Texas Instruments
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SN74LS378D
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SN74LS378D

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Data Storage and Control
  • Characteristics: Octal D-Type Flip-Flop with Enable
  • Package: 20-pin Plastic Dual In-Line Package (PDIP)
  • Essence: High-speed, low-power TTL logic device
  • Packaging/Quantity: Available in tubes or reels, quantity varies based on supplier

Specifications

  • Logic Family: LS-TTL
  • Number of Flip-Flops: 8
  • Input Voltage Range: 0V to 5.5V
  • Operating Temperature Range: -40°C to +85°C
  • Propagation Delay Time: 15ns (typical)
  • Power Supply Voltage: 4.75V to 5.25V
  • Output Current: ±4mA
  • Maximum Clock Frequency: 33MHz

Detailed Pin Configuration

  1. GND (Ground)
  2. D0 (Data Input 0)
  3. D1 (Data Input 1)
  4. D2 (Data Input 2)
  5. D3 (Data Input 3)
  6. D4 (Data Input 4)
  7. D5 (Data Input 5)
  8. D6 (Data Input 6)
  9. D7 (Data Input 7)
  10. CP (Clock Pulse Input)
  11. CE (Clock Enable Input)
  12. MR (Master Reset Input)
  13. Q0 (Flip-Flop Output 0)
  14. Q1 (Flip-Flop Output 1)
  15. Q2 (Flip-Flop Output 2)
  16. Q3 (Flip-Flop Output 3)
  17. Q4 (Flip-Flop Output 4)
  18. Q5 (Flip-Flop Output 5)
  19. Q6 (Flip-Flop Output 6)
  20. VCC (Power Supply)

Functional Features

  • Octal D-Type Flip-Flop: The SN74LS378D consists of eight individual D-type flip-flops with common clock and enable inputs.
  • Clock Enable Input: The CE input allows the clock to control the state of the flip-flops. When CE is high, the flip-flops are enabled and respond to the clock input.
  • Master Reset Input: The MR input asynchronously resets all flip-flops when activated.
  • Data Inputs: The D0 to D7 inputs are used to set the initial state of each flip-flop.
  • Flip-Flop Outputs: The Q0 to Q7 outputs represent the current state of each flip-flop.

Advantages and Disadvantages

Advantages: - High-speed operation - Low-power consumption - Compact package size - Easy integration into digital circuits

Disadvantages: - Limited number of flip-flops (8 in this case) - Requires external clock and enable signals for proper operation

Working Principles

The SN74LS378D operates based on the principles of D-type flip-flops. Each flip-flop stores a single bit of data and can be controlled by clock and enable signals. The data inputs set the initial state of the flip-flops, and the outputs reflect their current state. The master reset input allows for asynchronous resetting of all flip-flops.

Detailed Application Field Plans

The SN74LS378D is commonly used in various applications, including: 1. Register banks in microprocessors and microcontrollers 2. Data storage and control in digital systems 3. Address decoding circuits 4. State machine implementations 5. Control units in communication systems

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the SN74LS378D include: - 74HC378: High-speed CMOS logic family - CD4013: Dual D-Type Flip-Flop IC - SN7474: Dual D-Type Positive-Edge-Triggered Flip-Flop

These alternatives can be considered based on specific project requirements and compatibility with existing circuitry.

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Énumérez 10 questions et réponses courantes liées à l'application de SN74LS378D dans les solutions techniques

Sure! Here are 10 common questions and answers related to the application of SN74LS378D:

  1. Q: What is SN74LS378D? A: SN74LS378D is a 4-bit universal shift register with parallel inputs and outputs, commonly used in digital circuits.

  2. Q: What is the purpose of a shift register? A: A shift register is used to store and transfer data serially or in parallel within a digital circuit.

  3. Q: How many bits can SN74LS378D store? A: SN74LS378D can store up to 4 bits of data.

  4. Q: Can SN74LS378D perform both left and right shifts? A: Yes, SN74LS378D can perform both left and right shifts depending on the control signals applied.

  5. Q: What is the maximum clock frequency for SN74LS378D? A: The maximum clock frequency for SN74LS378D is typically around 25 MHz.

  6. Q: Can SN74LS378D be cascaded to increase the number of bits stored? A: Yes, multiple SN74LS378D chips can be cascaded together to increase the number of bits stored.

  7. Q: What is the power supply voltage range for SN74LS378D? A: The power supply voltage range for SN74LS378D is typically between 4.75V and 5.25V.

  8. Q: Does SN74LS378D have any built-in error detection or correction features? A: No, SN74LS378D does not have any built-in error detection or correction features.

  9. Q: Can SN74LS378D be used in both synchronous and asynchronous applications? A: Yes, SN74LS378D can be used in both synchronous and asynchronous applications.

  10. Q: What are some common applications of SN74LS378D? A: SN74LS378D is commonly used in applications such as data storage, serial-to-parallel conversion, parallel-to-serial conversion, and shift register-based counters.

Please note that the answers provided here are general and may vary depending on specific circuit designs and requirements.