SN74221NG4

Product Overview

• Category: Integrated Circuit (IC)
• Use: Digital Logic
• Characteristics: Dual Monostable Multivibrator
• Package: DIP-16 (Dual In-line Package with 16 pins)
• Essence: Timing Control Device
• Packaging/Quantity: Tube, 25 pieces per tube

Specifications

• Supply Voltage Range: 4.75V to 5.25V
• High-Level Input Voltage: 2V to VCC
• Low-Level Input Voltage: GND to 0.8V
• High-Level Output Voltage: 2.4V (min)
• Low-Level Output Voltage: 0.4V (max)
• Maximum Operating Frequency: 33MHz
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

1. CLR (Clear) - Active LOW input for resetting the circuit.
2. A (Trigger) - Active LOW input for triggering the monostable multivibrator.
3. B (Threshold) - Active HIGH input for setting the time duration of the output pulse.
4. Rext (External Resistor) - Connected to an external resistor to control the timing.
5. Cext (External Capacitor) - Connected to an external capacitor to control the timing.
6. Q (Output) - Output pin that provides the delayed pulse.
7. GND (Ground) - Ground reference for the IC.
8. VCC (Supply Voltage) - Positive supply voltage for the IC.
9. NC (No Connection) - Not connected pin.
10. NC (No Connection) - Not connected pin.
11. NC (No Connection) - Not connected pin.
12. NC (No Connection) - Not connected pin.
13. NC (No Connection) - Not connected pin.
14. NC (No Connection) - Not connected pin.
15. NC (No Connection) - Not connected pin.
16. VCC (Supply Voltage) - Positive supply voltage for the IC.

Functional Features

• Dual monostable multivibrator with independent triggering and timing control.
• Provides precise timing control for various applications.
• Can generate accurate time delays and pulses.
• Wide operating frequency range allows for versatile use.
• Easy to integrate into digital logic circuits.
• Reliable performance in a wide temperature range.

Advantages

• Independent triggering and timing control for each monostable multivibrator.
• Accurate and stable timing control.
• Versatile use in various digital logic applications.
• Easy integration into existing circuit designs.
• Reliable performance in harsh environments.

Disadvantages

• Limited maximum operating frequency compared to some other ICs.
• Requires external resistors and capacitors for timing control.
• Not suitable for high-speed applications.

Working Principles

The SN74221NG4 is a dual monostable multivibrator IC that generates a pulse of a specific duration when triggered. It consists of two independent monostable multivibrators, each controlled by its own trigger and timing components. When triggered, the output Q goes HIGH for a specific time determined by the external resistor and capacitor connected to the respective timing pins. The CLR input can be used to reset the circuit and abort the output pulse.

Detailed Application Field Plans

• Timing control in digital systems.
• Pulse generation for sequential logic circuits.
• Delayed triggering in communication systems.
• Time measurement in instrumentation applications.
• Control signal generation in industrial automation.

Detailed and Complete Alternative Models

1. CD74HC123E - Dual Retriggerable Monostable Multivibrator
2. MC14538B - Dual Precision Monostable Multivibrator
3. 74HC221D - Dual Non-Retriggerable Monostable Multivibrator
4. CD4047BE - Monostable/Astable Multivibrator

These alternative models offer similar functionality and can be used as substitutes for the SN74221NG4 in various applications.

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