ICS9LPRS480 Datasheet, PDF (15/25 Pages) Integrated Device Technology – Programmable System Clock Chip for ATI RS780 - K8TM based Systems

Integrated
Circuit
Systems, Inc.
ICS9LPRS480
Electrical Characteristics - 27MHz
PARAMETER
SYMBOL
CONDITIONS
Long Accuracy
ppm
see Tperiod min-max values
Clock period
T_period
27.000MHz output nominal
Output High Voltage(27SS, 27NSS)
V_OH
I_OH = -1 mA
Output Low Voltage
V_OL
I_OL = 1 mA
Output High Current
I_OH
V_OH = 1.0 V
V_OH = 3.135 V
Output Low Current
I_OL
V_OL = 1.95 V
V_OL = 0.4 V
Edge Rate
t_slewr/f
Rising/Falling edge rate
V_T @ 20%-80%
Duty Cycle
d_t1
V_T = 1.5 V
Jitter
t_ltj
t_jcyc-cyc
Long Term (10us)
V_T = 1.5 V
1_{Guaranteed by design and characterization, not 100% tested in production.}
2 _{Slew rate measured through Vswing centered around differential zero}
3 _{Vxabs is defined as the voltage where CLK = CLK#}
10 _{VDD = 3.3V}
MIN
-50
-15
37.0365
2.1
-29
29
1
45
TYP
2
MAX
50
15
37.0376
0.55
-23
27
4
55
300
200
UNITS
ppm
ns
V
V
mA
mA
mA
mA
NOTES
1,2
1,2,3
2
1,10
1
1,10
1,10
1,10
1,10
V/ns
1
%
1
ps
1
ps
1
Electrical Characteristics - REF-14.318MHz
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
Long Accuracy
ppm
see Tperiod min-max values -300
300
Clock period
T_period
14.318MHz output nominal 69.8270
69.8550
Clock Low Time
T_low
Measure from < 0.6V
30.9290
37.9130
Clock High Time
T_high
Measure from > 2.0V
30.9290
37.9130
Output High Voltage
V_OH
I_OH = -1 mA
2.4
Output Low Voltage
V_OL
I_OL = 1 mA
0.4
Output High Current
I_OH
V_OH @MIN = 1.0 V,
-29
V_OH@MAX = 3.135 V
-23
Output Low Current
I_OL
V_OL @MIN = 1.95 V,
29
V_OL @MAX = 0.4 V
27
Rise Time
t_r1
V_OL = 0.4 V, V_OH = 2.4 V
1
1.5
Fall Time
t_f1
V_OH = 2.4 V, V_OL = 0.4 V
1
1.5
Skew
t_sk1
V_T = 1.5 V
250
Duty Cycle
d_t1
V_T = 1.5 V
45
55
Jitter
t_jcyc-cyc
V_T = 1.5 V
300
*TA = 0 - 70°C; Supply Voltage VDD = 3.3 V +/-5%, CL = 5 pF with Rs = 33Ω (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}
UNITS
ppm
ns
ns
ns
V
V
NOTES
1,2
2
2
2
1
1
mA
1
mA
1
ns
1
ns
1
ps
1
%
1
ps
1
1391D—02/02/09
15