ICS8732-01 Datasheet, PDF (4/17 Pages) Integrated Device Technology – Maximum output frequency

ICS8732-01
LOW VOLTAGE, LOW SKEW
3.3V LVPECL CLOCK GENERATOR
TABLE 3C. CONTROL INPUT FUNCTION TABLE FOR QFB0, QFB1
Inputs
MR PLL_SEL FBDIV_SEL2 FBDIV_SEL1 FBDIV_SEL0
1
X
X
X
X
0
1
0
0
0
0
1
0
0
1
0
1
0
1
0
0
1
0
1
1
0
1
1
0
0
0
1
1
0
1
0
1
1
1
0
0
1
1
1
1
0
0
0
0
0
0
0
0
0
1
0
0
0
1
0
0
0
0
1
1
0
0
1
0
0
0
0
1
0
1
0
0
1
1
0
0
0
1
1
1
Outputs
QFB0, QFB1
nQFB0, nQFB1
Low
fVCO/4
fVCO/6
fVCO/8
fVCO/10
fVCO/8
fVCO/12
fVCO/16
fVCO/20
fREF_CLK/4
fREF_CLK/6
fREF_CLK/8
fREF_CLK/10
fREF_CLK/8
fREF_CLK/12
fREF_CLK/16
fREF_CLK/20
TABLE 4A. QX OUTPUT FREQUENCY W/FB_IN = QFB0 OR QFB1
Inputs
fVCO
FB_IN FBDIV_SEL2
QFB
0
QFB
0
FBDIV_SEL1 FBDIV_SEL0
0
0
0
1
Output Divider Mode
÷4
÷6
CLK1 (MHz)
Minimum Maximum
62.5
175
(NOTE 2)
41.67
116.67
(NOTE 1)
fREF_CLK x 4
fREF_CLK x 6
QFB
0
1
0
÷8
31.25
87.5
fREF_CLK x 8
QFB
0
1
1
÷10
25
70
fREF_CLK x 10
QFB
1
0
0
÷8
31.25
87.5
fREF_CLK x 8
QFB
1
0
1
÷12
20.83
58.33 fREF_CLK x 12
QFB
1
1
0
÷16
15.62
43.75 fREF_CLK x 16
QFB
1
1
1
÷20
12.5
NOTE 1: VCO frequency range is 250MHz to 700MHz.
NOTE 2: The maximum input frequency that the phase detector can accept is 175MHz.
35
fREF_CLK x 20
8732AY-01
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4
REV. E MAY 2, 2013