STMicroelectronics

HCF4017BEY

HCF4017BEY Description

The HCF4017BEY from STMicroelectronics is a decade counter/divider IC with 10-bit output capability, designed for high-reliability digital counting applications. Part of the 4000B series, it operates across a wide voltage range (3V to 20V), making it versatile for both low-power and industrial systems. This synchronous, up-counting device supports positive and negative edge triggering, ensuring flexibility in clock signal handling. Packaged in a 16-pin DIP (Tube), it features asynchronous reset and a high count rate of 11 MHz, suitable for timing, sequencing, and frequency division tasks.

HCF4017BEY Features

• Decade Counter Logic: Provides 10 decoded outputs (Q0-Q9) for precise state control.
• Wide Voltage Range (3V–20V): Compatible with TTL and CMOS logic levels.
• High-Speed Operation: 11 MHz count rate ensures rapid response in timing circuits.
• Dual-Edge Triggering: Supports positive or negative clock transitions for design flexibility.
• Asynchronous Reset: Immediate counter clearing without clock dependency.
• Robust Construction: ROHS3 compliant and REACH unaffected, meeting environmental standards.
• Low Sensitivity: MSL 1 (Unlimited) ensures durability in storage and handling.

HCF4017BEY Applications

• LED Sequencers/Displays: Drives multiplexed LED matrices or chase effects.
• Frequency Dividers: Divides clock signals in communication systems.
• Industrial Control Systems: Used in programmable timers and event counters.
• Automotive Electronics: Reliable in dashboard indicators and sensor interfaces.
• Consumer Electronics: Ideal for appliance timing circuits (e.g., washing machines).

Conclusion of HCF4017BEY

The HCF4017BEY stands out for its high-speed performance, wide voltage tolerance, and decade counting precision. While obsolete, its synchronous operation and robust design make it a legacy choice for low-complexity digital systems. Engineers favor it for cost-sensitive, low-frequency applications where reliability outweighs the need for modern integration. Its dual-edge triggering and asynchronous reset further enhance its utility in retrofit designs and educational prototyping.