ICS951413 Datasheet, PDF (18/23 Pages) Integrated Circuit Systems – Programmable System Clock Chip for ATI RS400 P4-based Systems

Integrated
Circuit
Systems, Inc.
ICS951413
Electrical Characteristics - PCICLK/PCICLK_F
T_A = 0 - 70°C; V_DD = 3.3 V +/-5%; C_L = 10-20 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
Clock period
T_period
33.33MHz output nominal
33.33MHz output spread
29.9910
29.9910
30.0090 ns 2
30.1598 ns 2
Output High Voltage
V_OH
Output Low Voltage
V_OL
Output High Current
I_OH
Output Low Current
I_OL
I_OH = -1 mA
2.4
I_OL = 1 mA
V _OH @MIN = 1.0 V
-33
V_OH@ MAX = 3.135 V
V_OL @ MIN = 1.95 V
30
V_OL @ MAX = 0.4 V
V
1
0.55
V
1
mA 1
-33 mA 1
mA 1
38 mA 1
Edge Rate
Rising edge rate
1
4 V/ns 1
Edge Rate
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
Jitter
t_jcyc-cyc
V_T = 1.5 V
250 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}
Electrical Characteristics - 48MHz, USB
T_A = 0 - 70°C; V_DD = 3.3 V +/-5%; C_L = 10-20 pF (unless otherwise specified)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS Notes
Long Accuracy
Clock period
Output High Voltage
Output Low Voltage
Output High Current
Output Low Current
Edge Rate
ppm
T_period
V_OH
V_OL
I_OH
I_OL
see Tperiod min-max values
48.00MHz output nominal
I_OH = -1 mA
I_OL = 1 mA
V _OH @ MIN = 1.0 V
V_OH@ MAX = 3.135 V
V_OL @MIN = 1.95 V
V_OL @ MAX = 0.4 V
Rising edge rate
-100
20.8313
2.4
-33
30
1
100 ppm 1,2
20.8354 ns 2
V
1
0.55
V
1
mA 1
-33 mA 1
mA 1
38 mA 1
2
V/ns 1
Edge Rate
Falling edge rate
1
2
V/ns 1
Rise Time
t_r1
V_OL = 0.4 V, V_OH = 2.4 V
1
2
ns 1
Fall Time
t_f1
V_OH = 2.4 V, V_OL = 0.4 V
1
2
ns 1
Duty Cycle
d_t1
V_T = 1.5 V
45
55
%1
Jitter, Cycle to cycle
t_jcyc-cyc
V_T = 1.5 V
175 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}
0929C—03/07/05
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