MC74HC390ADG

Product Overview

• Category: Integrated Circuit (IC)
• Use: Counter/Divider
• Characteristics: High-Speed, CMOS Logic, Dual 4-Bit Decade Counter
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: A versatile counter/divider IC with dual 4-bit decade counters
• Packaging/Quantity: Tape and Reel, 2500 pieces per reel

Specifications

• Supply Voltage Range: 2V to 6V
• Maximum Clock Frequency: 25 MHz
• Number of Counters: 2
• Number of Bits per Counter: 4
• Operating Temperature Range: -40°C to +85°C
• Output Current: ±25mA
• Propagation Delay: 15ns (typical)

Detailed Pin Configuration

The MC74HC390ADG has a total of 16 pins. The pin configuration is as follows:

1. Q0A - Output of Counter A, Bit 0
2. Q1A - Output of Counter A, Bit 1
3. Q2A - Output of Counter A, Bit 2
4. Q3A - Output of Counter A, Bit 3
5. GND - Ground
6. Q3B - Output of Counter B, Bit 3
7. Q2B - Output of Counter B, Bit 2
8. Q1B - Output of Counter B, Bit 1
9. Q0B - Output of Counter B, Bit 0
10. MR - Master Reset
11. CP - Clock Pulse Input
12. CE - Count Enable Input
13. TC - Terminal Count Output
14. VCC - Positive Power Supply
15. Q0B - Output of Counter B, Bit 0
16. Q1B - Output of Counter B, Bit 1

Functional Features

• Dual 4-bit decade counters with separate clock inputs and outputs
• Can be cascaded to create larger counters
• Master reset function for synchronous reset of both counters
• Count enable input for controlling the counting operation
• Terminal count output indicates when the counter reaches its maximum value

Advantages and Disadvantages

Advantages: - High-speed operation allows for efficient counting/dividing tasks - CMOS logic ensures low power consumption - Versatile functionality with dual counters and various control inputs

Disadvantages: - Limited number of bits per counter (4 bits) - Requires external components for proper operation (clock signal, reset control)

Working Principles

The MC74HC390ADG operates based on the principles of digital counting and dividing. The IC consists of two independent 4-bit decade counters, which can count up or down depending on the clock input and control signals. The counters increment or decrement their values based on the clock pulses received, and the terminal count output indicates when the maximum count value is reached. The master reset input allows for synchronous reset of both counters, while the count enable input controls the counting operation.

Detailed Application Field Plans

The MC74HC390ADG finds applications in various fields where counting and dividing operations are required. Some potential application areas include:

1. Frequency Division: The IC can be used to divide an input frequency by a specific factor, enabling frequency scaling in electronic circuits.
2. Digital Counters: It can serve as a building block for designing digital counters in applications such as event counting, timekeeping, or data processing.
3. Sequential Logic: The counters can be utilized in sequential logic circuits for generating specific sequences or patterns based on the clock input and control signals.
4. Industrial Automation: The IC can be employed in industrial automation systems for tasks like position sensing, event monitoring, or production line control.

Detailed and Complete Alternative Models

1. CD4017BE: Decade Counter/Divider IC with 10 outputs, suitable for various counting applications.
2. SN74LS90N: Divide-by-10 Counter IC with separate clock inputs and ripple carry output, commonly used in digital frequency dividers.
3. CD4020B: 14-stage Binary Counter IC with built-in oscillator and reset function, ideal for frequency division tasks.

These alternative models offer similar functionality to the MC74HC390ADG and can be considered based on specific requirements and availability.

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