844S012 Datasheet, PDF (5/24 Pages) Integrated Device Technology – Crystal-to-LVDS/LVCMOS Frequency Synthesizer

844S012 Data Sheet
CRYSTAL-TO-LVDS/LVCMOS FREQUENCY SYNTHESIZER
Table 3C. F_SELC[2:0] Frequency Select Function Table
Inputs
F_SELC2
F_SELC1
F_SELC0
M Divider Value
0
0
0
80
0
0
1
80
0
1
0
80
0
1
1
80
1
0
0
80
1
0
1
80
1
1
0
80
1
1
1
80
NC Divider Value
60
40
30
20
16
15
12
10
Output Frequency (25MHz Reference)
QC – (MHz)
33.33 (default)
50
66.67
100
125
133.33
166.67
200
Table 3D. SSC_SEL[1:0] Function Table
Inputs
SSC1
SSC0
Mode
0
0
0 to -0.6% Down-spread
0
1
±0.25% Center-spread
1
0
±0.25% Center-spread
1
1
SSC Off (default)
Table 3E. REF_SEL Function Table
Input
REF_SEL
Input Reference
0 (default)
XTAL
1
REF_IN
Table 3F. REF_OE Function Table
Input
REF_OE Function
0 (default) REF_OUT[0:1] - Disabled (High-Impedance)
1
REF_OUT[0:1] - Enabled
844S012 REVISION B 08/25/15
5
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