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LSF0102 Datasheet(PDF) 12 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
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LSF0102 Datasheet(HTML) 12 Page - Texas Instruments

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8 Application and Implementation
Note
Information in the following applications sections is not part of the TI component specification,
and TI does not warrant its accuracy or completeness. TI’s customers are responsible for
determining suitability of components for their purposes, as well as validating and testing their design
implementation to confirm system functionality.
8.1 Application Information
The LSF devices can perform voltage translation for open-drain or push-pull interfaces. Table 8-1 provides
common interfaces and the corresponding device recommendation from the LSF family which supports the
corresponding bit count.
Table 8-1. Voltage Translator for Common Interfaces
Part Name
Channel Number
Interface
LSF0102
2
GPIO, MDIO, SMBus, PMBus, and I2C
Some important reminders regarding the LSF family of devices are as follows:
• LSF devices are switch-based, not buffer-based (for more information, see the TXB family for buffer-based
devices).
• Specific data rates cannot be calculated by using 1/Tpd.
• VCCB/VCCA are not the same as Vref_B or Vref_A: VCCB refers to the B-side supply voltage supplied to the LSF
device, while Vref_B refers to the voltage at the Vref_B pin (pin 7 of Figure 9-1) on the other side of the 200kΩ
resistor.
8.2 Typical Applications
8.2.1 Open-Drain Interface (I2C, PMBus, SMBus, and GPIO)
Vref_A
Vref_B
2
7
3
4
8 EN
6
5
1
GND
A1
A2
B1
B2
LSF0108
Rpu
200 K
ON
Off
Rpu
Rpu
Rpu
Vref(A) = 1.8 V
Vpu = 3.3 V
GND
GND
3.3 V enable signal
Vcc
MDIO
MDC
SW
SW
Vcc
MDIO
MDC
LSF010x
Figure 8-1. Typical Application Circuit for Open-Drain Translation (MDIO Shown as an Example)
LSF0102
SDLS972B – APRIL 2023 – REVISED APRIL 2024
www.ti.com
12
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Copyright © 2024 Texas Instruments Incorporated
Product Folder Links: LSF0102



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