ICS8761I Datasheet, PDF (4/16 Pages) Integrated Device Technology – LOW VOLTAGE, LOW SKEW, PCI / PCI-X CLOCK GENERATOR

ICS8761I
LOW VOLTAGE, LOW SKEW,
PCI / PCI-X CLOCK GENERATOR
TABLE 3D. CONTROL FUNCTION TABLE
D_SELx1
0
D_SELx0
0
Inputs
FBDIV_SEL1 FBDIV_SEL0
0
0
Reference
Frequency Range
(MHz)
41.6 - 83.33
PLL_SEL =1
Outputs
Frequency
QX0:QX3
QX0:QX3
(MHz)
FB_OUT
(MHz)
x2
83.33 - 166.67 41.6 - 83.33
0
0
0
1
20.83 - 41.67
x4
83.33 - 166.67 20.83 - 41.67
0
0
1
0
15.62 - 31.25
x 5.33
83.33 - 166.67 15.62 - 31.25
0
0
1
1
12.5 - 25
x 6.67
83.33 - 166.67 12.5 - 25
0
1
0
0
41.6 - 83.33
x 1.5
62.4 - 125 41.6 - 83.33
0
1
0
1
20.83 - 41.67
x3
62.4 - 125 20.83 - 41.67
0
1
1
0
15.62 - 31.25
x4
62.4 - 125 15.62 - 31.25
0
1
1
1
12.5 - 25
x5
62.4 - 125
12.5 - 25
1
0
0
0
41.6 - 83.33
x1
41.6 - 83.33 41.6 - 83.33
1
0
0
1
20.83 - 41.67
x2
41.6 - 83.33 20.83 - 41.67
1
0
1
0
15.62 - 31.25
x 2.67
41.6 - 83.33 15.62 - 31.25
1
0
1
1
12.5 - 25
x 3.33
41.6 - 83.33
12.5 - 25
1
1
0
0
41.6 - 83.33
÷2
20.8 - 41.67 41.6 - 83.33
1
1
0
1
20.83 - 41.67
÷1
20.8 - 41.67 20.83 - 41.67
1
1
1
0
15.62 - 31.25
x 1.33
20.8 - 41.67 15.62 - 31.25
1
1
1
1
12.5 - 25
x 1.67
20.8 - 41.67
12.5 - 25
NOTE: D_SELX1 denotes D_SELA1, D_SELB1, D_SELC1, and D_SELD1. D_SELX0 denotes D_SELA0, D_SELB0,
D_SELC0, and D_SELD0. QX0:QX3 denotes QA0:QA3, QB0:QB3, QC0:QC3, and QD0:QD3.
TABLE 3E. CONTROL FUNCTION TABLE (PCI CONFIGURATION)
D_SELx1
0
D_SELx0
0
Inputs
FBDIV_SEL1 FBDIV_SEL0
0
0
Reference Frequency
(MHz)
66.67
Outputs
PLL_SEL = 1
Frequency
QX0:QX3
x2
QX0:QX3
(MHz)
133
FB_OUT
(MHz)
66.67
0
0
0
1
33.33
x4
133
33.33
0
0
1
0
25
x 5.33
133
25
0
0
1
1
20
x 6.67
133
20
0
1
0
0
66.67
x 1.5
100
66.67
0
1
0
1
33.33
x3
100
33.33
0
1
1
0
25
x4
100
25
0
1
1
1
20
x5
100
20
1
0
0
0
66.67
x1
66.67
66.67
1
0
0
1
33.33
x2
66.67
33.33
1
0
1
0
25
x 2.67
66.67
25
1
0
1
1
20
x 3.33
66.67
20
1
1
0
0
66.67
÷2
33.33
66.67
1
1
0
1
33.33
÷1
33.33
33.33
1
1
1
0
25
x 1.33
33.33
25
1
1
1
1
20
x 1.67
33.33
20
NOTE: D_SELx1 denotes D_SELA1, D_SELB1, D_SELC1, and D_SELD1. D_SELx0 denotes D_SELA0, D_SELB0,
D_SELC0, and D_SELD0. QX0:QX3 denotes QA0:QA3, QB0:QB3, QC0:QC3, and QD0:QD3.
8761CYI
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REV. C JULY 27, 2010
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