ICS840002-01 Datasheet, PDF (4/12 Pages) Integrated Circuit Systems – FEMTOCLOCKS™ CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER

Integrated
Circuit
Systems, Inc.
ICS840002-01
FEMTOCLOCKS™ CRYSTAL-TO-
LVCMOS/LVTTL FREQUENCY SYNTHESIZER
TABLE 4. CRYSTAL CHARACTERISTICS
Parameter
Test Conditions
Mode of Oscillation
Frequency
Equivalent Series Resistance (ESR)
Shunt Capacitance
Drive Level
NOTE: Characterized using an 18pF parallel resonant crystal.
Minimum Typical Maximum
Fundamental
25
50
7
1
Units
MHz
Ω
pF
mW
TABLE
5A.
AC
CHARACTERISTICS,
V
DD
=
V
DDA
=
V
DDO
=
3.3V±5%,
TA
=
-30°C
TO
85°C
Symbol Parameter
Test Conditions
Minimum Typical
F_SEL[1:0] = 00
140
f_OUT
Output Frequency
F_SEL[1:0] = 01
112
F_SEL[1:0] = 10 or 11
56
tsk(o) Output Skew; NOTE 1, 3
tjit(Ø)
RMS Phase Jitter (Random);
NOTE 2
156.25MHz (1.875MHz - 20MHz)
125MHz (1.875MHz - 20MHz)
62.5MHz (1.875MHz - 20MHz)
0.47
0.57
0.51
t_R / t_F
odc
Output Rise/Fall Time
Output Duty Cycle
20% to 80%
200
46
NOTE 1: Defined as skew between outputs at the same supply voltages and with equal load conditions.
Measured at V_DDO/2.
NOTE 2: Please refer to the Phase Noise Plot.
NOTE 3: This parameter is defined in accordance with JEDEC Standard 65.
Maximum
175
140
70
12
700
54
Units
MHz
MHz
MHz
ps
ps
ps
ps
ps
%
TABLE 5B. AC CHARACTERISTICS, V_DD = V_DDA = 3.3V±5%, V_DDO = 2.5V±5%, TA = -30°C TO 85°C
Symbol Parameter
Test Conditions
Minimum Typical Maximum
F_SEL[1:0] = 00
140
175
f_OUT
Output Frequency
F_SEL[1:0] = 01
112
140
F_SEL[1:0] = 10 or 11
56
68
tsk(o) Output Skew; NOTE 1, 3
12
156.25MHz (1.875MHz - 20MHz)
0.47
tjit(Ø)
RMS Phase Jitter (Random);
NOTE 2
125MHz (1.875MHz - 20MHz)
0.55
62.5MHz (1.875MHz - 20MHz)
0.49
t_R / t_F
odc
Output Rise/Fall Time
Output Duty Cycle
20% to 80%
200
700
46
54
NOTE 1: Defined as skew between outputs at the same supply voltages and with equal load conditions.
Measured at V_DDO/2.
NOTE 2: Please refer to the Phase Noise Plot.
NOTE 3: This parameter is defined in accordance with JEDEC Standard 65.
Units
MHz
MHz
MHz
ps
ps
ps
ps
ps
%
840002AG-01
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4
REV. B JANUARY 13, 2006