STMicroelectronics HCF4070BEY

Overview

HCF4070BEY from STMicroelectronics is a quad exclusive OR (XOR) gate IC in SO-14 package, designed for digital logic implementation in discrete combinational circuits. It delivers tPHL/tPLH = 70 ns (typ) at VDD = 10 V and CL = 50 pF, supports 3–20 V supply range, and provides four independent XOR functions with VIH/VIL thresholds of 7 V / 3 V at 10 V supply - used in parity checking, binary adder carry logic, and comparator-based fault detection.

For engineers reviewing the HCF4070BEY datasheet, HCF4070BEY pinout, HCF4070BEY application, or HCF4070BEY equivalent, key selection factors include its automotive-grade temperature range (–40 °C to +125 °C), 100 nA max input leakage at 18 V, 2 kV HBM ESD rating, and compatibility with legacy 4000-series CMOS logic families in mixed-voltage systems.

Technical Context

The HCF4070BEY implements four independent two-input XOR gates using silicon-gate CMOS technology, enabling direct Boolean expression realization without external inversion. Each gate exhibits rail-to-rail output swing, noise margins of ≥2 V at VDD = 10 V, and symmetrical propagation delays (tPLH ≈ tPHL) across all supply voltages from 5 V to 15 V.

It operates within –40 °C to +125 °C ambient, meets AEC-Q100 Grade 1 requirements, and features guaranteed quiescent current testing up to 20 V. Input structure includes protection diodes and clamping networks validated for 2 kV HBM ESD robustness, supporting reliable use in industrial control backplanes and automotive body electronics.

Key Specifications

Pinout & Package

Package: SO-14 (Small Outline, 14-pin, ECOPACK® compliant, body width 3.9 mm, pitch 1.27 mm).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar XOR gate applications.

Compared with CD4070BE and 74HC86DR, HCF4070BEY uniquely balances automotive qualification, 3–20 V operation, and sub-100 ns timing - making it optimal for mixed-supply vehicle subsystems where reliability and voltage adaptability are non-negotiable.

Availability

HCF4070BEY is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC I/O expansion, and consumer appliance logic sequencing requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for HCF4070BEY 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, sensors, and analog/mixed-signal devices for industrial, automotive, and consumer markets.

HCF4070BEY belongs to the HCF4000 series of high-voltage CMOS logic ICs, engineered specifically for robust operation in harsh environments where wide supply range, ESD resilience, and extended temperature stability are critical design requirements.

FAQ

Is HCF4070BEY pin-compatible with CD4070BE?

Yes - both devices use identical SO-14 pinout and logic function mapping: pins 1/2 → output 3, pins 5/6 → output 4, pins 8/9 → output 10, pins 12/13 → output 11, with VSS on pin 7 and VDD on pin 14. No PCB redesign is needed for drop-in replacement in non-automotive applications.

What is the maximum operating frequency for HCF4070BEY at 15 V supply?

At VDD = 15 V and CL = 50 pF, the typical propagation delay is 50 ns (tPLH/tPHL), supporting reliable operation up to ~10 MHz for single-gate toggling. For multi-stage logic, derate by 20% due to cumulative delay and output loading effects.

Does HCF4070BEY support 3.3 V logic interfacing?

No - minimum recommended VDD is 3 V, but VIH threshold at 3 V supply is only ~1.5 V, resulting in marginal noise immunity (<0.5 V). For 3.3 V systems, use 74LVC86 or similar LVCMOS devices; HCF4070BEY is intended for ≥5 V operation.

Can HCF4070BEY drive an LED directly?

Yes - with appropriate current-limiting resistor. At VDD = 10 V and IOL = 0.9 mA, it can sink up to ~0.9 mA. For a standard 2 mA LED, use a 4.7 kΩ resistor from VDD to anode and connect cathode to an output pin; verify VOL remains ≤0.05 V under load.