SN74AS163NSR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Counter
• Characteristics: High-speed, synchronous, 4-bit binary counter
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: The SN74AS163NSR is a versatile counter IC that can be used in various applications requiring counting functionality.
• Packaging/Quantity: Available in tape and reel packaging, with 2500 units per reel.

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• Operating Temperature Range: -40°C to 85°C
• Maximum Clock Frequency: 125 MHz
• Number of Counting Stages: 4
• Output Type: Synchronous
• Logic Family: AS (Advanced Schottky)

Detailed Pin Configuration

The SN74AS163NSR has a total of 16 pins, which are assigned specific functions as follows:

1. CLK (Pin 1): Clock input for counting operation.
2. MR (Pin 2): Master Reset input, resets the counter to zero when activated.
3. CPD (Pin 3): Clock Enable input, disables clock input when low.
4. PE (Pin 4): Parallel Enable input, enables parallel loading of data when high.
5. D0-D3 (Pins 5-8): Data inputs for parallel loading.
6. Q0-Q3 (Pins 9-12): Outputs representing the current count value.
7. TC (Pin 13): Terminal Count output, goes high when the counter reaches its maximum value.
8. GND (Pins 7, 14): Ground reference.
9. VCC (Pin 16): Positive power supply.

Functional Features

• High-Speed Operation: The SN74AS163NSR operates at a maximum clock frequency of 125 MHz, allowing for rapid counting operations.
• Synchronous Counting: The counter advances its count value synchronously with the clock input, ensuring accurate and reliable counting.
• Parallel Loading: The parallel enable input (PE) allows for loading of data in parallel, providing flexibility in initializing the counter to a specific value.
• Terminal Count Output: The terminal count (TC) output signals when the counter reaches its maximum value, facilitating control in various applications.

Advantages and Disadvantages

Advantages: - High-speed operation enables efficient counting in time-critical applications. - Synchronous counting ensures accurate and synchronized results. - Parallel loading capability allows for easy initialization of the counter. - Versatile usage in various applications requiring counting functionality.

Disadvantages: - Limited number of counting stages (4 bits), may not be suitable for applications requiring larger count ranges. - Requires an external clock source for operation.

Working Principles

The SN74AS163NSR is a synchronous counter that utilizes flip-flops to store and propagate the count value. The counter advances its count value on each rising edge of the clock input. When the master reset (MR) input is activated, the counter is reset to zero. The parallel enable (PE) input allows for parallel loading of data into the counter, overriding the current count value.

Detailed Application Field Plans

The SN74AS163NSR can be used in various applications that require counting functionality, such as:

1. Frequency Dividers: The counter can be used to divide an input frequency by a specific factor, generating lower-frequency outputs.
2. Event Counters: It can be employed to count events or occurrences in systems, such as pulse counting in digital communication systems.
3. Time Delay Generation: By utilizing the terminal count (TC) output, the counter can be used to generate precise time delays in applications like timing circuits.

Detailed and Complete Alternative Models

1. SN74LS163N: Similar 4-bit synchronous counter IC, operating at a lower clock frequency.
2. CD40163BE: 4-bit synchronous binary counter IC with parallel load capability.
3. 74HC163: High-speed CMOS 4-bit synchronous counter IC.

These alternative models offer similar functionality to the SN74AS163NSR and can be considered as replacements based on specific application requirements.

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