ICS951464 Datasheet, PDF (18/24 Pages) Integrated Device Technology – Programmable System Clock Chip for ATI RS/RD690 K8TM - based Systems

ICS951464
IDT^TM/ICST^M Programmable System Clock Chip for ATI RS/RD690 K8^TM - based Systems
Electrical Characteristics - USB - 48MHz
PARAMETER
SYMBOL
CONDITIONS*
MIN
TYP
MAX UNITS NOTES
Long Accuracy
ppm see Tperiod min-max values -100
100
ppm 1,2
Clock period
T_period
48.00MHz output nominal 20.8229
20.8344 ns
2
Clock Low Time
T_low
Measure from < 0.6V
9.3750
11.4580 ns
2
Clock High Time
T_high
Measure from > 2.0V
9.3750
11.4580 ns
2
Output High Voltage
V_OH
I_OH = -1 mA
2.4
V
1
Output Low Voltage
V_OL
I_OL = 1 mA
0.55
V
1
Output High Current
I_OH
V _OH @MIN = 1.0 V
-33
V_OH@MAX = 3.135 V
mA
1
-33
mA
1
Output Low Current
I_OL
V_OL @ MIN = 1.95 V
V_OL @ MAX = 0.4 V
30
mA
1
38
mA
1
Rise Time
t_{r_USB}
V_OL = 0.4 V, V_OH = 2.4 V
0.5
1.5
ns
1
Fall Time
t_{f_USB}
V_OH = 2.4 V, V_OL = 0.4 V
0.5
1.5
ns
1
Duty Cycle
d_t1
V_T = 1.5 V
45
55
%
1
Group Skew
Jitter, Cycle to cycle
t_skew
t_jcyc-cyc
V_T = 1.5 V
V_T = 1.5 V
100
ps
1
130
ps
1,2
*TA = 0 - 70°C; Supply Voltage VDD = 3.3 V +/-5%, CL = 5 pF with Rs = 22Ω (unless otherwise specified)
1_{Guaranteed by design and characterization, not 100% tested in production.}
2_{ICS recommended and/or chipset vendor layout guidelines must be followed to meet this specification}
Electrical Characteristics - REF-14.318MHz
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX UNITS Notes
Long Accuracy
ppm see Tperiod min-max values -100
100
ppm 1,2
Clock period
T_period
14.318MHz output nominal 69.8270
69.8550 ns
2
Clock Low Time
T_low
Measure from < 0.6V
30.9290
37.9130 ns
2
Clock High Time
T_high
Measure from > 2.0V
30.9290
37.9130 ns
2
Output High Voltage
V_OH
I_OH = -1 mA
2.4
V
1
Output Low Voltage
V_OL
I_OL = 1 mA
0.4
V
1
Output High Current
I_OH
V_OH @MIN = 1.0 V,
-29
V_OH@MAX = 3.135 V
-23
mA
1
Output Low Current
I_OL
V_OL @MIN = 1.95 V,
V_OL @MAX = 0.4 V
29
27
mA
1
Rise Time
t_r1
V_OL = 0.4 V, V_OH = 2.4 V
1.5
ns
1
Fall Time
t_f1
V_OH = 2.4 V, V_OL = 0.4 V
1.5
ns
1
Skew
t_sk1
V_T = 1.5 V
100
ps
1
Duty Cycle
d_t1
V_T = 1.5 V
44
53
56
%
1
Jitter
t_jcyc-cyc
V_T = 1.5 V
200
300
ps
1
*TA = 0 - 70°C; Supply Voltage VDD = 3.3 V +/-5%, CL = 5 pF with Rs = 22Ω (unless otherwise specified)
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}
IDT^TM/ICST^M Programmable System Clock Chip for ATI RS/RD690 K8^TM - based Systems
18
1211B—09/17/09