CD74HC390MT

Product Overview

• Category: Integrated Circuit
• Use: Digital Counter/Divider
• Characteristics: High-Speed, CMOS Logic, Dual 4-Bit Decade Counter/Divider
• Package: TSSOP (Thin Shrink Small Outline Package)
• Essence: The CD74HC390MT is a dual 4-bit decade counter/divider integrated circuit. It is designed to count up or down from any given number and divide the input clock signal by a factor of 10.
• Packaging/Quantity: The CD74HC390MT is typically sold in reels containing 2500 units.

Specifications

• Supply Voltage: 2V to 6V
• Logic Family: HC
• Number of Pins: 16
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay: 15 ns (typical)
• Maximum Clock Frequency: 50 MHz

Detailed Pin Configuration

The CD74HC390MT has 16 pins, each serving a specific function:

1. Q0: Output of the first 4-bit counter
2. Q1: Output of the second 4-bit counter
3. Q2: Output of the third 4-bit counter
4. Q3: Output of the fourth 4-bit counter
5. MR: Master Reset (active LOW)
6. CP0: Clock Input for the first 4-bit counter
7. CP1: Clock Input for the second 4-bit counter
8. CP2: Clock Input for the third 4-bit counter
9. CP3: Clock Input for the fourth 4-bit counter
10. GND: Ground
11. VCC: Positive Supply Voltage
12. TC: Terminal Count Output
13. Q4: Output of the first 4-bit counter (higher order bit)
14. Q5: Output of the second 4-bit counter (higher order bit)
15. Q6: Output of the third 4-bit counter (higher order bit)
16. Q7: Output of the fourth 4-bit counter (higher order bit)

Functional Features

• Dual 4-bit decade counter/divider
• Can count up or down from any given number
• Divide input clock signal by a factor of 10
• Master Reset function to clear the counters
• Terminal Count output for cascading multiple CD74HC390MT chips

Advantages and Disadvantages

Advantages: - High-speed operation - Low power consumption - Wide operating voltage range - Compact TSSOP package for space-saving designs - Easy integration into digital circuits

Disadvantages: - Limited maximum clock frequency compared to some other counter ICs - Requires careful handling due to sensitivity to electrostatic discharge (ESD)

Working Principles

The CD74HC390MT operates based on the principles of digital counting and dividing. It uses four 4-bit counters to keep track of the current count value. The counters can be configured to count up or down, depending on the input signals applied to the clock inputs. The input clock signal is divided by a factor of 10, allowing for precise frequency division.

Detailed Application Field Plans

The CD74HC390MT finds applications in various fields, including:

1. Frequency Division: Used to divide high-frequency clock signals for synchronization purposes.
2. Digital Counting: Enables accurate counting of events or pulses in digital systems.
3. Timekeeping: Can be used in timekeeping circuits to generate precise time intervals.
4. Industrial Automation: Used in control systems for counting and timing operations.
5. Communication Systems: Employed in data transmission circuits for synchronization and timing purposes.

Detailed and Complete Alternative Models

1. CD74HC393: Dual 4-bit binary counter/divider with separate clock inputs for each counter.
2. CD4017: Decade counter/divider with 10 outputs and a wide operating voltage range.
3. SN74LS90: Decade counter/divider with asynchronous clear and reset functions.

These alternative models offer similar functionality to the CD74HC390MT and can be used as replacements depending on specific requirements.

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