Overview
The HCF4017B, also known as the HCF4017M013TR, is a monolithic integrated circuit fabricated in Metal Oxide Semiconductor (MOS) technology. It is a 5-stage Johnson decade counter with 10 decoded outputs, available in DIP and SOP packages. This counter is designed for medium-speed operation and features fully static operation, making it suitable for a variety of digital counting applications. The HCF4017B includes inputs for CLOCK, RESET, and CLOCK INHIBIT, and it provides a CARRY OUT signal for cascading multiple counters. The device is part of STMicroelectronics' CMOS logic family and meets the requirements of JEDEC JESD13B standard specifications for B series CMOS devices.
Key Specifications
| Parameter | Value | Unit | Conditions |
|---|---|---|---|
| Supply Voltage (VDD) | 3 to 20 | V | |
| Input Voltage (VI) | 0 to VDD + 0.5 | V | |
| Quiescent Current (IL) | 0.04 to 3.0 | µA | VDD = 5V to 20V, TA = 25°C |
| High Level Output Voltage (VOH) | 4.95 to 14.95 | V | VDD = 5V to 15V, IOH = -1.36 to -6.8 mA |
| Low Level Output Voltage (VOL) | 0.05 | V | VDD = 5V to 15V, IOL = 0.44 to 6.8 mA |
| High Level Input Voltage (VIH) | 3.5 to 11 | V | VDD = 5V to 15V |
| Low Level Input Voltage (VIL) | 1.5 to 4 | V | VDD = 5V to 15V |
| Propagation Delay Time (decode out) | 85 to 650 ns | ns | VDD = 5V to 15V, CL = 50pF, RL = 200KΩ |
| Maximum Clock Input Frequency | 2.5 to 11 MHz | MHz | VDD = 5V to 15V |
| Top Operating Temperature | -55 to 125 °C | °C |
Key Features
- Medium Speed Operation: Up to 10 MHz at VDD = 10V.
- Fully Static Operation: No clock pulse is required for operation.
- Standardized Symmetrical Output Characteristics: Ensures consistent output behavior.
- Quiescent Current Specified: Up to 20V, ensuring low power consumption.
- Schmitt Trigger Action: In the clock input circuit, allowing unlimited clock input pulse rise and fall times.
- Anti-lock Gating: Ensures proper counting sequence.
- Decoded Outputs: 10 decoded outputs that are normally low and go high only at their respective decoded time slot.
- Carry Out Signal: Completes one cycle every 10 clock input cycles, useful for cascading counters.
Applications
- Divide by N Counters: Can be used to create divide by N counters with decoded outputs, where N is less than 10.
- Multi-Device Counting Chains: The CARRY OUT signal can ripple-clock the succeeding device in a multi-device counting chain.
- Digital Counting Systems: Suitable for various digital counting applications due to its medium-speed operation and fully static design.
- Timing and Control Circuits: Can be used in timing and control circuits where precise counting and decoding are required.
Q & A
- What is the HCF4017B?
The HCF4017B is a 5-stage Johnson decade counter with 10 decoded outputs, fabricated in Metal Oxide Semiconductor (MOS) technology.
- What are the package options for the HCF4017B?
The HCF4017B is available in DIP and SOP packages.
- What is the maximum clock input frequency for the HCF4017B?
The maximum clock input frequency ranges from 2.5 MHz to 11 MHz, depending on the supply voltage (VDD).
- How does the CLOCK INHIBIT signal function?
The CLOCK INHIBIT signal inhibits the counter from advancing when it is high. When it is low, the counter advances one count at the positive clock signal transition.
- 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 is the quiescent current specification for the HCF4017B?
The quiescent current is specified up to 20V, ranging from 0.04 µA to 3.0 µA depending on the supply voltage.
- What are the operating temperature ranges for the HCF4017B?
The top operating temperature range is -55 to 125 °C.
- How does the RESET signal function?
A high RESET signal clears the counter to its zero count.
- What is the significance of Schmitt trigger action in the clock input circuit?
The Schmitt trigger action provides pulse shaping, allowing unlimited clock input pulse rise and fall times.
- Can the HCF4017B be used in life support devices or systems?
No, the HCF4017B is not authorized for use as critical components in life support devices or systems without express written approval from STMicroelectronics.
- Is the HCF4017M013TR still in production?
No, the HCF4017M013TR is obsolete and no longer manufactured by STMicroelectronics.
