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TCA9406DCUR

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

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TCA9406DCUR General Description

The TCA9406 is a 2-bit bidirectional IC 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 IC and SMBus operation or other open-drain configurations, the TCA9406 can support up to 2 Mbps; therefore, it is compatible with standard IC 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.

tca9406dcur tca9406dcur

Key Features

  • 2-Bit Bidirectional Translator for SDA and SCL Lines in I2CApplications
  • Provides Bidirectional Voltage Translation With No DirectionPin
  • High-Impedance Output SCL_A, SDA_A, SCL_B, SDA_B Pins When OE = Low orVCC = 0 V
  • Internal 10-kΩ Pullup Resistor on All SDA andSCL 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 VCCInput Is at GND, Both Ports Are in the High-Impedance State
  • No Power-Supply Sequencing Required: Either VCCA orVCCB Can Be Ramped First
  • Low Ioff of 2 μA When Either VCCA orVCCB = 0 V
  • OE Input Can Be Tied Directly toVCCA 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)

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tca9406dcur TCA9406DCUR

Application

  • Voltage Level Translation
  • GPIO Expansion
  • Mixed Voltage Systems
  • I2C Bus Extension
  • Sensor Interfaces
  • Battery-Powered Devices

Specifications

Category Integrated Circuits (ICs)LogicTranslators, Level Shifters Series TCA
Translator Type Voltage Level Channel Type Bidirectional
Number of Circuits 1 Channels per Circuit 2
Voltage - VCCA 1.65 V ~ 3.6 V Voltage - VCCB 2.3 V ~ 5.5 V
Input Signal - Output Signal -
Output Type Open Drain Data Rate 24Mbps
Operating Temperature -40°C ~ 85°C (TA) Features Auto-Direction Sensing
Mounting Type Surface Mount Base Product Number TCA9406
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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Ratings and Reviews

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B
B**s 04/27/2023

Mounted circuit work all regularly.If you want to get a flashing LED slower you can place a trimmer 1 Mohm instead that's 200 Kohm (Trimmer adjustment RP1).

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Availability: 7487 PCS

+BOM
Qty. Unit Price Ext. Price
1+ $0.614 $0.61
10+ $0.501 $5.01
30+ $0.443 $13.29
100+ $0.388 $38.80
500+ $0.354 $177.00
1000+ $0.336 $336.00

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