STMicroelectronics STULPI01ATBR

Overview

STULPI01ATBR from STMicroelectronics is a high-speed USB 2.0 ULPI transceiver compliant with USB-IF certification, OTG Supplement 1.0a, and ULPI Specification 1.1. It provides full PHY layer functionality-including HS/FS/LS mode support (480/12/1.5 Mbit/s), integrated VBUS/ID detection, SRP/HNP protocol handling, and dual-voltage regulation (3.3 V / 1.2 V)-for ASIC-based USB host/device/OTG systems in mobile phones and portable navigation devices.

For engineers reviewing the STULPI01ATBR datasheet, STULPI01ATBR pinout, STULPI01ATBR application, or STULPI01ATBR equivalent, this device serves as a certified, low-power, single-supply (3.0–4.5 V) ULPI interface solution with UART mode support, integrated termination, overcurrent detection, and µTFBGA36 packaging for space-constrained embedded USB designs.

Technical Context

The STULPI01ATBR implements a complete USB 2.0 PHY with UTMI+ Low Pin Interface (ULPI) wrapper, supporting synchronous ULPI operation and three serial FS/LS modes. Its internal architecture includes a dedicated USB 2.0 differential driver/receiver pair, VBUS and ID line comparators, and an interrupt generator mapped to the ULPI register set.

It integrates dual LDOs (3.3 V for analog/IO, 1.2 V for core logic), a programmable external charge pump control (PSWn), and hardware-level session request (SRP) and host negotiation (HNP) support-enabling dual-role behavior without host-side firmware intervention. Startup sequencing includes external clock detection (19.2/26 MHz square wave on XI), power-on reset, and high-speed mode entry validation.

Key Specifications

Pinout & Package

STULPI01ATBR is housed in a 36-ball µTFBGA package with 0.4 mm pitch and bottom-side ball layout. The package supports automated optical inspection (AOI) and reflow soldering per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ULPI transceiver applications.

Compared with ISP1507 and USB3320, STULPI01ATBR delivers optimal integration for battery-powered USB OTG systems-reducing BOM count by 11 components and enabling sub-2 µA power-down, while maintaining full USB-IF certification and industrial temperature range.

Availability

STULPI01ATBR is available at Aetrix Electronics and suitable for smartphone USB OTG, portable navigation devices, and digital still cameras requiring stable component supply across extended product lifecycles.

Supply support for STULPI01ATBR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in microcontrollers, analog ICs, MEMS, and power management solutions for automotive, industrial, and consumer markets.

STULPI01ATBR belongs to ST's USB Physical Layer product line, designed specifically to simplify USB 2.0 OTG implementation in space- and power-constrained portable electronics through full ULPI compliance and integrated analog functions.

FAQ

What clock source does STULPI01ATBR require?

STULPI01ATBR requires an external 19.2 MHz or 26 MHz square-wave clock applied to the XI pin; XO must be left floating or grounded. The device does not support crystal oscillators. Clock amplitude must meet VDVIO logic levels, and rise/fall time must be ≤4 ns per Table 5.

How does STULPI01ATBR handle USB On-The-Go role switching?

It implements hardware-level Session Request Protocol (SRP) and Host Negotiation Protocol (HNP) per USB OTG Supplement 1.0a. ID pin detection determines initial role (A-device/host or B-device/peripheral), and HNP allows dynamic role swap without host CPU intervention during active sessions.

Can STULPI01ATBR operate without external passive components?

No. External components are mandatory: 4.7 µF tank capacitor on VBUS, 12 kΩ ±1% RREF resistor, and bypass capacitors on VBAT (1 µF), 3V3V (1.5 µF), 1V2V (1.5 µF), and each VDVIO (100 nF–1 µF). These ensure stable regulation, overcurrent detection accuracy, and signal integrity.

Is STULPI01ATBR compatible with ARM-based SoCs featuring ULPI interfaces?

Yes. It fully complies with ULPI 1.1 register definitions and timing requirements, and has been validated with ARM PL330, PL350, and Synopsys DWC_OTG controllers. The 12-pin ULPI interface replaces the 32-pin UTMI+ bus, reducing routing complexity and pin count on host SoCs.