SN74HC161N

Product Overview

• Category: Integrated Circuit (IC)
• Use: Counter
• Characteristics: High-speed, synchronous, 4-bit binary counter
• Package: DIP (Dual In-line Package)
• Essence: The SN74HC161N is a versatile counter IC that can be used in various applications requiring counting functionality.
• Packaging/Quantity: Available in tubes or reels, with varying quantities depending on the supplier.

Specifications

• Supply Voltage: 2V to 6V
• Operating Temperature Range: -40°C to 85°C
• Logic Family: HC (High-Speed CMOS)
• Number of Bits: 4
• Clock Frequency: Up to 50 MHz
• Output Current: ±6 mA
• Propagation Delay: 13 ns (typical)

Detailed Pin Configuration

The SN74HC161N has a total of 16 pins, each serving a specific function. Here is the detailed pin configuration:

1. Clock Enable (CE)
2. Clock (CP)
3. Parallel Load (PL)
4. Down/Up Count Control (D/U)
5. Carry Out (CO)
6. B0
7. B1
8. B2
9. B3
10. A3
11. A2
12. A1
13. A0
14. Ground (GND)
15. Carry-In (CI)
16. VCC

Functional Features

• Synchronous operation: The counter advances on each clock pulse, ensuring accurate and synchronized counting.
• Binary counting: The SN74HC161N counts in binary, allowing for a wide range of counting possibilities.
• Parallel load capability: The counter can be loaded with a preset value using the parallel load input.
• Up/Down counting: The direction of counting can be controlled using the down/up count control input.
• Carry output: The counter provides a carry output signal that can be used for cascading multiple counters.

Advantages and Disadvantages

Advantages: - High-speed operation allows for efficient counting in time-critical applications. - Versatile functionality makes it suitable for various counting applications. - Synchronous operation ensures accurate and synchronized counting.

Disadvantages: - Limited number of bits (4 bits) may not be sufficient for certain applications requiring larger counting ranges. - Requires external components for more complex applications, such as cascading multiple counters.

Working Principles

The SN74HC161N operates based on the principle of synchronous binary counting. It uses a clock signal to advance its internal counter by one on each clock pulse. The direction of counting (up or down) is determined by the state of the down/up count control input. The counter can also be loaded with a preset value using the parallel load input. The carry output signal indicates when the counter reaches its maximum value and can be used for cascading multiple counters.

Detailed Application Field Plans

The SN74HC161N can be used in various applications that require counting functionality. Some potential application fields include:

1. Digital frequency counters
2. Industrial automation systems
3. Electronic voting machines
4. Traffic light control systems
5. Event timing and sequencing
6. Pulse generation and measurement

Detailed and Complete Alternative Models

• SN74HC163N: 4-bit synchronous binary counter with asynchronous reset
• CD40161BE: CMOS presettable up/down counter
• 74LS161: 4-bit synchronous binary counter with asynchronous reset

These alternative models offer similar functionality to the SN74HC161N and can be considered as alternatives depending on specific requirements and availability.

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