Toshiba Semiconductor and Storage 74HCT4051D

Overview

74HCT4051D from Toshiba Electronic Devices & Storage Corporation is an 8-channel analog multiplexer/demultiplexer IC designed for bidirectional signal routing in mixed-signal systems. It operates from a single 4.5–5.5 V supply with VEE referenced to GND or down to –5.5 V, supports ±5 V analog signal switching (e.g., –5 V to +5 V with VCC = 5 V, VEE = –5 V), features 50 Ω typical ON-resistance, and delivers 0.020 % THD at 1 kHz - enabling precision audio and sensor signal conditioning in industrial data acquisition.

For engineers reviewing the 74HCT4051D datasheet, 74HCT4051D pinout, 74HCT4051D application, or 74HCT4051D equivalent, key selection criteria include its SOIC16 package, TTL-compatible digital inputs (VIH = 2.0 V min, VIL = 0.8 V max), wide –40 °C to +125 °C operating range (for units manufactured after July 2020), and low 4.0 µA max quiescent current - critical for battery-powered instrumentation and automotive body control modules.

Technical Context

The 74HCT4051D implements an 8:1 analog switch matrix controlled by three binary address inputs (A, B, C) and an active-low inhibit input (INH). Its C2MOS silicon gate process enables LSTTL-speed propagation (tPZL/tPLZ ≤ 45 ns at VCC = 5.5 V, Ta = –40 to +85 °C) while maintaining CMOS-level power efficiency. All eight switched I/O channels share a common terminal (COM), and each channel's ON-resistance remains tightly matched (∆RON ≤ 180 Ω max at VCC = 5.5 V, VEE = –5.5 V).

Analog performance is characterized under defined load conditions: THD = 0.020 % typ. at RL = 10 kΩ, CL = 50 pF, fIN = 1 kHz; feedthrough attenuation ≥50 dB at 1 MHz; crosstalk between switches ≤ –90 dB at 100 kHz. Input/IO protection circuits guard against ESD and transient overvoltage, supporting robust operation in noisy industrial environments.

Key Specifications

Pinout & Package

74HCT4051D is housed in a 16-pin Small Outline Integrated Circuit (SOIC16) package, 7.5 mm wide, with 1.27 mm pitch and 0.15 g typical mass. Pin functions are validated per Toshiba Rev. 4.0 datasheet (2020-11-26).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar analog multiplexer applications.

Compared with CD74HC4051M96 and ADG1408YRUZ, the 74HCT4051D uniquely balances bipolar analog support (via VEE), industry-grade temperature range, and ultra-low quiescent current - making it optimal for cost-sensitive, battery-operated, or automotive-qualified analog multiplexing where ±5 V signal handling and 0.02 % THD are design-critical.

Availability

74HCT4051D is available at Aetrix Electronics and suitable for industrial sensor hubs, automotive cabin audio systems, portable medical instrumentation, and test & measurement signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HCT4051D 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

Toshiba Electronic Devices & Storage Corporation designs high-reliability semiconductor components for industrial, automotive, and consumer applications, with emphasis on energy efficiency, signal fidelity, and long-term manufacturability.

The 74HCT4051D belongs to Toshiba's HCT-series high-speed CMOS logic family, engineered specifically for robust analog signal switching in mixed-signal systems where TTL compatibility, low power, and wide temperature operation are essential.

FAQ

What is the maximum analog signal voltage range supported by the 74HCT4051D?

The 74HCT4051D supports analog signals from VEE to VCC. With VCC = 5 V and VEE = –5 V, it handles ±5 V signals (–5 V to +5 V). Absolute maximum ratings allow VCC–VEE up to 13.0 V, but operational VI/O range is bounded by VEE –0.5 V to VCC +0.5 V per datasheet Section 11.

Does the 74HCT4051D require separate analog and digital ground planes?

No - the 74HCT4051D uses a single GND pin (Pin 15) for both digital control and analog signal return. Layout best practice recommends a low-impedance shared ground with local VCC/VEE decoupling near Pins 14 and 16 to minimize noise coupling into the COM and Yn paths.

Can the 74HCT4051D operate with VEE tied to GND?

Yes. When VEE = GND, the 74HCT4051D functions as a unipolar 0–VCC analog switch (e.g., 0–5 V). RON increases slightly versus negative VEE bias, and THD may rise marginally - see DC characteristics Tables 12.1–12.3 for VEE = GND data points.

What is the worst-case ON-resistance mismatch (∆RON) between channels of the 74HCT4051D?

Per Section 12.1, ∆RON is 180 Ω max at VCC = 5.5 V and VEE = –5.5 V, Ta = 25 °C. At extended temperature (–40 to +125 °C), ∆RON reaches 245 Ω max (Section 12.3), directly impacting gain consistency in multi-channel ratiometric measurements.

Is the 74HCT4051D RoHS compliant and lead-free?

Yes - Toshiba confirms RoHS compliance for the 74HCT4051D per its environmental documentation. The SOIC16 package uses lead-free terminations and complies with EU Directive 2011/65/EU; full material declarations are available upon request from Toshiba or authorized distributors.