NXP Semiconductors 74HCT4051DB,118

Overview

74HCT4051DB,118 from Nexperia is a single-pole octal-throw (SP8T) analog multiplexer/demultiplexer IC with 8 independent bidirectional channels (Y0–Y7), common I/O (Z), three binary select inputs (S0–S2), and active-low enable (E). It operates across ±5 V analog signal ranges with typical ON resistance of 60 Ω at VCC–VEE = 9.0 V and supports logic-level translation between 5 V digital control and ±5 V analog paths. It is used in precision sensor signal routing for industrial data acquisition systems.

For engineers reviewing the 74HCT4051DB,118 datasheet, 74HCT4051DB,118 pinout, 74HCT4051DB,118 application, or 74HCT4051DB,118 equivalent, key selection criteria include guaranteed operation from –40 °C to +125 °C, rail-to-rail analog voltage handling (VEE to VCC), low crosstalk (220 mV max at ±4.5 V), and TSSOP16 package compatibility with high-density PCB layouts.

Technical Context

The 74HCT4051DB,118 implements a CMOS-based 1-of-8 decoder driving eight transmission-gate switches, each featuring integrated clamp diodes for overvoltage protection on all Yn and Z pins. Its logic inputs comply with TTL thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V), enabling direct interfacing with legacy 5 V microcontrollers.

Switch operation follows strict break-before-make timing (typical), minimizing transient short-circuits during channel transitions. The device supports dual-supply operation (VCC and VEE referenced to GND), allowing symmetric ±5 V analog signal handling without level-shifting circuitry.

Key Specifications

Pinout & Package

74HCT4051DB,118 is housed in a 16-lead TSSOP package (SOT403-1), 4.4 mm body width, 0.65 mm pitch, with exposed pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC4051PW,118, the 74HCT4051DB,118 offers tighter TTL-compatible logic thresholds and faster switching (16 ns vs. 20 ns turn-on), while ADG708BRUZ trades bipolar capability and parallel control for lower RON and serial configurability-making it unsuitable as a drop-in replacement but viable for new low-voltage designs.

Availability

74HCT4051DB,118 is available at Aetrix Electronics and suitable for industrial automation, automotive cabin electronics, and medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HCT4051DB,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 components for automotive, industrial, and consumer markets, with leadership in logic, analog, and MOSFET technologies.

The 74HCT4051DB,118 belongs to Nexperia's 74HCT logic family, engineered for robust 5 V TTL-compatible operation in noise-sensitive analog-digital interface applications demanding wide temperature range and high channel isolation.

FAQ

What is the maximum analog signal voltage range supported by the 74HCT4051DB,118?

The 74HCT4051DB,118 supports analog signals from VEE to VCC. With VCC = 4.5 V and VEE = –4.5 V, it handles –5 V to +5 V signals. When VEE = 0 V, the range is 0 V to VCC (4.5–5.5 V). This dual-supply flexibility allows direct interfacing with bipolar sensors without external level-shifting circuitry, and the 74HCT4051DB,118 maintains specified RON and leakage performance across this full range.

Does the 74HCT4051DB,118 require external pull-up or pull-down resistors on its select lines (S0–S2)?

No, the 74HCT4051DB,118 has no internal pull resistors on S0–S2 or E; these inputs rely on driven logic levels. However, because they exhibit low input leakage (±0.1 μA typical), floating inputs are unstable and must be actively driven or externally terminated. For robust operation in noisy environments, 10 kΩ pull-downs on S0–S2 and E are recommended to ensure defined LOW states during reset or MCU initialization, and the 74HCT4051DB,118 will function correctly with such external biasing.

Can the 74HCT4051DB,118 be used with a single 5 V supply (VEE = GND) while switching ±2.5 V analog signals?

No. When VEE = GND, the 74HCT4051DB,118 only supports analog signals from 0 V to VCC (4.5–5.5 V). Applying negative voltages to Yn or Z pins violates absolute maximum ratings and risks latch-up or permanent damage. To switch ±2.5 V signals, VEE must be set to –2.5 V (or lower), and VCC ≥ 2.5 V, ensuring VCC–VEE ≥ 5.0 V. The 74HCT4051DB,118 requires proper dual-supply configuration for any bipolar signal handling.

What is the typical crosstalk performance of the 74HCT4051DB,118 and how is it measured?

The 74HCT4051DB,118 exhibits ≤220 mV typical crosstalk at 1 MHz with VCC = 4.5 V and VEE = –4.5 V, measured as peak-to-peak voltage coupled from an active square-wave-driven channel to an adjacent OFF-state channel under 600 Ω load. This specification reflects worst-case coupling between adjacent pins in the TSSOP package and confirms suitability for multi-channel precision measurement where signal integrity across channels is critical, and the 74HCT4051DB,118 meets this requirement without additional shielding.

How does the enable (E) pin behavior affect power consumption in the 74HCT4051DB,118?

When E is HIGH, all internal switches are fully OFF, reducing supply current to ≤±0.4 μA (ICC) and eliminating channel conduction losses. This state cuts total power dissipation to near-zero, making the 74HCT4051DB,118 ideal for power-gated subsystems. In contrast, with E LOW and one channel ON, ICC rises to ≤16 μA (typical at VCC = 5 V, VEE = –5 V), dominated by static logic current-not switch conduction-so the 74HCT4051DB,118 delivers ultra-low quiescent power in standby mode without compromising active-channel performance.