TCA9801DGKR

Translators, Level Shifters Overview

The TCA9801DGKR is a bidirectional I2C bus buffer and repeater manufactured by Texas Instruments. It operates with a VCCA supply range of 0.8V to 3.6V and a VCCB supply range of 1.65V to 3.6V, supporting maximum clock frequencies up to 400 kHz. The device features two channels within a single circuit, utilizing open-drain inputs and outputs. Propagation delays are specified at 25 ns for the high-to-low transition and 105 ns for the low-to-high transition. It functions within an operating temperature range of -40°C to +85°C and is housed in an 8-VSSOP package.

Translators, Level Shifters Feature Summary

• Provides bidirectional voltage level translation between low-voltage (0.8V) and standard-voltage (1.65V) domains
• Supports I2C and SMBus protocols with automatic direction sensing
• Functions as a signal buffer and repeater to extend bus distance

Translators, Level Shifters Applications

• Connecting microcontrollers operating at lower voltages to peripherals requiring higher logic levels
• Extending I2C bus length in embedded systems
• Level shifting between different voltage domains in mixed-signal circuits

Translators, Level Shifters Procurement Notes

Verify the specific suffix 'DGKR' corresponds to the tape-and-reel packaging variant rather than the 'DGKT' cut-tape version. Confirm that the component meets RoHS compliance requirements for your assembly process. Ensure the ordering quantity aligns with the manufacturer's standard reel size specifications to avoid partial reel handling issues during production.

Translators, Level Shifters Selection Notes

Select this component when interfacing devices with dissimilar supply voltages on the same I2C bus. It is suitable for applications requiring signal buffering or bus extension where standard pull-up resistors are insufficient. Consider the propagation delay characteristics if system timing margins are tight. Verify that the target peripheral supports the open-drain output configuration provided by this buffer.

Translators, Level Shifters Part Context

This part belongs to the TCA980x series of I2C bus buffers from Texas Instruments. It shares the same functional architecture and pinout compatibility with variants such as the TCA9801DGKT, differing primarily in packaging format. The series is designed specifically for managing voltage mismatches in I2C networks without requiring external components for level translation.

Translators, Level Shifters Replacement Considerations

The TCA9801DGKT serves as a direct functional equivalent with identical electrical specifications but utilizes cut-tape packaging instead of tape-and-reel.