MC74HCT245ADWR2G

Overview

• Category: Integrated Circuit (IC)
• Use: Level shifting and signal buffering
• Characteristics: High-speed, CMOS technology, 8-bit bidirectional transceiver
• Package: SOIC-20
• Essence: Transfers data between two buses with different voltage levels
• Packaging/Quantity: Tape and reel, 2500 units per reel

Specifications

• Supply Voltage: 2.0V to 6.0V
• Input Voltage: 0V to VCC
• Output Voltage: 0V to VCC
• Operating Temperature: -40°C to +85°C
• Propagation Delay: 13 ns (typical)
• Output Current: ±6 mA
• Input Capacitance: 3 pF (typical)

Pin Configuration

The MC74HCT245ADWR2G has a total of 20 pins. The pin configuration is as follows:

1. OE (Output Enable) - Active low output enable input
2. I/O0 - Bidirectional data I/O pin
3. I/O1 - Bidirectional data I/O pin
4. GND - Ground reference
5. I/O2 - Bidirectional data I/O pin
6. I/O3 - Bidirectional data I/O pin
7. VCC - Positive power supply
8. I/O4 - Bidirectional data I/O pin
9. I/O5 - Bidirectional data I/O pin
10. I/O6 - Bidirectional data I/O pin
11. I/O7 - Bidirectional data I/O pin
12. DIR (Direction Control) - Direction control input
13. GND - Ground reference
14. NC (No Connection) - No electrical connection
15. A0 - Address input
16. A1 - Address input
17. A2 - Address input
18. GND - Ground reference
19. I/O8 - Bidirectional data I/O pin
20. I/O9 - Bidirectional data I/O pin

Functional Features

The MC74HCT245ADWR2G is a high-speed CMOS transceiver that can transfer data bidirectionally between two buses with different voltage levels. It operates as a level shifter and signal buffer, allowing seamless communication between systems operating at different voltage levels. The device features an active low output enable (OE) input and a direction control (DIR) input to control the data flow.

Advantages and Disadvantages

Advantages: - High-speed operation - Wide supply voltage range - Low power consumption - Bidirectional data transfer capability - Easy to use and integrate into existing systems

Disadvantages: - Limited number of bidirectional data I/O pins - Not suitable for applications requiring higher current handling capacity

Working Principles

The MC74HCT245ADWR2G utilizes CMOS technology to achieve high-speed data transfer between two buses. The direction control (DIR) input determines the direction of data flow, while the output enable (OE) input enables or disables the data output. When the DIR input is set to logic high, data is transferred from the A bus to the B bus. Conversely, when the DIR input is set to logic low, data is transferred from the B bus to the A bus. The device operates within the specified supply voltage range and provides reliable level shifting and buffering capabilities.

Detailed Application Field Plans

The MC74HCT245ADWR2G finds applications in various fields where level shifting and signal buffering are required. Some potential application areas include:

1. Embedded Systems: Used to interface microcontrollers operating at different voltage levels with peripheral devices.
2. Communication Systems: Facilitates data transfer between systems operating at different voltage domains, such as UART communication between a 3.3V microcontroller and a 5V device.
3. Industrial Automation: Enables communication between sensors, actuators, and control systems operating at different voltage levels.
4. Automotive Electronics: Used in automotive applications to interface different subsystems with varying voltage requirements, such as infotainment systems and vehicle control modules.

Detailed and Complete Alternative Models

1. SN74HCT245N: Similar functionality and pin configuration, available in DIP-20 package.
2. CD74HCT245E: Equivalent performance and features, available in PDIP-20 package.
3. 74HCT245D: Comparable specifications and characteristics, available in SOIC-20 package.

These alternative models provide similar level shifting and signal buffering capabilities, allowing users to choose the most suitable option based on their specific requirements.

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