STMicroelectronics HCF4081BEY

Overview

HCF4081BEY from STMicroelectronics is a quad 2-input AND gate IC in CMOS technology, housed in a 14-pin DIP package. It operates across 3V–20V supply, delivers 60ns typical propagation delay at 10V, supports -55°C to +125°C operation, and provides rail-to-rail output swing - used for digital logic interfacing in industrial control panels.

For engineers reviewing the HCF4081BEY datasheet, HCF4081BEY pinout, HCF4081BEY application, or HCF4081BEY equivalent, key selection criteria include supply voltage range (3–20V), quiescent current ≤0.5µA at 10V, output drive capability (±1.1mA at 10V), noise margin (2V min. at VDD=10V), and DIP-14 mechanical compatibility with legacy through-hole PCB layouts.

Technical Context

The HCF4081BEY implements four independent AND logic functions using standard CMOS circuitry with buffered outputs. Each gate features symmetrical input thresholds (VIH = 7V, VIL = 3V at VDD = 10V) and rail-referenced switching behavior.

It supports wide-supply operation without level-shifting circuitry, exhibits low input leakage (≤100nA at 18V), and maintains stable timing performance across temperature (0.3%/°C tempco) and supply voltage variations.

Key Specifications

Pinout & Package

Package: Plastic Dual In-line Package (DIP-14), 0.3-inch body width, through-hole mounting, JEDEC MS-001 compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad 2-input AND gate applications.

Compared with CD4081BE and 74HC08N, the HCF4081BEY uniquely balances wide-supply operation (3–20V), low quiescent current (0.5µA), and moderate speed (60ns), making it optimal for industrial and automotive systems where voltage flexibility and reliability supersede raw speed.

Availability

HCF4081BEY is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, and legacy instrumentation interfaces requiring stable component supply across extended temperature and voltage ranges.

Supply support for HCF4081BEY 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, designing and manufacturing analog, digital, and mixed-signal ICs for industrial, automotive, and consumer markets.

The HCF4081BEY belongs to the HCF4000B series of radiation-hardened, wide-supply CMOS logic devices - engineered specifically for robustness in harsh-environment control and instrumentation applications.

FAQ

What is the maximum supply voltage rating for HCF4081BEY?

The absolute maximum supply voltage (VDD) is +22V, but the recommended operating range is 3V to 20V. Operation above 20V risks accelerated parametric drift and reduced long-term reliability, even if functional in short-term testing. The 20V upper limit ensures guaranteed performance per datasheet specifications including propagation delay, noise margin, and output drive.

Can HCF4081BEY drive a 100pF capacitive load reliably?

The datasheet specifies dynamic characteristics for CL = 50pF. At 100pF, propagation delay increases by approximately 30–40% and output transition time degrades proportionally - verified via test circuit simulations. For reliable 100pF operation, reduce VDD to 15V or add a small series resistor (22–47Ω) at each output to damp ringing and maintain timing integrity.

Is HCF4081BEY pin-compatible with CD4081BE?

Yes - both use identical DIP-14 pinout and logic function mapping. However, HCF4081BEY offers lower quiescent current (0.5µA vs 1µA at 10V) and faster propagation (60ns vs 90ns typ.), with identical absolute maximum ratings. No PCB redesign is needed for drop-in replacement in existing CD4081BE layouts.

Does HCF4081BEY require external pull-up resistors on its outputs?

No - the device features push-pull CMOS outputs capable of full rail-to-rail swing (VOH ≥9.95V, VOL ≤0.05V at VDD=10V). Pull-ups are unnecessary unless implementing wired-AND with open-drain devices, which is not supported by this IC's architecture. Adding pull-ups may cause shoot-through current and violate output drive specifications.