TCA9406DCUR

TCA9406DCUR 2-Bit Bidirectional 1MHz I2C-Bus and SMBus Voltage Level Translator

describe

The TCA9406 is a 2-bit bidirectional I2C and SMBus voltage level translator with an output enable (OE) input. It operates from 1.65V to 3.6V on the A side with a reference of VCCA and on the B side from 2.3V to 5.5V with a reference of VCCB. Therefore, the device is capable of switching any high or low logic signal level between the typical 1.8V, 2.5V, 3.3V and 5V supply rails.

The OE input pin is referenced to VCCA and can be connected directly to VCCA, but is also 5.5V tolerant. The user also has control over the OE pin, setting it low to keep all SCL and SDA pins in a high impedance state, significantly reducing quiescent current consumption.

In normal I2C and SMBus operating configurations or other open-drain configurations, the TCA9406 can support speeds up to 2Mbps, so it can meet standard I2C speed requirements, ie SCL frequencies of 100kHz (standard mode), 400kHz (fast mode), or 1MHz (Quick mode upgrade). The device can also be used as a general-purpose level translator, and the TCA9406 supports speeds up to 24Mbps when both the A-side and B-side ports are driven by push-pull devices.

The TCA9406 has internal 10kΩ pull-up resistors on SCL_A, SDA_A, SCL_B and SDA_B. You can also add additional pull-up resistors to the bus, reducing the total pull-up resistance and speeding up rising edges

characteristic

2-Bit Bidirectional Converter Converter for SDA and SCL Lines in I2C Applications

Provides bidirectional voltage translation with non-directional pins

High impedance output SCL_A, SDA_A, SCL_B, SDA_B pins (when OE = low or VCC = 0V)

Internal 10kΩ pull-up resistors on all SDA and SCL pins

1.65V to 3.6V on A port, 2.3V to 5.5V on B port (VCCA ≤ VCCB)

VCC isolation feature: if either VCC input is grounded (GND), both ports are in a high-impedance state

No power supply sequencing required: either VCCA or VCCB can be ramped first

Ioff as low as 2μA when VCCA or VCCB = 0V

OE input can be connected directly to VCCA or controlled via GPIO

Latch-up performance exceeds the 100mA required by the JESD 78 Class II specification

Electrostatic discharge (ESD) protection exceeds the requirements of the JESD 22 specification

A port

2500V Human Body Discharge Model (A114-B)

250V Machine Discharge Mode (A115-A)

1500V Charging Device Model (C101)

B port

8kV Human Body Model (A114-B)

250V Machine Discharge Mode (A115-A)

1500V Charging Device Model (C101)

TI Texas Instruments original authentic

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