CD74HCT245EG4

Product Overview

• Category: Integrated Circuit
• Use: Level Shifting and Signal Conditioning
• Characteristics: High-Speed, CMOS Logic, Octal Bus Transceiver
• Package: 20-pin TSSOP (Thin Shrink Small Outline Package)
• Essence: Transfers Data Between Buses Operating at Different Voltage Levels
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 2V to 6V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Maximum Input Current: ±1mA
• Maximum Output Current: ±6mA
• Propagation Delay Time: 13ns (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The CD74HCT245EG4 has a total of 20 pins. The pin configuration is as follows:

1. OE (Output Enable) - Active Low Output Enable
2. A1 - Data Input/Output for Port A
3. B1 - Data Input/Output for Port B
4. A2 - Data Input/Output for Port A
5. B2 - Data Input/Output for Port B
6. A3 - Data Input/Output for Port A
7. B3 - Data Input/Output for Port B
8. GND (Ground) - Ground Reference
9. B4 - Data Input/Output for Port B
10. A4 - Data Input/Output for Port A
11. B5 - Data Input/Output for Port B
12. A5 - Data Input/Output for Port A
13. B6 - Data Input/Output for Port B
14. A6 - Data Input/Output for Port A
15. B7 - Data Input/Output for Port B
16. A7 - Data Input/Output for Port A
17. VCC - Positive Power Supply
18. DIR (Direction Control) - Direction Control Input
19. GND (Ground) - Ground Reference
20. OE (Output Enable) - Active Low Output Enable

Functional Features

• High-Speed CMOS Logic: Allows for fast data transfer between buses.
• Octal Bus Transceiver: Transfers data bidirectionally between two buses.
• Level Shifting and Signal Conditioning: Enables communication between buses operating at different voltage levels.
• Output Enable (OE) Pin: Controls the direction of data flow.
• Direction Control (DIR) Pin: Determines the direction of data transfer.

Advantages and Disadvantages

Advantages: - High-speed operation allows for efficient data transfer. - CMOS logic ensures low power consumption. - Octal bus transceiver enables bidirectional data transfer. - Wide supply voltage range provides flexibility in various applications.

Disadvantages: - Limited output current may restrict use in high-current applications. - Propagation delay time may affect real-time data transfer in certain scenarios.

Working Principles

The CD74HCT245EG4 is designed to transfer data bidirectionally between two buses operating at different voltage levels. It utilizes level shifting and signal conditioning techniques to ensure compatibility between the input and output voltage levels. The direction of data flow is controlled by the Output Enable (OE) pin, while the Direction Control (DIR) pin determines the direction of data transfer. The high-speed CMOS logic allows for efficient and reliable data transmission.

Detailed Application Field Plans

The CD74HCT245EG4 finds applications in various fields where level shifting and signal conditioning are required. Some common application areas include:

1. Industrial Automation: Used for interfacing between different voltage level devices in control systems.
2. Communication Systems: Facilitates data transfer between buses operating at different voltage levels in networking equipment.
3. Automotive Electronics: Enables communication between various subsystems with different voltage requirements.
4. Consumer Electronics: Used in devices such as smartphones, tablets, and gaming consoles for level shifting purposes.
5. Medical Equipment: Allows for data exchange between medical devices operating at different voltage levels.

Detailed and Complete Alternative Models

1. SN74HCT245N: Similar octal bus transceiver with a DIP (Dual In-line Package) package.
2. 74HC245: Octal bus transceiver with TTL logic levels and a wider supply voltage range.
3. CD74HC244E: Octal buffer/line driver with similar characteristics but without the bidirectional capability.

These alternative models provide similar functionality to the CD74HCT245EG4 and can be considered based on specific application requirements.

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