SN74LVC646ADBR

Product Overview

• Category: Integrated Circuit
• Use: Level Shifter and Bus Transceiver
• Characteristics: High-speed, low-voltage, CMOS technology
• Package: SSOP (Shrink Small Outline Package)
• Essence: Transfers data between different voltage domains
• Packaging/Quantity: Tape and Reel, 2500 pieces per reel

Specifications

• Supply Voltage Range: 1.65V to 3.6V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Maximum Operating Frequency: 80 MHz
• Number of Channels: 8
• Input/Output Type: Non-Inverting
• Propagation Delay: 4.5 ns (Max)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The SN74LVC646ADBR has a total of 24 pins. The pin configuration is as follows:

1. OE (Output Enable) 1
2. I/O1 (Bidirectional Data I/O) 1
3. I/O2 (Bidirectional Data I/O) 2
4. GND (Ground)
5. I/O3 (Bidirectional Data I/O) 3
6. I/O4 (Bidirectional Data I/O) 4
7. VCC (Supply Voltage)
8. I/O5 (Bidirectional Data I/O) 5
9. I/O6 (Bidirectional Data I/O) 6
10. I/O7 (Bidirectional Data I/O) 7
11. I/O8 (Bidirectional Data I/O) 8
12. DIR (Direction Control)
13. GND (Ground)
14. A1 (Address Input) 1
15. A2 (Address Input) 2
16. A3 (Address Input) 3
17. GND (Ground)
18. OE (Output Enable) 2
19. I/O9 (Bidirectional Data I/O) 9
20. I/O10 (Bidirectional Data I/O) 10
21. VCC (Supply Voltage)
22. I/O11 (Bidirectional Data I/O) 11
23. I/O12 (Bidirectional Data I/O) 12
24. I/O13 (Bidirectional Data I/O) 13

Functional Features

• Bidirectional voltage level shifting between two voltage domains
• Non-inverting data transfer
• High-speed operation with low propagation delay
• Output enable control for disabling the outputs
• Direction control for selecting the direction of data transfer

Advantages and Disadvantages

Advantages

• Supports level shifting between different voltage domains
• High-speed operation allows for efficient data transfer
• Non-inverting nature preserves the integrity of the data
• Output enable control provides flexibility in enabling/disabling outputs
• Direction control allows for bidirectional data transfer

Disadvantages

• Limited to a maximum operating frequency of 80 MHz
• Requires careful consideration of voltage compatibility between domains

Working Principles

The SN74LVC646ADBR is designed to facilitate the transfer of data between two voltage domains. It utilizes CMOS technology to achieve high-speed operation while operating at low voltages. The device features bidirectional data transfer, allowing data to flow in both directions. The non-inverting nature of the device ensures that the data integrity is preserved during the transfer process.

The output enable control allows the user to disable the outputs when not required, conserving power and reducing noise. The direction control pin determines the direction of data transfer, enabling flexibility in the system design.

Detailed Application Field Plans

The SN74LVC646ADBR is commonly used in various applications that require level shifting and bus transceiver functionality. Some of the typical application fields include:

1. Communication Systems: The device can be used to interface between different voltage domains in communication systems, such as UART, SPI, or I2C interfaces.

2. Microcontroller Interfacing: It enables communication between microcontrollers operating at different voltage levels, allowing seamless integration of multiple microcontrollers in a system.

3. Data Acquisition Systems: The device facilitates the transfer of data between sensors and microcontrollers, ensuring compatibility between different voltage levels.

4. Industrial Automation: It can be employed in industrial automation systems to enable communication between different subsystems operating at different voltage levels.

Detailed and Complete Alternative Models

• SN74LVC245A: Octal Bus Transceiver with 3-State Outputs
• SN74LVC4245A: Octal Bus Transceiver and Level Shifter with 3-State Outputs
• SN74LVC8T245: 8-Bit Dual-Supply Bus Transceiver with Configurable Voltage Translation

These alternative models offer similar functionality and can be considered