Nexperia USA Inc. 74HCT4094DB,118

Overview

74HCT4094DB,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, and cascading capability via QS1/QS2 serial outputs. It operates at 4.5 V to 5.5 V, supports -40 °C to +125 °C industrial temperature range, and delivers 25 ns typical propagation delay (CP to QPn) at 4.5 V - used in LED matrix drivers and remote control hold registers.

For engineers reviewing the 74HCT4094DB,118 datasheet, 74HCT4094DB,118 pinout, 74HCT4094DB,118 application, or 74HCT4094DB,118 equivalent, this device enables precise timing-critical serial-to-parallel conversion where TTL-level input compatibility, output enable control, and multi-stage cascade are required.

Technical Context

The device implements two independent synchronous registers: an 8-stage shift register clocked on CP rising edge and a parallel storage register loaded on STR high. Data appears at QS1 on the same CP rising edge and at QS2 on the subsequent CP falling edge - enabling flexible inter-device synchronization across fast/slow clock edge regimes.

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 VCC when current-limiting resistors are used - critical for mixed-voltage system integration.

Key Specifications

Pinout & Package

74HCT4094DB,118 is housed in a plastic shrink small outline package (SSOP16, SOT338-1) with 16 leads, 0.65 mm lead pitch, and 5.3 mm body width - optimized for automated assembly and thermal performance in space-constrained applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC4094DB,118 and SN74HCT595PWR, the 74HCT4094DB,118 uniquely supports true dual-edge cascading and independent strobe control - essential for deterministic multi-device synchronization without added glue logic.

Availability

74HCT4094DB,118 is available at Aetrix Electronics and suitable for LED matrix drivers, industrial I/O expanders, remote control hold registers, and automotive body controllers requiring stable component supply across extended temperature ranges.

Supply support for 74HCT4094DB,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, reliable logic, discrete, and MOSFET solutions with focus on efficiency and miniaturization.

The 74HCT4094DB,118 belongs to Nexperia's 74HCT logic family - engineered for TTL-compatible interfacing in industrial and automotive applications demanding wide temperature operation and robust ESD immunity.

FAQ

What is the maximum clock frequency supported by 74HCT4094DB,118?

The device supports up to 24 MHz at VCC = 4.5 V and -40 °C to +85 °C, and 20 MHz at full -40 °C to +125 °C range. This is derived from tW(min) = 20 ns for CP HIGH/LOW pulses and fmax = 1/tW, verified in Table 7 under recommended operating conditions.

How do QS1 and QS2 differ in timing behavior?

QS1 outputs the QP7 bit on the same LOW-to-HIGH CP transition that loads it into the shift register, while QS2 outputs that same bit on the subsequent HIGH-to-LOW CP transition. This dual-phase output enables cascading across devices with mismatched clock edge sensitivities.

Can OE be toggled while STR is active?

Yes - OE controls only output driver state and has no effect on internal register contents. Data remains latched in the storage register regardless of OE state, allowing dynamic bus contention management without data loss or timing disruption.

Is 74HCT4094DB,118 pin-compatible with 74HC4094DB,118?

Yes - both share identical SSOP16 (SOT338-1) pinout and function set. The only difference is input threshold levels: 74HCT4094DB,118 accepts TTL inputs (VIH ≥ 2.0 V), while 74HC4094DB,118 requires CMOS thresholds (VIH ≥ 3.15 V at VCC = 4.5 V).