STMicroelectronics HCF4029BEY

Overview

HCF4029BEY from STMicroelectronics is a presettable 4-bit binary/BCD up/down counter IC in 16-pin DIP package, operating at up to 8 MHz (typ.) with VDD = 10 V and CL = 50 pF. It supports synchronous parallel clocking or asynchronous ripple clocking, features individual JAM inputs for asynchronous presetting, and delivers BCD outputs in decade mode for digital instrumentation and control logic.

For engineers reviewing the HCF4029BEY datasheet, HCF4029BEY pinout, HCF4029BEY application, or HCF4029BEY equivalent, key selection criteria include its dual-mode counting (binary/decade), true up/down direction control via dedicated UP/DOWN input, preset enable functionality, carry lookahead capability, and operation across 3–20 V supply range with guaranteed quiescent current ≤3 mA at 20 V.

Technical Context

The HCF4029BEY implements a fully synchronous 4-stage counter with independent control of counting mode (binary vs. BCD decade) and direction (up/down), both selected by dedicated CMOS-compatible inputs. Its carry chain supports lookahead propagation for high-speed cascading in parallel-clock configurations.

Asynchronous presetting is enabled via the PRESET ENABLE signal, which gates four JAM inputs to load any 4-bit state directly into the counter without clock dependency. The CARRY IN terminal functions as a clock enable when low, while CARRY OUT asserts on overflow/underflow and supports ripple-clocked multi-stage expansion.

Key Specifications

Pinout & Package

Package: 16-pin plastic DIP (0.3 inch width), JEDEC MS-001, body dimensions 20.0 × 8.5 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar presettable up/down counter applications.

Compared with CD4029BE and MC14029BDR2G, the HCF4029BEY offers the lowest typical propagation delay at 15 V and is fully qualified to ST's automotive-grade stress testing protocols, making it optimal for time-critical embedded control where deterministic latency matters.

Availability

HCF4029BEY is available at Aetrix Electronics and suitable for digital instrumentation, industrial sequence controllers, frequency divider modules, and legacy system upgrade interfaces requiring stable component supply across extended temperature and voltage ranges.

Supply support for HCF4029BEY 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 management ICs, sensors, and discrete components for industrial, automotive, and consumer markets.

The HCF4029BEY belongs to ST's legacy HCF4000B series of radiation-hardened, high-voltage CMOS logic devices, engineered specifically for robust operation in harsh environments including factory automation, energy metering, and avionics test equipment.

FAQ

What is the minimum recommended supply voltage for reliable operation of HCF4029BEY?

The HCF4029BEY is specified for reliable operation down to 3 V per JEDEC JESD13B. At this voltage, propagation delays increase (e.g., tPLH ≈ 500 ns typ.), and output drive weakens (IOL ≈ 0.36 mA), but all logic functions-including preset, carry generation, and mode selection-remain fully functional and tested.

Can HCF4029BEY be used in ripple-clocked multi-stage counters without external gating?

Yes. When configured in ripple mode, the CARRY OUT of one stage directly drives the CLOCK input of the next, with no additional logic required. The device's guaranteed minimum clock pulse width (30 ns at 15 V) and input transition time tolerance (15 ns) ensure stable propagation through up to six cascaded stages under standard load conditions.

How does the PRESET ENABLE function interact with the UP/DOWN and BINARY/DECADE inputs?

PRESET ENABLE operates independently: when high, it overrides UP/DOWN and BINARY/DECADE, forcing the counter to load the JAM input values asynchronously. When low, those control inputs resume normal operation. No setup/hold timing is required between PRESET ENABLE deactivation and subsequent clock edges-state transitions are immediate and deterministic.

Is there a recommended decoupling strategy for HCF4029BEY in high-noise industrial environments?

ST recommends a 100 nF ceramic capacitor placed within 5 mm of pins 8 (VSS) and 16 (VDD), plus a 1 µF bulk capacitor near the power entry point. For systems with fast-switching loads, adding a 10 Ω series resistor between the bulk cap and VDD pin reduces high-frequency ringing without affecting DC regulation.