Encyclopedia Entry: 74F161APC

Product Information Overview

Category: Integrated Circuit (IC)

Use: The 74F161APC is a synchronous presettable binary counter that belongs to the family of 74F series integrated circuits. It is commonly used in digital electronics and computer systems for counting and timing applications.

Characteristics: - Synchronous operation - Presettable counter - High-speed performance - Low power consumption - Wide operating voltage range

Package: The 74F161APC is available in a 16-pin dual in-line package (DIP), which provides easy integration into electronic circuit boards.

Essence: This IC serves as a versatile and reliable component for various counting and timing tasks in digital systems.

Packaging/Quantity: The 74F161APC is typically sold in reels or tubes, containing multiple units per package. The exact quantity may vary depending on the supplier.

Specifications

The key specifications of the 74F161APC are as follows:

• Supply Voltage Range: 4.5V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Maximum Clock Frequency: 100 MHz
• Number of Counting Stages: 4
• Maximum Count Value: 15 (binary)
• Input/Output Compatibility: TTL (Transistor-Transistor Logic) compatible

Detailed Pin Configuration

The pin configuration of the 74F161APC is as follows:

+---+--+---+ CLR |1 +--+ 16| Vcc CLK |2 15| Q0 P0 |3 14| Q1 P1 |4 13| Q2 P2 |5 74F161APC 12| Q3 P3 |6 11| PE GND |7 10| CET PR |8 9| TC +----------+

Functional Features

• Synchronous Operation: The 74F161APC performs counting operations synchronously with the clock signal, ensuring accurate and reliable counting.

• Presettable Counter: This IC allows presetting the initial count value using the parallel input pins (P0-P3), providing flexibility in counting applications.

• Ripple Carry Output (TC): The TC pin generates a carry output signal when the counter reaches its maximum count value, enabling cascading multiple counters for extended counting ranges.

• Clear Input (CLR): The CLR pin resets the counter to zero when activated, allowing easy initialization of the counting process.

• Parallel Enable (PE) and Count Enable (CET): These pins control the enable/disable functionality of the counter, providing additional control over the counting operation.

Advantages and Disadvantages

Advantages: - High-speed performance enables efficient counting in time-critical applications. - Low power consumption contributes to energy-efficient designs. - Wide operating voltage range ensures compatibility with various digital systems. - Presettable feature enhances flexibility in counting applications.

Disadvantages: - Limited number of counting stages restricts the maximum count value to 15 (binary). - Requires external components for more complex counting tasks.

Working Principles

The 74F161APC operates based on synchronous binary counting principles. It utilizes flip-flops and combinational logic to perform counting operations. The counter advances by one count on each rising edge of the clock signal, unless disabled by the count enable (CET) pin. The parallel inputs (P0-P3) allow presetting the initial count value, while the clear input (CLR) resets the counter to zero. The ripple carry output (TC) generates a carry signal when the maximum count value is reached, enabling cascading of multiple counters.

Detailed Application Field Plans

The 74F161APC finds applications in various digital systems and electronic devices, including but not limited to:

1. Digital frequency dividers
2. Timer circuits
3. Event counters
4. Industrial automation systems
5. Communication equipment
6. Microcontrollers and microprocessors
7. Automotive electronics
8. Robotics and control systems

Detailed and Complete Alternative Models

Some alternative models that can be considered as replacements or alternatives to the 74F161APC include:

1. 74LS161
2. 74HC161
3. CD40161
4. SN54/74LS161A
5. CD74HC161

These alternative models offer similar functionality and can be used interchangeably in many applications.

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