84021 Data Sheet

260MHz, CRYSTAL-TO-LVCMOS/LVTTL FREQUENCY SYNTHESIZER

84021 Rev E 9/23/15

5

©2015 Integrated Device Technology, Inc

Table 3B. Programmable VCO Frequency Function Table(NOTE 1)

NOTE 1: These M divide values and the resulting frequencies correspond to TEST_CLK or crystal frequency of 25MHz.

Table 3C. Programmable Output Divider Function Table (PLL Enabled)

Table 3D. Commonly Used Configuration Function Table

Table 3E. Output Enable & Clock Enable Function Table

VCO Frequency

(MHz)

M Divide

256

128

64

32

16

8421

M8

M7

M6

M5

M4

M3

M2

M1

M0

625

25

0

0

0011001

•

•

•

•

•••••••

700

28

0

0

0011100

•

•

•

•

•••••••

775

31

0

0

0011111

Inputs

N Divider Value

Output Frequency (MHz)

N1

N0

Minimum

Maximum

0

0

3

206.7

260

0

1

4

155

195

1

0

5

124

156

1

1

6

103.3

130

Inputs

Output Frequency (MHz)

Crystal (MHz)

M Divider Value

N Divider Value

Minimum

19.44

32

4

155.52

19.53125

32

4

156.25

25

25

4

156.25

25

25

5

125

25.50

25

3

212.50

25.50

25

4

159.375

25.50

25

6

106.25

38.88

16

4

155.52

Control Inputs

Output

OE0

OE1

Q0

Q1

0

0

Hi-Z

Hi-Z

0

1

Hi-Z

Enabled

1

0

Enabled

Hi-Z

1

1

Enabled

Enabled