CD74HC93E

Product Overview

• Category: Integrated Circuit
• Use: Counter
• Characteristics: High-speed, CMOS logic, 4-bit binary ripple counter
• Package: DIP (Dual In-line Package)
• Essence: A versatile counter IC used in various digital applications
• Packaging/Quantity: Available in tubes of 25 pieces or reels of 2,000 pieces

Specifications

• Supply Voltage Range: 2V to 6V
• Maximum Clock Frequency: 25 MHz
• Number of Counting Stages: 4
• Output Drive Capability: 10 LSTTL Loads
• Operating Temperature Range: -55°C to +125°C

Detailed Pin Configuration

The CD74HC93E has a total of 14 pins. The pin configuration is as follows:

1. Clock Input (CP)
2. Reset Input (MR)
3. Data Input (D0)
4. Data Input (D1)
5. Data Input (D2)
6. Data Input (D3)
7. Carry Output (CO)
8. Enable Input (ENP)
9. Enable Input (ENT)
10. Output (Q0)
11. Output (Q1)
12. Output (Q2)
13. Output (Q3)
14. Ground (GND)

Functional Features

• High-Speed Operation: The CD74HC93E can count at a maximum clock frequency of 25 MHz, making it suitable for high-speed applications.
• Ripple Counter: It is a 4-bit binary ripple counter, which means that each stage of the counter is triggered by the output of the previous stage.
• CMOS Logic: The IC uses CMOS technology, providing low power consumption and high noise immunity.
• Asynchronous Reset: The counter can be reset to its initial state by applying a low signal to the Reset Input (MR).
• Enable Inputs: The counter can be enabled or disabled using the Enable Inputs (ENP and ENT).

Advantages and Disadvantages

Advantages: - High-speed operation allows for efficient counting in time-critical applications. - CMOS technology ensures low power consumption and high noise immunity. - Asynchronous reset feature provides flexibility in controlling the counter's state.

Disadvantages: - Limited number of counting stages (4) may not be sufficient for certain complex applications. - Requires careful handling due to its small size and delicate pins.

Working Principles

The CD74HC93E is a ripple counter that counts binary numbers. It operates by sequentially changing the states of its four counting stages based on the clock input signal. Each stage represents a bit of the binary number, and the output of each stage is connected to the clock input of the next stage. When the counter reaches its maximum count (15 in this case), it resets back to zero.

Detailed Application Field Plans

The CD74HC93E can be used in various digital applications, including:

1. Frequency Division: The counter can be used to divide the frequency of an input signal by powers of 2, allowing for frequency scaling.
2. Time Delay Generation: By connecting the counter's outputs to appropriate logic gates, precise time delays can be generated.
3. Event Counting: The counter can be used to count events or pulses occurring within a specific time period.
4. Address Generation: In microprocessor systems, the counter can be used to generate memory addresses or control signals.

Detailed and Complete Alternative Models

1. CD4017: A decade counter with 10 counting stages, suitable for applications requiring higher counting range.
2. CD4020: A 14-stage binary counter with a built-in oscillator, ideal for frequency division applications.
3. CD4510: A synchronous 4-bit binary counter with a presettable count, providing more control over the counting sequence.

These alternative models offer different features and capabilities, allowing users to choose the most suitable counter for their specific requirements.

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