8
Integrated
Circuit
Systems, Inc.
ICS954201
0819H—02/17/06
Electrical Characteristics - CPU 0.7V Current Mode Differential Pair
TA = 0 - 70°C; VDD = 3.3 V +/-5%; CL =2pF, RS=33.2, RP=49.9, ΙREF = 475
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS Notes
Current Source Output
Impedance
Zo
VO = Vx
3000
1
Voltage High
VHigh
660
727
850
1,3
Voltage Low
VLow
-150
-2
150
1,3
Max Voltage
Vovs
752
1150
1
Min Voltage
Vuds
-300
-21
1
Crossing Voltage (abs)
Vcross
(abs)
250
348
550
mV
1
Crossing Voltage (var)
d-Vcross
Variation of crossing over all
edges
39
140
mV
1
Long Accuracy
ppm
see Tperiod min-max values
-300
300
ppm1,2
400MHz non-spread
2.4993
2.4999
2.5008
ns
2
400MHz spread
2.4993
2.5133
ns
2
333.33MHz non-spread
2.9991
3.0000
3.0009
ns
2
333.33MHz spread
2.9991
3.016
ns
2
266.66MHz non-spread
3.7489
3.7509
3.7511
ns
2
266.66MHz spread
3.7489
3.77
ns
2
200MHz non-spread
4.9985
4.9998
5.0015
ns
2
200MHz spread
4.9985
5.0266
ns
2
166.66MHz non-spread
5.9982
6.0000
6.0018
ns
2
166.66MHz spread
5.9982
6.0320
ns
2
133.33MHz non-spread
7.4978
7.5017
7.5023
ns
2
133.33MHz spread
7.4978
5.4000
ns
2
100.00MHz non-spread
9.9970
10.0000
10.0030
ns
2
100.00MHz spread
9.9970
10.0533
ns
2
400MHz non-spread
2.4970
2.5750
ns
1,2
400MHz spread
2.5983
ns
1,2
333.33MHz non-spread
2.9940
3.0859
ns
1,2
333.33MHz spread
3.1010
ns
1,2
266.66MHz non-spread
3.7430
3.8361
ns
1,2
266.66MHz spread
3.8550
ns
1,2
200MHz non-spread
4.9940
5.0865
ns
1,2
200MHz spread
5.1116
ns
1,2
166.66MHz non-spread
5.9950
6.0868
ns
1,2
166.66MHz spread
6.1170
ns
1,2
133.33MHz non-spread
7.4970
7.5873
ns
1,2
133.33MHz spread
7.6250
ns
1,2
100.00MHz non-spread
10.0000
10.0880
ns
1,2
100.00MHz spread
10.1383
ns
1,2
Rise Time
tr
VOL = 0.175V, VOH = 0.525V
175
230
700
ps
1
Fall Time
tf
VOH = 0.525V VOL = 0.175V
175
206
700
ps
1
Rise Time Variation
d-tr
15
125
ps
1
Fall Time Variation
d-tf
14
125
ps
1
Duty Cycle
dt3
Measurement from differential
wavefrom
45
51
55
%
1
CPU(1:0), VT = 50%
7.5
100
ps
1
CPU2_ITP, VT = 50%
145
150
ps
1
Jitter, Cycle to cycle
tjcyc-cyc
Differential waveform
measurement, CPU(1:0)
36
85
ps
1
Jitter, Cycle to cycle
tjcyc-cyc
Differential waveform
measurement, CPU2_ITP
96
125
ps
1
1Guaranteed 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
3I
REF = VDD/(3xRR). For RR = 475 (1%), IREF = 2.32mA. IOH = 6 x IREF and VOH = 0.7V @ ZO=50.
2.4143
2.9141
Average period
Tperiod
Absolute min/max period
Tabs
9.9120
Statistical measurement on single
ended signal using oscilloscope
math function.
mV
Measurement on single ended
signal using absolute value.
mV
Skew
tsk3
3.6639
4.9135
5.9132
7.4128