ICS843004-01 Datasheet, PDF (4/15 Pages) Integrated Circuit Systems – FEMTOCLOCKS-TM CRYSTAL-TO- 3.3V LVPECL FREQUENCY SYNTHESIZER

Integrated
Circuit
Systems, Inc.
ICS843004-01
FEMTOCLOCKS™ CRYSTAL-TO-
3.3V LVPECL FREQUENCY SYNTHESIZER
TABLE 4. CRYSTAL CHARACTERISTICS
Parameter
Mode of Oscillation
Frequency
Equivalent Series Resistance (ESR)
Test Conditions
Shunt Capacitance
NOTE: Characterized using an 18pF parallel resonant crystal.
Minimum Typical Maximum
Fundamental
25
50
7
Units
MHz
Ω
pF
TABLE 5.
AC
CHARACTERISTICS,
V
CC
=
V
CCA
=
V
CCO
= 3.3V±5%, TA = -30°C TO 85°C
Symbol Parameter
Test Conditions
Minimum Typical Maximum Units
F_SEL[1:0] = 00
140
170
MHz
f_OUT
Output Frequency
F_SEL[1:0] = 01
112
F_SEL[1:0] =10
56
136
MHz
68
MHz
tsk(o) Output Skew; NOTE 1, 2
30
ps
156.25MHz (1.875MHz - 20MHz)
0.57
ps
tjit(Ø) RMS Phase Jitter; NOTE 3
125MHz (1.875MHz - 20MHz)
0.63
ps
62.5MHz (1.875MHz - 20MHz)
0.81
ps
t_R / t_F
odc
Output Rise/Fall Time
Output Duty Cycle
20% to 80%
300
49
600
ps
51
%
NOTE 1: Defined as skew between outputs at the same supply voltages and with equal load conditions.
Measured at V_CCO/2.
NOTE 2: This parameter is defined in accordance with JEDEC Standard 65.
NOTE 3: Phase jitter is dependent on the input source used.
843004AG-01
www.icst.com/products/hiperclocks.html
4
REV. B MAY 6, 2005