CD74HCT221MT

Overview

• Category: Integrated Circuit
• Use: Digital Logic Gates
• Characteristics: High-Speed, CMOS Technology
• Package: TSSOP-16
• Essence: Dual Monostable Multivibrator
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 2V to 6V
• High-Level Input Voltage: 3.15V (Min), 5.25V (Max)
• Low-Level Input Voltage: 0.35V (Min), 1.5V (Max)
• High-Level Output Voltage: 4.4V (Min), 5.2V (Typ), 5.4V (Max)
• Low-Level Output Voltage: 0.05V (Min), 0.2V (Typ), 0.55V (Max)
• Propagation Delay Time: 20ns (Max)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The CD74HCT221MT has a total of 16 pins arranged as follows:

___________ | | Q1 |1 16| Vcc Q2 |2 15| CLR GND |3 14| A B |4 13| B C |5 12| Q2 D |6 11| Q1 RC |7 10| TR RB |8 9| TA |___________|

Functional Features

• Dual monostable multivibrator with retriggerable and non-retriggerable options.
• Capable of generating accurate time delays or pulses.
• Wide operating voltage range allows for compatibility with various digital systems.
• High-speed operation due to CMOS technology.
• Low power consumption.

Advantages

• Versatile functionality suitable for a wide range of applications.
• Accurate and reliable time delay generation.
• Compatibility with different voltage levels ensures flexibility in system design.
• Low power consumption helps conserve energy.

Disadvantages

• Limited number of output pins may restrict complex circuit designs.
• Propagation delay time may affect timing-sensitive applications.

Working Principles

The CD74HCT221MT is a dual monostable multivibrator integrated circuit. It can be configured as either retriggerable or non-retriggerable, depending on the application requirements. The device generates accurate time delays or pulses based on the external RC network connected to the RC pin. When triggered, the output Q1 goes high for a specific duration determined by the values of the external components. The Q2 output remains low during this time. After the delay period, Q1 returns to a low state, and Q2 goes high. The device can be reset using the CLR pin.

Detailed Application Field Plans

The CD74HCT221MT finds applications in various fields, including:

1. Timing circuits: Used to generate precise time delays in applications such as timers, clocks, and sequential logic circuits.
2. Communication systems: Enables synchronization and timing control in data transmission and reception processes.
3. Industrial automation: Provides accurate timing signals for controlling processes and operations in manufacturing systems.
4. Automotive electronics: Used in vehicle control units for generating precise timing signals in engine management systems, lighting controls, etc.
5. Consumer electronics: Utilized in devices like remote controls, audio/video equipment, and home automation systems for timing-related functions.

Alternative Models

1. SN74HCT221N: DIP-16 package, similar specifications.
2. MC74HCT221ADR2G: SOIC-16 package, similar specifications.
3. CD74HCT221E: PDIP-16 package, similar specifications.

These alternative models offer similar functionality and can be used as replacements for the CD74HCT221MT in various applications.

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