Encyclopedia Entry: 74AC161SCX

Product Overview

Category

The 74AC161SCX belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used in digital electronics for various applications, including counters and registers.

Characteristics

• The 74AC161SCX is a synchronous presettable binary counter.
• It operates on a wide voltage range, typically between 2V and 6V.
• This IC offers high-speed operation and low power consumption.
• It has a compact package size, making it suitable for space-constrained designs.

Package and Quantity

The 74AC161SCX is available in a small outline integrated circuit (SOIC) package. It is typically sold in reels or tubes containing multiple units.

Specifications

• Maximum Clock Frequency: 100 MHz
• Number of Counting Stages: 4
• Supply Voltage Range: 2V - 6V
• Operating Temperature Range: -40°C to +85°C
• Logic Family: AC

Pin Configuration

The detailed pin configuration of the 74AC161SCX is as follows:

1. Clock Enable (CE)
2. Asynchronous Clear (CLR)
3. Parallel Load (PL)
4. Data Inputs (D0-D3)
5. Carry Output (CO)
6. Count Enable (CTEN)
7. Clock (CLK)
8. Outputs (Q0-Q3)

Functional Features

• Synchronous counting: The 74AC161SCX performs counting operations synchronously with the clock signal.
• Presettable: It allows the initial count to be loaded through the parallel load input.
• Asynchronous clear: The asynchronous clear input resets the counter to its initial state.
• Carry output: The carry output provides a signal when the maximum count value is reached.

Advantages

• High-speed operation: The 74AC161SCX offers fast counting capabilities, making it suitable for time-critical applications.
• Low power consumption: It consumes minimal power, contributing to energy-efficient designs.
• Compact package size: The small outline package allows for space-saving integration in electronic circuits.

Disadvantages

• Limited counting stages: With only four counting stages, this IC may not be suitable for applications requiring higher counts.
• Narrow voltage range: The operating voltage range of 2V to 6V may restrict its use in certain systems.

Working Principles

The 74AC161SCX operates based on synchronous binary counting principles. It utilizes flip-flops and logic gates to perform the counting operations. The clock signal controls the timing of each count increment, while the parallel load input allows for presetting the initial count value. The carry output provides a signal when the maximum count is reached.

Application Field Plans

The 74AC161SCX finds applications in various fields, including: 1. Digital frequency dividers 2. Industrial automation 3. Communication systems 4. Consumer electronics 5. Automotive electronics

Alternative Models

For those seeking alternative options, the following models can be considered: 1. 74HC161: A similar synchronous binary counter with a wider supply voltage range. 2. CD40161B: A CMOS-based synchronous presettable counter with additional features. 3. SN74LS161A: A low-power TTL-compatible synchronous counter.

In conclusion, the 74AC161SCX is a versatile integrated circuit used for counting and register applications. Its high-speed operation, low power consumption, and compact package make it suitable for various digital electronics projects.

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