ICS844251-14 Datasheet, PDF (5/16 Pages) Integrated Device Technology – FEMTOCLOCK™ CRYSTAL-TO-LVDS CLOCK GENERATOR

ICS844251-14
FEMTOCLOCK™CRYSTAL-TO-LVDS CLOCK GENERATOR
AC Electrical Characteristics
Table 5A. AC Characteristics, V_DD = 3.3V ± 5%, T_A = 0°C to 70°C
Parameter Symbol
Test Conditions
f_OUT
Output Frequency
FREQ_SEL = 0
FREQ_SEL = 1
tjit(Ø)
RMS Phase Jitter, Random;
NOTE 1
156.25MHz,
Integration Range: 1.875MHz – 20MHz
625MHz,
Integration Range: 1.875MHz – 20MHz
t_R / t_F
odc
Output Rise/Fall Time
Output Duty Cycle
20% to 80%
FREQ_SEL = 0
FREQ_SEL = 1
Minimum
145
580
Typical Maximum
187.5
750
Units
MHz
MHz
0.53
ps
0.45
ps
70
550
ps
48
52
%
46
54
%
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, V_DD = 2.5V ± 5%, T_A = 0°C to 70°C
Parameter Symbol
Test Conditions
f_OUT
Output Frequency
FREQ_SEL = 0
FREQ_SEL = 1
tjit(Ø)
RMS Phase Jitter, Random;
NOTE 1
156.25MHz,
Integration Range: 1.875MHz – 20MHz
625MHz,
Integration Range: 1.875MHz – 20MHz
t_R / t_F
odc
Output Rise/Fall Time
Output Duty Cycle
20% to 80%
FREQ_SEL = 0
FREQ_SEL = 1
Minimum
145
580
Typical
Maximum
187.5
750
Units
MHz
MHz
0.54
ps
0.45
ps
70
550
ps
48
52
%
46
54
%
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.
IDT™ / ICS™ LVDS CLOCK GENERATOR
5
ICS844251BG-14 REV. A MAY 1, 2009