ICS951464 Datasheet, PDF (16/24 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 - K8 Push Pull Differential Pair
T_A = 0 - 70°C; V_DD = 3.3 V +/-5%; C_L =AMD64 Processor Test Load
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
Rising Edge Rate
Falling Edge Rate
δV/δt
Measured at the AMD64
2
processor's test load. 0 V +/- 400
δV/δt
mV (differential measurement)
2
Differential Voltage
Change in V_{DIFF_DC} Magnitude
Common Mode Voltage
Change in Common Mode
Voltage
Jitter, Cycle to cycle
V_DIFF
∆V_DIFF
V_CM
∆V_CM
t_jcyc-cyc
Measured at the AMD64
processor's test load. (single-
ended measurement)
Measurement from differential
wavefrom. Maximum difference of
cycle time between 2 adjacent
cycles.
0.4
-150
1.05
-200
0
1.25
1.25
50
Jitter, Accumulated
Measured using the JIT2 software
package with a Tek 7404 scope.
t_ja
TIE (Time Interval Error)
measurement technique:
-1000
Sample resolution = 50 ps,
Sample Duration = 10 µs
Duty Cycle
d_t3
Measurement from differential
wavefrom
45
Output Impedance
Average value during switching
R_ON transition. Used for determining
15
35
series termination value.
Group Skew
t_src-skew
Measurement from differential
wavefrom
1_{Guaranteed by design and characterization, not 100% tested in production.}
2 _{All accumulated jitter specifications are guaranteed assuming that REF is at 14.31818MHz}
3 _{Spread Spectrum is off}
MAX
10
UNITS NOTES
V/ns
1
10
V/ns
1
2.3
V
1
150
mV
1
1.45
V
1
200
mV
1
85
ps
1
1000
1,2,3
53
%
1
55
Ω
1
50
ps
1
IDT^TM/ICST^M Programmable System Clock Chip for ATI RS/RD690 K8^TM - based Systems
16
1211B—09/17/09