CD74HCT221M96

Product Overview

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

Specifications

• Supply Voltage: 2V to 6V
• Logic Family: HCT
• Number of Pins: 16
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay: 33 ns (typical)
• Output Current: ±4 mA
• Input Capacitance: 3.5 pF (typical)

Pin Configuration

The CD74HCT221M96 has a total of 16 pins arranged as follows:

1. CLR1 - Clear Input for Monostable 1
2. A1 - Trigger Input for Monostable 1
3. B1 - Threshold Input for Monostable 1
4. GND - Ground
5. B2 - Threshold Input for Monostable 2
6. A2 - Trigger Input for Monostable 2
7. CLR2 - Clear Input for Monostable 2
8. VCC - Supply Voltage
9. Q1 - Output of Monostable 1
10. Q2 - Output of Monostable 2
11. Q2 - Complementary Output of Monostable 2
12. Q1 - Complementary Output of Monostable 1
13. NC - No Connection
14. NC - No Connection
15. NC - No Connection
16. NC - No Connection

Functional Features

• Dual monostable multivibrator with independent control inputs
• Each monostable can be triggered and cleared separately
• Monostables operate in non-retriggerable mode
• Output pulse width determined by external timing components
• High-speed operation suitable for digital applications
• CMOS technology provides low power consumption

Advantages and Disadvantages

Advantages

• Independent control of each monostable allows flexible timing configurations
• Non-retriggerable mode ensures precise pulse generation
• High-speed operation enables efficient digital signal processing
• Low power consumption due to CMOS technology

Disadvantages

• Limited number of pins restricts the complexity of circuits that can be built using this IC
• External timing components required for accurate pulse width control

Working Principles

The CD74HCT221M96 is a dual monostable multivibrator integrated circuit. It consists of two independent monostables, each capable of generating a single output pulse when triggered. The triggering and clearing of each monostable can be controlled independently.

When a trigger input signal is applied to the A1 or A2 pin, the corresponding monostable is triggered, and its Q output goes high for a duration determined by the external timing components connected to the B1 or B2 pin. The Q output remains high until the pulse width expires or a clear input signal is applied to the CLR1 or CLR2 pin.

The CD74HCT221M96 operates in a non-retriggerable mode, meaning that additional trigger signals during the pulse width period do not affect the output. This ensures precise pulse generation without interference.

Detailed Application Field Plans

The CD74HCT221M96 is commonly used in various digital applications that require precise timing control. Some potential application fields include:

1. Pulse Width Modulation (PWM) Generation: The independent control of each monostable allows the generation of PWM signals with different duty cycles. This is useful in applications such as motor speed control, LED dimming, and audio signal processing.

2. Timing and Delay Circuits: The CD74HCT221M96 can be used to create accurate timing and delay circuits in applications like clock synchronization, data sampling, and signal conditioning.

3. Sequential Logic Circuits: By utilizing the monostables as pulse generators, the IC can be employed in sequential logic circuits such as counters, shift registers, and frequency dividers.

4. Communication Systems: The precise pulse generation capability of the CD74HCT221M96 makes it suitable for use in communication systems that require accurate timing, such as UART (Universal Asynchronous Receiver-Transmitter) interfaces and data transmission protocols.

Detailed and Complete Alternative Models

1. SN74HCT221N: Similar to CD74HCT221M96, but in DIP-16 package.
2. MC74HCT221A: Dual monostable multivibrator with slightly different specifications.
3. 74HC221: Monostable multivibrator with similar functionality but operates at a higher voltage range.

These alternative models provide similar