Overview
The CD4017BCN, produced by onsemi, is a CMOS decade counter/divider integrated circuit. It is widely used in digital applications for counting and sequential control. The device features 10 decoded outputs and a carry-out signal, making it suitable for various timing and control tasks. Its market positioning targets hobbyists, educators, and engineers working on digital circuits, particularly in applications like LED sequencers, frequency dividers, and pulse distribution systems. The CD4017BCN stands out for its simplicity, reliability, and versatility in low-power digital designs.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Supply Voltage | 3 to 15 | V | |
| Operating Temperature | -40 to 85 | °C | |
| Clock Frequency | Up to 5 | MHz | |
| Output Current | 10 | mA | Max per output |
| Package | DIP-16 | Plastic dual in-line | |
| Decoded Outputs | 10 | Q0 to Q9 | |
| Carry Output | 1 | Q5-9 (Pin 12) | |
| Reset Input | 1 | MR (Pin 15) | |
| Clock Inputs | 2 | CP0 (Pin 14), ~CP1 (Pin 13) | |
| Power Dissipation | 500 | mW | Max |
Key Features
- Decade counting with 10 decoded outputs for sequential control.
- Built-in carry-out signal for cascading multiple counters.
- Schmitt trigger clock inputs for noise immunity and flexible pulse shaping.
- Wide operating voltage range (3V to 15V) for compatibility with various power supplies.
- Low power consumption, making it suitable for battery-operated devices.
- Simple reset functionality for immediate initialization of the counter.
Applications
The CD4017BCN is commonly used in applications such as LED chasers, frequency dividers, and sequential control systems. It is ideal for hobbyist projects like running lights, electronic dice, and quiz buzzers. In industrial settings, it can be employed in timing circuits, event counters, and pulse distribution systems. Its versatility also extends to educational demonstrations of digital logic and counting principles.
Q & A
1. What is the maximum clock frequency for the CD4017BCN?
The CD4017BCN can operate at clock frequencies up to 5 MHz.
2. How does the reset function work?
Applying a high-level signal to the MR (Master Reset) pin clears the counter, setting Q0 to high and all other outputs to low.
3. Can the CD4017BCN be cascaded?
Yes, the carry-out signal (Q5-9) can be used to clock additional CD4017BCN ICs for extended counting ranges.
4. What is the purpose of the two clock inputs?
The two clock inputs (CP0 and ~CP1) allow for flexibility in counting on either the rising or falling edge of the clock signal.
5. What is the operating voltage range?
The CD4017BCN operates from 3V to 15V, making it compatible with a wide range of power supplies.
6. How many outputs does the CD4017BCN have?
It has 10 decoded outputs (Q0 to Q9) and one carry-out output (Q5-9).
7. What is the typical power consumption?
The CD4017BCN has low power consumption, with a static current of 0.04 µA.
8. What is the package type?
It is available in a 16-pin DIP (Dual In-line Package).
9. Can it drive LEDs directly?
Yes, each output can sink up to 10 mA, making it suitable for driving LEDs directly.
10. What is the role of the Schmitt trigger in the clock inputs?
The Schmitt trigger ensures noise immunity and allows for flexible pulse shaping, making the device robust in noisy environments.
