USB2514B-AEZC-TR

1 General Description

The SMSC USB251xB/xBi hub is a family of low-power,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 SMSC hub supports low- speed, full-speed, and hi-speed (if operating as a hi-speed hub) downstream devices on all of the enabled downstream ports.

2 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

3 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/pull- down 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 package:

   — 36-pin QFN (6x6 mm) lead-free RoHS compliant package

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

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

4 Applications

•  LCD monitors and TVs

•  Multi-function USB peripherals

•  PC motherboards

•  Set-top boxes, DVD players, DVR/PVR

•  Printers and scanners

•  PC media drive bay

•  Portable hub boxes

•  Mobile PC docking

•  Embedded systems

  

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