Product details

Features Enable Pin Frequency (Max) (kHz) 12500 VCCA (Min) (V) 0.85 VCCA (Max) (V) 5.5 VCCB (Min) (V) 1.65 VCCB (Max) (V) 5.5 Supply restrictions VCCA <= VCCB Rating Automotive Operating temperature range (C) -40 to 125
Features Enable Pin Frequency (Max) (kHz) 12500 VCCA (Min) (V) 0.85 VCCA (Max) (V) 5.5 VCCB (Min) (V) 1.65 VCCB (Max) (V) 5.5 Supply restrictions VCCA <= VCCB Rating Automotive Operating temperature range (C) -40 to 125
VSSOP (DCU) 8 6 mm² 2 x 3.1
  • 2-Bit bidirectional translator for SDA and SCL lines in mixed-mode I2C applications
  • Standard-mode, fast-mode, and fast-mode plus I2C and SMBus compatible
  • I3C compatible (12.5 MHz supported)
  • Allows voltage-level translation between
    • 0.9-V VREF1 and 1.8-V, 2.5-V, 3.3-V, or 5-V VREF2
    • 1.2-V VREF1 and 1.8-V, 2.5-V, 3.3-V, or 5-V VREF2
    • 1.8-V VREF1 and 2.5-V, 3.3-V, or 5-V VREF2
    • 2.5-V VREF1 and 3.3-V or 5-V VREF2
    • 3.3-V VREF1 and 5-V VREF2
  • Provides bidirectional voltage translation with no direction Pin
  • Low ON-state resistance between input and output ports provides less signal distortion
  • Open-drain I2C I/O ports (SCL1, SDA1, SCL2, and SDA2)
  • 5-V Tolerant I2C I/O ports to support mixed-mode signal operation
  • High-impedance SCL1, SDA1, SCL2, and SDA2 pins for EN = Low
  • Lockup-free operation for isolation when EN = Low
  • Flow-through pinout for ease of printed-circuit-board trace routing
  • ESD lrotection Exceeds JESD 22
    • 2000-V human-body model (A114-A)
    • 1000-V charged-device model (C101)
  • 2-Bit bidirectional translator for SDA and SCL lines in mixed-mode I2C applications
  • Standard-mode, fast-mode, and fast-mode plus I2C and SMBus compatible
  • I3C compatible (12.5 MHz supported)
  • Allows voltage-level translation between
    • 0.9-V VREF1 and 1.8-V, 2.5-V, 3.3-V, or 5-V VREF2
    • 1.2-V VREF1 and 1.8-V, 2.5-V, 3.3-V, or 5-V VREF2
    • 1.8-V VREF1 and 2.5-V, 3.3-V, or 5-V VREF2
    • 2.5-V VREF1 and 3.3-V or 5-V VREF2
    • 3.3-V VREF1 and 5-V VREF2
  • Provides bidirectional voltage translation with no direction Pin
  • Low ON-state resistance between input and output ports provides less signal distortion
  • Open-drain I2C I/O ports (SCL1, SDA1, SCL2, and SDA2)
  • 5-V Tolerant I2C I/O ports to support mixed-mode signal operation
  • High-impedance SCL1, SDA1, SCL2, and SDA2 pins for EN = Low
  • Lockup-free operation for isolation when EN = Low
  • Flow-through pinout for ease of printed-circuit-board trace routing
  • ESD lrotection Exceeds JESD 22
    • 2000-V human-body model (A114-A)
    • 1000-V charged-device model (C101)

The TCA39306-Q1 is a dual bidirectional voltage-level translator compatible with I2C, SMBus, and I3C with an enable (EN) input, and is operational from 0.9-V to 3.3-V VREF1 and 1.8-V to 5.5-V VREF2.

The device allows bidirectional voltage translations between 0.85 V and 5 V, without the use of a direction pin. The low ON-state resistance (RON) of the switch allows connections to be made with minimal propagation delay. When EN is high, the translator switch is ON, and the SCL1 and SDA1 I/O are connected to the SCL2 and SDA2 I/O, respectively, allowing bidirectional data flow between ports. When EN is low, the translator switch is off, and a high-impedance state exists between ports.

In addition to voltage translation, the TCA39306-Q1 can be used to isolate a higher speed bus from a lower speed bus by controlling the EN pin to disconnect the slower bus during fast-mode communication.

The TCA39306-Q1 is a dual bidirectional voltage-level translator compatible with I2C, SMBus, and I3C with an enable (EN) input, and is operational from 0.9-V to 3.3-V VREF1 and 1.8-V to 5.5-V VREF2.

The device allows bidirectional voltage translations between 0.85 V and 5 V, without the use of a direction pin. The low ON-state resistance (RON) of the switch allows connections to be made with minimal propagation delay. When EN is high, the translator switch is ON, and the SCL1 and SDA1 I/O are connected to the SCL2 and SDA2 I/O, respectively, allowing bidirectional data flow between ports. When EN is low, the translator switch is off, and a high-impedance state exists between ports.

In addition to voltage translation, the TCA39306-Q1 can be used to isolate a higher speed bus from a lower speed bus by controlling the EN pin to disconnect the slower bus during fast-mode communication.

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Type Title Date
* Data sheet TCA39306-Q1 Dual Bidirectional I2C Bus and SMBus Voltage-Level Translator datasheet 16 Feb 2012
Functional safety information TCA39306-Q1 Functional Safety, FIT Rate, Failure Mode Distribution, and Pin FMA 31 Mar 2021

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