TCA9406 TCA9406 Dual Bidirectional 1-MHz I2C-BUS and SMBus Voltage Level-Translator

 

TCA9406

TCA9406 Dual Bidirectional 1-MHz I2C-BUS and SMBus

Voltage Level-Translator

Description

The TCA9406 is a dual bidirectional I²C-Bus and SMBus Voltage-Level translator with enable (OE) Input. It is operational from 1.65 V to 3.6 V on A-Port and 2.3 V to 5.5 V on B-port. Enable (OE) input is referenced to V_CCA with a maximum input voltage tolerance of 4.6 V.

The TCA9406 can operate up to 24Mbps in push pull mode and 2Mbps with open drain mod. Its compatible with a standard I²C bus 100 kHz, 400 kHz and 1 MHz at both sides of A-Port and B-Port.

With the standard I²C bus system, it needs pull-up resistors to provide logic HIGH levels on the translator bus. The TCA9406 is an open-drain bus level configuration of the I²C-bus. The value of pullup resistors depends on the system, but each side of the translator must have pull-up resistors and TCA9406 already has 10 k pullup resistors on each side and it allows to add additional external pull-up resistors.

Features

• 2-Bit Bidirectional Translator for SDA and SCL Lines in Mixed-Mode I²C Applications
• Lock-Up Free for Bus Isolation when OE Control Pin referring to V_CCA with 5-V Input Tolerant
• Level Translation Range
  • 1.8 V to 2.5 V/3.3 V/5 V
  • 2.5 V to 2.5 V/3.3 V/5 V
  • 3.3 V to 3.3 V/5 V
• Internal10-k Pullup Resistor on Each Port and Option to Add External Pullup Resistor if Required
• Provides Bidirectional Voltage Translation With No Direction Pin
• I_off Support Partial Power Down (V_CC= 0 V) With 2 mA
• High-Impedance Output SCL1, SDA1, SCL2, and SDA2 Pins When OE = Low or V_CC= 0 V
• Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
• ESD Protection Exceeds JESD 22
  • A Port
    • 2500-V Human-Body Model (A114-B)
    • 250-V Machine Model (A115-A)
    • 1500-V Charged-Device Model (C101)
• B Port
  • 8-kV Human-Body Model (A114-B)
  • 250-V Machine Model (A115-A)
  • 1500-V Charged-Device Model (C101)

   

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