Micrel, Inc.
Precision Edge®
SY89426
AC ELECTRICAL CHARACTERISTICS(1)
VCC = VCCO = +5V ± 5%; GND = 0V; TA = –40°C to 85°C
Parameter
VCO Center Frequency
Reference Clock (RFCK)
Frequency Tolerance
Reference Clock (RFCK) Input Duty Cycle
Reference Clock (RETRFCK) Output Duty Cycle
Acquisition Lock Time
TTL Output Rise/Fall Time
PECL Output Rise/Fall Time
CK622 Output Duty Cycle
CK155 Output Duty Cycle
tRST – RST pulse width
tp622 Static Phase Offset of CK622
tp155 Static Phase Offset of CK155
tpREF Static Phase Offset of RETRFCK
NOTE:
1. Airflow greater than 500lfpm is maintained.
Min. Typ. Max.
622.08 ±1%
— ±20
—
— ±20
—
— ±10
—
45
—
55
40
—
60
—
—
15
—
—
2
—
—
500
45
—
55
45
—
55
1
—
—
190 400
600
–250 –400 –750
— +3.5
—
Units
MHz
ppm
ppm
ppm
% of UI
% of UI
µsec
ns
ps
% of UI
% of UI
µsec
ps
ps
ns
Condition
Nominal
77.76MHz
51.84MHz
38.88MHz
15pF load
10% to 90% of amplitude, 15pF load
10% to 90%, 50Ω load, 5pF cap
DTICMIENLGEWCATVREICFOARLMCHARACTERISTICS — TTL
RFCK
Input
CK622
Output
RETRFCK
Output
CK155
Output
tp 622
tp REF
tp 155(1)
NOTE:
1.
Does not apply to 52MHz reference
M9999-112105
hbwhelp@micrel.com or (408) 955-1690
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