ICS951464AGLF Datasheet, PDF (17/24 Pages) Integrated Device Technology – Programmable System Clock Chip for ATI RS/RD690 K8™ - based Systems

ICS951464
IDT^TM/ICST^M Programmable System Clock Chip for ATI RS/RD690 K8^TM - based Systems
Electrical Characteristics - HTTCLK Clock
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX UNITS
Long Accuracy
ppm
see Tperiod min-max values
-300
300
ppm
PCI33 Clock period
T_period
33.33MHz output nominal
33.33MHz output spread
29.9910
29.9910
30.0090 ns
30.1598 ns
HTT66 Clock period
T_period
66.67MHz output nominal
66.67MHz output spread
14.9955
14.9955
15.0045 ns
15.0799 ns
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
Edge Rate
δV/δt
Rising edge rate
1
V
0.55
V
mA
-33
mA
mA
38
mA
4
V/ns
Edge Rate
δV/δt
Falling edge rate
1
4
V/ns
Rise Time
Fall Time
Duty Cycle
Jitter, Cycle to cycle
t_r1
V_OL = 0.4 V, V_OH = 2.4 V
0.5
t_f1
V_OH = 2.4 V, V_OL = 0.4 V
0.5
d_t1
V_T = 1.5 V
45
t_jcyc-cyc
V_T = 1.5 V
2
ns
2
ns
55
%
180
ps
*T_A = 0 - 70°C; VDD=3.3V +/-5%; C_L = 30 pF (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 with the assumption that REF is at 14.31818MHz}
Notes
1,2
2
2
2
2
1
1
1
1
1
1
1
1
1
1
1
1
Electrical Characteristics - SRC/ATIG 0.7V Current Mode Differential Pair
PARAMETER
SYMBOL
CONDITIONS*
MIN
TYP
Current Source Output
Impedance
Zo
V_O = V_x
3000
Voltage High
VHigh
Statistical measurement on
660
Voltage Low
VLow
single ended signal
-150
MAX
850
150
Max Voltage
Min Voltage
Vovs Measurement on single ended
Vuds
signal using absolute value.
-300
1150
Crossing Voltage (abs)
Vx(abs)
250
550
Crossing Voltage (var)
d-Vx
Variation of crossing over all
edges
140
Long Accuracy
ppm
see Tperiod min-max values
-300
300
Average period
Tperiod
100.00MHz nominal
100.00MHz spread
9.9970
9.9970
10.0030
10.0533
Absolute min period
Tabsmin 100.00MHz nominal/spread
9.8720
Rise Time
t_r
V_OL = 0.175V, V_OH = 0.525V
175
700
Fall Time
t_f
V_OH = 0.525V V_OL = 0.175V
175
700
Rise Time Variation
d-t_r
V_OL = 0.175V, V_OH = 0.525V
125
Fall Time Variation
d-t_f
V_OH = 0.525V V_OL = 0.175V
125
Duty Cycle
d_t3
Measurement from differential
wavefrom
45
55
Skew
t_sk3
V_T = 50%
100
Jitter, Cycle to cycle
t_jcyc-cyc
Measurement from differential
wavefrom
85
*T_A = 0 - 70°C; V_DD = 3.3 V +/-5%; C_L =2pF, R_S=33.2Ω, R_P=49.9Ω, Ι_REF = 475Ω
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}
3_{IREF = VDD/(3xRR). For RR = 475Ω (1%), IREF = 2.32mA. IOH = 6 x IREF and VOH = 0.7V @ ZO=50Ω.}
UNITS
Ω
mV
mV
mV
mV
mV
mV
ppm
ns
ns
ns
ps
ps
ps
ps
%
ps
ps
Notes
1
1,3
1,3
1
1
1
1
1,2
2
2
1,2
1
1
1
1
1
1
1
IDT^TM/ICST^M Programmable System Clock Chip for ATI RS/RD690 K8^TM - based Systems
17
1211B—09/17/09