7.3 Feature Description

7.3.1 Auto-Bidirectional Voltage Translation Without DIR Pin Terminal

The LSF0204-Q1 device is an auto bidirectional voltage level translator that operates from 0.95 V to 4.5 V on

Vref_A and 1.8 V to 5.5 V on Vref_B. This allows bidirectional voltage translation between 0.95 V and 5.5 V

without the need for a direction pin in open-drain or push-pull applications.

7.3.2 Support Multiple High Speed Translation Interfaces

The LSF0204-Q1 device is able to perform voltage translation for open-drain interfaces such as I2C, MDIO,

SMBUS, and PMBUS or push-pull interfaces such as I2S, SPI, UART, SDIO, and GPIO. The LSF0204-Q1

device supports level translation applications with transmission speeds greater than 100 MHz using a 200-Ω

pullup resistor with a 15-pF capacitive load. See the Down Translation with the LSF family and Up Translation

with the LSF family videos.

7.3.3 5-V Tolerance on IO Port and 125°C Support

The LSF0204-Q1, provides up to 5-V over-voltage tolerance on each of its IO channels. The device operating

ambient temperature from –40°C to 125°C is critical in supporting automotive applications.

7.3.4 Channel Specific Translation

The LSF0204-Q1 can work as multi-voltage level translator using specific pullup voltage (Vpu) on each IO

channel. Watch the Multi-Voltage Translation with the LSF Family video.

7.3.5 Ioff, Partial Power Down Mode

When Vref_A or Vref_B = 0, all the data IO pins are in high impedance.

EN logic circuit is referenced to Vref_A supply. No power sequence is required to enable and operate LSF0204-

Q1.

7.4 Device Functional Modes

Table 7-1 lists the device functional modes of the LSF0204-Q1 device.

Table 7-1. Function Table

INPUT EN(1) TERMINAL

FUNCTION

H

An = Bn

L

Hi-Z

(1)

EN is controlled by Vref_A logic levels.

LSF0204-Q1

SLVSEM4B – JUNE 2018 – REVISED APRIL 2021

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