FEMTOCLOCK® LVCMOS/CRYSTAL-TO-3.3V, 2.5V LVPECL
FREQUENCY SYNTHESIZER
5 Rev B 12/9/14
843004I DATA SHEET
AC Electrical Characteristics
Table 5A. AC Characteristics, V
CC
= V
CCA
= V
CCO
= 3.3V ± 5%, V
EE
= 0V, T
A
= -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: Defined as skew between outputs at the same supply voltage and with equal load conditions. Measured at the differential cross
points.
NOTE 2: This parameter is defined in accordance with JEDEC Standard 65.
NOTE 3: Please refer to the Phase Noise Plots.
Table 5B. AC Characteristics, V
CC
= V
CCA
= V
CCO
= 2.5V ± 5%, V
EE
= 0V, T
A
= -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: Defined as skew between outputs at the same supply voltage and with equal load conditions. Measured at the differential cross
points.
NOTE 2: This parameter is defined in accordance with JEDEC Standard 65.
Symbol Parameter Test Conditions Minimum Typical Maximum Units
f
OUT
Output Frequency Range
F_SEL[1:0] = 00 186.67 226.66 MHz
F_SEL[1:0] = 01 140 170 MHz
F_SEL[1:0] = 10 93.33 113.33 MHz
F_SEL[1:0] = 11 46.67 56.66 MHz
tsk(o) Output Skew; NOTE 1, 2 50 ps
tjit(Ø)
RMS Phase Jitter, (Random);
NOTE 3
212.5MHz, (2.55MHz – 20MHz) 0.47 ps
159.375MHz, (1.875MHz – 20MHz) 0.52 ps
156.25MHz, (1.875MHz – 20MHz) 0.52 ps
106.25MHz, (637kHz – 5MHz) 0.62 ps
53.125MHz, (637kHz – 50MHz) 0.67 ps
t
R
/ t
F
Output Rise/Fall Time 20% to 80% 300 600 ps
odc Output Duty Cycle
F_SEL[1:0] 00 49 51 %
F_SEL[1:0] = 00 42 58 %
Symbol Parameter Test Conditions Minimum Typical Maximum Units
f
OUT
Output Frequency Range
F_SEL[1:0] = 00 186.67 226.66 MHz
F_SEL[1:0] = 01 140 170 MHz
F_SEL[1:0] = 10 93.33 113.33 MHz
F_SEL[1:0] = 11 46.67 56.66 MHz
tsk(o) Output Skew; NOTE 1, 2 50 ps
tjit(Ø) RMS Phase Jitter, (Random)
212.5MHz, (2.55MHz – 20MHz) 0.49 ps
159.375MHz, (1.875MHz – 20MHz) 0.52 ps
156.25MHz, (1.875MHz – 20MHz) 0.52 ps
106.25MHz, (637kHz – 5MHz) 0.65 ps
53.125MHz, (637kHz – 50MHz) 0.71 ps
t
R
/ t
F
Output Rise/Fall Time 20% to 80% 300 600 ps
odc Output Duty Cycle
F_SEL[1:0] 00 48 52 %
F_SEL[1:0] = 00 42 58 %
