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LSF0102DCTR датащи(PDF) 23 Page - Texas Instruments

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номер детали LSF0102DCTR
подробное описание детали  LSF010x 1/2/8 Channel Auto-Bidirectional Multi-Voltage Level Translator for Open- Drain and Push-Pull Applications
PDF  53 Pages
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производитель  TI [Texas Instruments]
домашняя страница  http://www.ti.com
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LSF0102DCTR датащи(HTML) 23 Page - Texas Instruments

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10 Power Supply Recommendations
There are no power sequence requirements for the LSF family. Table 10-1 provides recommended operating
voltages for all supply and input pins.
Table 10-1. Recommended Operating Voltages
PARAMETER
MIN
TYP
MAX
UNIT
Vref_A(1)
reference voltage (A)
0.95
5.0
V
Vref_B
reference voltage (B)
Vref_A + 0.8
5.0
V
VI(EN)
input voltage on EN pin
Vref_A + 0.8
5.0
V
Vpu
pull-up supply voltage
0
Vref_B
V
(1)
Vref_A is required to be the lowest voltage level across all inputs and outputs.
11 Layout
11.1 Layout Guidelines
Because the LSF family is a switch-type level translator, the signal integrity is highly related with a pull-up
resistor and PCB capacitance condition.
• Short signal trace as possible to reduce capacitance and minimize stub from pull-up resistor.
• Place LSF close to high voltage side.
• Select the appropriate pull-up resistor that applies to translation levels and driving capability of transmitter.
11.2 Layout Example
GND
Vref_A
EN
Vref_B
A1
A2
B1
B2
Short Signal Trace as possible
Minimize Stub as possible
1
2
3
4
5
6
7
8
Figure 11-1. Short Trace Layout
Device PCB
TP1
SD Controller
(1.8 V IO)
TP2
LSF0108
SDIO level translator
SDIO Connnector
(3.3 V IO)
Figure 11-2. Device Placement
www.ti.com
LSF0108
SDLS966L – DECEMBER 2013 – REVISED DECEMBER 2022
Copyright © 2022 Texas Instruments Incorporated
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23
Product Folder Links: LSF0108



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