STOTG04EQTR

STOTG04EQTR appears to be a part number for a USB On-The-Go (OTG) transceiver/PHY. The “OTG” in such parts indicates it provides the physical layer and role-switching needed for a USB port to operate as either host or device.
- What it does: handles USB signaling (D+ and D-), VBUS sensing, ID pin logic, and usually some basic power management for an embedded USB OTG interface.
- Typical features: support for full-speed and/or high-speed operation, integrated or external PHY options, 3.3V logic levels, VBUS detection, pull-up/pull-down control, wakeup/power modes, and package options.
- Common use: add USB OTG capability to microcontroller-based systems (phones, cameras, IoT devices, development boards) so a single port can switch between host and device roles.
- Practical note: exact capabilities depend on the manufacturer and exact part revision; a datasheet is needed for precise specs, pinout, and programming details.
If you share the vendor or a datasheet, I can give a precise introduction tailored to STOTG04EQTR.

STOTG04EQTR is ST’s USB On-The-Go transceiver/controller. There isn’t an exact vendor cross-reference. Closest substitutes are other USB-OTG controllers/bridges from different vendors, e.g., Maxim MAX3420E (SPI-to-USB OTG bridge) and similar OTG controllers, depending on package/interface. For a precise substitute, share your target package (e.g., QFN16) and MCU interface, and I’ll propose a pin-compatible option.

Pin count: 8 pins (SO-8/TSSOP-8).
Function: USB On-The-Go (OTG) controller/switch device. Provides OTG functionality for USB ports (DP/DM switching, ID detection, and VBUS control to support host/device roles).

- Manufacturer: STMicroelectronics (STMicroelectronics N.V.)
- What kind of company: A multinational semiconductor and electronics company that designs, manufactures, and sells integrated circuits and other electronic components.

STOTG04EQTR is a USB On-The-Go (OTG) transceiver/PHY with dual-role (host/device) capability. It provides full-/low-speed USB 2.0 interface, VBUS management, and ID pin detection.
Common applications:
- Portable consumer devices (phones, tablets, cameras, MP3 players) requiring OTG
- Embedded systems and microcontroller designs needing USB host/device interfaces
- USB peripherals and accessories (flash drives, keyboards, mice, printers, cameras)
- Development boards, evaluation kits, hubs and docking stations
- Automotive/industrial equipment needing USB OTG connectivity
(USB 2.0 FS/LS, dual-role, compact integration)

STOTG04EQTR uses Tape‑and‑Reel packaging (TR). The exact physical package (e.g., QFN/LQFP size) is specified in the ST datasheet for this part; please check the datasheet for the exact package geometry.