Encyclopedia Entry: 74VHC161N

Product Overview

Category

The 74VHC161N belongs to the category of integrated circuits (ICs) and specifically falls under the family of digital counters.

Use

This IC is primarily used for counting purposes in various electronic applications. It can be employed in digital systems where sequential counting or frequency division is required.

Characteristics

• The 74VHC161N is a synchronous presettable binary counter.
• It operates on a supply voltage range of 2.0V to 5.5V, making it suitable for both low-power and standard applications.
• This IC offers high-speed operation with a maximum clock frequency of 200 MHz.
• It features asynchronous reset and parallel load capabilities, allowing for flexible control over the counting process.
• The 74VHC161N is designed to have low power consumption and high noise immunity.

Package and Quantity

The 74VHC161N is available in a 16-pin DIP (Dual In-line Package) format. Each package contains one IC.

Specifications

• Supply Voltage Range: 2.0V to 5.5V
• Maximum Clock Frequency: 200 MHz
• Number of Counting Stages: 4
• Input/Output Logic Level: CMOS/TTL compatible
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The detailed pin configuration of the 74VHC161N is as follows:

┌───┬───┐ 1 │CLR│ VCC 2 │CLK│ GND 3 │P0 │ Q0 4 │P1 │ Q1 5 │P2 │ Q2 6 │P3 │ Q3 7 │PL │ QD 8 │ENP│ 9 │ENT│ 10 │D0 │ 11 │D1 │ 12 │D2 │ 13 │D3 │ 14 │LD │ 15 │RC │ 16 │QD │ └───┴───┘

Functional Features

• Synchronous Counting: The 74VHC161N performs counting operations synchronously with the clock signal.
• Presettable Counter: It allows for presetting the initial count value using parallel inputs (P0-P3) and the load (LD) input.
• Asynchronous Reset: The counter can be reset to its initial state asynchronously by applying a low logic level to the clear (CLR) input.
• Carry Output: The carry output (QD) provides a signal indicating when the maximum count value has been reached.

Advantages and Disadvantages

Advantages: - Wide supply voltage range enables compatibility with various systems. - High-speed operation facilitates efficient counting in time-critical applications. - Low power consumption contributes to energy-efficient designs. - Asynchronous reset and parallel load capabilities offer flexibility in controlling the counter.

Disadvantages: - Limited number of counting stages (4) may not be sufficient for certain complex applications. - Lack of built-in error detection or correction mechanisms.

Working Principles

The 74VHC161N operates based on synchronous binary counting principles. It utilizes flip-flops and combinational logic to increment the count value on each rising edge of the clock signal. The preset inputs allow for setting an initial count value, while the asynchronous reset input resets the counter to zero. The carry output indicates when the maximum count value has been reached.

Application Field Plans

The 74VHC161N finds applications in various fields, including: 1. Digital frequency dividers 2. Industrial automation systems 3. Communication equipment 4. Consumer electronics 5. Automotive electronics

Alternative Models

Some alternative models that offer similar functionality to the 74VHC161N include: - CD74HC161E - SN74HC161N - MC74HC161N - 74HCT161N

These alternatives can be considered based on specific requirements and availability.

In conclusion, the 74VHC161N is a versatile synchronous presettable binary counter IC with various applications in digital systems. Its high-speed operation, low power consumption, and flexible control features make it a valuable component in electronic designs.

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