Microchip USB3503-I/ML USB 2.0 HSIC Hub Controller IC, 1-Channel 1 Mbps, 3.3V, 1.2V, 32-Pin SQFN USB3503-I/ML

Microchip USB3503-I/ML USB 2.0 HSIC Hub Controller IC is a high-speed inter-chip USB 2.0 hub controller designed to expand USB connectivity in portable and embedded systems. The device integrates three downstream USB 2.0 ports and interfaces via a high-speed HSIC upstream port. It supports data rates up to 1 Mbps and complies fully with the USB 2.0 standard.

Operating on dual supply voltages of 3.3V and 1.2V, the USB3503-I/ML incorporates internal voltage regulators to facilitate simplified power design. Featuring Microchip's RapidCharge Anywhere™ technology, this controller supports the USB-IF battery charging 1.1 standard to enable efficient and flexible device charging.

Designed to withstand harsh environments, it provides ESD protection on USB data lines up to ±15kV, enhancing reliability and lifespan. The product supports advanced power-saving modes delivering a minimal standby current of 1μA, which is crucial for battery-operated portable devices. Configuration and customization are enabled through a serial I2C slave interface, allowing precise control over device functions.

The device's versatile operation supports single or multi-TT (transaction translator) configurations, ensuring compatibility with low-speed and full-speed USB peripherals on the downstream ports. Its compact 32-pin SQFN package with a 5.1mm length and a height of 950μm makes it suitable for space-constrained PCB layouts in industrial, commercial, and consumer electronics applications.

Typical use cases include portable computing devices, USB hubs, and embedded USB expansion modules in communication and industrial control systems. It facilitates seamless USB port expansion while maintaining compliance and power efficiency needed in modern electronic designs.

Integrated USB 2.0-compatible 3-port hub with HSIC upstream port. Advanced power saving features with 1μA standby current. USB-IF BC 1.1 detection for battery charging. USB port ESD protection (DP/DM) ±15kV (IEC 61000-4-2).

Serial I2C slave port for enhanced configuration. Supports Single-TT or Multi-TT for full and low-speed devices. Internal 3.3V and 1.2V voltage regulators. Compact 32-pin SQFN surface mount package.

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