
ICS844251-14
FEMTOCLOCK CRYSTAL-TO-LVDS CLOCK GENERATOR
IDT / ICS LVDS CLOCK GENERATOR
5
ICS844251BG-14 REV. A NOVEMBER 19, 2012
AC Electrical Characteristics
Table 5A. AC Characteristics, VDD = 3.3V ± 5%, TA = 0°C to 70°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: Please refer to Phase Noise Plots.
Table 5B. AC Characteristics, VDD = 2.5V ± 5%, TA = 0°C to 70°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: Please refer to Phase Noise Plots.
Parameter
Symbol
Test Conditions
Minimum
Typical
Maximum
Units
fOUT
Output Frequency
FREQ_SEL = 0
145
187.5
MHz
FREQ_SEL = 1
580
750
MHz
tjit()
RMS Phase Jitter,
Random; NOTE 1
156.25MHz, Integration Range:
1.875MHz – 20MHz
0.53
ps
625MHz, Integration Range:
1.875MHz – 20MHz
0.45
ps
tR / tF
Output Rise/Fall Time
20% to 80%
70
550
ps
odc
Output Duty Cycle
FREQ_SEL = 0
48
52
%
FREQ_SEL = 1
46
54
%
Parameter
Symbol
Test Conditions
Minimum
Typical
Maximum
Units
fOUT
Output Frequency
FREQ_SEL = 0
145
187.5
MHz
FREQ_SEL = 1
580
750
MHz
tjit()
RMS Phase Jitter,
Random; NOTE 1
156.25MHz, Integration Range:
1.875MHz – 20MHz
0.54
ps
625MHz, Integration Range:
1.875MHz – 20MHz
0.45
ps
tR / tF
Output Rise/Fall Time
20% to 80%
70
550
ps
odc
Output Duty Cycle
FREQ_SEL = 0
48
52
%
FREQ_SEL = 1
46
54
%