參數(shù)資料
型號： ICSXXXXYGLFT
英文描述： System Clock Chip for ATI RS400 P4TM-based Systems
中文描述： 系統(tǒng)時鐘芯片的支持ATI RS400 P4TM的系統(tǒng)
文件頁數(shù)： 12/19頁
文件大小： 206K
代理商： ICSXXXXYGLFT
12
Integrated
Circuit
Systems, Inc.
ICS951411
0891E—03/07/05
Electrical Characteristics - CPU 0.7V Current Mode Differential Pair
T
A
= 0 - 70°C; V
DD
= 3.3 V +/-5%; C
L
=2pF, R
S
=33.2
, R
P
=49.9
, Ι
REF
= 475
PARAMETER
SYMBOL
Current Source Output
Impedance
CONDITIONS
MIN
TYP
MAX
UNITS
NOTES
Zo
V
O
= V
x
3000
1
Voltage High
VHigh
660
850
1,3
Voltage Low
VLow
-150
150
1,3
Max Voltage
Min Voltage
Crossing Voltage (abs)
Vovs
Vuds
1150
1
1
1
-300
250
Vcross(abs)
550
mV
Crossing Voltage (var)
d-Vcross
Variation of crossing over all
edges
see Tperiod min-max values
400MHz nominal
400MHz spread
333.33MHz nominal
333.33MHz spread
266.66MHz nominal
266.66MHz spread
200MHz nominal
200MHz spread
166.66MHz nominal
166.66MHz spread
133.33MHz nominal
133.33MHz spread
100.00MHz nominal
100.00MHz spread
400MHz nominal/spread
333.33MHz nominal/spread
266.66MHz nominal/spread
200MHz nominal/spread
166.66MHz nominal/spread
133.33MHz nominal/spread
100.00MHz nominal/spread
V
OL
= 0.175V, V
OH
= 0.525V
V
OH
= 0.525V V
OL
= 0.175V
140
mV
1
Long Accuracy
ppm
-300
2.4993
2.4993
2.9991
2.9991
3.7489
3.7489
4.9985
4.9985
5.9982
5.9982
7.4978
7.4978
9.9970
9.9970
2.4143
2.9141
3.6639
4.8735
5.8732
7.3728
9.8720
175
175
300
2.5008
2.5133
3.0009
3.016
3.7511
3.77
5.0015
5.0266
6.0018
6.0320
7.5023
7.5400
10.0030
10.0533
ppm
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ps
ps
ps
ps
1,2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
1,2
1,2
1,2
1,2
1,2
1,2
1,2
1
1
1
1
Rise Time
Fall Time
Rise Time Variation
Fall Time Variation
t
r
t
f
700
700
125
125
d-t
r
d-t
f
Duty Cycle
d
t3
Measurement from differential
wavefrom
CPU(1:0), V
T
= 50%
CPU(1:0) to CPU2_ITP,
V
T
= 50%
Measurement from differential
wavefrom (CPU2_ITP)
Measurement from differential
wavefrom, (CPU(1:0))
45
55
%
1
Skew
t
sk3
100
ps
1
Skew
t
sk4
150
ps
1
Jitter, Cycle to cycle
t
jcyc-cyc
125
ps
1
Jitter, Cycle to cycle
t
jcyc-cyc
85
ps
1
1
Guaranteed by design and characterization, not 100% tested in production.
2
All Long Term Accuracy and Clock Period specifications are guaranteed assuming that REFOUT is at 14.31818MHz
3
I
REF
= V
DD
/(3xR
R
). For R
R
= 475
(1%), I
REF
= 2.32mA. I
OH
= 6 x I
REF
and V
OH
= 0.7V @ Z
O
=50
.
T
absmin
Absolute min period
Statistical measurement on single
ended signal using oscilloscope
math function.
Measurement on single ended
signal using absolute value.
mV
mV
Average period
Tperiod
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