Overview
The CD4017AK, produced by Harris Corporation, is a CMOS-based 5-stage Johnson counter with 10 decoded outputs. This integrated circuit is widely recognized for its ability to perform decimal counting and pulse distribution, making it a versatile component in various electronic applications. The CD4017AK is particularly valued for its ease of use, reliability, and compact design, which make it suitable for both hobbyist projects and industrial applications. Its ability to handle sequential operations with minimal external components positions it as a cost-effective solution for tasks requiring precise timing and control.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Supply Voltage | 3 to 15 | V | |
| Operating Temperature | -40 to 85 | °C | |
| Static Current | 0.04 | µA | |
| Clock Frequency | Up to 2.5 | MHz | Typical |
| Output Current | ±10 | mA | |
| Package Type | DIP-16, SOP-16, TSSOP-16 |
Key Features
- 10 decoded outputs for sequential control.
- Integrated Johnson counter for reliable counting operations.
- Schmitt trigger on clock input for noise immunity.
- Carry output for cascading multiple counters.
- Wide operating voltage range (3V to 15V).
- Low power consumption, suitable for battery-operated devices.
Applications
The CD4017AK is extensively used in applications requiring sequential control and timing. Common applications include LED chasers, light displays, and sequential switching circuits. It is also employed in frequency dividers, event counters, and timing circuits in consumer electronics, industrial automation, and educational projects. Its ability to drive multiple outputs sequentially makes it ideal for creating dynamic visual effects in displays and indicators.
Q & A
1. What is the maximum clock frequency for CD4017AK?
The CD4017AK can operate at a maximum clock frequency of up to 2.5 MHz under typical conditions.
2. Can CD4017AK be used in battery-powered devices?
Yes, its low static current consumption of 0.04 µA makes it suitable for battery-powered applications.
3. How does the carry output function in CD4017AK?
The carry output provides a pulse after every 10 clock cycles, which can be used to cascade multiple CD4017AK counters.
4. What is the purpose of the Schmitt trigger on the clock input?
The Schmitt trigger ensures noise immunity by providing a clean clock signal, even in the presence of noisy inputs.
5. Can CD4017AK handle negative voltages?
No, the CD4017AK operates with a positive supply voltage ranging from 3V to 15V.
6. What are the common package types for CD4017AK?
It is available in DIP-16, SOP-16, and TSSOP-16 packages.
7. How does the reset function work in CD4017AK?
Applying a high level to the reset pin clears the counter, setting all outputs to low except Q0.
8. Is CD4017AK suitable for high-temperature environments?
Yes, it operates reliably in temperatures ranging from -40°C to 85°C.
9. Can CD4017AK be used in frequency division applications?
Yes, it can divide the input clock frequency by 10, making it useful in frequency division circuits.
10. What are the typical applications of CD4017AK?
Typical applications include LED chasers, sequential switching, frequency dividers, and timing circuits.
