ICS840021I Datasheet, PDF (4/11 Pages) Integrated Circuit Systems – FEMTOCLOCKS™ CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER

Integrated
Circuit
Systems, Inc.
TABLE 5. CRYSTAL CHARACTERISTICS
Parameter
Mode of Oscillation
Frequency
Equivalent Series Resistance (ESR)
Shunt Capacitance
Drive Level
ICS840021I
FEMTOCLOCKS™ CRYSTAL-TO-
LVCMOS/LVTTL CLOCK GENERATOR
Test Conditions
Minimum Typical Maximum
Fundamental
25
50
7
1
Units
MHz
Ω
pF
mW
TABLE
6A.
AC
CHARACTERISTICS,
V
DD
=
V
DDA
=
3.3V±5%,
TA
=
-40°C
TO
85°C
Symbol Parameter
Test Conditions
f_OUT
tjit(Ø)
t_R / t_F
odc
Output Frequency
RMS Phase Jitter
(Random); NOTE 1
Output Rise/Fall Time
Output Duty Cycle
Integration Range: 1.875MHz to 20MHz
20% to 80%
NOTE 1: Please refer to the Phase Noise Plot.
Minimum Typical Maximum Units
125
MHz
0.48
ps
200
500
ps
48
52
%
TABLE 6A. AC CHARACTERISTICS, V_DD = V_DDA = 2.5V±5%, TA = -40°C TO 85°C
Symbol Parameter
Test Conditions
f_OUT
tjit(Ø)
t_R / t_F
odc
Output Frequency
RMS Phase Jitter
(Random); NOTE 1
Output Rise/Fall Time
Output Duty Cycle
Integration Range: 1.875MHz to 20MHz
20% to 80%
NOTE 1: Please refer to the Phase Noise Plot.
Minimum Typical Maximum Units
125
MHz
0.50
ps
250
550
ps
48
52
%
840021AGI
www.icst.com/products/hiperclocks.html
4
REV. A MAY 19, 2005