SN74HC161PWG4

Product Overview

• Category: Integrated Circuit
• Use: Counter
• Characteristics: High-speed, synchronous, 4-bit binary counter
• Package: TSSOP-16
• Essence: Reliable and efficient digital counter
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 2V to 6V
• Operating Temperature Range: -40°C to +85°C
• Maximum Clock Frequency: 50 MHz
• Number of Counting Stages: 4
• Output Current: ±6 mA
• Propagation Delay: 13 ns (typical)
• Power Dissipation: 500 mW (max)

Pin Configuration

The SN74HC161PWG4 has a total of 16 pins. The pin configuration is as follows:

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

Functional Features

• Synchronous operation with a common clock input
• Parallel load capability for presetting the counter
• Up/down counting mode controlled by the D/U input
• Carry input and carry output for cascading multiple counters
• High-speed operation with minimal propagation delay

Advantages and Disadvantages

Advantages: - High-speed operation allows for efficient counting in various applications - Synchronous operation ensures accurate and reliable counting - Parallel load capability enables easy presetting of the counter - Up/down counting mode provides flexibility in counting direction - Compact TSSOP-16 package allows for space-saving integration

Disadvantages: - Limited number of counting stages (4 in this case) - Requires an external clock signal for operation

Working Principles

The SN74HC161PWG4 is a synchronous 4-bit binary counter. It operates based on the input clock signal and counts up or down depending on the state of the D/U input. The counter can be preset to a specific value using the parallel load input. The carry input and carry output pins allow for cascading multiple counters to achieve higher counting ranges.

Detailed Application Field Plans

The SN74HC161PWG4 finds applications in various fields, including:

1. Digital frequency division: The counter can be used to divide an input clock frequency by a specific factor, enabling frequency scaling in digital systems.
2. Event counting: It can be employed to count events or pulses in applications such as industrial automation, robotics, and electronic instrumentation.
3. Timekeeping: The counter can be utilized in timekeeping circuits to track elapsed time or generate precise timing signals.
4. Sequence generation: It can be used to generate specific sequences of binary numbers for control purposes in digital systems.

Detailed and Complete Alternative Models

1. SN74HC163PWG4: Similar to SN74HC161PWG4 but with additional asynchronous reset functionality.
2. CD40161BE: A CMOS version of the 4-bit synchronous binary counter with similar features.
3. 74LS161: A TTL version of the 4-bit synchronous binary counter with comparable characteristics.

These alternative models provide similar functionality and can be considered as substitutes for the SN74HC161PWG4 in different applications.

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