CD4518BCN

Product Overview

• Category: Integrated Circuit (IC)
• Use: Binary Counter/Divider
• Characteristics:
  • 16-pin dual in-line package (DIP)
  • CMOS technology
  • Wide operating voltage range: 3V to 18V
  • Low power consumption
  • High noise immunity
• Package: Plastic DIP
• Essence: The CD4518BCN is a CMOS binary counter/divider IC that can count up or down depending on the input signals.
• Packaging/Quantity: Available in tubes of 25 pieces.

Specifications

• Supply Voltage Range: 3V to 18V
• Counting Range: 0 to 9 (Decimal)
• Maximum Clock Frequency: 5 MHz
• Operating Temperature Range: -55°C to +125°C
• Input Current: ±1μA (maximum)
• Output Current: ±2.5mA (maximum)

Pin Configuration

The CD4518BCN has a total of 16 pins, which are assigned specific functions as follows:

1. Pin 1: Clock Enable (CE)
2. Pin 2: Clock Input (CP)
3. Pin 3: Down/Up Control (UP/DN)
4. Pin 4: Reset (RST)
5. Pin 5: Carry Out (CO)
6. Pin 6: BCD Output 0 (Q0)
7. Pin 7: BCD Output 1 (Q1)
8. Pin 8: BCD Output 2 (Q2)
9. Pin 9: BCD Output 3 (Q3)
10. Pin 10: BCD Output 4 (Q4)
11. Pin 11: BCD Output 5 (Q5)
12. Pin 12: BCD Output 6 (Q6)
13. Pin 13: BCD Output 7 (Q7)
14. Pin 14: VSS (Ground)
15. Pin 15: Carry-In (CI)
16. Pin 16: VDD (Supply Voltage)

Functional Features

• Binary counting: The CD4518BCN can count up or down in binary, depending on the input signals.
• Clock enable: The CE pin allows the clock input to be enabled or disabled.
• Reset function: The RST pin resets the counter to its initial state.
• Carry-in and carry-out: The CI and CO pins allow cascading multiple counters for larger counting ranges.
• Noise immunity: The CMOS technology used in the IC provides high noise immunity.

Advantages and Disadvantages

Advantages: - Wide operating voltage range allows flexibility in various applications. - Low power consumption makes it suitable for battery-powered devices. - High noise immunity ensures reliable operation even in noisy environments.

Disadvantages: - Limited counting range from 0 to 9 may not be sufficient for certain applications requiring larger counts. - The DIP package may not be suitable for space-constrained designs.

Working Principles

The CD4518BCN operates based on the principle of binary counting. It has two modes of operation: up-counting and down-counting. The UP/DN pin determines the counting direction, while the CP pin provides the clock input. When the clock signal is applied, the counter increments or decrements based on the counting direction. The outputs represent the binary-coded decimal (BCD) values of the current count.

Detailed Application Field Plans

The CD4518BCN is commonly used in various applications, including:

1. Digital frequency counters
2. Industrial automation systems
3. Electronic voting machines
4. Traffic light control systems
5. Sequential logic circuits

Detailed and Complete Alternative Models

1. CD4518BE: Similar to CD4518BCN, but in a 16-pin DIP package with extended temperature range.
2. CD74HC4518E: High-speed CMOS version of the CD4518BCN with improved performance.

These alternative models offer similar functionality and can be used as replacements for the CD4518BCN in different applications.

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