TCA9803DGKR

Translators, Level Shifters Overview

The TCA9803DGKR is a level-translating I2C bus buffer and repeater manufactured by Texas Instruments. It supports I2C and SMBus interfaces with a maximum clock frequency of 400 kHz. The device features two channels with open-drain input and output types. It operates within a supply voltage range of 800 mV to 3.6 V on the A side and 1.65 V to 3.6 V on the B side, consuming 45 uA of operating power. Propagation delays are specified at 15 ns and 120 ns. It functions in temperatures from -40 C to +85 C and is housed in an 8-VSSOP package.

Translators, Level Shifters Feature Summary

• Provides bidirectional level translation between different voltage domains for I2C and SMBus signals.
• Functions as a bus repeater to extend communication distance and increase fan-out capability.
• Supports standard mode operations up to 400 kHz clock frequency.

Translators, Level Shifters Applications

• Interfacing microcontrollers with sensors operating at different logic levels
• Extending I2C bus length in embedded systems
• Increasing I2C bus fan-out capacity

Translators, Level Shifters Procurement Notes

Verify the specific suffix 'DGKR' corresponds to the tape-and-reel packaging variant when ordering. Confirm that the voltage domain requirements align with the specified 800 mV to 3.6 V and 1.65 V to 3.6 V ranges. Ensure the application environment stays within the -40 C to +85 C operating temperature limits defined for this component.

Translators, Level Shifters Selection Notes

Select this component when bidirectional level shifting is required between low-voltage logic (down to 0.8 V) and higher voltage I2C buses. It is suitable for applications needing bus extension or increased fan-out beyond standard I2C limitations. Consider the 8-VSSOP package size for space-constrained designs requiring surface-mount installation.

Translators, Level Shifters Part Context

This part belongs to the TCA9803 series of level-shifting buffers. It is functionally similar to other Texas Instruments I2C translators like the TCA9517 but offers specific voltage translation capabilities. The DGKR suffix indicates the reel packaging format, distinguishing it from cut-tape or tube variants within the same functional family.

Translators, Level Shifters Replacement Considerations

The TCA9803DGKT is a direct pin-compatible alternative differing only in packaging type. Other potential substitutes include the TCA9517 series for basic repeating functions, though voltage translation specifications may vary. Verify interface compatibility and voltage ranges before substituting.