CDCM6208 datasheet(47/78 Pages) TI

Part #	CDCM6208

Description	2:8 CLOCK GENERATOR, JITTER CLEANER WITH FRACTIONAL DIVIDERS

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Manufacturer	TI [Texas Instruments]

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REF_SEL f(PFD)

ICP

suggested loop Filter

Freq

[MHz]

Type

Freq

[MHz]

Type

[MHz]

[mA]

C1/R2/C2

R3

C3

00

out

SPI Default

25

LVDS

25

Crystal

SEC

25

2.5

100 Ohm 242.5 pF

10 0x00

Pin Mode 1 - V1

25

LVDS

25

Crystal

SEC

25

2.5

100 Ohm 242.5 pF

10 0x01

Pin Mode 2 - V1

25

LVDS

25

Crystal

SEC

25

2.5

100 Ohm 242.5 pF

10 0x02

Pin Mode 3 - V1

25

LVDS

25

Crystal

SEC

25

2.5

100 Ohm 242.5 pF

10 0x03

Pin Mode 4 - V1

25

LVDS

25

Crystal

SEC

25

2.5

100 Ohm 242.5 pF

10 0x04

Pin Mode 5 - V1

25

LVDS

25

Crystal

SEC

25

2.5

100 Ohm 242.5 pF

10 0x05

Pin Mode 6 - V1

25

LVDS

25

Crystal

SEC

25

2.5

100 Ohm 242.5 pF

10 0x06

Pin Mode 7 - V1

25

LVDS

25

Crystal

SEC

25

2.5

100 Ohm 242.5 pF

10 0x07

Pin Mode 8 - V1

25

LVDS

25

Crystal

SEC

25

2.5

100 Ohm 242.5 pF

10 0x08

Pin Mode 9 - V1

25

LVDS

25

Crystal

SEC

25

2.5

100 Ohm 242.5 pF

10 0x09

Pin Mode 10 - V1

25

LVDS

25

Crystal

SEC

25

2.5

100 Ohm 242.5 pF

10 0x0A

Pin Mode 11 - V1

25

LVDS

25

Crystal

SEC

25

2.5

100 Ohm 242.5 pF

10 0x0B

Pin Mode 12 - V1

25

LVDS

25

Crystal

SEC

25

2.5

100 Ohm 242.5 pF

10 0x0C

Pin Mode 13 - V1

25

LVDS

25

Crystal

SEC

25

2.5

100 Ohm 242.5 pF

10 0x0D

Pin Mode 14 - V1

25

LVDS

25

Crystal

SEC

25

2.5

100 Ohm 242.5 pF

10 0x0E

Pin Mode 15 - V1

25

LVDS

25

Crystal

SEC

25

2.5

100 Ohm 242.5 pF

10 0x0F

Pin Mode 16 - V1

25

LVDS

25

Crystal

SEC

25

2.5

100 Ohm 242.5 pF

10 0x10

Pin Mode 17 - V1

30.72

LVDS

30.72

Crystal

SEC

30.72

2.5

220pF/400/22nF

100 Ohm 242.5 pF

10 0x11

Pin Mode 18 - V1 24.883

LVDS

24.883

Crystal

SEC

24.8832 2.5

100 Ohm 242.5 pF

10 0x12

Pin Mode 19 - V1

25

LVDS

25

Crystal

SEC

25

2.5

100 Ohm 242.5 pF

10 0x13

Pin Mode 20 - V1

0.008

LVCMOS

0.008

LVCMOS

PRI

0.008

0.5

1uF/1.3k/22uF

4010 Ohm 562.5 pF

10 0x14

Pin Mode 21 - V1

25

LVDS

25

Crystal

SEC

25

2.5

100 Ohm 242.5 pF

10 0x15

Pin Mode 22 - V1

25

LVDS

25

Crystal

SEC

25

2.5

100 Ohm 242.5 pF

10 0x16

Pin Mode 23 - V1

25

LVDS

25

Crystal

SEC

25

2.5

100 Ohm 242.5 pF

10 0x17

Pin Mode 24 - V1

25

LVDS

25

Crystal

SEC

25

2.5

100 Ohm 242.5 pF

10 0x18

Pin Mode 25 - V1

25

LVDS

25

Crystal

SEC

25

2.5

100 Ohm 242.5 pF

10 0x19

Pin Mode 26 - V1

25

LVDS

25

Crystal

SEC

25

2.5

100 Ohm 242.5 pF

10 0x1A

Pin Mode 27 - V1

25

LVDS

25

Crystal

SEC

25

2.5

10 Ohm

30.0 pF

10 0x1B

Pin Mode 28 - V1

25

LVDS

25

Crystal

SEC

25

2.5

100 Ohm 242.5 pF

10 0x1C

Pin Mode 29 - V1

10

LVCMOS

10

Crystal

AUTO

10

2.5

20pF/1210/68nF

100 Ohm 242.5 pF

10 0x1D

Pin Mode 30 - V1

25

LVCMOS

25

Crystal

PRI

25

2.5

100pF/500R/22nF

100 Ohm 242.5 pF

10 0x1E

Pin Mode 31 - V1

30.72

LVDS

30.72

LVDS

PRI

0.04

0.5

4.7uF/250/47uF

4010 Ohm 562.5 pF

10 0x1F

Pin Mode 32 - V1

25

LVDS

x

PRI

25

2.5

100pF/500R/22nF

100 Ohm 242.5 pF

100pF/500R/22nF

Internal LPF

components

PRI_REF

SEC_REF

100pF/500R/22nF

CDCM6208

www.ti.com

SCAS931A – MAY 2012 – REVISED JUNE 2012

Loop Filter recommendations for pin modes

The following two tables provide the internal charge pump and R3/C3 settings for pin modes. The designer can

either design their own, optimized loop filter, or use the suggested loop filter in the table.

Table 11. CDCM6208V1 Loop Filter Recommendation for Pin Mode

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