SN74ALS161BDR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Counter
• Characteristics: High-speed, synchronous, 4-bit binary counter
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: The SN74ALS161BDR is a versatile counter IC that can be used in various applications requiring counting functionality.
• Packaging/Quantity: The SN74ALS161BDR is typically sold in reels or tubes containing multiple units.

Specifications

• Supply Voltage: 4.5V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Logic Family: ALS (Advanced Low-Power Schottky)
• Number of Bits: 4
• Clock Frequency: Up to 125 MHz
• Propagation Delay: 8 ns (typical)

Detailed Pin Configuration

The SN74ALS161BDR has a total of 16 pins, each serving a specific purpose. Here is the detailed pin configuration:

1. CLK (Clock Input)
2. MR (Master Reset Input)
3. CPD (Count Enable Parallel Input)
4. P0 (Parallel Data Input Bit 0)
5. P1 (Parallel Data Input Bit 1)
6. P2 (Parallel Data Input Bit 2)
7. P3 (Parallel Data Input Bit 3)
8. Q0 (Serial Output Bit 0)
9. Q1 (Serial Output Bit 1)
10. Q2 (Serial Output Bit 2)
11. Q3 (Serial Output Bit 3)
12. GND (Ground)
13. VCC (Power Supply)
14. CE (Count Enable)
15. CET (Count Enable Trickle)
16. TC (Terminal Count Output)

Functional Features

• Synchronous operation with a common clock input (CLK)
• Reset functionality to clear the counter (MR)
• Parallel load capability for presetting the counter value (CPD)
• Serial output for cascading multiple counters
• Terminal count output (TC) indicating when the counter reaches its maximum value

Advantages and Disadvantages

Advantages: - High-speed operation suitable for demanding applications - Versatile functionality with parallel load and serial cascade options - Wide operating voltage range allows compatibility with various systems - Compact SOIC package for space-constrained designs

Disadvantages: - Limited number of bits (4-bit) may not be sufficient for certain applications requiring larger counters - Propagation delay of 8 ns may introduce timing constraints in high-frequency applications

Working Principles

The SN74ALS161BDR is a synchronous counter that counts up or down based on the clock input. The counter can be reset to its initial state using the master reset input. It also supports parallel loading, allowing the counter to be preset with a specific value. The counter's current value can be accessed through the serial output, enabling cascading of multiple counters.

Detailed Application Field Plans

The SN74ALS161BDR can be used in various applications that require counting functionality, such as:

1. Frequency dividers
2. Event counters
3. Digital clocks
4. Industrial automation systems
5. Communication equipment
6. Test and measurement instruments

Detailed and Complete Alternative Models

1. SN74ALS163BDR: 4-bit synchronous binary counter with parallel load
2. SN74ALS162BDR: 4-bit synchronous binary counter with asynchronous reset
3. SN74ALS164BDR: 8-bit serial-in/parallel-out shift register with synchronous parallel load

These alternative models offer similar functionality to the SN74ALS161BDR but may have additional features or different pin configurations.

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