CD74HCT390E

Product Overview

• Category: Integrated Circuit
• Use: Digital Counter
• Characteristics: High-speed, CMOS technology
• Package: DIP (Dual In-line Package)
• Essence: Dual 4-bit Decade Counter
• Packaging/Quantity: Tube, 25 pieces per tube

Specifications

• Supply Voltage: 2V to 6V
• Operating Temperature Range: -40°C to +85°C
• Maximum Clock Frequency: 25 MHz
• Number of Pins: 16
• Logic Family: HCT (High-Speed CMOS)

Detailed Pin Configuration

1. Clock Input A (Pin 14)
2. Clock Input B (Pin 13)
3. Reset Input (Pin 15)
4. Enable Input (Pin 1)
5. Carry Output (Pin 11)
6. Ripple Clock Output (Pin 10)
7. Q0 Output (Pin 2)
8. Q1 Output (Pin 3)
9. Q2 Output (Pin 4)
10. Q3 Output (Pin 5)
11. Q4 Output (Pin 6)
12. Q5 Output (Pin 7)
13. Q6 Output (Pin 9)
14. Q7 Output (Pin 8)
15. GND (Ground) (Pin 16)
16. VCC (Supply Voltage) (Pin 15)

Functional Features

• Dual 4-bit decade counter with asynchronous reset
• High-speed operation due to CMOS technology
• Can be cascaded for larger counting applications
• Carry output for cascading multiple counters
• Ripple clock output for synchronization purposes
• Enable input for controlling the counter operation

Advantages and Disadvantages

Advantages: - High-speed operation allows for quick counting applications - CMOS technology provides low power consumption - Cascading capability enables larger counting ranges

Disadvantages: - Limited to 4-bit counting, may not be suitable for applications requiring higher bit counts - DIP package may not be suitable for space-constrained designs

Working Principles

The CD74HCT390E is a dual 4-bit decade counter that counts from 0 to 9 in binary. It operates using CMOS technology, which allows for high-speed operation and low power consumption. The counter can be reset asynchronously using the reset input, and its operation can be enabled or disabled using the enable input.

The counter increments on each rising edge of the clock signal applied to either Clock Input A or Clock Input B. The outputs represent the binary count from 0 to 9, with Q0 being the least significant bit (LSB) and Q3 being the most significant bit (MSB). The carry output provides a signal when the count reaches 10, allowing for cascading multiple counters to achieve larger counting ranges.

Detailed Application Field Plans

The CD74HCT390E can be used in various applications that require counting functionality, such as:

1. Digital frequency dividers
2. Event counters
3. Timekeeping circuits
4. Industrial automation systems
5. Traffic light control systems
6. Electronic games
7. Frequency synthesizers

Detailed and Complete Alternative Models

1. CD40192BE: 4-bit synchronous up/down decade counter
2. CD4029BE: 4-bit presettable up/down counter
3. CD4518BE: Dual 4-bit decade counter with presettable divide-by-N function
4. CD4026BE: Decade counter/divider with decoded 7-segment display outputs
5. CD4040BE: 12-stage binary ripple counter

These alternative models offer similar counting capabilities but may have different features or specifications that suit specific application requirements.

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