Diodes Incorporated
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4-Bit Bi-Directional Level Translator Open-Drain and Push-Pull Applications

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The LSF0204 is a 4-channel bi-directional multi-voltage level translator for open-drain and push-pull applications. This device is a universal level translator with A port operating from 0.8V to 4.5V (Vref_A) and B port from 1.8V to 5.5V (Vref_B). This range allows for bi-directional voltage translations between 0.8V and 5.0V. Be aware that Vref_B is recommended to be at 1.0V higher than Vref_A for the best signal integrity.

The EN pin is used to activate the device. When EN is HIGH, the translator switch is on. Otherwise, if 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 to avoid misoperation.

Please note that an external Rpu (pullup resistor) is required on port A and B for push-pull and open-drain application because a pull-high state can avoid misoperation during the power sequence. About the Rpu, the smaller value can result in the larger driving current. Overall, the LSF0204 is designed for easy-to-use with auto direction. So, there is no need for a direction pin to minimize system effort. This device supports 5V tolerant I/O pins for compatibility with TTL levels in a variety of applications which require a proper voltage translation.


  • External Rpu (Pullup Resistor) to Set Driving Current in Both
  • Push-Pull and Open-Drain Applications
  • Up & Down Translation
    • ≤ 100MHz; CL = 15pF, 30pF
    • ≤ 50MHz; CL = 50pF
  • Bi-Directional Voltage Level Translation Between:
    • 8V and 1.8V, 2.5V, 3.3V and 5.0V
    • 2V and 1.8V, 2.5V, 3.3V and 5.0V
    • 8V and 2.5V, 3.3V and 5.0V
    • 5V and 3.3V and 5.0V
    • 3V and 5.0V
  • ESD Protection Exceeds JESD 22
    • 2000V HBM (A114)
    • 1000V CDM (C101)
  • Latchup Exceeds 100mA per JESD 17
  • Specified from -40°C to +125°C
  • Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
  • Halogen and Antimony Free. “Green” Device (Note 3)
  • An automotive-compliant part is available under separate datasheet (LSF0204Q)


  • PMBus™, SMBus™, I2C, and other interfaces
  • Telecom infrastructures
  • Industrial
  • High-performance computing
  • Wide array of products such as:
    • PCs, networking, notebooks
    • Smart phones
    • Tablets

Product Specifications

Product Parameters

Compliance (Only Automotive supports PPAP) Standard
Translation From (V) 0.8 to 4.5
Translation To (V) 1.8 to 5.5
Max Signal Rate 100MHz
Bits Needed 4
Auto Direction Sensing? No
Shift Bi-Directional
Prop Delay (ns) 0.9
Ambient or Junction Temperature (°C) -40 to 125

Technical Documents

Application Notes

SPICE/IBIS Model Documents

Recommended Soldering Techniques


Additional Technical Documents are available upon request:
Application information, Evaluation board, and Other technical documents

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