7 Detailed Description

7.1 Overview

The LSF0002 can be used in level-translation applications for interfacing devices or systems operating with one

another that operate at different interface voltages. The LSF family is an excellent choice for use in applications

where an open-drain driver is connected to the data I/Os. With appropriate pull-up resistors and layout, LSF

can achieve 100MHz. The LSF family can also be used in applications where a push-pull driver is connected

to the data I/Os. For an overview of device setup and operation, see The Logic Minute training series on

Understanding the LSF Family of Bidirectional, Multi-Voltage Level Translators.

7.2 Functional Block Diagram

SW

VBIAS

6

B1

SW

A1

B2

A2

2

3

5

4

GND

1

7.3 Feature Description

7.3.1 Auto Bidirectional Voltage Translation

The LSF family is an auto bidirectional voltage level translator that is operational from 0.95 to 5.5V. This allows

for bidirectional voltage translation between 0.95V and 5.5V without the need for a direction pin in open-drain or

push-pull applications. The LSF family supports level translation applications with transmission speeds greater

than 100Mbps for open-drain systems using a 30pF capacitance and 250Ω pullup resistor. Both the output

driver of the controller and the peripheral device output can be push-pull or open-drain (pull-up resistors may be

required). In both up and down translation, the B-side is often referred to as the high side and refers to devices

connected to the B ports. The A-side can be referred to as the low side.

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LSF0002

SDLS975 – APRIL 2024

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