XRT91L33 Просмотр технического описания (PDF) - Exar Corporation

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XRT91L33

STS-12/STS-3 MULTIRATE CLOCK AND DATA RECOVERY UNIT

Exar Corporation 

REV. V1.0.0

XRT91L33

STS-12/STS-3 MULTIRATE CLOCK AND DATA RECOVERY UNIT

SYMBOL

VIH

VIL

IIH

PARAMETER

Input HIGH voltage

Input LOW voltage

Input HIGH current

IIL

Input LOW current

TABLE 9: LVTTL INPUTS

MIN.

2.0

TYP.

0

-50

-50

MAX.

VDD

0.8

50

50

UNITS

V

CONDITIONS

V

μA VIN = 2.75 V, VDD =

Maximum

μA VIN = 0.5 V, VDD =

Maximum

3.5 AC Characteristics

TABLE 10: PERFORMANCE SPECIFICATIONS

Test Condition: VDD = 3.3V + 5% unless otherwise specified

SYMBOL

PARAMETER

MIN

TYP

MAX

f

VCO center frequency

622.08

fTOL

CDR’s reference clock frequency

-250

250

fTREF_CLK OC-12/STS-12 capture range

-500

500

CLKOUTDC

Clock output duty cycle

45

55

tLOCK

OC-12/STS-12 acquisition lock time

16

tLOCK_R,

tLOCK_F

JGEN_CLCK

JTOL

LOCK output rise and fall time

RXCLKOP/N iitter generation

OC-12/STS-12 jitter tolerance

500

0.005 0.01

0.40

0.5

UNITS

MHz

CONDITIONS

ppm

ppm with respect to the fixed

reference frequency

% UI 20% minimum transition

density

μs

Valid REFCK and

device already pow-

ered up

ps 10% to 90%, with 100 Ω

and 5 pF capacitive

equivalent load

UIrms

UI Sinusoidal input jitter of

RXDIP/N from 250 KHz

to 5MHz

11

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