UPD72012 datasheet(28/36 Pages) NEC

Teilenummer	UPD72012

Bauteilbeschribung	HUB CONTROLLER FOR UNIVERSAL SERIAL BUS

PDF	36 Pages

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Hersteller	NEC [NEC]

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Data Sheet S13918EJ3V0DS

µPD72012

Measurement Conditions

(1) Differential data jitter

tPERIOD

Differential data lines

Crossover

points

Pair transition

× tPERIOD + txDJ2

Continuous

transition

× tPERIOD + txJR1

(2) EOP transition skew and EOP length differential

tPERIOD

Differential data lines

Crossover point

Extension

crossover points

Source EOP width: tFEOPT, tLEOPT

From differential

data until SE0 skew

× tPERIOD + tDEOP

Receiver EOP width: tFEOPR, tLEOPR

(3) Permissible range of receiver jitter

Differential data lines

Pair transition

× tPERIOD + tJR2

tPERIOD

Continuous transition

× tPERIOD + tJR1

tJR

tJR1

tJR2

Remark

tPERIOD is the data rate of a receiver that has the range that is defined in paragraph 7.1.11 of USB

Specification Revision 1.1.

UPD72012 Datenblatt(PDF) 28 Page - NEC