TCA9406 Series

2-bit bidirectional 1MHz I2C/SMBus voltage level translator with internal pull-up resistor

Catalog

2-bit bidirectional 1MHz I2C/SMBus voltage level translator with internal pull-up resistor

Part	Voltage - VCCA [Min]	Voltage - VCCA [Max]	Package / Case	Features	Supplier Device Package	Number of Circuits	Translator Type	Output Type	Channels per Circuit	Mounting Type	Voltage - VCCB [Min]	Voltage - VCCB [Max]	Data Rate	Operating Temperature [Max]	Operating Temperature [Min]	Channel Type	Package / Case [y]	Package / Case [y]	Supplied Contents	Function	Utilized IC / Part	Contents	Type
Texas Instruments TCA9406YZPR	1.65 V	3.6 V	8-XFBGA DSBGA	Auto-Direction Sensing	8-DSBGA	1	Voltage Level	Open Drain	2	Surface Mount	2.3 V	5.5 V	24 Mbps	85 °C	-40 °C	Bidirectional
Texas Instruments TCA9406DCTR	1.65 V	3.6 V		Auto-Direction Sensing	SM8	1	Voltage Level	Open Drain	2	Surface Mount	2.3 V	5.5 V	24 Mbps	85 °C	-40 °C	Bidirectional
Texas Instruments TCA9406DCUR	1.65 V	3.6 V	8-VFSOP	Auto-Direction Sensing		1	Voltage Level	Open Drain	2	Surface Mount	2.3 V	5.5 V	24 Mbps	85 °C	-40 °C	Bidirectional	2.3 mm	0.091 in
Texas Instruments TCA9406EVM																			Board(s)	I2C Bus Buffer	TCA9406	Board(s)	Interface

Catalog

2-bit bidirectional 1MHz I2C/SMBus voltage level translator with internal pull-up resistor

Key Features

• 2-Bit Bidirectional Translator for SDA and SCL Lines in I2C ApplicationsProvides Bidirectional Voltage Translation With No Direction PinHigh-Impedance Output SCL_A, SDA_A, SCL_B, SDA_B Pins When OE = Low or VCC= 0 VInternal 10-kΩ Pullup Resistor on All SDA and SCL Pins1.65 V to 3.6 V on A port and 2.3 V to 5.5 V on B port (VCCA≤ VCCB)VCCIsolation Feature: If Either VCCInput Is at GND, Both Ports Are in the High-Impedance StateNo Power-Supply Sequencing Required: Either VCCAor VCCBCan Be Ramped FirstLow Ioffof 2 µA When Either VCCAor VCCB= 0 VOE Input Can Be Tied Directly to VCCAOr Controlled By GPIOLatch-Up Performance Exceeds 100 mA Per JESD 78, Class IIESD Protection Exceeds JESD 22A Port2500-V Human-Body Model (A114-B)250-V Machine Model (A115-A)1500-V Charged-Device Model (C101)B Port8-kV Human-Body Model (A114-B)250-V Machine Model (A115-A)1500-V Charged-Device Model (C101)2-Bit Bidirectional Translator for SDA and SCL Lines in I2C ApplicationsProvides Bidirectional Voltage Translation With No Direction PinHigh-Impedance Output SCL_A, SDA_A, SCL_B, SDA_B Pins When OE = Low or VCC= 0 VInternal 10-kΩ Pullup Resistor on All SDA and SCL Pins1.65 V to 3.6 V on A port and 2.3 V to 5.5 V on B port (VCCA≤ VCCB)VCCIsolation Feature: If Either VCCInput Is at GND, Both Ports Are in the High-Impedance StateNo Power-Supply Sequencing Required: Either VCCAor VCCBCan Be Ramped FirstLow Ioffof 2 µA When Either VCCAor VCCB= 0 VOE Input Can Be Tied Directly to VCCAOr Controlled By GPIOLatch-Up Performance Exceeds 100 mA Per JESD 78, Class IIESD Protection Exceeds JESD 22A Port2500-V Human-Body Model (A114-B)250-V Machine Model (A115-A)1500-V Charged-Device Model (C101)B Port8-kV Human-Body Model (A114-B)250-V Machine Model (A115-A)1500-V Charged-Device Model (C101)

Description

The TCA9406 is a 2-bit bidirectional I2C and SMBus voltage-level translator with an output enable (OE) input. It is operational from 1.65 V to 3.6 V on the A-side, referenced toVCCA, and from 2.3 V to 5.5 V on the B-side, referenced to VCCB. This allows the device to interface between lower and higher logic signal levels at any of the typical 1.8-V, 2.5-V, 3.3-V, and5-V supply rails. The OE input pin is referenced to VCCA, can be tied directly to VCCA, but it is also 5.5-V tolerant. The OE pin can also be controlled and set to a logic low to place all the SCL and SDA pins in a high-impedance state, which significantly reduces the quiescent current consumption. Under normal I2C and SMBus operation or other open-drain configurations, the TCA9406 can support up to 2 Mbps; therefore, it is compatible with standard I2C speeds where the frequency of SCL is 100 kHz (Standard-mode), 400 kHz (Fast-mode), or 1 MHz (Fast-mode Plus). The device can also be used as a general purpose level translator, and when the A- and B-side ports are both driven with push-pull devices the TCA9406 can support up to 24 Mbps. The TCA9406 features internal 10-kΩ pullup resistors on SCL_A, SDA_A, SCL_B, and SDA_B. Additional external pullup resistors can be added to the bus to reduce the total pullup resistance and speed up rising edges. The TCA9406 is a 2-bit bidirectional I2C and SMBus voltage-level translator with an output enable (OE) input. It is operational from 1.65 V to 3.6 V on the A-side, referenced toVCCA, and from 2.3 V to 5.5 V on the B-side, referenced to VCCB. This allows the device to interface between lower and higher logic signal levels at any of the typical 1.8-V, 2.5-V, 3.3-V, and5-V supply rails. The OE input pin is referenced to VCCA, can be tied directly to VCCA, but it is also 5.5-V tolerant. The OE pin can also be controlled and set to a logic low to place all the SCL and SDA pins in a high-impedance state, which significantly reduces the quiescent current consumption. Under normal I2C and SMBus operation or other open-drain configurations, the TCA9406 can support up to 2 Mbps; therefore, it is compatible with standard I2C speeds where the frequency of SCL is 100 kHz (Standard-mode), 400 kHz (Fast-mode), or 1 MHz (Fast-mode Plus). The device can also be used as a general purpose level translator, and when the A- and B-side ports are both driven with push-pull devices the TCA9406 can support up to 24 Mbps. The TCA9406 features internal 10-kΩ pullup resistors on SCL_A, SDA_A, SCL_B, and SDA_B. Additional external pullup resistors can be added to the bus to reduce the total pullup resistance and speed up rising edges.