CDCM6208V1RGZT datasheet(10/78 Pages) TI

Part #	CDCM6208V1RGZT

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

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Manufacturer	TI [Texas Instruments]

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10 / 78 page

CDCM6208

SCAS931A – MAY 2012 – REVISED JUNE 2012

www.ti.com

SINGLE ENDED INPUT CHARACTERISTICS (PRI_REF, SEC_REF)

VDD_PRI, VDD_SEC = 1.71 V TO 1.89 V, 2.375 V TO 2.625 V, 3.135 V TO 3.465 V, TA = -40 °C TO 85 °C

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

VDD_PRI/SEC = 1.8 V

0.008

200

MHz

Reference and Bypass Input

fIN

Frequency

VDD_PRI/SEC = 3.3 V

0.008

250

MHz

0.8 x

VIH

Input High Voltage

VDD_PRI/

V

VDD_SEC

0.2 x

VIL

Input Low Voltage

VDD_PRI/

V

VDD_SEC

VHYST

Input hysteresis

20

65

150

mV

VDD_PRI/VDD_SEC = 3.465 V, VIH

IIH

Input High Current

30

µA

= 3.465 V

VDD_PRI/VDD_SEC = 3.465 V, VIL

IIL

Input Low Current

-30

µA

= 0 V

ΔV/ΔT

Reference Input Edge Rate

20% - 80%

0.75

V/ns

f PRI ≤ 200MHz

40%

60%

IDC SE

Reference Input Duty Cycle

200

≤ fPRI ≤ 250 MHz

43%

60%

C IN

Input Capacitance

2.25

pF

DIFFERENTIAL INPUT CHARACTERISTICS (PRI_REF, SEC_REF)

VDD_PRI, VDD_SEC = 1.71 V TO 1.89 V, 2.375 V TO 2.625 V, 3.135 V TO 3.465 V, TA = -40 °C TO 85 °C

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

Reference and Bypass Input

fIN

0.008

250

MHz

Frequency

VDD_PRI/SEC = 2.5/3.3 V

0.2

1.6

VPP

Differential Input Voltage Swing,

VI

Peak-to-Peak

VDD_PRI/SEC = 1.8 V

0.2

1

VPP

VDD_PRI/

VICM

Input Common Mode Voltage

CML input signaling, R4[7:6] = 00

VDD_SEC

V

-0.4

-0.1

LVDS, VDD_PRI/SEC

= 1.8/2.5/3.3 V,

VICM

Input Common Mode Voltage

0.8

1.2

1.5

V

R4[7:6] = 01, R4.1 = d.c.,

R4.0 = d.c.

LVDS (Q4[7:6,4:3] = 01)

15

65

mVpp

VHYST

Input hysteresis

CML (Q4[7:6,4:3] = 00)

20

85

mVpp

VDD_PRI/SEC = 3.465 V, VIH =

IIH

Input High Current

30

µA

3.465 V

IIL

Input Low Current

VDD_PRI/SEC = 3.465V, VIL = 0 V

-30

µA

ΔV/ΔT

Reference Input Edge Rate

20% - 80%

0.75

V/ns

IDCDIFF

Reference Input Duty Cycle

30%

70%

CIN

Input Capacitance

2.7

pF

10

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