1 Features
• 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
Section 7.3)
• 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

2 Applications
• I2S, JTAG, SPI, SDIO, UART, I2C, MDIO, PMBus,
SMBus and other interfaces
• Infotainment head unit
• Graphical cluster
• ADAS fusion
• ADAS front camera
• HEV battery management system

3 Description
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 highimpedance
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.