supported by 74HCT4094D-Q100?

The device supports up to 24 MHz at VCC = 4.5 V and -40 °C to +85 °C, and 20 MHz across its full -40 °C to +125 °C automotive range. This is determined by the longest propagation path (CP to QPn), measured at ≤59 ns under worst-case conditions, enabling reliable operation in real-time control applications.

How do QS1 and QS2 differ in timing behavior?

QS1 outputs the data from shift register stage 6 on the same CP rising edge that advances the data; QS2 outputs stage 7 data on the subsequent CP falling edge. This dual-output scheme allows seamless daisy-chaining regardless of clock edge speed - QS1 for fast edges, QS2 for slower or filtered clocks - without added latency or external logic.

Can OE be toggled while STR is active without corrupting stored data?

Yes. The OE input controls only the 3-state output drivers and has no effect on either the shift or storage registers. Data remains intact in the storage register during OE transitions, allowing dynamic bus sharing or power-gating of outputs without loss of latched state - a key feature for hot-swap-capable I/O subsystems.

Is external pull-up required on QS1/QS2 outputs?

No. QS1 and QS2 are active-push-pull outputs, not open-drain. They drive both HIGH and LOW actively, with VOH ≥ 3.7 V and VOL ≤ 0.4 V at 4.0 mA load. Pull-ups are unnecessary and would degrade rise/fall times and increase power consumption in cascaded configurations.