CD74AC245EG4

Product Overview

• Category: Integrated Circuit
• Use: Signal Level Shifting and Bus Transceiver
• Characteristics: High-Speed, Low-Power, Bidirectional Data Transfer
• Package: 20-pin TSSOP (Thin Shrink Small Outline Package)
• Essence: Logic Level Conversion and Signal Transmission
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage: 2V to 6V
• Logic Family: AC
• Number of Channels: 8
• Input/Output Compatibility: TTL, CMOS
• Propagation Delay: 5.5 ns (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The CD74AC245EG4 has a total of 20 pins, which are assigned as follows:

1. OE (Output Enable) - Active LOW Output Enable Input
2. DIR (Direction Control) - Direction Control Input
3. A1 - Data Input/Output Channel 1
4. B1 - Data Input/Output Channel 1
5. A2 - Data Input/Output Channel 2
6. B2 - Data Input/Output Channel 2
7. A3 - Data Input/Output Channel 3
8. B3 - Data Input/Output Channel 3
9. A4 - Data Input/Output Channel 4
10. B4 - Data Input/Output Channel 4
11. GND (Ground) - Ground Reference
12. B5 - Data Input/Output Channel 5
13. A5 - Data Input/Output Channel 5
14. B6 - Data Input/Output Channel 6
15. A6 - Data Input/Output Channel 6
16. B7 - Data Input/Output Channel 7
17. A7 - Data Input/Output Channel 7
18. B8 - Data Input/Output Channel 8
19. A8 - Data Input/Output Channel 8
20. VCC (Supply Voltage) - Positive Power Supply

Functional Features

• Bidirectional Data Transfer: Allows data to be transmitted in both directions, making it suitable for bus transceiver applications.
• Logic Level Conversion: Converts signals between different logic families, such as TTL and CMOS.
• High-Speed Operation: Provides fast data transfer with a typical propagation delay of 5.5 ns.
• Low-Power Consumption: Operates at low power levels, making it energy-efficient.

Advantages and Disadvantages

Advantages

• Versatile: Can be used in various applications requiring signal level shifting and bus transceiver functionality.
• Wide Operating Voltage Range: Supports supply voltages from 2V to 6V, providing flexibility in different systems.
• Compact Package: The TSSOP package offers a small footprint, saving board space.
• Reliable Performance: Manufactured by a reputable brand known for producing high-quality integrated circuits.

Disadvantages

• Limited Channel Count: The CD74AC245EG4 has 8 channels, which may not be sufficient for applications requiring a higher number of data lines.
• Temperature Constraints: The operating temperature range is limited to -40°C to +85°C, which may restrict its use in extreme temperature environments.

Working Principles

The CD74AC245EG4 operates based on the principles of digital logic. It uses internal circuitry to control the direction of data flow and perform logic level conversion. When the DIR pin is set to a specific logic level, the device determines the direction of data transmission accordingly. The OE pin enables or disables the output buffers, allowing control over the data transfer. The integrated circuit utilizes advanced semiconductor technology to ensure reliable and efficient signal transmission.

Detailed Application Field Plans

The CD74AC245EG4 finds applications in various fields where signal level shifting and bus transceiver capabilities are required. Some of the common application areas include:

1. Microcontroller Interfacing: Facilitates communication between microcontrollers operating at different logic levels.
2. Data Communication Systems: Enables data transfer between devices with varying voltage requirements, such as UART, SPI, or I2C interfaces.
3. Industrial Automation: Used in industrial control systems for interfacing sensors, actuators, and other peripheral devices.
4. Automotive Electronics: Supports signal conversion and transmission in automotive electronic systems, including infotainment, body control modules, and engine management systems.
5. Consumer Electronics: Utilized in devices like smartphones, tablets, and gaming consoles for level shifting and data exchange between different components.

Detailed and Complete Alternative Models

• SN74LV245A: Low-Voltage Octal Bus Transceiver
• MC74VHC245: High-Speed CMOS Octal Bus Transceiver
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