CD74HCT393M

Product Overview

• Category: Integrated Circuit (IC)
• Use: Digital Logic
• Characteristics: High-Speed CMOS Logic, Dual 4-Bit Binary Ripple Counter
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: The CD74HCT393M is a dual 4-bit binary ripple counter that operates on high-speed CMOS logic. It is commonly used in digital circuits for counting and frequency division applications.
• Packaging/Quantity: Available in reels of 2500 units.

Specifications

• Supply Voltage Range: 2V to 6V
• High-Speed Operation: 74HCT Family
• Maximum Clock Frequency: 25 MHz
• Number of Counting Stages: 2
• Output Current: ±4mA
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The CD74HCT393M has a total of 14 pins, which are assigned as follows:

1. Pin 1: Clock Input A
2. Pin 2: Clock Input B
3. Pin 3: Reset Input
4. Pin 4: Data Input A
5. Pin 5: Data Input B
6. Pin 6: Carry Output A
7. Pin 7: Carry Output B
8. Pin 8: Q0 Output A
9. Pin 9: Q1 Output A
10. Pin 10: Q2 Output A
11. Pin 11: Q3 Output A
12. Pin 12: Q0 Output B
13. Pin 13: Q1 Output B
14. Pin 14: GND (Ground)

Functional Features

• Dual 4-bit binary ripple counter with separate clock inputs (A and B).
• Reset input allows clearing the counter to its initial state.
• Carry outputs (A and B) indicate when the counter reaches its maximum count.
• Q0 to Q3 outputs provide the binary count values.
• High-speed operation allows for efficient counting in digital circuits.

Advantages

• High-speed CMOS logic ensures fast and reliable operation.
• Dual counter design provides flexibility in various applications.
• Compact SOIC package allows for easy integration into circuit boards.
• Wide supply voltage range enables compatibility with different systems.

Disadvantages

• Limited number of counting stages may restrict use in complex applications.
• Requires external clock signals for proper operation.
• Not suitable for applications requiring precise timing or synchronization.

Working Principles

The CD74HCT393M operates based on the principle of binary ripple counting. It counts from 0 to 15 (in binary) and resets back to 0 when the maximum count is reached. The clock inputs (A and B) control the counting process, while the reset input clears the counter to its initial state. The carry outputs (A and B) indicate when the counter reaches its maximum count, allowing for cascading multiple counters if needed.

Detailed Application Field Plans

The CD74HCT393M is widely used in various digital applications, including:

1. Frequency Division: The counter can be used to divide an input frequency by a specific factor, enabling frequency scaling in electronic systems.
2. Event Counting: It can be employed to count events or pulses generated by sensors, switches, or other digital signals.
3. Time Delay Generation: By utilizing the counter's clock input, precise time delays can be achieved in circuits.
4. Address Decoding: The binary count values provided by the Q0 to Q3 outputs can be used for address decoding in memory or peripheral devices.

Detailed and Complete Alternative Models

1. SN74HCT393: Similar dual 4-bit binary ripple counter from Texas Instruments.
2. MC74HCT393: Equivalent dual 4-bit binary ripple counter from ON Semiconductor.
3. CD40193: 4-bit synchronous up/down binary counter with similar functionality.

These alternative models offer similar features and can be used as substitutes for the CD74HCT393M in various applications.

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