ICS951412 Datasheet, PDF (13/19 Pages) Integrated Circuit Systems – System Clock Chip for ATI RS480 K8-based Systems

ICS951412
Electrical Characteristics - PCI33, HTT66 Clocks
T_A = 0 - 70°C; VDD=3.3V +/-5%; C_L = 30 pF (unless otherwise specified)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS NOTES
Long Accuracy
ppm
see Tperiod min-max values
-300
300 ppm 1,2
PCI33 Clock period
T_period
33.33MHz output nominal
33.33MHz output spread
29.9910
29.9910
30.0090 ns
30.1598 ns
2
2
HTT66 Clock period T_period
66.67MHz output nominal
66.67MHz output spread
14.9955
14.9955
15.0045 ns
15.0799 ns
2
2
Output High Voltage
V_OH
I_OH = -1 mA
2.4
Output Low Voltage
V_OL
I_OL = 1 mA
Output High Current
I_OH
V _OH @MIN = 1.0 V
V_OH@ MAX = 3.135 V
-33
Output Low Current
I_OL
V_OL @ MIN = 1.95 V
V_OL @ MAX = 0.4 V
30
V
1
0.55 V
1
mA
1
-33 mA
1
mA
1
38 mA
1
Edge Rate
δV/δt
Rising edge rate
1
4
V/ns
1
Edge Rate
δV/δt
Falling edge rate
1
4
V/ns
1
Rise Time
t_r1
V_OL = 0.4 V, V_OH = 2.4 V
0.5
2
ns
1
Fall Time
t_f1
V_OH = 2.4 V, V_OL = 0.4 V
0.5
2
ns
1
Duty Cycle
d_t1
V_T = 1.5 V
45
55
%
1
Skew
t_sk1
V_T = 1.5 V
500 ps
1
Jitter, Cycle to cycle t_jcyc-cyc
V_T = 1.5 V
180 ps
1
1_{Guaranteed by design and characterization, not 100% tested in production.}
2 _{All Long Term Accuracy and Clock Period specifications are guaranteed with the assumption that REF}
is at 14.31818MHz
0883G—12/08/04
13