MC74AC161M

Product Overview

• Category: Integrated Circuit
• Use: Counter
• Characteristics: High-speed, synchronous, 4-bit binary counter
• Package: 16-pin SOIC (Small Outline Integrated Circuit)
• Essence: The MC74AC161M is a versatile counter that can be used in various applications requiring counting functionality.
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Supply Voltage: 2.0V to 6.0V
• Operating Temperature Range: -40°C to +85°C
• Maximum Clock Frequency: 100MHz
• Number of Counting Stages: 4
• Counting Sequence: Binary
• Reset Function: Asynchronous

Detailed Pin Configuration

The MC74AC161M has 16 pins, each serving a specific purpose:

1. CP (Clock Pulse) - Input pin for clock signal
2. MR (Master Reset) - Asynchronous reset input
3. PE (Parallel Enable) - Enables parallel data inputs
4. P0-P3 (Parallel Data Inputs) - Four parallel data input pins
5. TC (Terminal Count) - Output indicating maximum count reached
6. Q0-Q3 (Outputs) - Four output pins representing the current count value
7. GND (Ground) - Ground reference
8. VCC (Supply Voltage) - Positive supply voltage

Functional Features

• High-speed operation allows for efficient counting in time-critical applications.
• Synchronous design ensures accurate and reliable counting.
• Asynchronous reset function enables quick and easy initialization.
• Parallel enable feature facilitates parallel loading of initial count values.

Advantages and Disadvantages

Advantages

• High-speed operation allows for rapid counting in real-time applications.
• Synchronous design ensures accurate and synchronized counting.
• Asynchronous reset function provides flexibility in resetting the counter.
• Parallel enable feature enables efficient loading of initial count values.

Disadvantages

• Limited to a 4-bit counting sequence, which may not be sufficient for certain applications requiring larger counters.
• Requires an external clock signal for operation, which adds complexity to the circuit design.

Working Principles

The MC74AC161M is a synchronous counter that counts in a binary sequence. It operates based on the clock pulse received at the CP pin. On each rising edge of the clock signal, the counter increments its count value by one. When the maximum count value is reached, the terminal count (TC) output becomes active, indicating the completion of a full counting cycle. The counter can be asynchronously reset using the master reset (MR) input. The parallel enable (PE) input allows for parallel loading of initial count values through the parallel data inputs (P0-P3).

Detailed Application Field Plans

The MC74AC161M can be used in various applications that require counting functionality, such as:

1. Digital frequency dividers
2. Event counters
3. Timer circuits
4. Industrial automation systems
5. Traffic light control systems

Detailed and Complete Alternative Models

1. SN74LS161 - 4-bit synchronous binary counter with asynchronous reset
2. CD40161B - CMOS presettable 4-bit synchronous binary counter
3. 74HC161 - High-speed Si-gate CMOS device with synchronous reset

These alternative models offer similar functionality to the MC74AC161M and can be considered as alternatives depending on specific requirements and availability.

In conclusion, the MC74AC161M is a high-speed, synchronous 4-bit binary counter that finds application in various fields requiring counting functionality. Its versatile features, including synchronous operation, asynchronous reset, and parallel loading capability, make it a reliable choice for numerous digital circuit designs.