LSF0204-Q1 Automotive 4-Bit Bidirectional Multi-Voltage Level Translator for Open-Drain or Push- Pull Interface |

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Automotive 4-Bit Bidirectional Multi-Voltage Level Translator for Open-Drain or Push- Pull Interface



The LSF0204-Q1 is automotive qualified four channel auto bidirectional voltage translator that operate from 0.8 V to 4.5 V (Vref_A) and 1.8 V to 5.5 V (Vref_B). This range allows for bidirectional voltage translations between 0.8 V and 5.5 V without the need for a direction pin.

When the An or Bn port is LOW, the switch is in the ON-state and a low resistance connection exists between the An and Bn ports. The low Ron of the switch allows connections to be made with minimal propagation delay and minimal signal distortion. The voltage on the A or B side will be limited to Vref_A and can be pulled up to any level between Vref_A and 5.5 V

The supply voltage (VPUn) for each channel may be individually set up with a pull up resistor. For example, CH1 may be used in up-translation mode (1.2 V ↔ 3.3 V) and CH2 in down-translation mode (2.5 V ↔ 1.8 V).

When EN is HIGH, the translator switch is on, and the An I/O is connected to the Bn 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. The EN input circuit is designed to be supplied by Vref_A. EN must be LOW to ensure the high-impedance state during power-up or power-down.


  • AEC-Q100 Qualified for Automotive Applications
    • Temperature Grade 1: –40°C ≤ TA ≤ 125°C
    • Device HBM ESD Classification Level 2
    • CDM ESD Classification Level C6
  • Provides Auto-Bidirectional Voltage Translation Without Direction Pin
  • Supports Open drain or Push-pull Applications such as I2C, I2S, SPI, UART, JTAG, MDIO, SDIO, and GPIO
  • Supports up to 100-MHz Up Translation and Greater Than 100-MHz Down Translation
    at ≤ 30-pF Capacitor Load and up to 40-MHz Up/Down Translation at 50-pF Capacitor Load
  • Supports Ioff, Partial Power Down Mode (See Feature Description)
  • Allows Bidirectional Voltage Level Translation Between
    • 0.95 V ↔ 1.8, 2.5, 3.3, 5.5 V
    • 1.2 V ↔ 1.8, 2.5, 3.3, 5.5 V
    • 1.8 V ↔ 2.5, 3.3, 5.5 V
    • 2.5 V ↔ 3.3, 5.5 V
    • 3.3 V ↔ 5.5 V
  • 5-V Tolerance on I/O Ports
  • Low Ron Enables Better Signal Integrity
  • Flow-Through Pinout for Easy PCB Trace Routing
  • Latch-Up Performance Exceeds 100 mA Per JESD17

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Part number Order Technology Family Application Bits (#) High input voltage (Min) (Vih) High input voltage (Max) (Vih) Output voltage (Max) (V) Output voltage (Min) (V) IOH (Max) (mA) IOL (Max) (mA) Package Group Rating
LSF0204-Q1 Order now LSF     I2C
2     0.9     5.5     5.5     0.9     0     0     TSSOP | 14     Automotive    
LSF0102-Q1 Order now LSF     I2C     2     0.9     5.5     5.5     0.9     0     0     VSSOP | 8     Automotive    
LSF0108-Q1 Order now LSF       8     0.95     5     5     0.95     0     0     TSSOP | 20     Automotive    
TXB0104-Q1 Order now TXB     UART
4     0.78     5.5     5.5     1.2     -0.02     0.02     TSSOP | 14
UQFN | 12
VQFN | 14    
TXS0104E-Q1 Order now TXS     SPIO     4     1.45     5.5     5.5     1.65     0     0     TSSOP | 14     Automotive