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LSF0102 Datasheet(PDF) 17 Page - Texas Instruments

No. de pieza LSF0102
Descripción Electrónicos  LSF0102 2 Channel Auto-Bidirectional Multi-Voltage Level Translator for Open-Drain and Push-Pull Applications
PDF  42 Pages
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Fabricante Electrónico  TI2 [Texas Instruments]
Página de inicio  https://www.ti.com
Logo TI2 - Texas Instruments

LSF0102 Datasheet(HTML) 17 Page - Texas Instruments

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Vref_A
VCCB
EN
200 k
A1
A2
B1
B2
GND
LSF0108-Q1
Vref_B
3.3 V
Device
3.3 V
RB2
RB1
0.1 mF
RA1
RA2
R1
R2
1.8 V –
V
1.8 V –
V
Device
5
5
LSF010x
Figure 8-5. Single Supply Translation with 3.3V Supply
The steps to select the resistor values for R1 and R2 are as follows:
1. Select a value for R1. Typically, 1MΩ is used to reduce current consumption.
2. Plug in values for your system into the following equation. Note that Vref_A is the lowest voltage in the
system. VCCB is the primary supply and R1 is the selected value from step 1.
R2 =  200 103 × R1 × VREFA
200 103 + R1 VCCB − VREFA − 0.85 × R1 
(4)
The single supply used must be at least 0.8V larger than the lowest desired translation voltage. The voltage at
Vref_A must be selected as the lowest voltage to be used in the system. The LSF evaluation module (LSF-EVM)
contains unpopulated pads to place R1 and R2 for single supply operation testing. For an example single supply
translation schematic and details, see the Single Supply Translation with the LSF Family video.
www.ti.com
LSF0102
SDLS972B – APRIL 2023 – REVISED APRIL 2024
Copyright © 2024 Texas Instruments Incorporated
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Product Folder Links: LSF0102



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