844S012 Datasheet, PDF (4/24 Pages) Integrated Device Technology – Crystal-to-LVDS/LVCMOS Frequency Synthesizer

844S012 Data Sheet
CRYSTAL-TO-LVDS/LVCMOS FREQUENCY SYNTHESIZER
Table 2. Pin Characteristics
Symbol
Parameter
C_IN
Input Capacitance
C_PD
Power Dissipation
Capacitance
QB[0:6], QC
R_PULLUP
Input Pullup Resistor
R_PULLDOWN Input Pulldown Resistor
R_OUT
Output Impedance
QB[0:6], QC
REF_OUT[0:1]
Test Conditions
V_DDOB, V_DDOC = 3.465V
V_DDOB, V_DDOC = 3.3V
V_DDOB, V_DDOC = 3.3V
Minimum
Typical
2
4
51
51
18
23
Maximum
Units
pF
pF
k
k


Function Tables
Table 3A. F_SELA[1:0] Frequency Select Function Table
Inputs
F_SELA1
F_SELA0
M Divider Value
NA Divider Value
0
0
80
20
0
1
80
16
1
0
80
10
1
1
80
8
Output Frequency (25MHz Reference)
QA[0:1], nQA[0:1] – (MHz)
100 (default)
125
200
250
Table 3B. F_SELB[2:0] Frequency Select Function Table
Inputs
F_SELB2
F_SELB1
F_SELB0
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
NB Divider Value
60
40
30
20
16
15
12
10
Output Frequency (25MHz Reference)
QB[0:6] – (MHz)
33.33 (default)
50
66.67
100
125
133.33
166.67
200
844S012 REVISION B 08/25/15
4
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