ICS950902 Datasheet, PDF (14/20 Pages) Integrated Circuit Systems – Programmable Timing Control Hub™ for P4™

Integrated
Circuit
Systems, Inc.
ICS950902
Electrical Characteristics-CPUCLKC/T
T_A = 0 - 70°C; V_DD = 3.3 V +/-5%; (unless otherwise stated)
PARAMETER
SYMBOL
CONDITIONS
Current Source Output
Impedance
Z_O
V_O = V_X
Output High Voltage
Output High Current
Rise Time¹
Differential Crossover
Voltage¹
Duty Cycle¹
Skew¹, CPU to CPU
Jitter, Cycle-to-cycle¹
Notes:
V_OH
I_OH
t_r
V_X
d_t
t_sk
t_jcyc-cyc
V_R = 475W +1%; IREF= 2.32mA;
I_OH = 6*IREF
V_OL = 20%, V_OH = 80%
V_T = 50%
V_T = 50%
V_T = V_X
1 - Guaranteed by design, not 100% tested in production.
MIN
3000
TYP
0.81
-13.92
175 270
45
50
45 50.2
55
81
MAX
1.2
700
55
55
150
200
UNITS
Ohm
V
mA
ps
%
%
ps
ps
Electrical Characteristics- CPUCLKT/C_CS
T_A = 0 - 70°C; V_DD =2.5 V +/-5%; C_L = 20 pF (unless otherwise stated)
PARAMETER
SYMBOL
CONDITIONS
Output High Voltage
V_OH2B
I_OH = -12.0 mA
Output Low Voltage
V_OL2B
I_OL = 12 mA
Output High Current
I_OH2B
V_OH = 1.7 V
Output Low Current
I_OL2B
V_OL = 0.7 V
Rise Time
t_r2B ¹
V_OL = 0.4 V, V_OH = 2.0 V
Differential Crossover
Voltage¹
V_X
Duty Cycle
d_t2B ¹
V_T = 1.25 V
Skew
t_sk2B ¹
V_T = 1.25 V
Jitter, Cycle-to-cycle
t_{jcy c-cy c2B} ¹ VT = 1.25 V
Jitter, One Sigma
t_j1s2B ¹
V_T = 1.25 V
Jitter, Absolute
t_jabs2B ¹
V_T = 1.25 V
1_{Guaranteed by design, not 100% tested in production.}
MIN TYP MAX UNITS
2
V
0.4
V
-19
mA
19
mA
0.89 1.6
ns
45
50
55
%
45
49.6
55
%
175
ps
72
250
ps
150
ps
-250
250
ps
0475G—03/23/04
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