LXT6155LE datasheet(39/50 Pages) INTEL

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Datasheet

155 Mbps SDH/SONET/ATM Transceiver — LXT6155

Table 29. Transmit Analog Characteristics

Parameters

Note

Min

Typ

Max

Unit

Test Conditions

Transmit jitter generation

(Intrinsic jitter SONET spec)

12 kHz - 1.3 MHz

0.1

UIpp

PRBS(23) pattern. Transmit

input data and clock have no

input jitter. Receive line input is

all zeros.

0.01

UIrms

Transmit jitter generation

(Intrinsic jitter SDH spec)

500 Hz - 1.3 MHz

1.5

UIpp

65 kHz - 1.3 MHz

0.075

UIpp

Transmit jitter transfer function

peaking2

DC - 230 kHz

0.4

PRBS(23) data. Input jitter as

shown inFigure26.

Synthesizer capture range

Fcap

-20

+20

ppm

parallel mode

Synthesizer track range

Ftrack

-20

+20

ppm

Synthesizer lock time

Tlock

100

µs

Transmit output rise and fall times

- CMI signals

TTIP0

TRING0

2.2

10% - 90%

0m cable length

Transmit output amplitude - CMI

signals

TTIP0

TRING0

0.9

1.1

Vpp

TTIP0/TRING0

output impedance

Zout

1.6

2.0

Ω

1. Typical values are at 25C and 3.3V. They are for design aid only; not guaranteed and not subject to production testing.

2. Not production tested, guaranteed by design and other correlation factors.

Table 30. Receive Timing Characteristics (See Figures 20 and 21)

Parameter

Sym

Min

Typ

Max

Unit

Test Conditions

Receive serial output clock

frequency

RSOCLKp

RSOCLKn

155.52

MHz

Receive serial output clock duty

cycle

RSOCLKdc

Receive serial output clock and

data rise/fall time2

-1.2

20% - 80%.

RSOCLKP/RSOCLKN to RPOS/

RNEG propagation delay

RSOCLKpd

-0.5

1.5

Receive parallel output clock

frequency

RPOCLK

19.44

MHz

Receive parallel output clock duty

cycle

RPOCPdc

Receive parallel output data &

clock rise/fall time

RPOCLKt

RPOCLK to RPOD<0:7>

propagation delay

RPOCLKpd

RPOCLK to ROFP propagation

delay

ROFPpd

Reference Input Clock into

XTALIN pin (TTL)

REFCLK

19.44

MHz

The REFCLK replaces the

crystal

1. Typical values are at 25C and 3.3V. They are for design aid only; not guaranteed and not subject to production testing.

2. Not production tested, guaranteed by design and other correlation factors.

LXT6155LE Datasheet(PDF) 39 Page - Intel Corporation

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