The TCA9803DGKR is a high-performance, dual-channel bidirectional I2C/SMBus level-translating buffer and repeater manufactured by Texas Instruments (TI). Designed for reliable communication between devices operating at different logic voltage levels, this IC supports I2C clock frequencies up to 400kHz and provides an efficient solution for modern digital interface applications.
Featuring an A-side supply voltage range of 0.8V to 3.6V and a B-side supply voltage range of 1.65V to 3.6V, the TCA9803DGKR enables bidirectional voltage level translation between low-voltage processors, microcontrollers, sensors, and peripheral devices.
The device integrates a current source of approximately 3mA on the B-side, eliminating the need for external B-side pull-up resistors and helping improve signal rise times. Its true buffering architecture provides low output-low voltage without requiring a static voltage offset.
Housed in a compact 8-pin VSSOP package, the TCA9803DGKR supports space-efficient PCB designs and automated surface-mount assembly. With an operating temperature range of -40°C to +125°C, it is suitable for industrial equipment, networking systems, servers, computers, and power-sensitive applications.
Key Features:
- Manufacturer: Texas Instruments (TI)
- Part Number: TCA9803DGKR
- Product Category: Interface ICs
- Product Type: I2C/SMBus Bus Buffer and Level Translator
- Number of Channels: 2 (SDA and SCL)
- Signal Direction: Bidirectional
- Maximum Operating Frequency: 400kHz
- A-Side Supply Voltage (VCCA): 0.8V to 3.6V
- B-Side Supply Voltage (VCCB): 1.65V to 3.6V
- Integrated B-Side Current Source: Approximately 3mA
- B-Side External Pull-Up Resistors: Not Required
- Repeater Enable: Active-High EN Input
- Output Characteristics: Low VOL, No Static Voltage Offset
- Special Features: Clock Stretching and Multi-Master Arbitration Support
- Power Features: Low Power Consumption and Back-Power Protection
- Operating Temperature Range: -40°C to +125°C
- Package: 8-VSSOP (DGK)
- Mounting Type: Surface Mount (SMD/SMT)
- Packaging: Tape and Reel
- Standard Reel Quantity: 2,500 Pieces
- RoHS Compliance: RoHS Compliant
Typical Applications:
- I2C and SMBus voltage level translation
- Microcontroller and sensor communication
- Industrial automation and control systems
- Servers and networking equipment
- Routers and communication systems
- Embedded computing platforms
- Low-voltage digital interface circuits
- Power-sensitive electronic devices
The Texas Instruments TCA9803DGKR combines bidirectional level translation, true bus buffering, an integrated B-side current source, and compact packaging to provide a reliable solution for I2C/SMBus communication.
Its flexible supply voltage configuration and support for standard I2C communication features make it an excellent choice for electronic manufacturers, embedded system developers, and design engineers requiring efficient voltage level translation and bus signal buffering.
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