Nexperia USA Inc. 74HC4094DB,118

Overview

74HC4094DB,118 from Nexperia is an 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 operation across -40 °C to +125 °C. It enables cascaded serial-to-parallel conversion in LED matrix drivers and remote I/O expanders where low-power CMOS logic and output isolation are required.

For engineers reviewing the 74HC4094DB,118 datasheet, 74HC4094DB,118 pinout, 74HC4094DB,118 application, or 74HC4094DB,118 equivalent, key selection criteria include propagation delay (≤39 ns at VCC = 4.5 V), 3-state output enable timing (ten ≤35 ns), QS1/QS2 phase relationship for clock-edge-agnostic cascading, and SSOP16 thermal derating (8.5 mW/K above 91 °C).

Technical Context

This device implements two synchronized but independent 8-bit registers: a shift register clocked on CP rising edges (with data appearing at QS1 on same edge and QS2 on next falling edge), and a latch-based storage register triggered by STR high. The separation allows asynchronous loading of new data while holding prior outputs stable.

Its 3-state parallel outputs (QP0–QP7) are controlled solely by OE, with no effect on internal register states; input clamp diodes permit safe interfacing to voltages exceeding VCC when used with current-limiting resistors.

Key Specifications

Pinout & Package

74HC4094DB,118 uses the SOT338-1 package: plastic shrink small outline (SSOP16), 16 leads, 5.3 mm body width, 0.65 mm pitch, and exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HCT4094DB,118, the HC variant offers lower static power and wider VCC range but requires CMOS-level drive; versus SN74HC595PWR, the 74HC4094DB,118 provides deterministic dual-edge cascading and true 3-state control per output bank - critical for noise-sensitive industrial backplanes.

Availability

74HC4094DB,118 is available at Aetrix Electronics and suitable for LED matrix drivers, industrial I/O expanders, automotive body controllers, and remote sensor hubs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HC4094DB,118 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 logic, analog, and discrete components with focus on efficiency, reliability, and sustainability.

The 74HC4094 belongs to Nexperia's 74HC logic family - engineered for low-power, wide-VCC, and high-noise-immunity applications in automotive, industrial, and consumer electronics.

FAQ

What is the maximum clock frequency for reliable operation?

The 74HC4094DB,118 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 range. This is validated by tW (clock pulse width) ≥20 ns minimum and fmax test conditions in the datasheet. Operation beyond these limits risks setup/hold violations and metastability in the shift register stages.

How do QS1 and QS2 differ in timing behavior?

QS1 delivers the data from shift register stage Q6 on the same CP rising edge that loads it; QS2 delivers Q7 on the subsequent CP falling edge. This dual-phase output eliminates cascading timing uncertainty: QS1 suits fast-clock systems (<10 ns rise time), while QS2 accommodates slower edges without added delay circuitry or clock inversion.

Can OE be toggled while STR is active?

Yes - OE and STR operate independently. Toggling OE to LOW places QP0–QP7 in high-impedance state without altering data in either the shift or storage register. STR remains fully functional to load new data into the storage register, enabling seamless output blanking during data updates.

Is the SSOP16 package RoHS-compliant and lead-free?

Yes - the SOT338-1 (SSOP16) package used for 74HC4094DB,118 is lead-free and RoHS-compliant per Nexperia's product compliance documentation. It meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL1) and supports standard reflow profiles up to 260 °C peak.