CD74HC390M

Product Overview

• Category: Integrated Circuit (IC)
• Use: Digital Counter
• Characteristics: High-Speed, Dual 4-Bit Decade Counter
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: The CD74HC390M is a dual 4-bit decade counter that can count up to 99. It is commonly used in digital circuits for counting applications.
• Packaging/Quantity: The CD74HC390M is available in tape and reel packaging with a quantity of 2500 units per reel.

Specifications

• Supply Voltage: 2V to 6V
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay: 13 ns (typical)
• Input Capacitance: 3.5 pF (typical)
• Output Current: ±6 mA (maximum)

Pin Configuration

The CD74HC390M has a total of 16 pins. Here is the detailed pin configuration:

1. Q0A
2. Q1A
3. Q2A
4. Q3A
5. GND
6. Q3B
7. Q2B
8. Q1B
9. Q0B
10. MR (Master Reset)
11. CP (Clock Pulse)
12. CE (Count Enable)
13. TC (Terminal Count)
14. VCC (Supply Voltage)
15. Q0
16. Q1

Functional Features

• Dual 4-bit decade counter with separate clock inputs
• Can count up to 99
• Master reset function to clear the counter
• Terminal count output for cascading multiple counters
• High-speed operation suitable for time-critical applications
• Low power consumption

Advantages and Disadvantages

Advantages: - High-speed operation allows for quick counting - Dual counter design provides flexibility in applications - Low power consumption helps conserve energy - Terminal count output enables cascading multiple counters

Disadvantages: - Limited counting range (up to 99) - Requires external clock and control signals for proper operation - Sensitive to voltage fluctuations

Working Principles

The CD74HC390M operates based on the principles of digital counting. It utilizes clock pulses to increment the count and has separate clock inputs for each 4-bit counter. The master reset function allows the counter to be cleared to zero. The terminal count output can be used to cascade multiple counters for extended counting ranges.

Detailed Application Field Plans

The CD74HC390M is commonly used in various applications, including:

1. Digital frequency dividers
2. Event counters
3. Timekeeping circuits
4. Industrial automation systems
5. Electronic games and toys

Detailed and Complete Alternative Models

Here are some alternative models that can be considered as alternatives to the CD74HC390M:

1. CD4017: Decade counter with 10 outputs
2. SN74LS90: Decade counter with asynchronous clear
3. CD4029: Presettable up/down counter
4. CD4510: BCD up/down counter with presettable load

These alternative models offer similar functionality and can be used as replacements depending on specific requirements.

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