Diodes Incorporated
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LSF0102

2-Bits Bidirectional Level Translator, Open-Drain and Push-Pull Applications

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Description

The LSF0102 is a 2-channel bidirectional multi-voltage level translator for open-drain and push-pull applications. This device is a universal level translator that A port operates from 0.65V to 4.5V (Vref_A) and B port 1.8V to 5.5V (Vref_B). This range allows for bidirectional voltage translations between 0.65V and 5.0V. Be aware that Vref_B is recommended to be at 1.0V higher than Vref_A for best signal integrity.

The EN pin is used to activate the device. When EN is HIGH, the translator switch is on. Otherwise, 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_B via an external Rpu (pullup resistor, typ. 200kΩ) and The EN must be LOW during power-up or power-down to avoid miss operation.

Be aware that external Rpu (pull-up resistor) is required on each signal in both A and B ports for push-pull application because a pull-high state can avoid miss operation during power-up or power-down. As same as open-drain application, the smaller Rpu results in the larger driving current. For bidirectional signal flows, there is no need for a direction pin to minimize system effort. This device supports 5V tolerant I/O pins in a variety of applications which require different voltage translation levels.

Feature(s)

  • External Rpu (pull-up resistor) sets driving current in both push-pull and open-drain applications
  • Maximum data rate is dominated by the system capacitance and
  • pull-up resistors
    • ≤ 100MHz; CL = 15pF, 30pF, RPU <= 300Ω
    • ≤ 50MHz; CL = 50pF, RPU <= 300Ω
  • Bidirectional voltage level translation between:
    • 65V and 1.5V, 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
    • 4000V HBM (A114)
    • 1500V CDM (C101)
  • Latch-up 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) For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/104/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/

Application(s)

  • GPIO, MDIO, SDIO, SVID, UART
  • PMBus, SMBus, I2C, and other interfaces
  • Telecom infrastructure
  • Industrial
  • High performance computing
  • Wide array of products such as:
    • PCs, networking, notebooks
    • Smart phones
    • Tablet

Product Specifications

Product Parameters

Compliance (Only Automotive supports PPAP) Standard
Translation From (V) 0.65 to 4.5
Translation To (V) 1.8 to 5.5
Max Signal Rate 100MHz
Bits Needed 2
Auto Direction Sensing? No
Shift Bi-Directional
Prop Delay (ns) N/A
Ambient or Junction Temperature (°C) -40 to 85

Technical Documents

Recommended Soldering Techniques

TN1.pdf

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

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