ICS951413 Datasheet, PDF (17/23 Pages) Integrated Circuit Systems – Programmable System Clock Chip for ATI RS400 P4-based Systems

Integrated
Circuit
Systems, Inc.
ICS951413
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=33.2Ω, R_P=49.9Ω, Ι_REF = 475Ω
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
Measurement on single
ended signal using
3000
660
-150
-300
Ω
1
850 _mV 1,3
150
1,3
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 9.9970
100.00MHz spread 9.9970
10.0030 ns 2
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
175
V_OL = 0.175V
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
V_T = 50%
250 ps 1
Jitter, Cycle to cycle
t_jcyc-cyc
Measurement from
differential wavefrom
125 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_{IREF = VDD/(3xRR). For RR = 475Ω (1%), IREF = 2.32mA. IOH = 6 x IREF and VOH = 0.7V @ ZO=50Ω.}
0929C—03/07/05
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