STMicroelectronics HCF4041UBEY

Overview

HCF4041UBEY from STMicroelectronics is a quad true/complement buffer IC in 14-pin DIP package, delivering balanced sink and source current (~4× standard B-series drive), equalized propagation delay between true and complement outputs, and quiescent current specified up to 20 V. It serves as a CMOS-to-TTL line driver, A/D-D/A resistor network driver, and transmission line interface in low-power, high-noise-immunity systems.

For engineers reviewing the HCF4041UBEY datasheet, HCF4041UBEY pinout, HCF4041UBEY application, or HCF4041UBEY equivalent, key selection criteria include its symmetrical output characteristics at 5/10/15 V supply, ±100 nA input leakage at 18 V, 25–120 ns propagation delay (VDD = 5–15 V), and dual-output per channel architecture enabling simultaneous true/complement signal distribution.

Technical Context

The HCF4041UBEY integrates four independent CMOS buffer pairs-each with matched n- and p-channel output transistors-ensuring identical tPLH/tPHL delays for true and complement outputs across all supply voltages (3–20 V). Its design eliminates skew-sensitive timing paths in differential signaling and level-shifting interfaces.

It operates with standardized symmetrical VOH/VOL (e.g., VOH ≥ 4.95 V at VDD = 5 V, VOL ≤ 0.05 V), supports wide temperature range (−55°C to +125°C), and meets JEDEC JESD13B for B-series CMOS devices, confirming compatibility with legacy 4000-series logic families and noise margin requirements (≥2.5 V at 15 V).

Key Specifications

Pinout & Package

Package: Plastic DIP-14 (dual in-line package), 20.0 mm × 8.5 mm body, 2.54 mm lead pitch, through-hole mount.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad true/complement buffer applications.

Compared with CD4041BE and 74HC4041D, the HCF4041UBEY uniquely combines 15 V operation, matched true/complement delay, and 4× B-series drive-making it irreplaceable in mixed-voltage industrial interfaces where timing integrity and noise immunity are non-negotiable.

Availability

HCF4041UBEY is available at Aetrix Electronics and suitable for industrial sensor interfaces, CMOS-to-TTL bus driving, digital potentiometer control, and transmission line termination requiring stable component supply across extended temperature and voltage ranges.

Supply support for HCF4041UBEY 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, specializing in automotive, industrial, and power management solutions with broad analog, MCU, and discrete portfolios.

The HCF4041UBEY belongs to ST's legacy HCF4000B series of radiation-hardened, high-voltage CMOS logic devices-designed specifically for reliability-critical industrial control, test equipment, and aerospace-adjacent applications demanding wide VDD tolerance and long-term stability.

FAQ

Is HCF4041UBEY pin-compatible with CD4041BE?

Yes, HCF4041UBEY shares identical pinout, truth table, and functional behavior with CD4041BE. Both use 14-pin DIP packaging and deliver quad true/complement buffering. However, HCF4041UBEY offers superior drive strength (−12.8 mA/+38 mA vs. −4.2 mA/+8.4 mA at 15 V) and tighter delay matching, making it a performance upgrade-not just a drop-in replacement-in demanding applications.

What is the maximum operating temperature for HCF4041UBEY?

The HCF4041UBEY is rated for continuous operation from −55°C to +125°C. This extended temperature range is validated per JEDEC JESD13B and confirmed by ST's characterization data across all electrical parameters-including quiescent current, VOH/VOL, and propagation delay-ensuring reliability in under-hood automotive modules and industrial PLC environments.

Can HCF4041UBEY drive a 50 Ω transmission line directly?

Yes, at VDD = 15 V, HCF4041UBEY delivers up to +38 mA sink and −12.8 mA source current, sufficient to drive a 50 Ω line terminated to VDD/2. Measured tPLH/tPHL remains ≤50 ns with CL = 50 pF, supporting clean edge rates for <10 Mbps differential signaling without external buffers or line drivers.

Does HCF4041UBEY require external pull-up resistors on outputs?

No. The device features push-pull CMOS outputs with symmetrical VOH/VOL (e.g., VOH ≥ 4.95 V, VOL ≤ 0.05 V at VDD = 5 V), eliminating the need for external pull-ups in standard logic interfacing. Pull-ups are only required if open-drain emulation or wired-OR logic is intentionally implemented-outside the device's native specification.