EVB-USB2412 SMSC, EVB-USB2412 Datasheet - Page 2

• Manufacturer Part Number: EVB-USB2412
• Description: EVALUATION BOARD FOR USB2412
• Manufacturer: SMSC

Specifications of EVB-USB2412

• Design Resources: EVB-USB2412 Schematic EVB-USB2412 BOM
• Main Purpose: Interface, USB 2.0 Hub
• Embedded: No
• Utilized Ic / Part: USB2421
• Primary Attributes: Dual Port Hub, High Speed (480Mbps)
• Secondary Attributes: Single 5V Supply
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 638-1106

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Revision 0.2 (02-02-10)
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1.2
Overview
Features
General Description
The SMSC USB2412 hub is a low-power, single transaction translator (STT) hub controller IC with two
downstream ports for embedded USB solutions. The SMSC hub controller supports low-speed, full-
speed, and hi-speed (if operating as a hi-speed hub) downstream devices on all of the enabled
downstream ports. The EVB-USB2412 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 status.
The EVB-USB2412 is a demonstration and low-cost evaluation platform featuring the USB2412 single
transaction translator 2-port Low-Power High-Speed USB2.0 Hub. It is designed to robustly
demonstrate the unique features of this device using a low-cost printed circuit board (PCB)
implementation with individual port power control. The EVB-USB2412 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 to minimize product development time.
Revision A1 of the EVB-USB2412 has a four-layer PCB to improve coupling between power and
ground and to reduce EMI. Since implementations of this device may use two-layer PCBs, the EVB-
USB2412 has been designed to illustrate such an implementation with its outer two layers. Many
unpopulated (DNP) sites are incorporated to support optional EMI and ESD support components
beyond the minimal BOM for proper function.
Revision A1 of the EVB-USB2412 also has an added resistor (R23, 100 Kohms) pull down on
NON_REM1 for configuration purposes.
Low pin count USB2412 28 - pin QFN package
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 (Self-
powered operation)
- can be configured for Bus-powered testing by use of a Schottky diode at location D1
Low cost 4-layer design: two outer signal layers illustrate a two-layer implementation
- ground inner layers
Single transaction translator operation
Supports internal default hub configuration
Single onboard +3.3 VDC regulator
- A footprint is provided for alternate regulator for industrial temperature operation
Single crystal clock source
Individual port over-current sensing and port power control
Optional LEDs for port power indication
Configured to report both down stream ports as removable
- can be configured to report either, or both, down stream ports as removable
Additional EMI suppression provided by optional ferrite bead locations
ESD protection up to 25 kV direct contact to USB signals provided with optional diode bridges and
common mode chokes
USER MANUAL
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EVB-USB2412 Evaluation Board User Manual
SMSC EVB-USB2412