CD74HCT390MG4

Product Overview

• Category: Integrated Circuit (IC)
• Use: Digital Counter
• Characteristics: High-speed, CMOS technology
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Dual 4-bit Decade Ripple Counter
• Packaging/Quantity: Tape and Reel, 2500 pieces per reel

Specifications

• Supply Voltage Range: 2V to 6V
• Logic Family: HCT
• Number of Pins: 16
• Operating Temperature Range: -40°C to +85°C
• Maximum Clock Frequency: 25 MHz
• Output Current: ±4 mA
• Propagation Delay: 15 ns

Detailed Pin Configuration

1. CP0: Clock Input for Counter 0
2. CP1: Clock Input for Counter 1
3. MR: Master Reset Input
4. Q0: Output for Counter 0
5. Q1: Output for Counter 1
6. Q2: Output for Counter 2
7. Q3: Output for Counter 3
8. GND: Ground
9. VCC: Power Supply
10. CE: Count Enable Input
11. TC: Terminal Count Output
12. Q4: Output for Counter 4
13. Q5: Output for Counter 5
14. Q6: Output for Counter 6
15. Q7: Output for Counter 7
16. CP2: Clock Input for Counter 2

Functional Features

• Dual 4-bit decade ripple counter with asynchronous reset
• Synchronous counting on positive clock edges
• Asynchronous master reset clears all counters to zero
• Terminal count output indicates when all counters reach maximum value
• Count enable input allows for disabling the counting operation

Advantages and Disadvantages

Advantages: - High-speed operation - Wide supply voltage range - Low power consumption - Compact SOIC package for space-saving designs

Disadvantages: - Limited maximum clock frequency compared to some other counter ICs - Not suitable for applications requiring higher bit count

Working Principles

The CD74HCT390MG4 is a dual 4-bit decade ripple counter that counts up to 99 in binary-coded decimal (BCD) format. It operates on positive clock edges and can be reset asynchronously using the master reset input. The counter outputs are available at Q0-Q7 pins, with terminal count output (TC) indicating when all counters reach their maximum value.

Detailed Application Field Plans

The CD74HCT390MG4 is commonly used in various digital counting applications, such as:

1. Frequency Dividers: It can be used to divide the input clock frequency by a factor of 10, making it useful in frequency synthesis circuits.
2. Timekeeping: The counter can be employed in digital clocks, timers, and other timekeeping devices where precise counting is required.
3. Industrial Control Systems: It finds application in industrial control systems for counting events, monitoring production cycles, or controlling sequential operations.
4. Data Communication: The counter can be utilized in data communication systems for packet counting, error detection, or synchronization purposes.

Detailed and Complete Alternative Models

1. CD4017: Decade counter with 10 outputs, suitable for applications requiring higher bit count.
2. CD4029: Presettable up/down counter with parallel load capability, offering more flexibility in counting modes.
3. CD4518: Dual BCD up-counter with presettable divide-by-N functionality, ideal for frequency division applications.

(Note: These alternative models may have different specifications and pin configurations. Please refer to their respective datasheets for detailed information.)

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