ICS954101 Datasheet, PDF (8/16 Pages) Integrated Circuit Systems – Programmable Timing Control Hub for Desktop P4 Systems

Integrated
Circuit
Systems, Inc.
ICS954101
Electrical Characteristics - SRC 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 TYP MAX UNITS NOTES
Current Source Output
Impedance
Voltage High
Voltage Low
Max Voltage
Min Voltage
Zo
VHigh
VLow
Vovs
Vuds
V_O = V_x
Statistical measurement on single
ended signal using oscilloscope
Measurement on single ended
signal using absolute value.
3000
660
-150
-300
1
850 _mV
1
150
1
1150 _mV
1
1
Crossing Voltage (abs) Vcross(abs)
250 350 550 mV
1
Crossing Voltage (var) d-Vcross
Variation of crossing over all
edges
12 140 mV
1
Long Accuracy
ppm
see Tperiod min-max values -300
300 ppm 1,2
Average period
Tperiod
100.00MHz nominal
100.00MHz spread
9.9970
10.0030 ns
2
9.9970
10.0533 ns
2
Absolute min period Tabsmin
100.00MHz nominal/spread 9.8720
ns 1,2
Rise Time
t_r
V_OL = 0.175V, V_OH = 0.525V
175
700 ps
1
Fall Time
t_f
V_OH = 0.525V V_OL = 0.175V
175
700 ps
1
Rise Time Variation
d-t_r
30 125 ps
1
Fall Time Variation
d-t_f
30 125 ps
1
Duty Cycle
d_t3
Measurement from differential
wavefrom
45
55
%
1
Skew
t_sk3
SRC(7:0), V_T = 50%
250 ps
1
Jitter, Cycle to cycle
t_jcyc-cyc
Measurement from differential
wavefrom
125 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
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