Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Interface > Analog Switches, Multiplexers, Demultiplexers

STMicroelectronics HCF4051BEY

Name: HCF4051BEY
Brand: STMicroelectronics
SKU: HCF4051BEY
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: HCF4051BEY

Manufacturer:: STMicroelectronics

Category:: Analog Switches, Multiplexers, Demultiplexers

Package:: 16-DIP (0.300", 7.62mm)

Datasheet:: HCF4051BEY.pdf

Description:: IC MUX 8:1 280OHM 16DIP

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:1,732

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

HCF4051BEY from STMicroelectronics is a single 8-channel analog multiplexer/demultiplexer in PDIP-16 package, designed for bidirectional analog signal routing under digital control. It features 125 Ω typical ON resistance, ±100 pA typical channel leakage at 18 V supply, and supports ±15 V peak-to-peak analog signals with VDD–VEE = 15 V. Used in automotive sensor signal conditioning, industrial data acquisition front-ends, and test equipment channel selection.

For engineers reviewing the HCF4051BEY datasheet, HCF4051BEY pinout, HCF4051BEY application, or HCF4051BEY equivalent, key selection criteria include guaranteed operation from –55 °C to +125 °C, binary-addressed channel selection (A/B/C), inhibit-controlled global disable, and low-quiescent-power switching across 3–20 V supply range.

Technical Context

The HCF4051BEY implements an 8:1 analog multiplexer using MOS transmission gates with on-chip binary decoder. Its three address inputs (A, B, C) select one of eight bidirectional channels to connect to the common I/O terminal (COM), while the INH input forces all switches OFF when high. All logic thresholds are referenced to VSS, and analog signals swing from VEE to VDD.

Switching performance is defined by propagation delays ≤240 ns (address-to-output, VDD–VEE = 15 V), –3 dB bandwidth up to 60 MHz (channel ON), and feedthrough <12 mV peak at –40 dB rejection. Distortion remains below 0.5 % THD at 1 kHz with 5 V_PP input and 10 kΩ load.

Key Specifications

Parameter	Value and Actual Design Meaning
ON Resistance (R_ON)	125 Ω typ. at VDD–VEE = 15 V - ensures minimal signal attenuation and voltage drop in precision analog paths
Channel Leakage (OFF)	±100 pA typ. at VDD–VEE = 18 V - preserves signal integrity in high-impedance sensor interfaces
Signal Range	Up to 20 V_PP analog swing - supports rail-to-rail analog signals across extended supply configurations
Supply Range (VDD–VSS)	3 V to 20 V - enables direct interface with 3.3 V, 5 V, and 15 V logic and analog subsystems
Operating Temp	–55 °C to +125 °C - qualified for under-hood automotive and industrial environments
Quiescent Current	0.04 μA typ. at VDD = 5 V - enables ultra-low-power standby in battery-backed systems
ESD Rating (HBM)	2 kV - provides robust handling during PCB assembly and system integration

Pinout & Package

Packaged in 16-pin plastic dual in-line (PDIP-16) with 0.25-inch body width, 2.54 mm lead pitch, and through-hole mounting compatibility.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 4, 5, 12, 13, 14, 15	Channel Inputs/Outputs (0–7)	Bidirectional analog terminals; each connects to COM when selected, otherwise isolated
3	COM (Common I/O)	Shared analog path for all channels; serves as input during mux mode, output during demux mode
6	INH (Inhibit)	Active-high enable/disable control; forces all channels OFF regardless of address state
9, 10, 11	A, B, C (Address Inputs)	Binary-coded channel selector (CBA = 000 → channel 0, CBA = 111 → channel 7)
7	VEE	Negative analog supply rail - sets lower bound of analog signal range
8	VSS	Digital ground reference - defines logic "0" level and bias point for control circuitry
16	VDD	Positive supply rail - powers internal logic and defines logic "1" level and upper analog limit

Key Features

Feature	Design Value
On-chip binary decoding	Eliminates external logic for 3-bit address interpretation - reduces BOM count and layout area
Matched R_ON tracking	ΔR_ON ≤ 5 Ω typ. between any two channels - ensures consistent gain and offset across multiplexed channels
Low distortion	< 0.5 % THD at 1 kHz, 5 V_PP, 10 kΩ load - maintains fidelity in audio and sensor signal chains
Wide supply compatibility	Supports VDD–VSS = 3–20 V and VDD–VEE = up to 20 V - simplifies mixed-voltage system integration
High OFF isolation	Channel leakage ≤ ±100 pA at 18 V - prevents crosstalk in high-resolution measurement systems

Applications

Automotive Sensor Hub

Industrial Data Logger

Use Scenario: Aggregating analog outputs from multiple temperature, pressure, and position sensors in engine control units.

IC Role / Device Role / Timing Role: Analog multiplexer routing sensor signals to a shared ADC input under microcontroller address control.

Use Value: Enables 8-sensor monitoring with single ADC channel, reducing component count and PCB footprint while maintaining –40 °C to +125 °C operational reliability.

Use Scenario: Sampling analog process variables (voltage, current, thermocouple) across distributed field nodes in factory automation.

IC Role / Device Role / Timing Role: Channel selector for multi-point analog acquisition, synchronized with sampling clock and controller firmware.

Use Value: Provides <125 Ω R_ON and <0.5 % distortion to preserve measurement accuracy across 16-bit ADC systems operating at 1 kHz update rates.

Test Equipment Signal Routing

Consumer Audio Switching

Use Scenario: Reconfigurable signal path selection in benchtop multimeters and automated test fixtures.

IC Role / Device Role / Timing Role: Bidirectional analog switch enabling flexible stimulus/response routing between DUT and instrumentation ports.

Use Value: Supports 20 V_PP signal swing and 60 MHz bandwidth to handle both DC precision measurements and AC waveform analysis without external amplification.

Use Scenario: Input source selection (phono, line, mic) and output routing (headphone, speaker, aux) in portable audio mixers.

IC Role / Device Role / Timing Role: Low-noise analog multiplexer managing signal paths with minimal THD and crosstalk between audio sources.

Use Value: Delivers <0.5 % distortion at 1 kHz and ±100 pA leakage to prevent audible artifacts and channel bleed in battery-powered devices.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
CD4051BE	Same pinout and function but rated only to +85 °C; no AEC-Q100 qualification; higher R_ON (200 Ω typ. at 15 V)	Limited to commercial/industrial ambient conditions; not suitable for under-hood automotive use	Select when cost sensitivity outweighs extended temperature and automotive compliance requirements
ADG1408BRUZ	CMOS process; 4.7 Ω R_ON; requires separate V_LOGIC and V_ANALOG supplies; no VEE support	Superior R_ON and bandwidth (170 MHz), but lacks negative rail capability and operates only down to –40 °C	Prefer for high-speed, low-distortion applications where bipolar analog range is unnecessary and temperature range is less demanding

Compared with CD4051BE and ADG1408BRUZ, the HCF4051BEY uniquely combines automotive-grade temperature range (–55 °C to +125 °C), VEE-supported bipolar analog operation, and AEC-Q100 alignment-making it the only choice for legacy-compatible, wide-range analog multiplexing in harsh environments.

Availability

HCF4051BEY is available at Aetrix Electronics and suitable for automotive sensor hubs, industrial data loggers, test equipment signal routing, and consumer audio switching requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for HCF4051BEY 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power ICs, analog chips, and MEMS sensors for industrial, automotive, and consumer markets.

The HCF4051BEY belongs to ST's legacy high-voltage CMOS analog switch family, engineered for robustness in mixed-signal systems requiring wide supply tolerance, high channel isolation, and extended temperature operation.

FAQ

Can HCF4051BEY operate with VDD = 5 V and VEE = –12 V?

Yes. With VDD = 5 V and VEE = –12 V, the device supports analog signals from –12 V to +5 V (17 V_PP). The datasheet confirms operation at VDD–VEE = 17 V, and specifies that VDD–VSS ≥ 4.5 V is required for VDD–VEE > 13 V - satisfied here since VSS = 0 V.

What is the maximum frequency for clean signal switching without significant attenuation?

The –3 dB bandwidth is 60 MHz when routing signals through an enabled channel (measured at COM terminal). For sine-wave signals up to 1 MHz, distortion remains below 0.5 % with 5 V_PP input and 10 kΩ load, making it suitable for audio and medium-speed data acquisition.

Does the INH pin require pull-down resistors in microcontroller-driven systems?

No external pull-down is required. When left unconnected, the INH input has internal protection diodes and exhibits leakage <±0.1 μA. However, for deterministic startup behavior, tie INH to VSS via a 10 kΩ resistor if the MCU GPIO is high-impedance during reset.

How does channel matching affect precision measurement systems?

ΔR_ON ≤ 5 Ω (typ.) between any two channels minimizes gain mismatch across multiplexed sensor paths. In a 12-bit system with 10 kΩ source impedance, this contributes <0.05 % full-scale error - well within typical calibration tolerances for industrial transducers.

HCF4051BEY Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Packaging:: Tube

Product Status:: Obsolete

Switch Circuit:: -

Multiplexer/Demultiplexer Circuit:: 8:1

Number of Circuits:: 1

On-State Resistance (Max):: 280Ohm

Channel-to-Channel Matching (ΔRon):: 5Ohm

Voltage - Supply, Single (V+):: 3V ~ 20V

Voltage - Supply, Dual (V±):: -

Switch Time (Ton, Toff) (Max):: -

-3db Bandwidth:: 60MHz

Charge Injection:: -

Channel Capacitance (CS(off), CD(off)):: 0.2pF, 5pF

Current - Leakage (IS(off)) (Max):: 100nA

Crosstalk:: -40dB @ 3MHz

Operating Temperature:: -55°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 16-PDIP

HCF4051BEY FAQ

1.How can I place an order for HCF4051BEY through Aetrix?

Please submit a Request for Quotation (RFQ) for HCF4051BEY on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for HCF4051BEY reliable?

The price and inventory of HCF4051BEY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HCF4051BEY is usually 5 days.

3.What payment methods are accepted for HCF4051BEY?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HCF4051BEY transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for HCF4051BEY?

HCF4051BEY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your HCF4051BEY order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for HCF4051BEY?

For technical support, including HCF4051BEY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HCF4051BEY requirements.

6.How does Aetrix verify that HCF4051BEY is sourced from the original manufacturer or authorized distributors?

All HCF4051BEY products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that HCF4051BEY meets industry standards.

7.What is the process for return or replacement of HCF4051BEY?

All HCF4051BEY units undergo pre-shipment inspection (PSI). If there is an issue with HCF4051BEY, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The HCF4051BEY part is unused and in its original packaging.

Return procedure for HCF4051BEY:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…