844003 Datasheet, PDF (4/18 Pages) Integrated Device Technology – FemtoClock Crystal-to-3.3V LVDS Frequency Synthesizer

844003 Datasheet
Function Tables
Table 3A. Bank A Frequency Table
Crystal
Frequency (MHz)
31.25
Inputs
DIV_SELA1
0
DIV_SELA0
0
31.25
0
1
31.25
1
0
31.25
1
1
26.041666
0
0
26.041666
0
1
26.041666
1
0
26.041666
1
1
FB_DIV
0
0
0
0
1
1
1
1
Feedback
Divider
20
20
20
20
24
24
24
24
Bank A
Output
Divider
1
2
4
5
1
2
4
5
M/N
QA0, nQA0
Multiplicatio Output Frequency
n Factor
(MHz)
20
625
10
312.5
5
156.25
4
125
24
625
12
312.5
6
156.25
4.8
125
Table 3B. Bank B Frequency Table
Crystal
Frequency (MHz)
31.25
Inputs
DIV_SELB1
0
DIV_SELB0
0
31.25
0
1
31.25
1
0
31.25
1
1
26.041666
0
0
26.041666
0
1
26.041666
1
0
26.041666
1
1
FB_DIV
0
0
0
0
1
1
1
1
Feedback
Divider
20
20
20
20
24
24
24
24
Bank B
Output
Divider
1
2
4
5
1
2
4
5
M/N
QB[1:0], nQB[1:0]
Multiplicatio Output Frequency
n Factor
(MHz)
20
625
10
312.5
5
156.25
4
125
24
625
12
312.5
6
156.25
4.8
125
©2016 Integrated Device Technology, Inc.
4
January 29, 2016