ICS954119 Datasheet, PDF (13/17 Pages) Integrated Circuit Systems – Programmable Timing Control Hub™ for Next Gen P4™ processor

Integrated
Circuit
Systems, Inc.
ICS954119
Advance Information
Electrical Characteristics - CPUCLKT/C -- 0.7V Current Mode Differential Pair
PARAMETER
SYMBOL
CONDITIONS*
MIN
TYP
MAX
UNITS
Current Source Output
Impedance
Zo
V_O = V_x
3000
Ω
Voltage High
VHigh
Statistical measurement on
660
850
mV
Voltage Low
VLow
single ended signal
-150
150
mV
Max Voltage
Min Voltage
Vovs
Vuds
Measurement on single ended
signal using absolute value.
-300
1150
mV
mV
Crossing Voltage (abs)
Crossing Voltage (var)
Long Accuracy
Vx(abs)
d-Vx
ppm
Variation of crossing over all
edges
see Tperiod min-max values
250
-300
550
mV
140
mV
300
ppm
400MHz nominal
2.4993
2.5008
ns
400MHz spread
2.4993
2.5133
ns
333.33MHz nominal
2.9991
3.0009
ns
333.33MHz spread
2.9991
3.016
ns
266.66MHz nominal
3.7489
3.7511
ns
266.66MHz spread
3.7489
3.77
ns
Average period
Tperiod
200MHz nominal
200MHz spread
4.9985
4.9985
5.0015
ns
5.0266
ns
166.66MHz nominal
5.9982
6.0018
ns
166.66MHz spread
5.9982
6.0320
ns
133.33MHz nominal
7.4978
7.5023
ns
133.33MHz spread
7.4978
7.5400
ns
100.00MHz nominal
9.9970
10.0030
ns
100.00MHz spread
9.9970
10.0533
ns
400MHz nominal/spread
2.4143
ns
333.33MHz nominal/spread 2.9141
ns
266.66MHz nominal/spread 3.6639
ns
Absolute min period
T_absmin
200MHz nominal/spread
4.8735
ns
166.66MHz nominal/spread 5.8732
ns
133.33MHz nominal/spread 7.3728
ns
100.00MHz nominal/spread 9.8720
ns
Rise Time
t_r
V_OL = 0.175V, V_OH = 0.525V
175
Fall Time
t_f
V_OH = 0.525V V_OL = 0.175V
175
Rise Time Variation
d-t_r
V_OL = 0.175V, V_OH = 0.525V
Fall Time Variation
Duty Cycle
d-t_f
V_OH = 0.525V V_OL = 0.175V
d_t3
Measurement from differential
wavefrom
45
Skew
Skew
Jitter, Cycle to cycle
t_sk3
t_sk4
t_jcyc-cyc
CPU(1:0), V_T = 50%
CPU(1:0) to CPU2_ITP,
V_T = 50%
Measurement from differential
wavefrom (CPU2_ITP)
Jitter, Cycle to cycle
t_jcyc-cyc
Measurement from differential
wavefrom, (CPU(1:0))
*T_A = 0 - 70°C; V_DD = 3.3 V +/-5%; C_L =2pF, R_S=33.2Ω, R_P=49.9Ω, Ι_REF = 475Ω
1_{Guaranteed by design and characterization, not 100% tested in production.}
700
ps
700
ps
125
ps
125
ps
55
%
100
ps
150
ps
125
ps
85
ps
2 _{All Long Term Accuracy and Clock Period specifications are guaranteed assuming that REFOUT is at 14.31818MHz}
3_{IREF = VDD/(3xRR). For RR = 475Ω (1%), IREF = 2.32mA. IOH = 6 x IREF and VOH = 0.7V @ ZO=50Ω.}
0875—05/24/04
NOTES
1
1,3
1,3
1
1
1
1
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
1
1
1
1
1
13