CD74HCT221E

Product Overview

• Category: Integrated Circuit
• Use: Digital Logic Gate
• Characteristics: High-Speed, CMOS Technology
• Package: DIP (Dual In-line Package)
• Essence: Monostable Multivibrator
• Packaging/Quantity: Tube, 25 pieces per tube

Specifications

• Supply Voltage: 2V to 6V
• Input Voltage: 0V to VCC
• Output Voltage: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 33 ns (typical)
• Trigger Pulse Width: 20 ns (minimum)

Detailed Pin Configuration

The CD74HCT221E has a total of 16 pins. The pin configuration is as follows:

1. CLR (Clear) - Clear input
2. A - Input A
3. B - Input B
4. GND (Ground) - Ground reference
5. Q - Output Q
6. Q̅ - Complementary output Q̅
7. RCext (External Resistor-Capacitor) - External resistor-capacitor timing components
8. VCC (Positive Power Supply) - Positive power supply voltage
9. NC (No Connection) - No connection
10. NC (No Connection) - No connection
11. NC (No Connection) - No connection
12. NC (No Connection) - No connection
13. NC (No Connection) - No connection
14. NC (No Connection) - No connection
15. NC (No Connection) - No connection
16. NC (No Connection) - No connection

Functional Features

The CD74HCT221E is a monostable multivibrator integrated circuit. It is designed to generate a single pulse of a fixed duration in response to a trigger input. The pulse width is determined by the external resistor-capacitor timing components connected to the RCext pin. The device operates on CMOS technology, providing high-speed performance and low power consumption.

Advantages and Disadvantages

Advantages: - High-speed operation - Low power consumption - Wide operating voltage range - Compact DIP package for easy integration

Disadvantages: - Limited functionality compared to more complex logic gates - Requires external timing components for pulse width control

Working Principles

The CD74HCT221E works as a monostable multivibrator by utilizing the internal circuitry to generate a single pulse of fixed duration. When a trigger pulse is applied to the CLR (Clear) input, the output Q goes high for a specific time period determined by the external resistor-capacitor timing components connected to the RCext pin. After this duration, the output returns to its original state.

Detailed Application Field Plans

The CD74HCT221E can be used in various applications that require the generation of a single pulse with a specific duration. Some potential application fields include:

1. Timing circuits: Used to control precise timing intervals in electronic systems.
2. Pulse generators: Generates pulses for triggering other devices or circuits.
3. Communication systems: Used in synchronization circuits for data transmission.
4. Industrial automation: Controls timing sequences in automated processes.
5. Robotics: Provides precise timing signals for robotic movements.

Detailed and Complete Alternative Models

1. CD74HC123E: Dual Retriggerable Monostable Multivibrator
2. CD74HCT123E: Dual Retriggerable Monostable Multivibrator with Schmitt Trigger Inputs
3. CD74HC221E: Dual Non-Retriggerable Monostable Multivibrator

These alternative models offer similar functionality to the CD74HCT221E but may have different features or specifications that suit specific application requirements.

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