M74HC221B1R

Product Overview

Category

M74HC221B1R belongs to the category of integrated circuits (ICs).

Use

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

Characteristics

• High-speed operation
• Wide operating voltage range
• Low power consumption
• Compatibility with TTL logic levels
• Schmitt trigger inputs for noise immunity

Package

The M74HC221B1R is available in a standard 16-pin dual in-line package (DIP).

Essence

The essence of M74HC221B1R lies in its ability to provide precise timing and control signals in digital circuits.

Packaging/Quantity

The M74HC221B1R is typically packaged in reels or tubes, containing a specific quantity of ICs per package. The exact packaging and quantity may vary depending on the manufacturer.

Specifications

• Supply Voltage: 2V to 6V
• Operating Temperature Range: -40°C to +125°C
• Maximum Clock Frequency: 25 MHz
• Output Current: ±25 mA
• Propagation Delay: 9 ns (typical)

Detailed Pin Configuration

The M74HC221B1R has a total of 16 pins, each serving a specific purpose. The pin configuration is as follows:

1. CLR (Clear)
2. A (Input A)
3. B (Input B)
4. GND (Ground)
5. RC (Reset Control)
6. Q (Output Q)
7. Q̅ (Complementary Output Q)
8. VCC (Positive Power Supply)
9. CLK (Clock Input)
10. R (Reset Input)
11. D (Data Input)
12. NC (No Connection)
13. NC (No Connection)
14. NC (No Connection)
15. NC (No Connection)
16. NC (No Connection)

Functional Features

• Dual monostable multivibrator with reset
• Positive-edge triggered clock input
• Clear and reset inputs for control
• Output Q provides a pulse of programmable width upon receiving a clock signal

Advantages and Disadvantages

Advantages

• High-speed operation allows for efficient digital circuit design.
• Wide operating voltage range enables compatibility with various power supply systems.
• Low power consumption reduces energy requirements.
• Schmitt trigger inputs provide noise immunity, ensuring reliable operation in noisy environments.

Disadvantages

• Limited maximum clock frequency may restrict its use in high-frequency applications.
• Propagation delay of 9 ns may introduce timing issues in certain circuits.

Working Principles

The M74HC221B1R operates based on the principles of monostable multivibrators. It utilizes a clock input to trigger the generation of a pulse with a programmable width. The clear and reset inputs allow for control over the output pulse generation.

Detailed Application Field Plans

The M74HC221B1R finds application in various fields, including: 1. Timing circuits 2. Counters and dividers 3. Pulse generators 4. Digital communication systems 5. Industrial automation

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the M74HC221B1R include: 1. CD74HC221E by Texas Instruments 2. MC74HC221N by ON Semiconductor 3. SN74HC221N by Texas Instruments 4. HEF4521BP by NXP Semiconductors

These alternative models can be considered based on specific requirements and availability.

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