Encyclopedia Entry: 74AC191MTCX

Product Overview

Category

The 74AC191MTCX belongs to the category of integrated circuits (ICs), specifically digital counters.

Use

This IC is commonly used in electronic devices for counting and controlling purposes. It can be employed in various applications that require precise counting and sequencing operations.

Characteristics

• The 74AC191MTCX is a synchronous, presettable, 4-bit binary up/down counter.
• It operates on a wide voltage range, typically between 2V and 6V.
• This IC offers high-speed operation, making it suitable for time-critical applications.
• It has a compact package size, allowing for easy integration into circuit designs.
• The 74AC191MTCX features low power consumption, making it energy-efficient.

Package and Quantity

The 74AC191MTCX is available in a small outline integrated circuit (SOIC) package. It is typically sold in reels or tubes containing multiple units, with quantities varying based on the supplier and customer requirements.

Specifications

• Supply Voltage Range: 2V to 6V
• Maximum Clock Frequency: 100 MHz
• Number of Counting Bits: 4
• Logic Family: Advanced CMOS (AC)
• Operating Temperature Range: -40°C to +85°C
• Package Type: SOIC
• Pin Count: 16

Detailed Pin Configuration

The 74AC191MTCX IC has 16 pins, each serving a specific function. The pin configuration is as follows:

1. MR (Master Reset)
2. CP (Clock Pulse)
3. U/D (Up/Down Control)
4. D0 (Data Input Bit 0)
5. D1 (Data Input Bit 1)
6. D2 (Data Input Bit 2)
7. D3 (Data Input Bit 3)
8. PE (Parallel Enable)
9. TC (Terminal Count)
10. QA (Output Bit A)
11. QB (Output Bit B)
12. QC (Output Bit C)
13. QD (Output Bit D)
14. GND (Ground)
15. VCC (Positive Power Supply)
16. OE (Output Enable)

Functional Features

The 74AC191MTCX offers the following functional features:

• Synchronous counting: The counter advances or decreases its count synchronously with the clock pulse.
• Presettable: The initial count value can be set using the parallel data inputs (D0-D3) and the parallel enable (PE) input.
• Up/Down control: The U/D input determines whether the counter counts up or down.
• Terminal count output: The TC output goes high when the counter reaches its maximum count value, providing a signal for further control operations.
• Output enable: The OE input allows the user to enable or disable the outputs.

Advantages and Disadvantages

Advantages

• High-speed operation enables efficient counting in time-critical applications.
• Wide voltage range compatibility enhances versatility in different electronic systems.
• Compact package size facilitates easy integration into circuit designs.
• Low power consumption contributes to energy efficiency.

Disadvantages

• Limited counting range due to the 4-bit configuration.
• Lack of built-in error detection or correction mechanisms.

Working Principles

The 74AC191MTCX operates based on synchronous counting principles. When a clock pulse is received, the counter increments or decrements its count value based on the up/down control input. The initial count value can be preset using the parallel data inputs and the parallel enable input. The terminal count output provides a signal when the counter reaches its maximum count value, allowing for further control actions.

Detailed Application Field Plans

The 74AC191MTCX finds applications in various fields where precise counting and sequencing operations are required. Some specific application areas include:

1. Digital frequency dividers
2. Industrial automation systems
3. Electronic test equipment
4. Communication devices
5. Automotive electronics
6. Robotics and control systems

Detailed and Complete Alternative Models

There are several alternative models available that offer similar functionality to the 74AC191MTCX. Some notable alternatives include:

1. 74HC191: A high-speed CMOS counter with similar pin configuration and functionality.
2. CD40193: A 4-bit synchronous up/down counter from the CMOS logic family.
3. SN74LS191: A TTL (transistor-transistor logic) counter with parallel load capability.

These alternative models can be considered based on specific project requirements, availability, and compatibility with existing circuit designs.

In conclusion, the 74AC191MTCX is a versatile and efficient 4-bit binary up/down counter IC. Its high-speed operation, wide voltage range compatibility, and compact package make it suitable for various applications in different fields. However,