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.