SN74AS161D

Product Overview

• Category: Integrated Circuit (IC)
• Use: Counter
• Characteristics: Synchronous, 4-bit binary counter
• Package: Dual in-line package (DIP)
• Essence: High-speed, low-power consumption counter
• Packaging/Quantity: Available in tubes of 25 units

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Maximum Clock Frequency: 25 MHz
• Number of Counting Stages: 4
• Output Type: Standard
• Logic Family: AS

Detailed Pin Configuration

The SN74AS161D has a total of 16 pins, which are arranged as follows:

1. CLK (Clock Input)
2. MR (Master Reset Input)
3. CPD (Count Enable Parallel Input)
4. A (Binary Input A)
5. B (Binary Input B)
6. C (Binary Input C)
7. D (Binary Input D)
8. QA (Output Q0)
9. QB (Output Q1)
10. QC (Output Q2)
11. QD (Output Q3)
12. GND (Ground)
13. VCC (Positive Power Supply)
14. CE (Count Enable Input)
15. CET (Count Enable Trickle Input)
16. TC (Terminal Count Output)

Functional Features

• Synchronous operation with a common clock input (CLK)
• Master reset (MR) for clearing the counter to zero
• Count enable parallel input (CPD) for loading a specific count value
• Count enable input (CE) for enabling or disabling counting
• Count enable trickle input (CET) for asynchronous counting
• Terminal count output (TC) indicates when the counter reaches its maximum count value

Advantages and Disadvantages

Advantages: - High-speed operation allows for efficient counting in various applications - Low-power consumption makes it suitable for battery-powered devices - Synchronous operation ensures accurate counting results - Compact DIP package allows for easy integration into circuit designs

Disadvantages: - Limited to 4-bit counting, may not be suitable for applications requiring larger count ranges - Requires an external clock source for proper operation

Working Principles

The SN74AS161D is a synchronous 4-bit binary counter. It counts up or down based on the clock input (CLK) and the count enable inputs (CE and CET). The counter can be cleared to zero using the master reset input (MR). The count value can also be loaded through the count enable parallel input (CPD). The terminal count output (TC) indicates when the counter reaches its maximum count value.

Detailed Application Field Plans

The SN74AS161D is commonly used in various applications that require counting functionality. Some of the potential application fields include:

1. Digital frequency counters
2. Industrial automation systems
3. Electronic test equipment
4. Communication systems
5. Automotive electronics

Detailed and Complete Alternative Models

1. SN74LS161A: Similar 4-bit synchronous binary counter with slightly different specifications.
2. CD40161B: 4-bit synchronous binary counter with additional features like asynchronous reset and ripple carry output.
3. MC14516B: 4-bit synchronous binary counter with separate clock and reset inputs.

These alternative models offer similar functionality to the SN74AS161D and can be considered as alternatives based on specific requirements.

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