ICS950208 Datasheet, PDF (14/19 Pages) Integrated Circuit Systems – Programmable Timing Control Hub for P4

Integrated
Circuit
Systems, Inc.
ICS950208
Electrical Characteristics - CPUCLKT/C
T_A = 0 - 70°C; VDD=3.3V +/-5%; C_L = 10-20 pF (unless otherwise specified)
PARAMETER
SYMBOL
CONDITIONS
MIN
Current Source Output
Zo
Impedance
Vo = Vx
3000
Output High Voltage
V_OH
V_R = 475Ω +1%; IREF =
Output High Current
I_OH
2.32mA; I_OH = 6*IREF
Rise Time¹
t_r
V_OL = 0.175V, V_OH = 0.525 V
175
Fall Time¹
t_f
V_OH = 0.525 V, V_OL = 0.175 V
175
Duty Cycle¹
d_t
V_T = 50%
45
Differential Crossover
Voltage¹
Vx
Note 3
280
Skew¹
t_sk
V_T = 50%
Jitter, Cycle-to-cycle1 tjcyc-cyc
V_T = V_x
1_{Guaranteed by design, not 100% tested in production.}
TYP MAX
1.08 1.2
-14.81
328 700
312 700
50
55
290 430
35 100
100 150
UNITS
Ω
V
mA
ps
ns
%
mV
ps
ps
Electrical Characteristics - PCICLK
TA = 0 - 70°C; VDD = 3.3V +/-5%; CL= 10- 30pF (unless otherwise stated)
PARAMETER
SYMBOL
CONDITIONS
MIN
Output Frequency
F01
Output Impedance
R_DSN1
VO = VDD*(0.5)
12
Output High Voltage
V_OH1
I_OH = -1mA
2.4
Output Low Voltage
V_OL1
I_OL = -1mA
Output High Current
I_OH1
V_OH =1.0V
V_OH =3.135V
-33
Output Low Current
I_OL1
V_OL = 1.95 V
30
V_OL = 0.4V
Rise Time
tr1
V_OL = 0.4V, V_OH =2.4V
0.5
Fall Time
tf1
V_OH = 2.4V, V_OL = 0.4V
0.5
Duty Cycle
dt1
V_T = 1.5V
45
Skew
tsk1
V_T = 1.5V
Jitter
tjcyc-cyc
V_T = 1.5V
1 _{Guaranteed by design,not 100% tested in production}
TYP
33.33
MAX
55
0.55
-33
UNITS
MHz
Ω
V
V
mA
mA
38
1.94 2
ns
1.78 2
ns
51.9 55
%
133 500 ps
225 250 ps
0464B—08/04/03
14