| Distributor | Stock | Pricing | MOQ | PKG | Lead Time | Date Code | On Order Quantity | On Order Delivery | |
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48 pcs
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48 pcs | On Request | 1 | On Request | On Request | On Request | On Request | On Request |
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| Tape & Reel |
The TCA9406 from STMicroelectronics is a 2-bit bidirectional translator designed for I2C and SMBus applications. It facilitates voltage translation between different logic levels, supporting 1.65 V to 3.6 V on the A port (referenced to VCCA) and 2.3 V to 5.5 V on the B port (referenced to VCCB). This allows seamless interfacing between typical supply rails such as 1.8V, 2.5V, 3.3V, and 5V.
The device features an output enable (OE) input, which can be tied to VCCA or controlled by a GPIO. When OE is low or VCC is at 0V, all SCL and SDA pins enter a high-impedance state, significantly reducing quiescent current. The TCA9406 includes internal 10-kΩ pullup resistors on all SDA and SCL lines. It supports standard I2C speeds up to 1 MHz and can handle up to 24 Mbps when used as a general-purpose level translator with push-pull devices.
ESD protection is robust, with the A port rated for 2500V HBM and the B port for 8kV HBM. Latch-up performance exceeds 100 mA per JESD 78, Class II. The device offers VCC isolation, ensuring both ports are high-impedance if either VCC input is at GND, and does not require specific power supply sequencing.
Available in SM8, US8, and DSBGA packages, the TCA9406 is suitable for various I2C, SMBus, UART, and GPIO applications requiring reliable voltage level translation.
| Qty | Low | High |
|---|---|---|
| 1+ | $2.95 | $2.95 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The TCA9406 operates from 1.65 V to 3.6 V on the A port and from 2.3 V to 5.5 V on the B port.
The A port has 2500-V Human-Body Model ESD protection, while the B port has 8-kV Human-Body Model ESD protection.
The TCA9406 supports standard I2C speeds up to 100 kHz, Fast-mode up to 400 kHz, and Fast-mode Plus up to 1 MHz.
Yes, the TCA9406 features internal 10-kΩ pull-up resistors on all SDA and SCL pins.
The quiescent current (Ioff) is 2 µA when either VCCA or VCCB is at 0 V.
The TCA9406 is available in SM8, US8, and DSBGA packages.