Nexperia USA Inc. 74HCT4094D,112

Overview

74HCT4094D,112 from Nexperia is an 8-bit serial-in/parallel-out shift-and-store bus register with separate shift and storage clocks, 3-state outputs, TTL-compatible inputs, and cascading capability via QS1/QS2 serial outputs. It operates from 4.5 V to 5.5 V across –40 °C to +125 °C, supports up to 80 MHz clock frequency at VCC = 5 V, and enables remote control holding register functions in industrial I/O expanders.

For engineers reviewing the 74HCT4094D,112 datasheet, 74HCT4094D,112 pinout, 74HCT4094D,112 application, or 74HCT4094D,112 equivalent, key selection criteria include its dual-clock architecture (CP and STR), guaranteed 3-state output control via OE, TTL-level input compatibility, propagation delay ≤49 ns (VCC = 4.5 V), and SO16 package thermal derating profile.

Technical Context

The device implements an 8-stage shift register followed by an independent 8-bit storage latch, both clocked separately: CP controls serial shifting on LOW-to-HIGH transitions, while STR transfers data from shift to storage register on HIGH assertion. Outputs QP0–QP7 are 3-state buffered and enabled only when OE is HIGH.

Two serial outputs-QS1 (data available on same CP rising edge) and QS2 (data delayed to next CP falling edge)-enable flexible daisy-chaining under varying signal integrity conditions. Input clamp diodes allow safe interfacing with voltages exceeding VCC when used with current-limiting resistors.

Key Specifications

Pinout & Package

74HCT4094D,112 is supplied in SO16 plastic small outline package (SOT109-1), 16-pin, 3.9 mm body width, with standard JEDEC MS-012 footprint and gull-wing leads.

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,112 and SN74HCT595DR, the 74HCT4094D,112 uniquely provides independent shift/latch clocks and dual-phase serial outputs - enabling glitch-free cascading in high-noise industrial buses where clock edge fidelity varies across boards.

Availability

74HCT4094D,112 is available at Aetrix Electronics and suitable for industrial I/O expansion, LED matrix driver circuits, remote control latching, and PLC digital output modules requiring stable component supply across extended temperature ranges.

Supply support for 74HCT4094D,112 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 discrete, logic, and MOSFET devices optimized for efficiency-critical applications.

The 74HCT4094D,112 belongs to Nexperia's 74HCT logic family - engineered for seamless integration with legacy TTL systems while delivering CMOS power efficiency and industrial-grade reliability.

FAQ

What is the difference between QS1 and QS2 outputs?

QS1 delivers the QP7 bit on the same LOW-to-HIGH CP transition that shifts it into the final stage, enabling fast cascading when clock edges are clean. QS2 delivers the same bit on the subsequent HIGH-to-LOW CP transition, providing setup margin for slower or noisy clock edges - both outputs support daisy-chaining but serve distinct signal integrity roles.

Can OE be toggled while CP or STR are active?

Yes. The OE input operates independently of CP and STR; asserting or deasserting OE does not alter the contents of either the shift or storage registers. Outputs enter or exit high-impedance state immediately, making OE suitable for dynamic bus sharing without disrupting ongoing serial load or latch operations.

Is the 74HCT4094D,112 compatible with 3.3 V microcontrollers?

No - the 74HCT4094D,112 requires VCC = 4.5–5.5 V and has TTL-level inputs (VIH ≥ 2.0 V). While it may accept 3.3 V logic HIGHs, guaranteed recognition is not specified below VCC = 4.5 V. For 3.3 V systems, use 74LVC4094 or level-shifting circuitry.

How is the SO16 package thermally rated?

The SOT109-1 (SO16) package has a total power dissipation limit of 500 mW at T_A ≤ 110 °C, derating linearly by 12.4 mW/K above that temperature. This rating assumes standard JEDEC 2-layer board layout with 1 in² copper pour; actual thermal performance depends on PCB copper area and airflow.