SN74LVCH245AZQNR

Product Overview

• Category: Integrated Circuit
• Use: Level Shifter/Transceiver
• Characteristics: Low-Voltage, High-Speed, Non-Inverting
• Package: 20-pin TSSOP (Thin Shrink Small Outline Package)
• Essence: Bi-directional voltage level translator/transceiver
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 1.65V to 3.6V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Maximum Data Rate: 400 Mbps
• Number of Channels: 8
• Input/Output Type: CMOS/TTL Compatible

Detailed Pin Configuration

The SN74LVCH245AZQNR has a total of 20 pins, which are assigned as follows:

1. DIR - Direction Control Input
2. OE - Output Enable 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
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

Functional Features

• Bi-directional voltage level translation between two different voltage domains.
• Non-inverting operation preserves the logic state of the input signals.
• High-speed data transmission up to 400 Mbps.
• Wide supply voltage range allows compatibility with various systems.
• CMOS/TTL compatible inputs and outputs.

Advantages and Disadvantages

Advantages: - Allows interfacing between devices operating at different voltage levels. - Non-inverting operation simplifies signal integrity considerations. - High-speed data transmission enables efficient communication. - Wide supply voltage range provides flexibility in system design.

Disadvantages: - Limited number of channels (8) may not be sufficient for complex applications. - Requires careful consideration of voltage compatibility to avoid damage to connected devices.

Working Principles

The SN74LVCH245AZQNR is a bidirectional level shifter/transceiver that facilitates communication between two systems operating at different voltage levels. It uses a combination of CMOS and TTL compatible inputs and outputs to ensure compatibility with a wide range of devices.

The direction of data flow is controlled by the DIR pin, while the OE pin enables or disables the outputs. When the DIR pin is set to a specific logic level, the corresponding data channels allow bidirectional data transfer between the two voltage domains.

The non-inverting nature of the device ensures that the logic state of the input signals is preserved during translation, eliminating the need for additional signal conditioning circuitry.

Detailed Application Field Plans

The SN74LVCH245AZQNR is commonly used in various applications where voltage level translation is required. Some of the typical application fields include:

1. Microcontroller Interfacing: The level shifter enables communication between microcontrollers operating at different voltage levels, allowing seamless integration of multiple systems.

2. Sensor Networks: It facilitates data exchange between sensors and microcontrollers with varying voltage requirements, enabling efficient monitoring and control in IoT (Internet of Things) applications.

3. Communication Interfaces: The device is utilized in serial communication interfaces such as UART, SPI, and I2C to ensure compatibility between devices operating at different voltage levels.

4. Battery-Powered Systems: The low-voltage operation and wide supply voltage range make it suitable for battery-powered devices, extending the battery life while maintaining reliable communication.

Detailed and Complete Alternative Models

1. SN74LVC245A: Similar functionality with a lower maximum data rate of 200 Mbps.
2. SN74LVCH16245A: 16-channel bidirectional level shifter/transceiver.
3. SN74AVC4T245: 4-channel bidirectional level shifter/transceiver with integrated voltage translation.

These alternative models offer similar features and can be considered based on specific application requirements.

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