74HCT390DB,118

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Digital Counter/Divider
• Characteristics: High-speed operation, low power consumption, wide supply voltage range
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Dual Decade Ripple Counter
• Packaging/Quantity: Tape and Reel, 2500 pieces per reel

Specifications

• Supply Voltage Range: 2.0V to 6.0V
• Operating Temperature Range: -40°C to +125°C
• Counting Modes: Asynchronous, Synchronous
• Maximum Clock Frequency: 30 MHz
• Number of Stages: 2
• Output Type: Standard

Detailed Pin Configuration

1. CP1: Clock Input 1
2. CP0: Clock Input 0
3. MR: Master Reset
4. Q0: Output 0
5. Q1: Output 1
6. Q2: Output 2
7. Q3: Output 3
8. Q4: Output 4
9. Q5: Output 5
10. Q6: Output 6
11. Q7: Output 7
12. GND: Ground
13. VCC: Supply Voltage

Functional Features

• Dual decade ripple counter with asynchronous and synchronous counting modes
• Can be used as a divide-by-N counter by connecting the appropriate outputs
• High-speed operation allows for efficient counting in various applications
• Low power consumption makes it suitable for battery-powered devices
• Wide supply voltage range provides flexibility in different electronic systems

Advantages

• Versatile functionality with both asynchronous and synchronous counting modes
• Compact SOIC package enables space-saving integration into circuit boards
• Wide supply voltage range allows compatibility with various power sources
• High-speed operation ensures efficient counting in time-critical applications

Disadvantages

• Limited number of stages (2) may not be sufficient for complex counting requirements
• Lack of built-in error detection or correction mechanisms
• Not suitable for high-frequency applications due to the maximum clock frequency limitation

Working Principles

The 74HCT390DB,118 is a dual decade ripple counter that can count up to 99. It operates based on the input clock signals (CP1 and CP0) and provides outputs (Q0-Q7) representing the current count value. The counter can work in either asynchronous or synchronous mode, depending on the connection of the MR (Master Reset) pin. In asynchronous mode, the counter counts independently of the clock inputs, while in synchronous mode, the counting is synchronized with the clock pulses.

Detailed Application Field Plans

• Frequency division: The 74HCT390DB,118 can be used as a frequency divider to generate lower frequency signals from higher frequency inputs.
• Timekeeping: It can be employed in digital clocks or timers to keep track of time intervals.
• Event counting: The counter can be utilized to count events or occurrences in various applications, such as traffic monitoring systems or industrial automation.

Detailed and Complete Alternative Models

• 74HC390: Similar dual decade ripple counter with slightly different electrical characteristics.
• CD4017: Decade counter/divider with 10 output stages and additional features like decoded outputs and reset functionality.
• SN74LS90: Another dual decade ripple counter with similar functionality but different package options.

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