STMicroelectronics HCF4076BEY

Overview

HCF4076BEY from STMicroelectronics is a 4-bit D-type register IC with three-state outputs, buffered inputs/outputs, and independent data and output disable controls. It operates from 3V to 20V supply, features 100 nA max input leakage at 18 V, supports clock frequencies up to 16 MHz (at VDD = 15 V), and is packaged in 16-pin plastic DIP for through-hole mounting. It is used in digital bus interface and data latching applications requiring output isolation.

For engineers reviewing the HCF4076BEY datasheet, HCF4076BEY pinout, HCF4076BEY application, or HCF4076BEY equivalent, key selection considerations include its dual data-disable control logic, independent high-impedance output enable via M/N pins, reset functionality, and guaranteed quiescent current testing across 5V/10V/15V/20V operating conditions.

Technical Context

The HCF4076BEY implements four edge-triggered D-type flip-flops synchronized to the rising edge of the clock input (Pin 7), with asynchronous active-low reset (Pin 15) that forces all Q outputs low regardless of clock or data state. Data loading is controlled by two active-low Data Disable inputs (G1, G2 on Pins 10 and 9): only when both are low does the next clock edge transfer D-inputs (Pins 11–14) to Q outputs.

Output enable is fully independent of clock and data paths: either Output Disable input (M on Pin 1, N on Pin 2) asserted high places the corresponding Q output in high-impedance state, preserving internal flip-flop state and allowing bus sharing without contention. All inputs and outputs are buffered to improve noise immunity and drive capability.

Key Specifications

Pinout & Package

Package: 16-pin plastic Dual In-line Package (DIP), 0.3-inch body width, standard through-hole mounting (MECHANICAL DATA P001C).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 4-bit D-type register with three-state output applications.

Compared with CD4076BE and 74HC173PW, the HCF4076BEY uniquely combines 3–20 V operation, per-output three-state control, and JEDEC-verified low IDD-making it the only choice for robust, voltage-flexible bus interface in harsh or legacy environments.

Availability

HCF4076BEY is available at Aetrix Electronics and suitable for industrial bus interface, digital test equipment, legacy system upgrades, and programmable logic glue applications requiring stable component supply and long-term obsolescence mitigation.

Supply support for HCF4076BEY 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 analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

The HCF4076BEY belongs to ST's legacy HCMOS B-series logic family, engineered for backward compatibility with 4000-series devices while delivering improved speed, noise immunity, and supply voltage flexibility for industrial control and instrumentation.

FAQ

Is HCF4076BEY pin-compatible with CD4076BE?

Yes, HCF4076BEY uses identical pin numbering and function mapping as CD4076BE, including D1–D4, Q1–Q4, CLOCK, RESET, G1/G2, and M/N. Both share DIP-16 packaging and JEDEC-standard footprint, enabling drop-in replacement in existing layouts without PCB revision.

What is the maximum safe supply voltage for continuous operation?

The absolute maximum supply voltage is +22 V, but the recommended operating range is 3 V to 20 V per datasheet Section 3. Operation above 20 V risks exceeding specified DC parameters and may accelerate long-term parametric drift, especially at elevated temperatures.

Can both Output Disable inputs (M and N) be used simultaneously?

Yes - asserting either M (Pin 1) or N (Pin 2) high disables its respective Q output (Q1 or Q2) into high-impedance. Both can be asserted together to isolate Q1 and Q2 simultaneously, while Q3 and Q4 remain active if their disable pins are low - enabling partial bus masking.

Does the RESET input override the Output Disable state?

No - RESET (Pin 15, active-low) forces all Q outputs to logic low but does not affect their three-state status. If M or N is high, the corresponding Q remains in high-impedance even after reset; only driving M/N low restores active output states.