USB3450-FZG SMSC [SMSC Corporation], USB3450-FZG Datasheet - Page 14

• Manufacturer Part Number: USB3450-FZG
• Description: HI-SPEED USB HOST OR DEVICE PHY WITH UTMI+INTERFACE
• Manufacturer: SMSC [SMSC Corporation]

Revision 0.1 (05-11-05)
PIN
36
37
38
39
40
GND FLAG
VDDA1.8
VDD3.3
VDD3.3
RBIAS
NAME
XI
Table 3.1 USB3450 Pin Definitions (continued)
DIRECTION,
Analog,
Ground
Analog
CMOS
TYPE
Input,
N/A
N/A
N/A
DATASHEET
ACTIVE
LEVEL
N/A
N/A
N/A
N/A
N/A
N/A
14
DESCRIPTION
Crystal pin. A 24MHz crystal is supported. The
crystal is placed across XI and XO. An external
24MHz clock source may be driven into XI in place
of a crystal.
1.8V regulator output for analog circuitry on chip.
Place a 0.1uF capacitor near this pin and connect
the capacitor from this pin to ground. In parallel,
place a 4.7uF low ESR capacitor near this pin and
connect the capacitor from this pin to ground. See
Section 6.6.1, "Internal
3.3V PHY Supply. Provides power for Hi-Speed
Transceiver, UTMI+ Digital, Digital I/O, and
Regulators.
3.3V PHY Supply. Should be connected directly to
pin 39.
External 1% bias resistor. Requires a 12KΩ resistor
to ground.
Ground. The flag must be connected to the ground
plane.
Hi-Speed USB Host or Device PHY With UTMI+ Interface
Regulators".
SMSC USB3450
Datasheet