Overview
The STUSB03EQR, produced by STMicroelectronics, is a single-chip USB transceiver that complies with the physical layer specifications of the Universal Serial Bus (USB) v2.0 standard. This component is designed to provide USB connectivity in mobile systems where the available system supply voltages may not meet USB requirements. It operates down to supply voltages of 1.6V, making it compatible with lower system voltages found in devices such as PDAs, MP3 players, and cell phones.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| VBUS Supply Voltage | 4 | 5.5 | 5.5 | V |
| VIF System I/F Supply Voltage | 1.6 | 3.6 | 3.6 | V |
| Operating Temperature Range | -40 | - | 85 | °C |
| Storage Temperature Range | -65 | - | 150 | °C |
| ESD Protection (D+, D-) | ±14 kV | - | - | - |
| ESD Protection (VBUS) | ±5 kV | - | - | - |
| Package Type | - | - | QFN16 (3mm x 3mm) | - |
Key Features
- Compliant to USB V2.0 for full-speed (12 Mbps) and low-speed (1.5 Mbps) operation.
- Integrated 5V to 3.3V regulator for direct powering from VBUS.
- Internal D+ pull-up resistor for full-speed operation.
- Supports Sharing mode when VBUS is not present, allowing D+/D– lines to be shared with other serial protocols.
- Very low power consumption to meet USB ‘suspend’ current requirements.
- No power supply sequencing requirements.
- Software-controlled re-enumeration.
- Integrated 3.3V output LDO.
- ESD compliant to IEC-61000-4-2 (level 3) on D+, D- lines.
Applications
The STUSB03EQR is suitable for various mobile and portable systems, including:
- PDAs (Personal Digital Assistants)
- MP3 players
- Cell phones
- Other portable devices requiring USB connectivity.
Q & A
- What is the operating temperature range of the STUSB03EQR?
The operating temperature range is from -40°C to 85°C.
- What are the supported USB speeds for the STUSB03EQR?
The component supports both full-speed (12 Mbps) and low-speed (1.5 Mbps) operation.
- Does the STUSB03EQR have built-in ESD protection?
- What is the minimum system supply voltage required for the STUSB03EQR?
The minimum system supply voltage (VIF) is 1.6V.
- Does the STUSB03EQR require external power supply sequencing?
No, it does not require power supply sequencing.
- How does the STUSB03EQR handle suspend mode?
In suspend mode, the internal circuits are turned off to reduce supply current, and the component enters a low power state.
- What is the purpose of the VPU pin on the STUSB03EQR?
The VPU pin provides a 3.3V output for speed selection and can be controlled via the CON input.
- Can the D+/D– lines be shared with other serial protocols?
- What is the package type of the STUSB03EQR?
The component is packaged in a QFN16 (3mm x 3mm) lead-free package.
- Does the STUSB03EQR have an integrated voltage regulator?
