SY89425 Micrel Semiconductor, SY89425 Datasheet - Page 5

• Manufacturer Part Number: SY89425
• Description: DUAL SONET OC-12 CLOCK SYNTHESIZER
• Manufacturer: Micrel Semiconductor

V
Micrel
CCA
Reference Clock (RFCK)
Frequency Tolerance
AC ELECTRICAL CHARACTERISTICS
TIMING WAVEFORMS
DC ELECTRICAL CHARACTERISTICS — TTL
VCO Center Frequency
Reference Clock (RFCK) Input Duty Cycle
Acquisition Lock Time
TTL Output Rise/Fall Time
PECL Output Rise/Fall Time
CK622 Output Duty Cycle
tRST – RST pulse width
tp622 Static Phase Offset of CK622
= V
CCB
= V
CCOA
Parameter
CK622
Output
RFCK
Input
=V
CCOB
= +5V 5%; GND = 0V; T
Min.
45
45
—
—
—
—
—
—
—
1
tp 622
A
622.08 1%
= 0 C to 85 C
5
Typ.
–0.7
—
—
—
—
—
—
20
20
10
Max.
500
55
15
55
—
—
—
—
—
2
% of UI
% of UI
Units
MHz
ppm
ppm
ppm
sec
ns
ps
sec
ns
10% to 90% of amplitude, 15pF load
10% to 90%, 50 load, 5pF cap
Condition
77.76MHz
51.84MHz
38.88MHz
Nominal
ClockWorks™
SY89425