ICS951412 Datasheet, PDF (14/19 Pages) Integrated Circuit Systems – System Clock Chip for ATI RS480 K8-based Systems

ICS951412
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
δV/δt
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
-200
20.8257
2.4
-33
30
1
200 ppm 1,2
20.8340 ns 2
V
1
0.55 V
1
mA 1
-33 mA 1
mA 1
38 mA 1
2 V/ns 1
Edge Rate
δV/δt
Falling edge rate
1
2 V/ns 1
Rise Time
t_r1
V_OL = 0.4 V, V_OH = 2.4 V
1 1.43 2
ns 1
Fall Time
t_f1
V_OH = 2.4 V, V_OL = 0.4 V
1 1.33 2
ns 1
Duty Cycle
d_t1
V_T = 1.5 V
45 48 55
%
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
14