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参数资料
型号： W204
英文描述： Clocks and Buffers
中文描述： 时钟和缓冲器
文件页数： 11/16页
文件大小： 177K
代理商： W204
W204
PRELIMINARY
Document #: 38-07264 Rev. *A
Page 11 of 16
Absolute Maximum Ratings
[3]
Stresses greater than those listed in this table may cause per-
manent damage to the device. These represent a stress rating
only. Operation of the device at these or any other conditions
above those specified in the operating sections of this specifi-
cation is not implied. Maximum conditions for extended peri-
ods may affect reliability.
Parameter
V
DD
, V
IN
T
STG
T
B
T
A
ESD
PROT
Description
Rating
–
0.5 to +7.0
–
65 to +150
–
55 to +125
0 to +70
2 (min.)
Unit
V
°
C
°
C
°
C
kV
Voltage on any pin with respect to GND
Storage Temperature
Ambient Temperature under Bias
Operating Temperature
Input ESD Protection
DC Electrical Characteristics:
T
A
= 0
°
C to +70
°
C, V
DDQ3
= 3.3V±5%, V
DDQ2
= 2.5V±5%
Parameter
Description
Supply Current
I
DDQ3
3.3V Supply Current
Test Condition
Min.
Typ.
Max.
Unit
CPU0:3 =100 MHz
Outputs Loaded
[4]
120
mA
I
DDQ2
Logic Inputs
V
IL
V
IH
I
IL
I
IH
2.5V Supply Current
60
mA
Input Low Voltage
Input High Voltage
Input Low Current
[5]
Input High Current
[5]
Input Low Current (FS0)
Input High Current (FS0)
GND
–
0.3
2.0
0.8
V
V
μA
μA
μA
μA
V
DD
+ 0.3
–
25
10
–
5
+5
Clock Outputs
V
OL
V
OH
V
OH
I
OL
Output Low Voltage
Output High Voltage
Output High Voltage (CPU, APIC)
Output Low Current
I
OL
= 1 mA
I
OH
=
–
1 mA
I
OH
=
–
1 mA
V
OL
= 1.25V
V
OL
= 1.5V
V
OL
= 1.25V
V
OL
= 1.5V
V
OL
= 1.5V
V
OL
= 1.25V
V
OL
= 1.5V
V
OL
= 1.25V
V
OL
= 1.5V
V
OL
= 1.5V
50
mV
V
V
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
3.1
2.2
27
20.5
40
25
25
25
31
40
27
27
CPU0:3
PCI_F, PCI1:7
APIC0:1
REF0:2
48MHz 0:1
CPU0:3
PCI_F, PCI1:7
APIC0:1
REF0:2
48MHz 0:1
57
53
85
37
37
55
55
87
44
44
97
139
140
76
76
97
189
155
94
94
I
OH
Output High Current
Crystal Oscillator
V
TH
C
LOAD
X1 Input Threshold Voltage
[6]
Load Capacitance, as seen by
External Crystal
[7]
X1 Input Capacitance
[8]
V
DDQ3
= 3.3V
1.65
14
V
pF
C
IN,X1
Notes:
3.
4.
5.
6.
7.
Pin X2 unconnected
28
pF
Multiple Supplies:
The voltage on any input or I/O pin cannot exceed the power pin during power-up. Power supply sequencing is NOT required.
All clock outputs loaded with 6
”
60
transmission lines with 20-pF capacitors.
W204 logic inputs have internal pull-up resistors, except FS0 (pull-ups not full CMOS level).
X1 input threshold voltage (typical) is V
/2.
The W204 contains an internal crystal load capacitor between pin X1 and ground and another between pin X2 and ground. Total load placed on crystal is
14 pF; this includes typical stray capacitance of short PCB traces to crystal.
X1 input capacitance is applicable when driving X1 with an external clock source (X2 is left unconnected).
8.
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