General Description
The Microchip USB251xB/xBi 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 [1]
• 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
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
USB2513BI-AEZG
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