TCA9802DGKT

Translators, Level Shifters Overview

The TCA9802DGKT is a two-channel bidirectional level-shifting buffer and repeater designed for I2C and SMBus interfaces. It operates with a maximum clock frequency of 400 kHz, supporting high-speed mode communication. The device accommodates dual power domains: VCCA ranges from 800 mV to 3.6 V, while VCCB ranges from 1.65 V to 3.6 V. Propagation delays are specified at 20 ns and 110 ns. Quiescent current is 34 uA. It utilizes an open-drain input/output configuration and is housed in an 8-pin VSSOP package. The operating temperature range spans from -40°C to +85°C.

Translators, Level Shifters Feature Summary

• Provides bidirectional voltage translation between different logic levels on I2C and SMBus lines
• Functions as a signal buffer and repeater to extend bus distance and increase drive capability
• Supports hot-swapping without generating spikes on the bus lines

Translators, Level Shifters Applications

• Interfacing low-voltage microcontrollers with higher-voltage peripheral devices
• Extending I2C bus length in embedded systems
• Connecting multiple I2C buses with different voltage requirements

Translators, Level Shifters Procurement Notes

Verify the specific suffix 'DGKT' corresponds to the VSSOP-8 package and tape-and-reel quantity of 250 units. Confirm RoHS compliance status through official Texas Instruments documentation. Ensure the ordering part number matches the required voltage range specifications for your application design.

Translators, Level Shifters Selection Notes

Select this component when interfacing I2C devices with mismatched supply voltages, specifically where one side operates below 1.65 V or above 3.6 V relative to the other. Consider the 400 kHz speed limit if faster data rates are required. Evaluate the 34 uA quiescent current against system power constraints. Verify that the VSSOP-8 package fits the PCB layout constraints.

Translators, Level Shifters Part Context

This part belongs to the TCA9802 series of I2C/SMBus level translators manufactured by Texas Instruments. It is distinct from the TCA9803, which offers similar functionality but may differ in propagation delay characteristics. Both are part of the broader interface IC portfolio designed for robust digital communication across varying voltage domains.

Translators, Level Shifters Replacement Considerations

TCA9803DGKT is a verified substitute within the same family, offering comparable level-shifting capabilities with potentially different propagation delay specifications.