GL3522-22 Datasheet

© 2014 Genesys Logic, Inc. - All rights reserved.

Page 7

GLI Confidential

CHAPTER 1

GENERAL DESCRIPTION

Genesys GL3522-22 is a 4-port, low-power, and configurable hub controller. It is compliant with the USB3.0

specification. GL3522-22 integrates Genesys Logic self-developed USB 3.0 Super Speed transmitter/receiver

physical layer (PHY) and USB 2.0 High-Speed PHY. It supports Super Speed, Hi-Speed, and Full-Speed USB

connections and is fully backward compatible to all USB 2.0 and USB 1.1 hosts. GL3522-22 also implements

multiple TT* (Note1) architecture providing dedicated TT* to each downstream (DS) port, which guarantees

Full-Speed(FS) data passing bandwidth when multiple FS devices perform heavy loading operations.

Furthermore, GL3522-22 has built-in 5V to 3.3V and 5V to 1.2V regulators, which saves customers’ BOM cost,

and eases for PCB design.

GL3522-22 features the native fast-charging and complies with USB-IF battery charging specification rev1.2, it

could fast-charge Apple, Samsung Galaxy devices, and any device complaint with BC1.2/1.1. It also allows

portable devices to draw up to 1.5A from GL3522-22 charging downstream ports (CDP

1) or dedicated charging

port (DCP

2). It can enable systems to fast charge handheld devices even during “Sleep” and “Power-off” modes.

Available package: QFN 76 (9x9 mm), LGA 76 (9x9 mm)

Package Type

# of DS Ports

Power Mgmt.

LED Support

Firmware Upgrade

QFN 76

4

Individual

Green/Amber

SPI Flash / EEPROM

LGA 76

4

Individual

Green/Amber

SPI Flash / EEPROM

GL3522-22 Package – Feature Summary

*Note: TT (transaction translator) implements the control logic defined in Section 11.14 ~ 11.22 of USB

specification revision 2.0. TT basically handles the unbalanced traffic speed between the USPORT

(operating in HS) and DSPORTS (operating in FS/LS) of hub.

1 CDP, charging downstream port, the Battery Charging Rev.1.2-compliant USB port that does data

communication and charges device up to 1.5A.

2 DCP, dedicated charging port, the Battery Charging Rev.1.2-compliant USB port that only charges devices up

to 1.5A, similar to wall chargers.