SN74LVC646APWT

Product Overview

• Category: Integrated Circuit (IC)
• Use: Bus Transceiver
• Characteristics: High-speed, low-voltage, 3-state outputs
• Package: TSSOP (Thin Shrink Small Outline Package)
• Essence: Transfers data between two bidirectional buses
• 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
• Operating Temperature Range: -40°C to +85°C
• Number of Pins: 24
• Logic Family: LVC (Low-Voltage CMOS)

Detailed Pin Configuration

The SN74LVC646APWT has a total of 24 pins, which are assigned specific functions as follows:

1. OE (Output Enable) - Active Low Output Enable
2. DIR (Direction Control) - Controls the direction of data flow
3. A1-A3 (Bus A Inputs/Outputs) - Bidirectional bus A inputs/outputs
4. GND (Ground) - Ground reference
5. B1-B3 (Bus B Inputs/Outputs) - Bidirectional bus B inputs/outputs
6. VCC (Supply Voltage) - Positive supply voltage
7. B4-B6 (Bus B Inputs/Outputs) - Bidirectional bus B inputs/outputs
8. GND (Ground) - Ground reference
9. A4-A6 (Bus A Inputs/Outputs) - Bidirectional bus A inputs/outputs
10. VCC (Supply Voltage) - Positive supply voltage
11. DIR (Direction Control) - Controls the direction of data flow
12. OE (Output Enable) - Active Low Output Enable 13-24. NC (No Connection) - Unused pins

Functional Features

The SN74LVC646APWT is a high-speed, low-voltage bus transceiver that allows bidirectional data transfer between two buses. It features 3-state outputs, which enable the device to be disconnected from the bus when not in use. This IC operates within a wide supply voltage range of 1.65V to 3.6V, making it suitable for various applications.

Advantages and Disadvantages

Advantages: - High-speed operation - Low-voltage compatibility - 3-state outputs for bus disconnection - Wide supply voltage range

Disadvantages: - Limited number of pins for data transfer - Not suitable for high-power applications

Working Principles

The SN74LVC646APWT functions as a bidirectional bus transceiver by controlling the direction of data flow between two buses (A and B). The DIR pin determines the direction, while the OE pin enables or disables the output. When the OE pin is active low, the outputs are enabled, allowing data to be transferred between the buses. Conversely, when the OE pin is inactive high, the outputs are disabled, disconnecting the device from the buses.

Detailed Application Field Plans

The SN74LVC646APWT is commonly used in various applications that require bidirectional data transfer between two buses. Some specific application fields include:

1. Microcontroller Interfacing: The IC can be used to interface microcontrollers with other devices or subsystems, enabling data exchange.
2. Communication Systems: It can be employed in communication systems to facilitate data transmission between different modules or components.
3. Data Acquisition: The IC can be utilized in data acquisition systems to transfer data between sensors, analog-to-digital converters, and digital processing units.
4. Industrial Automation: It finds applications in industrial automation systems where data needs to be exchanged between different control units or devices.

Detailed and Complete Alternative Models

1. SN74LVC245APW: 8-bit bidirectional bus transceiver with similar characteristics and package.
2. SN74LVC541APW: Octal buffer/line driver with 3-state outputs, suitable for bus driving applications.
3. SN74LVC573APW: Octal transparent latch with 3-state outputs, useful for temporary storage of data in bus systems.

These alternative models offer similar functionality and can be considered as substitutes for the SN74LVC646APWT depending on specific application requirements.

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