
ICS843001AGI-22 REVISION B JUNE 25, 2009
8
2009 Integrated Device Technology, Inc.
ICS843001I-22 Data Sheet
FEMTOCLOCK CRYSTAL/LVCMOS-TO-3.3V, 2.5V LVPECL FREQUENCY SYNTHESIZER
Table 7B. AC Characteristics, VCC = VCCO_LVCMOS = VCCO_LVPECL = 2.5V ± 5%, VEE = 0V, TA = -40°C to 85°C
NOTE: Electrical parameters are guaranteed over the specified ambient operating temperature range, which is established when the device is
mounted in a test socket with maintained transverse airflow greater than 500 lfpm. The device will meet specifications after thermal equilibrium
has been reached under these conditions.
NOTE 1: Phase jitter measured using a crystal interface.
Symbol
Parameter
Test Conditions
Minimum
Typical
Maximum
Units
fOUT
Output Frequency
49
640
MHz
tjit()
RMS Phase Jitter, (Random);
NOTE 1
125MHz,
(1.875MHz – 20MHz)
0.50
ps
fVCO
PLL VCO Lock Range
490
640
MHz
tR / tF
Output
Rise/Fall Time
Q/nQ
20% to 80%
200
500
ps
REF_OUT
20% to 80%
300
800
ps
odc
Output Duty Cycle
Q/nQ
45
55
%
REF_OUT
≤ 250MHz
44
56
%