參數(shù)資料
型號: 24707_PUB
英文描述: Programmable Resolution 1-Wire Digital Thermometer
中文描述: 時鐘發(fā)生器規(guī)格的AMD Athlon? 64和AMD Opteron?處理器
文件頁數(shù): 34/51頁
文件大小: 1783K
代理商: 24707_PUB
Clock Generator Specification for AMD64 Processors
24707 Rev. 3.08 September 2003
7.3.6
USB, 24_48MHz Clock Outputs
The USB and 24_48MHz clock output electrical characteristics are described in Table 11.
Table 11. 24_48 MHz, USB Clock Output Electrical Characteristics
(Lump Capacitance Test Load = 20 pF)
24_48MHz
USB, 24_48MHz
Parameter
Description
Test Conditions
Min
Typ
Max
Min Typ
Ma
x
Unit
V
OL
Output Low
Voltage
Output High
Voltage
Output Low
Current
Output High
Current
Frequency,
Actual
Output Rise
Edge Rate
Output Fall
Edge Rate
Duty Cycle
I
OL
= 9mA
0.4
0.4
V
V
OH
I
OH
= -12mA
2.4
2.4
V
I
OL
V
OL
= 0.8V
16
16
mA
D
I
OH
V
OL
= 2.0V
-22
–22
mA
f
Determined by PLL
divider ratio
Measured from 20%
to 80%
Measured from 80%
to 20%
Measured on rising
and falling edge at
1.5V
Measured on rising
edge at 1.5V.
Maximum difference
of cycle time between
two adjacent cycles.
Measured on rising
edge at 1.5V.
Maximum difference
of cycle time between
two adjacent cycles.
24.004
48.008
MHz
t
R
0.5
2
0.5
2
V/ns
t
F
0.5
2
0.5
2
V/ns
t
D
45
55
45
55
%
t
JC
Jitter, Cycle-
to-Cycle for
24_48MHz
clock
0
250
500
0
250
500
ps
A
t
JC
Jitter, Cycle-
to-Cycle for
USB clock
(required for
USB2.0)
0
200
ps
30
Electrical Specifications
Chapter 7
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