ISP1122ABD datasheet(36/48 Pages) PHILIPS

Numer części	ISP1122ABD

Szczegółowy opis	Universal Serial Bus stand-alone hub

PDF	48 Pages

Scroll/Zoom	100%

Producent	PHILIPS [NXP Semiconductors]

Strona internetowa	http://www.nxp.com

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36 / 48 page

Philips Semiconductors

ISP1122A

USB stand-alone hub

Preliminary speciﬁcation

Rev. 01 — 27 March 2000

36 of 48

9397 750 06986

Fig 18. Receiver SE0 width tolerance.

handbook, halfpage

MGR872

differential

data lines

+3.3 V

0 V

tFST

VIH(min)

Full-speed timing symbols have a subscript preﬁx ‘F’, low-speed timings a preﬁx ‘L’.

Fig 19. Hub differential data delay and SOP distortion.

handbook, full pagewidth

MGR777

SOP distortion:

tSOP = tHDD (next J) − tHDD(SOP)

(A) downstream hub delay

(B) upstream hub delay

upstream

differential

data lines

hub delay

downstream

tHDD

hub delay

upstream

tHDD

downstream

differential

data lines

downstream

differential

data

upstream

differential

data

crossover

point

crossover

point

crossover

point

crossover

point

+3.3 V

0 V

+3.3 V

0 V

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