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TCA9406YZPR

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

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TCA9406YZPR General 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, and
5-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.

tca9406yzpr TCA9406YZPR

Key Features

  • 2-Bit Bidirectional Translator for SDA and SCL Lines in I2C Applications
  • Provides Bidirectional Voltage Translation With No Direction Pin
  • High-Impedance Output SCL_A, SDA_A, SCL_B, SDA_B Pins When OE = Low or VCC = 0 V
  • Internal 10-kΩ Pullup Resistor on All SDA and SCL Pins
  • 1.65 V to 3.6 V on A port and 2.3 V to 5.5 V on B port (VCCA ≤ VCCB)
  • VCC Isolation Feature: If Either VCC Input Is at GND, Both Ports Are in the High-Impedance State
  • No Power-Supply Sequencing Required: Either VCCA or VCCB Can Be Ramped First
  • Low Ioff of 2 µA When Either VCCA or VCCB = 0 V
  • OE Input Can Be Tied Directly to VCCA Or Controlled By GPIO
  • 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)
TCA9406YZPR TCA9406YZPR
TCA9406YZPR

Specifications

Features Enable pin Frequency (max) (MHz) 1
VCCA (min) (V) 1.65 VCCA (max) (V) 3.6
VCCB (min) (V) 2.3 VCCB (max) (V) 5.5
Supply restrictions VCCA <= VCCB Rating Catalog
Operating temperature range (°C) -40 to 85

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G
G**n 05/05/2021

It came all in the right amount, thank you!

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