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MM74HC161M
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MM74HC161M

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Counter
  • Characteristics: High-Speed, Synchronous, 4-Bit Binary Counter
  • Package: 16-Pin SOIC (Small Outline Integrated Circuit)
  • Essence: The MM74HC161M is a versatile counter IC that can be used in various applications requiring counting functionality.
  • Packaging/Quantity: Available in reels of 2500 units or tubes of 50 units.

Specifications

  • Supply Voltage: 2V to 6V
  • Operating Temperature Range: -40°C to +85°C
  • Maximum Clock Frequency: 25 MHz
  • Number of Counting Stages: 4
  • Counting Modes: Synchronous, Asynchronous
  • Reset Function: Available
  • Output Type: TTL (Transistor-Transistor Logic) compatible

Pin Configuration

The MM74HC161M has a total of 16 pins. Here is the detailed pin configuration:

  1. Clock Enable (CE)
  2. Clock Input (CP)
  3. Parallel Load (PL)
  4. Asynchronous Reset (MR)
  5. Carry Output (CO)
  6. Data Inputs (D0-D3)
  7. Ripple Clock Output (RCO)
  8. Carry Input (CI)
  9. Ground (GND)
  10. Data Outputs (Q0-Q3)
  11. VCC (Positive Power Supply)

Functional Features

  • Synchronous Counting: The MM74HC161M performs synchronous counting, where all stages change simultaneously on each clock pulse.
  • Asynchronous Counting: It also supports asynchronous counting, allowing individual stages to be preset independently.
  • Parallel Loading: The parallel load feature enables the user to load a desired count into the counter by applying the data to the inputs and activating the parallel load input.
  • Carry Input/Output: The carry input allows cascading multiple counters, while the carry output provides a signal indicating an overflow condition.
  • Reset Function: The asynchronous reset input resets the counter to its initial state.

Advantages and Disadvantages

Advantages: - High-speed operation - Versatile counting modes - Easy integration into digital circuits - Compact package size

Disadvantages: - Limited number of counting stages (4 in this case) - Requires external clock source

Working Principles

The MM74HC161M operates based on the principle of synchronous sequential logic. It utilizes flip-flops to store and propagate binary information. On each clock pulse, the counter increments or decrements based on the selected counting mode. The parallel load feature allows presetting the desired count by loading data into the counter's inputs.

Detailed Application Field Plans

The MM74HC161M can be used in various applications that require counting functionality, such as:

  1. Digital frequency dividers
  2. Event counters
  3. Timers and clocks
  4. Industrial automation systems
  5. Communication equipment

Detailed and Complete Alternative Models

Here are some alternative models that offer similar functionality:

  1. CD74HC161E: 16-Pin DIP (Dual In-Line Package) version of the MM74HC161M.
  2. SN74HC161N: 16-Pin PDIP (Plastic Dual In-Line Package) version with wider temperature range.
  3. MC74HC161AN: 16-Pin PDIP version with extended supply voltage range.

These alternatives provide flexibility in terms of package type, temperature range, and supply voltage requirements.

In conclusion, the MM74HC161M is a high-speed, synchronous 4-bit binary counter IC. Its versatile features, compact package, and ease of integration make it suitable for various applications. However, its limited number of counting stages and reliance on an external clock source should be considered when selecting the appropriate counter for a specific application.

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技術ソリューションにおける MM74HC161M の適用に関連する 10 件の一般的な質問と回答をリストします。

Sure! Here are 10 common questions and answers related to the application of MM74HC161M in technical solutions:

  1. Q: What is MM74HC161M? A: MM74HC161M is a 4-bit synchronous binary counter with asynchronous reset, commonly used in digital circuits.

  2. Q: What is the operating voltage range for MM74HC161M? A: The operating voltage range for MM74HC161M is typically between 2V and 6V.

  3. Q: How many inputs does MM74HC161M have? A: MM74HC161M has four inputs - two clock inputs (CP and CP_), a synchronous load input (PL), and an asynchronous reset input (MR).

  4. Q: What is the maximum clock frequency for MM74HC161M? A: The maximum clock frequency for MM74HC161M is typically around 25 MHz.

  5. Q: Can MM74HC161M be cascaded to create larger counters? A: Yes, MM74HC161M can be cascaded to create larger counters by connecting the carry output (TC) of one counter to the clock input (CP) of the next counter.

  6. Q: What is the purpose of the synchronous load input (PL)? A: The synchronous load input (PL) allows the counter to be loaded with a specific value when the PL input is high and the clock input transitions from low to high.

  7. Q: How does the asynchronous reset input (MR) work? A: When the asynchronous reset input (MR) is low, it resets the counter to its initial state (all outputs low).

  8. Q: Can MM74HC161M count in both up and down directions? A: No, MM74HC161M can only count in the up direction. For counting in the down direction, a separate counter or additional logic is required.

  9. Q: What is the maximum count value of MM74HC161M? A: The maximum count value of MM74HC161M is 15 (1111 in binary) since it is a 4-bit counter.

  10. Q: What are some common applications of MM74HC161M? A: MM74HC161M is commonly used in applications such as frequency dividers, event counters, digital clocks, and general-purpose counting circuits.

Please note that the answers provided here are general and may vary depending on specific datasheet specifications and application requirements.