ICS954101 Datasheet, PDF (7/16 Pages) Integrated Circuit Systems – Programmable Timing Control Hub for Desktop P4 Systems

Integrated
Circuit
Systems, Inc.
ICS954101
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 / _REF / 9,
PARAMETER
SYMBOL
CONDITIONS
MIN
Current Source Output
Zo
Impedance
V_O = V_x
3000
Voltage High
Voltage Low
VHigh
VLow
Statistical measurement on single
ended signal using oscilloscope
math function.
660
-150
Max Voltage
Min Voltage
Crossing Voltage (abs)
Vovs
Vuds
Vcross(abs)
Measurement on single ended
signal using absolute value.
-300
250
TYP MAX
850
150
1150
550
UNITS NOTES
1
1
mV
1
mV
1
1
mV
1
Crossing Voltage (var)
d-Vcross Variation of crossing over all edges
140
mV
1
Long Accuracy
Average period
Absolute min period
Rise Time
Fall Time
Rise Time Variation
Fall Time Variation
Duty Cycle
Skew
ppm
Tperiod
T_absmin
t_r
t_f
d-t_r
d-t_f
d_t3
t_sk3
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
-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
Measurement from differential
wavefrom
45
CPU (1:0) V_T = 50%
300
ppm
1,2
2.5008
ns
2
2.5133
ns
2
3.0009
ns
2
3.016
ns
2
3.7511
ns
2
3.77
ns
2
5.0015
ns
2
5.0266
ns
2
6.0018
ns
2
6.0320
ns
2
7.5023
ns
2
5.4000
ns
2
10.0030 ns
2
10.0533 ns
2
ns
1,2
ns
1,2
ns
1,2
ns
1,2
ns
1,2
ns
1,2
ns
1,2
700
ps
1
700
ps
1
125
ps
1
125
ps
1
55
%
1
100
ps
1
Skew
t_sk4
CPU (1:0) to CPU_ITP, V_T = 50%
150
ps
1
Jitter, Cycle to cycle
t_jcyc-cyc
Measurement from differential
wavefrom
85
ps
1
1_{Guaranteed by design, not 100% tested in production.}
2 _{All Long Term Accuracy and Clock Period specifications are guaranteed assuming that REFoutput is at 14.31818MHz}
0815D—06/21/04
7