LSF0204-Q1 - 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 translatorthat operate from 0.8 V to 4.5 V (Vref_A) and 1.8 V to 5.5 V (Vref_B). This range allows forbidirectional voltage translations between 0.8 V and 5.5 V without the need for a directionpin.

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

The supply voltage (V_PUn) for each channel may be individuallyset 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 switchis off, and a high-impedance state exists between ports. The EN input circuit is designed to besupplied by Vref_A. EN must be LOW to ensure the high-impedance state during power-up orpower-down.

• AEC-Q100 Qualified for Automotive Applications
  • Temperature Grade 1: –40°C ≤ T_A ≤ 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 I_off, 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 R_on Enables Better Signal Integrity
• Flow-Through Pinout for Easy PCB Trace Routing
• Latch-Up Performance Exceeds 100 mA Per JESD17

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