Microchip Technology USB2513B/M2-Hi-Speed Hub Controller

USB251xB Description

The Microchip USB251xB hub is a family of lowpower, configurable, MTT (multi transaction translator) hub controller IC products for embedded USB solutions. The x in the part number indicates the number of downstream ports available, while the B indicates battery charging support. The Microchip hub supports lowspeed, full-speed, and hi-speed (if operating as a hispeed hub) downstream devices on all of the enabled downstream ports.

Highlights

• High performance, low-power, small footprint hub controller IC with 2, 3, or 4 downstream ports

• Fully compliant with the USB 2.0 Specification

• Enhanced OEM configuration options available through either a single serial I2C EEPROM, or SMBus slave port

• MultiTRAKTM

- High-performance multiple transaction translator which provides one transaction translator per port

• PortMap

- Flexible port mapping and disable sequencing

• PortSwap

- Programmable USB differential-pair pin locations ease PCB design by aligning USB signal lines directly to connectors

• PHYBoost

- Programmable USB signal drive strength for recovering signal integrity using 4-level driving strength resolution

Block Diagram

Pin Diagram

Features

• USB251xB/xBi products are fully footprint compatible with USB251x/xi/xA/xAi products as direct drop-in replacements

— Cost savings include using the same PCB components and application of USB-IF Compliance by Similarity

• Full power management with individual or ganged power control of each downstream port

• Fully integrated USB termination and pull-up/pulldown resistors

• Supports a single external 3.3 V supply source; internal regulators provide 1.2 V internal core voltage

• Onboard 24 MHz crystal driver or external 24 MHz clock input

• Customizable vendor ID, product ID, and device ID

• 4 kilovolts of HBM JESD22-A114F ESD protection (powered and unpowered)

• Supports self- or bus-powered operation

• Supports the USB Battery Charging specification

Rev. 1.1 for Charging Downstream Ports (CDP)

• The USB251xB/xBi offers the following packages:

- 36-pin SQFN (6x6 mm) (Preferred)

- 36-pin QFN (6x6 mm) (Legacy)

• USB251xBi products support the industrial temperature range of -40ºC to +85ºC

• USB251xB products support the extended commercial temperature range of 0ºC to +85ºC

Battery Charging

A downstream port enabled for battery charging turns on port power as soon as the power on reset and hardware con-

figuration process has completed. The hub does not need to be enumerated nor does VBUS_DET need to be asserted for the port power to be enabled. These conditions allow battery charging in S3, S4, and S5 system power states as well as in the fully operational state. The USB Battery Charging Specification does not interfere with standard USB operation, which allows a device to perform battery charging at any time.

A port that supports battery charging must be able to support 1.5 amps of current on VBUS. Standard USB port power controllers typically only allow for 0.8 amps of current before detecting an over current condition. Therefore, the 5 volt power supply, port power controller, or over-current protection devices must be chosen to handle the larger current demand compared to standard USB hub designs.

USB2513B/M2 Product Parameter

USB2513B/M2 Manufacturer

Microchip Technology Incorporated is a leading provider of smart, connected and secure embedded control solutions. Its easy-to-use development tools and comprehensive product portfolio enable customers to create optimal designs, which reduce risk while lowering total system cost and time to market. The company's solutions serve more than 125,000 customers across the industrial, automotive, consumer, aerospace and defense, communications and computing markets.