SmartUSBHub Pro 7CH USB2.0 Technical Specifications¶
Document item |
Details |
|---|---|
Applicable product |
SmartUSBHub Pro 7CH USB2.0 |
Order codes |
|
Document version |
v1.0 |
Release date |
2026-07-23 |
1 Product Overview¶
SmartUSBHub Pro 7CH USB2.0 is a seven-port programmable USB 2.0 High-Speed hub. It independently controls VBUS and USB 2.0 D+ / D- on every downstream port for simulated hot-plugging, power cycling, enumeration-order control and fault recovery. The ADV variant also measures VBUS voltage and output current on every channel.
1.1 Model Differences¶
Feature |
|
|
|---|---|---|
Independent VBUS control on seven ports |
Yes |
Yes |
Independent D+ / D- control on seven ports |
Yes |
Yes |
Overcurrent-status monitoring |
Yes |
Yes |
Per-channel voltage/current measurement |
No |
Yes |
Measurement streaming |
No |
Up to 100 Hz |
1.2 Key Features¶
Seven USB-A downstream ports with independent VBUS and D+ / D- control.
USB 2.0 High-Speed link rate up to 480 Mbps; compatible with Full-Speed, Low-Speed and USB 1.1 devices.
Separate USB-C DATA and CMD interfaces isolate the data path from the control path.
USB BC 1.2 CDP support with up to 1.5 A charging current per port; QC, USB PD and other fast-charging protocols are not supported.
Approximately 2.1 A overcurrent-protection threshold and per-channel overcurrent-status monitoring.
Per-channel voltage/current measurement on the ADV variant.
Normal mode, interlock mode, default power and data-line states, restoration after power loss and configurable device address.
2 System Architecture¶
2.1 System Block Diagram¶
The DATA port carries hub traffic for all seven downstream ports. The CMD port enumerates as a USB CDC serial interface and receives control commands. The external DC input supplies the downstream ports through two 5 V power rails.
2.2 Interfaces and Indicators¶
Interface or component |
Quantity |
Function |
|---|---|---|
USB-C DATA |
1 |
Connects to the USB host and carries downstream-device data |
USB-C CMD |
1 |
Connects to the control host and provides the USB CDC command interface |
DC IN |
1 |
DC5525, center-positive; accepts a protected DC supply |
USB-A downstream ports |
7 |
Connect controlled USB devices |
Status indicator |
1 |
Indicates device operating state |
Channel indicators |
7 |
Indicate the VBUS state of the corresponding channels |
3 Functional Specifications¶
3.1 USB Data Path¶
Parameter |
Specification |
|---|---|
USB standard |
USB 2.0 High-Speed |
Maximum link rate |
480 Mbps |
Compatible speeds |
Full-Speed 12 Mbps, Low-Speed 1.5 Mbps, USB 1.1 |
Upstream data port |
1 × USB-C |
Downstream ports |
7 × USB-A |
Hub mode |
MTT / STT supported |
3.2 Channel Control¶
Parameter |
Specification |
|---|---|
Channel numbers |
CH1–CH7 |
VBUS control |
Independent on every downstream port |
D+ / D- control |
Independent on every downstream port |
Power/data relationship |
USB data can be disconnected while VBUS remains powered |
Control methods |
Single-channel, batch, normal and interlock control; only one channel can be enabled at a time in interlock mode |
Default state and restoration |
Configurable default power state, default data-line state and restoration after power loss |
Local channel buttons |
None |
3.3 Charging and Overcurrent Protection¶
Parameter |
Specification |
|---|---|
Charging protocol |
USB BC 1.2 CDP |
BC 1.2 charging current |
Up to 1.5 A per port |
Per-port protection threshold |
Approximately 2.1 A |
Maximum total output current |
10 A shared by all seven ports |
Overcurrent status |
Readable per channel |
Other fast-charging protocols |
QC, USB PD and other fast-charging protocols are not supported |
3.4 Voltage and Current Measurement (ADV Variant)¶
Parameter |
Range |
Resolution |
Accuracy |
|---|---|---|---|
VBUS voltage |
0–5.5 V per channel |
8 mV |
±32.5 mV at 5 V and 25 °C |
Output current |
0–2.7 A per channel |
1 mA |
±(1.25% × reading + 2.5 mA) at 25 °C |
Measurement stream |
- |
Up to 100 Hz |
Depends on host and software configuration |
4 Electrical Specifications¶
Warning: use only the specified DC supply
The normal input range is 9–20 V DC. Use a qualified 19–20 V / 5 A supply with current limiting and short-circuit protection. The 24.5 V absolute maximum is not an allowed operating voltage.
4.1 Absolute Maximum Ratings¶
Exceeding these limits may permanently damage the device. Do not operate continuously near an absolute maximum rating.
Parameter |
Minimum |
Maximum |
Unit |
Notes |
|---|---|---|---|---|
DC input voltage |
0 |
24.5 |
V |
Absolute maximum, not an operating rating |
Downstream-port VBUS |
0 |
5.5 |
V |
USB-A downstream ports |
USB D+ / D- signal voltage |
-0.3 |
5.3 |
V |
USB signal pins |
4.2 Recommended Operating Conditions¶
Parameter |
Condition |
Minimum |
Typical |
Maximum |
Unit |
|---|---|---|---|---|---|
DC input voltage |
External DC input |
9 |
19–20 |
20 |
V |
Recommended power adapter |
Current-limited and short-circuit protected |
- |
20 V / 5 A |
- |
- |
5 V output voltage |
No load |
4.97 |
5.11 |
5.25 |
V |
Port VBUS |
Typical 1.5 A load |
4.87 |
5.00 |
5.25 |
V |
Maximum total output current |
All seven ports combined |
- |
- |
10 |
A |
Operating ambient temperature |
Non-condensing |
0 |
25 |
50 |
°C |
Relative humidity |
Non-condensing |
5 |
- |
95 |
%RH |
Altitude |
Indoor use |
- |
- |
2000 |
m |
Important: also account for the total device output current
The approximately 2.1 A per-port threshold is a protection limit; it does not mean all seven ports can continuously supply that current. Combined output current must not exceed 10 A. Seven ports each drawing the USB BC 1.2 maximum of 1.5 A would require 10.5 A, which exceeds the device limit.
5 Protection and Safety Limits¶
Item |
Specification |
|---|---|
DC input |
Input fuse and overvoltage protection |
Per-port current limit |
Approximately 2.1 A |
Short-circuit and overtemperature protection |
Supported; remove the faulty load and allow the unit to cool before recovery |
Overcurrent-status signal |
Monitored per channel |
USB-signal ESD |
Board-level ESD protection; certification level is subject to the formal test report |
Fast-charging protocols |
QC, USB PD and other fast-charging negotiation are not supported |
Combined output current across all seven ports must not exceed 10 A.
Maintain ventilation during prolonged operation near the maximum total output current. Do not cover the device or place it near flammable materials.
Turning off VBUS or D+ / D- is equivalent to unplugging a device. Stop file writes, firmware updates and other non-interruptible operations first.
This product is intended for USB automation testing and device control. Do not use it as the sole protective device in medical, life-safety, vehicle-safety or other high-safety-level systems.
6 Mechanical and Environmental Specifications¶
Parameter |
Specification |
|---|---|
Dimensions |
84 mm × 56.8 mm × 28 mm |
Device weight |
Approximately 142 g |
Enclosure material |
Aluminum alloy |
Mounting |
Desktop placement; custom brackets can be used |
Operating temperature |
0–50 °C, non-condensing |
Storage temperature |
-10–85 °C, non-condensing |
Relative humidity |
5%–95% RH, non-condensing |
Maximum operating altitude |
2000 m |
Allow room for cable bend radius, connector access and ventilation; do not design an installation only around the product envelope dimensions.