USB2513 datasheet(16/48 Pages) SMSC

16 / 48 page

USB 2.0 High-Speed 3-Port Hub Controller

Datasheet

Revision 1.98 (11-19-07)

SMSC USB2513

DATASHEET

3.2

Buffer Type Descriptions

Table 3.3 USB2514 Power, Ground, No Connect

PACKAGE

SYMBOL

36 QFN

48 QFN

FUNCTION

VDD18

VDD Core

+1.8V core power. If the internal regulator is enabled, then this pin

must have a 1.0

μF (or greater) ±20% (ESR <0.1Ω) capacitor to

VSS.

VDD33PLL

VDD 3.3 PLL Regulator Reference

+3.3V power supply for the PLL. If the internal PLL 1.8V regulator

is enabled, then this pin acts as the regulator input.

VDDPLL18

VDD PLL

+1.8V Filtered analog power for internal PLL. If the internal

regulator is enabled, then this pin must have a 1.0

μF (or greater)

±20% (ESR <0.1

Ω) capacitor to VSS.

VDDA33

VDD Analog I/O

+3.3V Filtered analog PHY power, shared between adjacent ports.

VDD33/VDD33CR

VDDIO/VDD 3.3 Core Regulator Reference

+3.3V power supply for the Digital I/O

If the internal core regulator is enabled, then VDD33CR acts as

the regulator input.

VSS

n/a

VSS

Ground

Table 3.4 USB2514 Buffer Type Descriptions

BUFFER

DESCRIPTION

Input.

IPD

Input with internal weak pull-down resistor.

IPU

Input with internal weak pull-up resistor.

Input with Schmitt trigger.

O12

Output 12mA.

OD12

Open drain... 12mA sink.

I/O12

Input/Output buffer with 12mA sink and 12mA source.

USB2513 数据表(PDF) 16 Page - SMSC Corporation

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