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USB2504A-JD

Integrated USB 2.0 Compatible 4-Port Hub

SMSC -> Microchip 

Block Diagram

Integrated USB2.0 Compatible 4-Port Hub

Upstream Upstream 24 MHz

USB Data VBUS Crystal

3.3V

To

Pin EEPROM

1.8V Strapping or SMBus

Cap Options Master

SD SCL

VBUS

Upstream Power

PLL

1.8V

Reg.

PHY

Detect

Repeater

SIE

Internal

Defaults

Select

Serial

Interface

Controller

TT TT TT TT

#1 #2 #3 #4

Port

Controller

Routing Logic

... Port #1

Downstream OC Sense

Port #4

Downstream OC Sense

PHY #1 Switch Driver

PHY #4 Switch Driver

LED Drivers

LED Drivers

Downstream OC Switch/LED

USB Data Sense Drivers

Downstream OC Switch/LED

USB Data Sense Drivers

Figure 1 4-Port Block Diagram

Revision 1.8 (11-11-05)

4

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SMSC USB2504/USB2504A

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