Encyclopedia Entry: 74ACT161MTR

Product Overview

Category

The 74ACT161MTR belongs to the category of integrated circuits (ICs) and specifically falls under the family of counter ICs.

Use

This IC is primarily used for counting applications in digital electronic systems. It can be employed in various devices such as calculators, digital clocks, frequency dividers, and other similar electronic equipment.

Characteristics

• The 74ACT161MTR is a synchronous, presettable, 4-bit binary counter.
• It operates on a wide voltage range, typically between 2V and 6V.
• This IC offers high-speed operation with low power consumption.
• It has a compact package size, making it suitable for space-constrained designs.

Package and Quantity

The 74ACT161MTR is available in a small outline integrated circuit (SOIC) package. It consists of 16 pins arranged in a compact form factor. The IC is commonly sold in reels or tubes containing multiple units, with quantities varying based on the supplier.

Specifications

• Supply Voltage Range: 2V to 6V
• Maximum Clock Frequency: 125 MHz
• Number of Counting Bits: 4
• Input/Output Logic Level: TTL compatible
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The pin configuration of the 74ACT161MTR is as follows:

+---+--+---+ Q0 |1 16| Vcc Q1 |2 15| MR Q2 |3 14| CP Q3 |4 13| CE GND |5 12| PE D0 |6 11| T0 D1 |7 10| T1 D2 |8 9| T2 +--------+

Functional Features

• Synchronous Operation: The counter advances its state on each clock pulse, ensuring accurate counting.
• Presettable Functionality: The IC allows the user to set an initial value for the counter using the preset inputs (P0, P1, P2, and P3).
• Asynchronous Master Reset: The MR input resets the counter to its initial state when activated, regardless of the clock signal.
• Carry Enable and Parallel Enable Inputs: These inputs control the counting and loading operations, providing flexibility in various applications.

Advantages and Disadvantages

Advantages

• High-speed operation enables efficient counting in time-critical applications.
• Low power consumption makes it suitable for battery-powered devices.
• Compact package size allows for space-efficient designs.
• Wide voltage range compatibility enhances versatility.

Disadvantages

• Limited counting range due to the 4-bit configuration.
• Lack of built-in error detection or correction mechanisms.

Working Principles

The 74ACT161MTR operates based on synchronous binary counting principles. On each rising edge of the clock signal, the counter advances by one count. The preset inputs allow the user to initialize the counter to a specific value. The asynchronous master reset input resets the counter to its initial state, overriding the clock signal. The carry enable and parallel enable inputs control the counting and loading operations, respectively.

Application Field Plans

The 74ACT161MTR finds application in various digital electronic systems that require counting functionality. Some potential application fields include: - Digital clocks and timers - Frequency dividers and generators - Industrial automation systems - Data communication equipment - Consumer electronics devices such as calculators and gaming consoles

Alternative Models

Several alternative models with similar functionalities are available in the market. Some notable alternatives to the 74ACT161MTR include: - 74HC161: A CMOS version of the counter IC with similar characteristics. - CD40161B: A 4-bit synchronous binary counter with preset and asynchronous reset features. - SN74LS161A: A TTL-compatible, synchronous 4-bit counter with parallel load capability.

These alternative models offer comparable functionalities and can be considered based on specific design requirements.

In conclusion, the 74ACT161MTR is a versatile 4-bit binary counter IC that finds application in various digital electronic systems. Its high-speed operation, low power consumption, and compact package make it suitable for diverse counting applications. However, designers should consider its limited counting range and absence of error detection mechanisms when selecting this IC for their projects.