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Integrated USB 2.0 Compatible 3-Port Hub

Datasheet

SMSC USB2503/USB2503A 13 Revision 2.3 (08-27-07)

DATASHEET

VDD3P3

CORE

PLL

VDD33CR +3.3V I/O and Core power.

VSS VSS Ground.

Table 4.5 Buffer Type Descriptions

BUFFER DESCRIPTION

I Input.

IPD Input, with a weak Internal pull-down.

IPU Input, with a weak Internal pull-up.

IS Input with Schmitt trigger.

O12 Output 12mA.

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 4.4 Power, Ground, and No Connect (continued)

NAME SYMBOL TYPE FUNCTION

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 42 43

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