Overview
The HCF4017BEY, produced by STMicroelectronics, is a monolithic integrated circuit that functions as a decade counter with 10 decoded outputs. Fabricated in Metal Oxide Semiconductor (MOS) technology, this IC is available in DIP and SOP packages. It operates as a 5-stage Johnson counter, providing high-speed operation and spike-free decoded outputs. The counter includes inputs for CLOCK, RESET, and CLOCK INHIBIT, and it features Schmitt trigger action in the clock input circuit for pulse shaping. This allows for unlimited clock input pulse rise and fall times, enhancing its reliability and versatility in various applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VDD) | 3 to 20 | V |
| Input Voltage (VI) | 0 to VDD + 0.5 | V |
| Operating Temperature | -55 to 125 | °C |
| Quiescent Current (IL) | 0.04 to 3.0 | µA |
| High Level Output Voltage (VOH) | 4.95 to 14.95 | V |
| Low Level Output Voltage (VOL) | 0.05 | V |
| High Level Input Voltage (VIH) | 3.5 to 11 | V |
| Low Level Input Voltage (VIL) | 1.5 to 4 | V |
| Propagation Delay Time (decode out) | 85 to 650 | ns |
| Maximum Clock Input Frequency | 2.5 to 11 | MHz |
Key Features
- 5-stage Johnson counter with 10 decoded outputs
- Schmitt trigger action in the clock input circuit for pulse shaping
- High-speed operation up to 10 MHz at VDD = 10V
- Fully static operation
- Standardized symmetrical output characteristics
- Quiescent current specified up to 20V
- Anti-lock gating for proper counting sequence
- CARRY-OUT signal for multi-device counting chains
Applications
- Divide by N counters (N < 10) with decoded outputs
- Multi-device counting chains using the CARRY-OUT signal
- Timing and sequencing circuits in digital systems
- Display drivers and indicators requiring decimal counting
- Automated control systems needing precise counting functions
Q & A
- What is the HCF4017BEY used for?
The HCF4017BEY is used as a decade counter with 10 decoded outputs, suitable for various counting and sequencing applications.
- What are the package options for the HCF4017BEY?
The HCF4017BEY is available in DIP and SOP packages.
- What is the maximum clock input frequency for the HCF4017BEY?
The maximum clock input frequency is up to 11 MHz depending on the supply voltage.
- How does the Schmitt trigger action benefit the HCF4017BEY?
The Schmitt trigger action in the clock input circuit allows for unlimited clock input pulse rise and fall times, enhancing the reliability of the counter.
- What is the purpose of the CARRY-OUT signal?
The CARRY-OUT signal completes one cycle every 10 clock input cycles and is used to ripple-clock the succeeding device in a multi-device counting chain.
- What are the operating temperature ranges for the HCF4017BEY?
The operating temperature range is from -55°C to 125°C.
- How does the anti-lock gating feature work?
The anti-lock gating feature ensures a proper counting sequence by preventing the counter from getting stuck in an invalid state.
- What is the quiescent current range for the HCF4017BEY?
The quiescent current ranges from 0.04 µA to 3.0 µA depending on the supply voltage.
- Can the HCF4017BEY be used in life support devices?
No, the HCF4017BEY is not authorized for use as critical components in life support devices or systems without express written approval from STMicroelectronics.
- What are the typical applications of the HCF4017BEY?
Typical applications include divide by N counters, multi-device counting chains, timing and sequencing circuits, display drivers, and automated control systems.
