ICS843003 Datasheet, PDF (6/17 Pages) Integrated Circuit Systems – FEMTOCLOCKS CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER

Integrated
Circuit
Systems, Inc.
ICS843003
FEMTOCLOCKS™CRYSTAL-TO-3.3V LVPECL
FREQUENCY SYNTHESIZER
TABLE 4C. LVPECL DC CHARACTERISTICS, V_CC = V_CCA = V_{CCO_A} = V_{CCO_B} = 3.3V±5%, TA = 0°C TO 70°C
Symbol Parameter
Test Conditions
Minimum Typical
V_OH
Output High Voltage; NOTE 1
V_OL
Output Low Voltage; NOTE 1
V_SWING Peak-to-Peak Output Voltage Swing
NOTE 1: Outputs terminated with 50Ω to V_CCO - 2V.
V_CCO - 1.4
V_CCO - 2.0
0.6
Maximum
V_CCO - 0.9
V_CCO - 1.7
1.0
Units
V
V
V
TABLE 5. CRYSTAL CHARACTERISTICS
Parameter
Test Conditions
Mode of Oscillation
Frequency
FB_DIV = ÷20
FB_DIV = ÷24
Equivalent Series Resistance (ESR)
Shunt Capacitance
NOTE: Characterized using an 18pF parallel resonant crystal.
Minimum Typical Maximum
Fundamental
28
31.25
35
23.33 26.04166 29.167
50
7
Units
MHz
MHz
Ω
pF
TABLE 6.
AC
CHARACTERISTICS,
V=
CC
V
CCA
=
V
CCO_A
=
V
CCO_B
=
3.3V±5%,
TA
=
0°C
TO
70°C
Symbol Parameter
Test Conditions
Minimum Typical Maximum
DIV_SELx[1:0] = 00
560
700
DIV_SELx[1:0] = 01
280
350
f_OUT
Output Frequency Range
DIV_SELx[1:0] = 10
140
175
DIV_SELx[1:0] = 11
112
140
tsk(b) Bank Skew, NOTE 1
20
Outputs @ Same Frequency
35
tsk(o) Output Skew; NOTE 2, 4
Outputs @ Different Frequencies
100
625MHz (1.875MHz - 20MHz)
0.42
tjit(Ø)
RMS Phase Jitter (Random);
NOTE 3
312.5MHz (1.875MHz - 20MHz)
156.25MHz (1.875MHz - 20MHz)
0.50
0.51
125MHz (1.875MHz - 20MHz)
0.52
t_R / t_F
Output Rise/Fall Time
20% to 80%
250
600
odc
Output Duty Cycle
DIV_SELx[1:0] = 00
40
60
DIV_SELx[1:0] ≠ 00
47
53
NOTE 1: Defined as skew winthin a bank of outputs at the same voltages and with equal load conditions.
NOTE 2: Defined as skew between outputs at the same supply voltages and with equal load conditions.
Measured at the output differential cross points.
NOTE 3: Please refer to the Phase Noise Plots.
NOTE 4: This parameter is defined in accordance with JEDEC Standard 65.
Units
MHz
MHz
MHz
MHz
ps
ps
ps
ps
ps
ps
ps
ps
%
%
843003AG
www.icst.com/products/hiperclocks.html
6
REV. A JULY 27, 2004