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ISOUSB211DPR Datasheet(PDF) 26 Page - Texas Instruments

Part # ISOUSB211DPR
Description  ISOUSB211 High/Full/Low Speed Isolated USB Repeater
PDF  44 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

ISOUSB211DPR Datasheet(HTML) 26 Page - Texas Instruments

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background image
LDO
1
2
4
3
5
6
7
8
26
25
24
9
IN
GND
OUT
V3P3V1
VBUS1
VCC1
UD-
UD+
GND1
V1P8V1
28
Host/Hub
MCU
DGND
0 V
Digital
Ground
ISO
Ground
ISO
DC-DC
VCC
D2
D1
GND
CLK
Galvanic
Isolation Barrier
ISOUSB211
EN
3.3 VLV
3.3 VLV (local supply)
Downstream
Port
Connector
DM
DP
VCC
VBUS
GND
D-
D+
27
23
10
100 nF
0.1 µF
1 µF
1 µF
1 µF
EQ10
NC
GND1
EQ11
V2OK
V1P8V1
CDPENZ1
11
12
13
14
3.3 VLV
V3P3V2
VBUS2
VCC2
DD-
DD+
GND2
V1P8V2
EQ20
NC
GND2
EQ21
V1OK
V1P8V2
CDPENZ2
0.1 µF
20
18
17
16
15
3.3VLV
3.3 VLV
VBUS (5.0 V)
1.8 V
22
21
19
3.3 V
LDO/
DC-DC
Ferrite
Bead
3.3 µF
120 µF
10 nF
0.1 µF
2 µF
10 nF 0.1 µF
2 µF
10 nF
0.1 µF
2 µF
10 nF 0.1 µF 2 µF
Figure 10-1. Isolated Host or Hub with ISOUSB211
10.1.2 Isolated Peripheral - Self-Powered
Figure 10-2 shows an application for isolating a self-powered peripheral using ISOUSB211. In this example, on
the microntroller side, V3P3V2 and VBUS2 are together connected to an external 3.3-V supply. The V1P8V2 supply
is generated using the internal 1.8-V LDO by providing 3.3-V supply to VCC1. On the connector side, the VBUS
from the USB connector is connected to VBUS1 and the V3P3V1 supply is generated using the internal 3.3-V
LDO. VCC1 and V1P8V1 are together connected to an external 1.8-V supply derived from VBUS. Please refer to
Thermal Considerations for options on optimizing power dissipation inside ISOUSB211 as required.
Decoupling capacitors are placed next to ISOUSB211 according to the recommendations provided in the Power
Supply Recommendations section. Note that the USB standard requires that, for a peripheral, the total capacitor
value on VBUS must be less than 10-μF. However, a total of at least 5-µF capacitance is recommended on
VBUS. A 100-nF capacitor is recommended close to the VBUS pin to handle tranisent currents.
ISOUSB211
SLLSFC5B – NOVEMBER 2021 – REVISED SEPTEMBER 2022
www.ti.com
26
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Copyright © 2022 Texas Instruments Incorporated
Product Folder Links: ISOUSB211



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