HEF4521BP,652

Product Overview

• Category: Integrated Circuit (IC)
• Use: Counter/Divider
• Characteristics: High-speed operation, low power consumption
• Package: DIP-16 (Dual In-line Package with 16 pins)
• Essence: Binary counter with a built-in oscillator and reset function
• Packaging/Quantity: Available in reels of 2,500 units

Specifications

• Supply Voltage: 3V to 15V
• Operating Temperature Range: -40°C to +125°C
• Maximum Clock Frequency: 20 MHz
• Number of Stages: 8-bit binary counter
• Reset Function: Active-low asynchronous reset
• Output Type: Buffered outputs

Detailed Pin Configuration

The HEF4521BP,652 IC has 16 pins arranged as follows:

+-----+ Q0 |1 16| VDD Q1 |2 15| MR (Master Reset) Q2 |3 14| CP (Clock Pulse) Q3 |4 13| CE (Count Enable) Q4 |5 12| TC (Terminal Count) Q5 |6 11| GND Q6 |7 10| Q7 Q7 |8 9| Q8 +-----+

Functional Features

• Built-in oscillator for clock generation
• Asynchronous reset allows immediate counter reset
• Count enable input for controlling counting operation
• Terminal count output indicates when the counter reaches its maximum value
• Buffered outputs provide reliable signal transmission

Advantages and Disadvantages

Advantages: - High-speed operation enables efficient counting tasks - Low power consumption for energy-efficient applications - Compact DIP-16 package allows easy integration into various circuits

Disadvantages: - Limited number of stages (8-bit) may not be suitable for complex counting requirements - Lack of additional advanced features compared to more specialized counter ICs

Working Principles

The HEF4521BP,652 is a binary counter that operates based on an internal oscillator. The clock pulse input (CP) triggers the counter to increment its value by one. The count enable input (CE) controls whether the counting operation is enabled or disabled. The master reset input (MR) asynchronously resets the counter to its initial state.

When the counter reaches its maximum value, the terminal count output (TC) becomes active, indicating that the counter has completed a full cycle. The buffered outputs (Q0-Q7) provide the current count value in binary format.

Detailed Application Field Plans

The HEF4521BP,652 IC can be used in various applications, including:

1. Frequency Dividers: The counter can be used to divide an input frequency by a specific factor, allowing for frequency division tasks in communication systems, digital clocks, and signal processing applications.

2. Event Counters: By connecting external events to the clock pulse input, the IC can count occurrences of specific events, such as people passing through a gate, items produced on an assembly line, or vehicles entering a parking lot.

3. Time Delay Generators: Utilizing the oscillator and count enable features, the IC can generate precise time delays for controlling various operations in industrial automation, lighting control systems, and scientific experiments.

4. Digital Displays: The binary outputs of the counter can be used to drive digital displays, showing numerical values or other relevant information in applications like calculators, digital meters, and scoreboards.

Detailed and Complete Alternative Models

Some alternative models to the HEF4521BP,652 IC include:

1. CD4521B: Similar 8-bit binary counter IC with a wider supply voltage range and different package options.
2. MC14521B: Another 8-bit binary counter IC with similar functionality but available in different package types.
3. SN74HC4024: A 7-stage binary ripple counter IC with additional features like synchronous counting and parallel outputs.

These alternative models offer similar functionalities and can be considered based on specific requirements, availability, and compatibility with existing circuit designs.

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