MC74HC390ADTR2

Product Overview

• Category: Integrated Circuit (IC)
• Use: Counter/Divider
• Characteristics: High-speed operation, low power consumption
• Package: SOIC-16
• Essence: Dual 4-bit Decade Ripple Counter
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 2V to 6V
• Operating Temperature Range: -55°C to +125°C
• Maximum Clock Frequency: 25 MHz
• Number of Stages: 2
• Output Type: CMOS
• Logic Family: HC

Pin Configuration

The MC74HC390ADTR2 has a total of 16 pins. The pin configuration is as follows:

1. Q0B
2. Q1B
3. Q2B
4. Q3B
5. GND
6. Q3A
7. Q2A
8. Q1A
9. Q0A
10. MR
11. CP1
12. CP0
13. VCC
14. Q0C
15. Q1C
16. Q2C

Functional Features

• Dual 4-bit decade ripple counter with separate clock inputs for each counter
• Asynchronous master reset (MR) input to clear the counter
• Outputs available in three states: high, low, and high impedance
• High-speed operation allows for efficient counting and dividing
• Low power consumption makes it suitable for battery-powered devices

Advantages and Disadvantages

Advantages

• Versatile counter/divider IC suitable for various applications
• High-speed operation enables quick counting and dividing
• Low power consumption extends battery life in portable devices
• Compact SOIC-16 package saves board space

Disadvantages

• Limited number of stages (2) may not be sufficient for complex applications
• CMOS output type may have higher power consumption compared to other logic families
• Requires external clock signals for proper operation

Working Principles

The MC74HC390ADTR2 is a dual 4-bit decade ripple counter that counts up to 99. It operates based on the input clock signals provided to the CP0 and CP1 pins. The counter advances by one on each rising edge of the clock signal.

The asynchronous master reset (MR) input allows the counter to be cleared to zero when activated. The outputs (Q0A, Q1A, Q2A, Q3A, Q0B, Q1B, Q2B, Q3B, Q0C, Q1C, Q2C) represent the current count value in binary format.

Detailed Application Field Plans

The MC74HC390ADTR2 can be used in various applications, including:

1. Frequency division: The counter can divide an input clock frequency by a factor of 10, making it useful in frequency synthesizers and digital frequency meters.
2. Event counting: The counter can keep track of events or pulses, such as in industrial automation systems or electronic test equipment.
3. Timekeeping: By connecting the counter to a clock source, it can be used to measure time intervals or generate precise timing signals.
4. Digital displays: The counter's outputs can be connected to display drivers to create numeric displays for clocks, timers, or counters.

Detailed and Complete Alternative Models

Some alternative models to the MC74HC390ADTR2 include:

1. CD4017BE: Decade counter/divider with 10 decoded outputs, suitable for various applications.
2. SN74LS90N: Decade counter/divider with synchronous reset and outputs available in three states.
3. HEF4022BP: Octal counter/divider with 8 decoded outputs and asynchronous reset.

These alternative models offer similar functionality but may have different specifications, pin configurations, or package options.

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