Encyclopedia Entry: 74ACT161SC

Product Information Overview

• Category: Integrated Circuit (IC)
• Use: Counter
• Characteristics: Synchronous, Presettable, Binary
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: High-speed, Low-power, CMOS Logic
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

The 74ACT161SC is a synchronous presettable binary counter IC. It operates on high-speed, low-power CMOS logic, making it suitable for various applications. The IC comes in a Small Outline Integrated Circuit (SOIC) package, which provides ease of use and compatibility with standard PCB designs.

Detailed Pin Configuration

The 74ACT161SC features a 16-pin configuration, with each pin serving a specific function. The detailed pinout is as follows:

1. Clock Enable (CE)
2. Asynchronous Parallel Load (PL)
3. Data Inputs (D0-D3)
4. Carry Output (CO)
5. Count Enable (CEP)
6. Clock Input (CP)
7. Preset Enable (PE)
8. Parallel Enable (PAR)
9. Data Outputs (Q0-Q3)
10. Ripple Clock Output (RCO)
11. GND (Ground)
12. Data Outputs (Q0-Q3)
13. Carry Input (CI)
14. Carry Input (CI)
15. VCC (Power Supply)
16. Clock Enable (CE)

Functional Features

The 74ACT161SC offers the following functional features:

• Synchronous operation: The counter advances on each clock pulse when the count enable (CEP) input is high.
• Presettable: The counter can be loaded with a preset value using the asynchronous parallel load (PL) input.
• Binary counting: The counter counts in binary from 0 to 15 (or any preset value) and wraps around to 0.
• Carry output: The carry output (CO) provides a signal when the counter reaches its maximum count.

Advantages and Disadvantages

Advantages of the 74ACT161SC include:

• High-speed operation: The IC operates at high clock frequencies, making it suitable for time-critical applications.
• Low-power consumption: The CMOS logic used in the IC ensures low power consumption, resulting in energy-efficient designs.
• Presettable functionality: The ability to load a preset value allows for flexible counting sequences.

Disadvantages of the 74ACT161SC include:

• Limited counting range: The counter can only count up to 15 (or any preset value within that range).
• Single package option: The IC is available only in the SOIC package, limiting compatibility with other package types.

Working Principles

The 74ACT161SC operates based on synchronous binary counting principles. When the count enable (CEP) input is high, the counter advances on each rising edge of the clock input (CP). The counter can be loaded with a preset value using the asynchronous parallel load (PL) input. The carry input (CI) allows cascading multiple counters for extended counting ranges.

Detailed Application Field Plans

The 74ACT161SC finds applications in various fields, including:

1. Digital Counters: The IC can be used in digital counters for applications such as frequency division, event counting, and timekeeping.
2. Industrial Control Systems: It can be employed in industrial control systems for monitoring and controlling processes.
3. Communication Systems: The IC can be utilized in communication systems for data packet processing and synchronization.
4. Test and Measurement Equipment: It can be integrated into test and measurement equipment for accurate data acquisition and analysis.

Detailed and Complete Alternative Models

Some alternative models to the 74ACT161SC include:

1. 74HC161: A similar synchronous presettable binary counter IC, but operates on high-speed CMOS (HC) logic.
2. CD40161B: A synchronous presettable binary counter IC with similar functionality, but operates on CMOS logic.

These alternative models provide similar features and can be used as substitutes depending on specific design requirements.

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