Questions tagged [usb-hub]

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How can one have a canonically correct USB 2.0 Bus Powered Hub (100ma limit per port) with Type-C Downstream Facing Ports

Through research I am aware that using the CC lines one can advertise "Default" (500mA for 2.0 and 900mA For 3.0+), 1.5A and 3A before getting into PD territory, but none of these include ...
Befitting Display Name's user avatar
2 votes
1 answer
109 views

Help me identify the blown part, SMD, 5-pin "5AH10"

Pic 1 (the ic): Pic 2 (the ic): Pic 3 (the ic): Pic 4 (the hub board): Pic 5 (back side of the hub ic right above the big ribbon cable female connector): This IC is found in the USB hub of the HP ...
AhmedH2O's user avatar
  • 361
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0 answers
48 views

Poor signal through USB 2.0 Hub IC

I’m using an FE1.1S, using only 2 ports which are connected to a Ublox GPS F9P and another to an STM32. Connecting it to a computer, the hub and com ports show up just fine and I can connect to them. ...
Sean's user avatar
  • 59
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0 answers
64 views

Odd USB Hub + USB to UART Behavior

I've condensensed several USB connections into 1 leveraging the FE1.1s. I built an eval board that tests this setup prior to implementing into the bigger project (see attached schematic). The FE1.1s ...
Sean's user avatar
  • 59
0 votes
1 answer
155 views

USB HUB for OTG

I have designed a custom board with Processor which is having a dedicated USB 2.0 OTG port. I want to convert it to 4 USB OTG ports. so I was thinking to use the USB 2.0 HUB with OTG support for 4 ...
Brt's user avatar
  • 65
1 vote
1 answer
78 views

Computer interface with USB devices

I'm making a computer peripheral that will be connected via a USB. The main brain is an STM32 ARM MCU, it has USB support natively. It has multiple sub-peripherals inside and it uses I2C and SPI to ...
Abd Alhaleem Bakkor's user avatar
0 votes
2 answers
530 views

USB 3 hub is fried! why? room for improvement?

this hub was for a friend of mine, he asked me if I could repair it for him, but when I opened the case, I was shocked! behold the fried chip and PCB! he said he want the chip to be replaced, because ...
T R Y's user avatar
  • 79
0 votes
2 answers
143 views

Making a USB HUB with power control

I'm trying to design my USB-HUB, because not so many commercial ones offer the solutions I need; My intentions would be to have a per-port power control, so I can switch on/off devices as I please (...
Kralik's user avatar
  • 47
0 votes
0 answers
65 views

4 Port USB 2.0 Switch

I am currently working on a device that is able to switch four USB devices back and forth between two PCs (see picture). For the task I wanted to use a "TUSB4041" as a USB hub and the "...
Paul Holz's user avatar
0 votes
1 answer
69 views

How to connect USB-C port to USB hub?

Sorry if this is a dumb question, I'm very new to all of this. I'm trying to connect the upstream port on a 4 port USB hub to a USB type C plug and I'm somewhat confused on how to wire the TX and RX ...
Cole Morrel's user avatar
0 votes
0 answers
112 views

FE1.1s USB Hub and GL827L SD Card Reader

I'm trying to make a 4-port USB hub using the FE1.1s IC, one of the outputs of which is the GL827L IC as an SD card reader. when i connect my usb hub to computer, my usb hub is detected but sd card ...
MaretArt's user avatar
0 votes
1 answer
300 views

Minimal circuit for the FE1.1 USB HUB IC

I have a board with 4 MCU in it, since i dont have the space to have 4 usb ports on the board i opted to include a usb hub circuit. I have read that the FE1.1 is a cheap IC and requires very few ...
DrakeJest's user avatar
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1 vote
0 answers
108 views

How to get USB 3.x power but with data limited to USB 2.0 HS?

I am designing a device with a few interesting requirements. Due to power requirements, we need to draw 900mA, but due to isolation requirements, we're limited to the 480Mbps rate for our primary ...
mbengineer's user avatar
0 votes
1 answer
63 views

Using only USB Type C signals without USB2.0 Signals

Need your help regarding SC200E USB. As per my understanding SC200E supports both USB2.0 and USB Type C. My question is can we use it separately. I mean we need to connect the USB2.0 signals of SC200E ...
Hari's user avatar
  • 2,000
1 vote
0 answers
64 views

Use of RREF pin on USB hub IC

I have a problem concerning the realization of a USB 3.0 hub using the integrated circuit UPD720201K8-711-BAC-A. This concerns pin 33 called RREF. In the documentation I can't find any explanation on ...
Andjy.dev's user avatar
2 votes
2 answers
955 views

Is there an advantage to using 12V vs 5V for a powered USB hub design?

If you were to design a self-powered USB hub, is there any sort of advantage to a 12V design instead of 5V? The logic being that if the source voltage were to drop a few volts (maybe 2-3V), a 12V ...
BobaJFET's user avatar
  • 740
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1 answer
77 views

Terminating resistor for SL2.1A controller?

I'm currently making PCB with an integrated USB hub that will use an SL2.1A chip and I'm wondering if I should use any kind of terminating resistors on data lines? I read the datasheet and couldn't ...
Orsn's user avatar
  • 1
0 votes
1 answer
122 views

USB Hub Self-Powered using USB Type C

I'm designing a board based on a USB Hub HS 2.0 that has five permanent attached ports, two of them with a high current consumption (180 mA typical, 250mA max. per device). I would like the board to ...
fapps's user avatar
  • 101
0 votes
2 answers
273 views

USB multiplexer with common bus

Okay this is indeed a dumb question but I would like to know if this is feasible. I want to create a usb mux that can connect a common USB port to 4 ports. There is an IC TS3USB221 that does the same ...
Ijaz Ahmad's user avatar
0 votes
2 answers
217 views

Extend cable of USB hub [closed]

I bought a device recently which is a USB hub. It has multiple HDMI ports, multiple USB 2.0 and USB 3.0 ports, an Ethernet port, an SD card slot, etc. It is a beast. It connects to my laptop via a USB-...
quantum231's user avatar
  • 11.8k
1 vote
0 answers
228 views

Understanding the orientation of USB 3.0 superspeed TX/RX lines and when to flip the lines

I'm working on a device that will have an onboard storage device with a USB interface, as well as two USB 3.0 type-A connectors (a plug and a socket), along with a USB hub ic. I'm using the Microchip ...
cEEa's user avatar
  • 473
2 votes
1 answer
172 views

Using battery bank as a continuous battery backup / supply for USB devices

I have a Raspberry Pi and mega-4 powered USB hub working well, with one USB-C power input each. The battery bank has 2 USB ports, one for each device. The charger (bottom left) is a standard buck ...
brianlmerritt's user avatar
0 votes
1 answer
48 views

USB 3 Type-A connector and hub controller signal name convention

For a USB30 hub that I'm designing with a TUSB8020B (one upstream port and two downstream ports) I've chosen to use a Type-A connector. A first question is what model should I use, a plug or a ...
FIRE FOX's user avatar
1 vote
0 answers
121 views

Incorporating USB switch into hub

I designed a powered USB hub that allows me to connect multiple devices to a FPGA development board through a micro USB port. The hub and the FPGA sit inside an enclosure along with some other ...
OnCor's user avatar
  • 11
2 votes
2 answers
525 views

What determines the maximum number of devices that can be connected through a single port of a USB 3.0 switch?

I need to connect about 10 different electronic devices (lasers, cameras, motorized stages etc.) to two PCs, such that you can choose to control the whole setup from either one of those PCs. My first ...
srhslvmn's user avatar
  • 131
0 votes
1 answer
99 views

Why does the USB specification have 3 different system power configurations?

I was reading about USB specifications/configurations from this PDF. On page 5 it says that USB power configuration can be achieved (can be configured) with 3 different power options. I have utilized ...
Christianidis Vasilis's user avatar
0 votes
0 answers
52 views

How is the decision to own a USB hub device and host made?

I'm doing research. I am using a TUSB2046 USB hub. I just started researching this topic. How does the TUSB2046 or other hubs decide the host and the device when the device connection is made with the ...
dmrmuhammet's user avatar
0 votes
0 answers
1k views

FE1.1s USB Hub "device not recognized"

I am trying to create a 4-port USB hub using a FE1.1s IC. When I plug the USB hub into my computer. I got the error "device not recognized" from my laptop. I have been trying to troubleshoot ...
Ritz123's user avatar
  • 11
1 vote
1 answer
50 views

USB isolated HUB : USB Data In series component identification

What is this IC/component (L17) that is in series with the USB 2.0 D+, D- data lines? The PCB is a Isolated industrial graded USB hub. (Only its upstream is isolated). Each downstream port has a ...
Christianidis Vasilis's user avatar
9 votes
2 answers
2k views

USB hub: What's the use of the 0.1 μF capacitors in series with the RX connections?

Are the 0.1 μF capacitors in the schematic I found on the internet for the USB hub USB5537B connected to all the TXs required? What is their purpose? Normally I know that series capacitors are used to ...
George P.'s user avatar
  • 119
0 votes
1 answer
52 views

Are HSIC USB hubs upstream recognized in windows device manager or they need additional drivers/software?

I try to utilize a HSIC USB hub (USB3503 USB hub), but it is not recognized on windows when I connect it to the PC's USB port. And I start to wonder, if its HSIC upstream can be recognized by windows ...
Christianidis Vasilis's user avatar
1 vote
1 answer
833 views

FE1.1s Based USB hub - USB device descriptor failed

I designed a PCB which has a FE1.1s USB Hub controller. This project must work as a micro-USB HUB. The problem is that when I connect my device to computer, my board's LEDs turn on for a moment and ...
Hamidreza Hassanvand's user avatar
0 votes
1 answer
75 views

USB3503 Power Supply hookup

I am designing a USB hub using USB3503 IC. I am trying to configure it without the need of programing its internal registers. Just by using its default settings. I want my windows 10 to recognize the ...
Christianidis Vasilis's user avatar
0 votes
1 answer
314 views

TUSB2036 hub IC: only mouse and keyboard work at downstream ports

I try to utilize the TUSB2036 USB hub IC. my hookup/connection is shown below: simulate this circuit – Schematic created using CircuitLab On the above setup, if I plug in a mouse or keyboard on ...
Christianidis Vasilis's user avatar
0 votes
0 answers
721 views

USB2514B not working properly

i'm using the USB2514B to create a 1 to 4 usb hub with some other relays. The problem is that when any device is connected, windows shows the "USB Device not recognized" error. When using ...
woogs's user avatar
  • 11
1 vote
1 answer
124 views

Splitting a USB-C for aux power

I'm building a mechanical keyboard and I need more current from my PC than I can get from one usb port. Can buy/make a usb splitter that I can plug into two A ports on my PC and plug into my USB-C MCU?...
AerosolSP's user avatar
3 votes
1 answer
143 views

How do I connect USB Type-C signals to a USB Type-A connector?

I am designing a USB hub circuit by using USB7002. It gives out two USB 3.2 Gen 1 ports with Type-C support. Each of these two ports has two pairs of RX and TX differential pairs (SS-RXA, SS-RXB, SS-...
hkBattousai's user avatar
0 votes
0 answers
121 views

Using TUSB2036 for two USB 2.0 Ports

I want to use TUSB2036, where the upstream is a USB2.0 port (USB2_DP, USB2_DN) comes from Intel CPU. For my design I need two USB2.0 downstream ports for WWAN and WIFI M.2 Application. Can this device ...
Firas Abd El Gani's user avatar
1 vote
0 answers
89 views

Using USB5742 USB 3.2 Gen 1 HFC IC with pre-configured firmware

Due to Chip Shortage problem, I have been looking for USB 2.0 Hub Controller for long time now. I need only two USB 2.0 Downstream (PHY) ports for my design. I contacted MicroChip and they have the ...
Firas Abd El Gani's user avatar
2 votes
1 answer
333 views

USB Power Inside of Freezer / Fridge [closed]

Background of the project: I am doing my own DIY Keezer (keg freezer) which basically turns a chest freezer into a fridge that will hold kegs with the assistance of a temperature controller. The ...
MrJustin's user avatar
  • 123
0 votes
1 answer
114 views

Crafting a Superspeed USB Type-C port out of two ports on a USB 3 hub?

I am designing a “simple” USB-C Hub, that will have two downstream facing USB-C ports (and nothing else), both supporting USB 3 speeds. I have solved some of the challenges already- VCONN, power ...
Harry Brooke's user avatar
1 vote
2 answers
90 views

Replacing USB251xB/xBI USB 2.0 HUB Controller

Due to Chip Shortage problem, I need to replace Microchip USB251xB/xBi USB 2.0 Hi-Speed Hub Controller with USB3503T-I/ML I'm using only two USB 2.0 ports. the chip will be used in an Industrial ...
Firas Abd El Gani's user avatar
2 votes
3 answers
64 views

VF vs. VFR Suffix: Whats the Difference?

On Digikey, I have found 2 parts that have the same datasheet and same product attributes, but one is $2 cheaper and has VFR at the end of its name instead of VF. Here are the products and datasheets: ...
ShortsKing's user avatar
1 vote
1 answer
127 views

Does USB have some kind of current cutter that cuts the current for safety? [closed]

I accidentally got 24V into the GND on my Arduino and then the USB shut off - but not all of them. When I restarted my computer, then all USB shut off and they are not giving out any current. Notice ...
euraad's user avatar
  • 1,085
-1 votes
2 answers
69 views

Wiring to connect three USB 3A receptacles (to connect my laptop to an active usb hub from one of two locations)

I'm a total noob in electronics ) I am trying to solder three USB 3A receptacles in a way that would allow me to connect my laptop to my active USB hub from either of two locations (there will be only ...
Artem's user avatar
  • 103
4 votes
2 answers
804 views

Do I need to switch power and ground on USB 3.0?

I am an electronics novice, so before I start cutting my cable, I want to ask people who know more than me. I have a project that has a USB 3.0 hub inside, and I want a single switch to handle the DC ...
jsureke's user avatar
  • 43
1 vote
0 answers
344 views

Implementing a USB hub with MITM (packet interception) capabilities

I'm working on a project in which I essentially need to implement a USB hub that also contains an embedded Linux SoC that would man-in-the-middle the connection between an upstream USB host and a ...
console.slog's user avatar
2 votes
0 answers
118 views

Is this USB Hub 3.0+2.0 hybrid safe to use?

So I just bought a USB 3.0+2.0 hub hybrid. When I check the PCB, the pin out is new to me (see photo). From host, two of the USB 2.0 data lines (red lines) went straight to the hub IC, then from the ...
Milk Boy's user avatar
0 votes
1 answer
209 views

USB hub IC overcurrent Pin: active LOW or active HIGH?

I am using USB2517 - USB 2.0 Hi-Speed 7-Port Hub Controller IC to make a USB 2.0 hub. What I do not understand (or its missing from the IC's datasheet), is Pins OCS[7:1]_N, which are "Input from ...
Christianidis Vasilis's user avatar
-1 votes
2 answers
804 views

Use USB D-/D+ only on USB 3.0 IC

I want to design a USB hub 3.0 with only D- and D+ data pins (So I wont implement the USB 3 functionality). I chose CYUSB3328 IC for this job. (The reason I do not use a USB 2.0 for this, is because I ...
Christianidis Vasilis's user avatar