CD74HC221PWT

Product Overview

Category

CD74HC221PWT belongs to the category of integrated circuits (ICs).

Use

This product is commonly used in digital electronics for various applications such as timing, counting, and pulse generation.

Characteristics

• High-speed operation
• Wide operating voltage range
• Low power consumption
• Schmitt-trigger inputs for noise immunity
• Compatible with TTL (Transistor-Transistor Logic) and CMOS (Complementary Metal-Oxide-Semiconductor) logic levels

Package

CD74HC221PWT is available in a TSSOP (Thin Shrink Small Outline Package) package.

Essence

The essence of CD74HC221PWT lies in its ability to provide precise timing and control signals in digital circuits.

Packaging/Quantity

This product is typically packaged in reels or tubes, containing a specific quantity of ICs per package.

Specifications

• Supply Voltage: 2V to 6V
• High-Level Input Voltage: 2V to VCC + 0.5V
• Low-Level Input Voltage: -0.5V to 0.8V
• High-Level Output Voltage: VCC - 0.1V
• Low-Level Output Voltage: 0.1V
• Maximum Operating Frequency: 74 MHz
• Number of Pins: 16

Detailed Pin Configuration

1. CLR (Clear)
2. A (Input A)
3. B (Input B)
4. GND (Ground)
5. CEXT (External Capacitor)
6. RC (Resistor-Capacitor)
7. Q (Output Q)
8. Q̅ (Output Q̅)
9. VCC (Supply Voltage)
10. CLK (Clock)
11. REXT (External Resistor)
12. D (Input D)
13. R (Reset)
14. S (Set)
15. NC (No Connection)
16. GND (Ground)

Functional Features

• Dual monostable multivibrator with reset and set inputs
• Precise control over pulse width and timing intervals
• Can be used for frequency division, time delay generation, and synchronization purposes
• Schmitt-trigger inputs ensure reliable operation in noisy environments

Advantages

• High-speed operation allows for efficient digital signal processing
• Wide operating voltage range provides flexibility in various applications
• Low power consumption contributes to energy efficiency
• Compatibility with TTL and CMOS logic levels enables easy integration into existing circuits

Disadvantages

• Limited maximum operating frequency compared to some other ICs
• Requires external resistors and capacitors for precise timing control
• Not suitable for applications requiring extremely high precision or complex functionality

Working Principles

CD74HC221PWT operates based on the principles of monostable multivibrators. It utilizes external resistors and capacitors to control the timing characteristics of the output pulses. The inputs (A, B, CLR, R, S) determine the behavior of the circuit, allowing for various timing configurations.

Detailed Application Field Plans

CD74HC221PWT finds applications in a wide range of fields, including:

1. Timing circuits in microcontrollers and digital systems
2. Frequency division in communication systems
3. Time delay generation in industrial automation
4. Pulse synchronization in data transmission
5. Control signal generation in robotics and embedded systems

Detailed and Complete Alternative Models

1. CD74HC123E - Dual retriggerable monostable multivibrator
2. CD74HC4040M - 12-stage binary counter
3. CD74HC74M - Dual positive-edge-triggered D flip-flop
4. CD74HC595M - 8-bit shift register with output latches
5. CD74HC86M - Quad 2-input XOR gate

These alternative models offer similar functionality and can be used as substitutes for CD74HC221PWT in various applications.

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