ics650-44 Integrated Device Technology, ics650-44 Datasheet - Page 8

• Manufacturer Part Number: ics650-44
• Description: Spread Spectrum Clock Synthesizer
• Manufacturer: Integrated Device Technology

IDT™ / ICS™ SPREAD SPECTRUM CLOCK SYNTHESIZER
ICS650-44
SPREAD SPECTRUM CLOCK SYNTHESIZER
Timing Diagrams
O utputs
Output
VDDs
Clock
P D T S
C LK
Figure 5: PDTS to Stable Clock Output Timing
Figure 3: Rise and Fall Time Definitions
0.01µF
Figure 1: Test and Measurement Setup
t
3
GND
t
E N
1.25 V
DUT
1 %
t
4
t
D IS
C
80% of VDDO
20% of VDDO
LOAD
Outputs
VDDO
0V
V O H
1 .25 V
0 V
8
C lo c k
VDD
VDD
0V
0V
Figure 4: Power Up and PLL Lock Timing
0 m s
Figure 6: Short Term Jitter Definition
Power Up
Tim e
Figure 2: Duty Cycle Definitions
4 m s
t
2
VCO Ram p
Tim e
Mean value
Absolute jitter
t
1
10 m s
(p - p)
CLOCK SYNTHESIZER
PLL Locked
ICS650-44
5 0 % o f V D D O
0 V
V D D O
t
JA
REV D 102709