ON Semiconductor
Imej mungkin representasi.
Lihat spesifikasi untuk butiran produk.
MC74AC245N
Lihat Butiran Helaian data

MC74AC245N

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Signal level shifting and voltage translation
  • Characteristics: High-speed, octal bus transceiver, non-inverting
  • Package: DIP (Dual In-line Package)
  • Essence: Transfers data between two bidirectional buses with different voltage levels
  • Packaging/Quantity: Available in tubes of 25 units or reels of 2500 units

Specifications

  • Supply Voltage: 2V to 6V
  • Input Voltage: 0V to VCC
  • Output Voltage: 0V to VCC
  • Operating Temperature: -40°C to +85°C
  • Propagation Delay: 5ns (typical)
  • Output Drive Capability: ±24mA

Detailed Pin Configuration

The MC74AC245N has a total of 20 pins. The pin configuration is as follows:

  1. OE (Output Enable) - Output control pin
  2. A1-A8 (Input/Output) - Bidirectional data bus pins
  3. B1-B8 (Input/Output) - Bidirectional data bus pins
  4. GND (Ground) - Ground reference
  5. VCC (Power Supply) - Positive power supply
  6. DIR (Direction Control) - Direction control pin

Functional Features

  • High-speed operation allows for efficient data transfer
  • Non-inverting feature preserves the logic state of the input signal
  • Bidirectional capability enables data transmission in both directions
  • Output enable pin provides control over the output state
  • Direction control pin determines the direction of data flow

Advantages and Disadvantages

Advantages: - High-speed operation ensures fast data transfer - Non-inverting feature maintains signal integrity - Bidirectional capability allows for versatile data transmission - Output enable pin provides flexibility in controlling the output state

Disadvantages: - Limited voltage range (2V to 6V) - Propagation delay may affect timing-sensitive applications

Working Principles

The MC74AC245N is an octal bus transceiver that facilitates bidirectional data transfer between two buses with different voltage levels. It operates by using a direction control pin to determine the direction of data flow. The non-inverting feature ensures that the logic state of the input signal is preserved during the translation process. The output enable pin allows for control over the output state, enabling or disabling the data transmission.

Detailed Application Field Plans

The MC74AC245N is commonly used in various applications, including:

  1. Microcontroller interfacing
  2. Level shifting in communication systems
  3. Data transfer between different voltage domains
  4. Bus buffering and isolation
  5. Industrial automation systems
  6. Automotive electronics

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to the MC74AC245N are:

  1. SN74LV245A - Low-voltage octal bus transceiver
  2. CD74HCT245 - High-speed CMOS octal bus transceiver
  3. 74HC245 - High-speed CMOS octal bus transceiver
  4. 74LS245 - Low-power Schottky octal bus transceiver
  5. CD4050 - Hex non-inverting buffer/converter

These alternative models offer similar functionality and can be used as replacements based on specific requirements.

Word count: 314 words

Senaraikan 10 soalan dan jawapan biasa yang berkaitan dengan aplikasi MC74AC245N dalam penyelesaian teknikal

Sure! Here are 10 common questions and answers related to the application of MC74AC245N in technical solutions:

  1. Q: What is MC74AC245N? A: MC74AC245N is a popular octal bus transceiver integrated circuit (IC) that can be used for bidirectional data transfer between different voltage levels.

  2. Q: What is the maximum operating voltage for MC74AC245N? A: The maximum operating voltage for MC74AC245N is typically 5.5V.

  3. Q: Can MC74AC245N handle level shifting between different voltage domains? A: Yes, MC74AC245N is designed to handle level shifting between different voltage domains, making it suitable for interfacing between devices with different logic levels.

  4. Q: How many data lines can MC74AC245N handle? A: MC74AC245N can handle up to 8 bidirectional data lines.

  5. Q: Is MC74AC245N compatible with both TTL and CMOS logic families? A: Yes, MC74AC245N is compatible with both TTL and CMOS logic families, allowing it to work with a wide range of devices.

  6. Q: Does MC74AC245N have built-in protection against electrostatic discharge (ESD)? A: Yes, MC74AC245N typically has built-in ESD protection to safeguard against damage from static electricity.

  7. Q: What is the typical propagation delay of MC74AC245N? A: The typical propagation delay of MC74AC245N is around 6-8 nanoseconds.

  8. Q: Can MC74AC245N be used in high-speed applications? A: Yes, MC74AC245N is capable of operating at high speeds, making it suitable for applications that require fast data transfer.

  9. Q: Can MC74AC245N be used in both parallel and serial communication systems? A: Yes, MC74AC245N can be used in both parallel and serial communication systems, depending on the specific application requirements.

  10. Q: Are there any special considerations for PCB layout when using MC74AC245N? A: Yes, it is recommended to follow proper PCB layout guidelines, such as minimizing trace lengths, providing adequate decoupling capacitors, and ensuring proper signal integrity, to optimize the performance of MC74AC245N in your design.

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