SMSC USB2507 - Manual (Page 14)

Integrated USB 2.0 Compatible 7-Port Hub
Datasheet
Revision 2.3 (08-27-07) 14 SMSC USB2507
DATASHEET
I/O12 Input/Output, 12mA
IOSD12 Open drain….12mA sink with Schmitt trigger, and must meet I2C-Bus Specification Version 2.1
requirements.
ICLKx XTAL Clock Input
OCLKx XTAL Clock Output
I-R RBIAS
IO-U Defined in USB Specification.
Note: Meets USB 1.1 requirements when operating as a 1.1-compliant device and meets USB
2.0 requirements when operating as a 2.0-compliant device.
AIO Analog Input/output. Per PHY test requirements.
Table 4.5 Buffer Type Descriptions (continued)
BUFFER DESCRIPTION