W83194BR-603 Datasheet, PDF (9/26 Pages) Winbond – Winbond Clock Generator For INTEL P4 Springdale Series Chipset

W83194BR-603/W83194BG-603
CLOCK GEN. FOR INTEL P4 SPRINGDALE/PRESCOTT SERIES CHIPSET
5.5 Power Management Pins
PIN
PIN NAME
TYPE
DESCRIPTION
33
VTT_PWRGD#
IN Power good input signal is power on trapping with LOW
active. This 3.3V input is level sensitive strobe used to
determine FS [4:0]. This pin is LOW active.
20
PD#*
IN_tp120k Power Down Function. This is power down pin, low active
(PD#).
Internal 120K pull up
46 IREF
OUT 　 Deciding the reference current for the CPU CLOCK
pairs. The pin was connected to the precision resistor
tied to ground to decide the appropriate current.
5.6 IREF selects Function
BOARD TARGET
TRACE/TERM Z
REFERENCE R, IREF =
ADD/(3*RR)
50 Ω
50 Ω
Rr =221 1%
IREF = 5.00mA
Rr =475 1%
IREF = 2.32mA
OUTPUT
CURRENT
Ioh=4*IREF
Ioh=6*IREF
VOH @ Z
1.0V @ 50
0.7V @ 50
5.7 Power Pins
PIN
3
10,16
27
40
24
34
48
7,12,19,25,29,
38,44,47
PIN NAME
VDDREF
VDDPCI
VDD3V66
VDDCPU
VDD48
VDD
VDDA
GND
TYPE
PWR
PWR
PWR
PWR
PWR
PWR
PWR
PWR
DESCRIPTION
3.3V power supply for REF.
3.3V power supply for PCI.
3.3V power supply for 3V66.
3.3V power supply for CPU.
3.3 power supply for 48MHz.
3.3V power supply for SRC.
3.3V power for Analog power
Ground pin
Publication Release Date: March, 2006
-5-
Revision 0.7