TCA9802 Series

2-bit level-translating 400-kHz I2C/SMBus buffer/repeater with internal 2-mA current source

Catalog

2-bit level-translating 400-kHz I2C/SMBus buffer/repeater with internal 2-mA current source

Part	Type	Function	Supplied Contents	Utilized IC / Part	Operating Temperature [Min]	Operating Temperature [Max]	Voltage - VCCA [Min]	Voltage - VCCA [Max]	Translator Type	Channels per Circuit	Mounting Type	Voltage - VCCB [Max]	Voltage - VCCB [Min]	Channel Type	Number of Circuits	Output Type	Package / Case	Package / Case [custom]	Package / Case
Texas Instruments TCA9802EVM	Interface	Logic-Level Translator	Board(s)	TCA9802
Texas Instruments TCA9802DGKT					-40 °C	125 °C	0.8 V	3.6 V	Voltage Level	2	Surface Mount	3.6 V	1.65 V	Bidirectional	1	Non-Inverted	8-MSOP 8-TSSOP	0.118 in	3 mm

Catalog

2-bit level-translating 400-kHz I2C/SMBus buffer/repeater with internal 2-mA current source

Key Features

• Two-channel bidirectional bufferIntegrated current source on B-side, requires no external B-side resistorsUltra-low power consumptionNo static-voltage offset, low VOLI2C bus and SMBus compatibleOperating supply voltage range of 0.8 V to 3.6 V on A-sideOperating supply voltage range of 1.65 V to 3.6 V on B-sideActive-high repeater enable inputPowered-off high impedance I2C bus pins on A-sidePowered-off back-power protection I2C bus pinsSupport for clock stretching and multiple master arbitrationFamily of current source options from 0.5 mA to 3 mATwo-channel bidirectional bufferIntegrated current source on B-side, requires no external B-side resistorsUltra-low power consumptionNo static-voltage offset, low VOLI2C bus and SMBus compatibleOperating supply voltage range of 0.8 V to 3.6 V on A-sideOperating supply voltage range of 1.65 V to 3.6 V on B-sideActive-high repeater enable inputPowered-off high impedance I2C bus pins on A-sidePowered-off back-power protection I2C bus pinsSupport for clock stretching and multiple master arbitrationFamily of current source options from 0.5 mA to 3 mA

Description

The TCA9802 is a dual-channel bidirectional buffer intended for I2C bus and SMBus/PMBus systems. It provides bidirectional level shifting (up-translation and down-translation) between low voltages (down to 0.8 V) and higher voltages (1.65 V to 3.6 V). The TCA9802 features an internal current source on the B-side of the device, allowing the removal of external pull-up resistors on the B-side. The current source also provides an improved rise time and ultra-low power consumption. The TCA9802 is able to provide true buffering (rather than a pass-FET solution) without using a static voltage offset or incremental offset. This means that the VOLon both the A and B sides of the TCA9802 are very low (approximately 0.2 V), helping to eliminate communication issues as a result of fixed VILthresholds. Another key feature of the TCA9802 is that there are no power sequencing requirements, or power supply dependencies. VCCAcan be greater than, less than, or equal to VCCB. This gives the system designer flexibility with how the TCA9802 is used. The TCA9802 is part of a four device family with varying current source strengths (see theDevice Comparison Table). The TCA9802 is a dual-channel bidirectional buffer intended for I2C bus and SMBus/PMBus systems. It provides bidirectional level shifting (up-translation and down-translation) between low voltages (down to 0.8 V) and higher voltages (1.65 V to 3.6 V). The TCA9802 features an internal current source on the B-side of the device, allowing the removal of external pull-up resistors on the B-side. The current source also provides an improved rise time and ultra-low power consumption. The TCA9802 is able to provide true buffering (rather than a pass-FET solution) without using a static voltage offset or incremental offset. This means that the VOLon both the A and B sides of the TCA9802 are very low (approximately 0.2 V), helping to eliminate communication issues as a result of fixed VILthresholds. Another key feature of the TCA9802 is that there are no power sequencing requirements, or power supply dependencies. VCCAcan be greater than, less than, or equal to VCCB. This gives the system designer flexibility with how the TCA9802 is used. The TCA9802 is part of a four device family with varying current source strengths (see theDevice Comparison Table).