EVB-USB2514Q36-BAS, USB2513 and USB2512 36-Pin QFN Evaluation Board, Revision C User Manual
Revision 0.3 (08-12-10)
2
SMSC EVB-USB2514Q36-BAS Revision C
USER MANUAL
1 Overview
The SMSC USB2514 MultiTRAK™ is a Low-Power, full featured Hi-Speed USB 2.0 compliant hub with
four down-stream ports. The EVB-USB2514Q36-BAS Evaluation Board demonstrates a stand alone
application for the hub with all the features listed below and demonstrates the advanced power saving
options and configurable port assignments. Two other versions of the evaluation board are available
using the same printed circuit board (PCB) populated with either the USB2512, 2-port hub or the
USB2513, 3-port hub with part numbers EVB-USB2512Q36-BAS and EVB-USB2513Q36-BAS. The
PCB is labeled EVB-USB2514BCQFN36, Revision A for all assembly versions.
1.1
Features
Low pin count USB2514 36 - pin QFN package
- USB2512: 2-port version
- USB2513: 3-port version
Hi-Speed (480 Mbits/s), Full-Speed (12 Mbits/s), and Low-Speed (1.5 Mbits/s) compatible.
Operates from a single voltage (+5.0 VDC, regulated) 'wall wart' external power supply.
Low cost 4-layer design: two outer signal layers
- power inner layers
- ground inner layers
Optional pull-up resistors for disabling individual downstream ports.
Self-powered operation.
Multi-transaction translator enabled.
Supports internal default hub configuration.
Single o3.3 VDC regulator.
A footprint is provided for alternate regulator for industrial temperature operation.
Single crystal clock source.
Individual port over-current sensing.
Individual port power control.
Port overcurrent sensing (OCS)/port power control interface with LEDs for port power indication.
Red LED indicator for active hub state (not suspend).
EMI suppression provided by ferrite beads, selection of capacitors, and internal power/ground
layers.
ESD protection up to 25 kV direct contact to USB signals provided with diode bridges and common
mode chokes.
1.2
General Description
The EVB-USB2514Q36-BAS is a demonstration and low-cost evaluation platform featuring the
USB2514 MultiTRAK™ 4-port, Low-Power High-Speed USB2.0 Hub. It is designed to robustly
demonstrate the unique features of this device using a low-cost PCB implementation with individual
port power control. The EVB-USB2514 is designed for low cost, power efficient implementation of a
Hi-speed USB Hub with minimal bill of materials. Schematics, layout, and bill of materials are included
minimizing the customers new product development time.
Revision C of the EVB-USB2514Q36-BAS has a four-layer printed circuit board to improve coupling
between power and ground to reduce EMI. Ferrite beads have been added on all connector ground
and power nets. Protective diode bridges and common mode chokes were added to all USB signals.
and
show the top and bottom level silk screen and copper layers.
