PDIUSBH12 datasheet(22/28 Pages) PHILIPS

22 / 28 page

Philips Semiconductors

Product specification

PDIUSBH12

USB 2-port hub

1999 Jul 22

CROSSOVER

POINT

CROSSOVER

POINT

CROSSOVER

POINT

SV00514

CROSSOVER

POINT

Hub Delay

Downstream

tHDD

Hub Delay

Upstream

tHDD

DOWNSTREAM

DIFFERENTIAL

DATA

UPSTREAM-

DIFFERENTIAL

DATA

UPSTREAM

DIFFERENTIAL

DATA

DOWNSTREAM-

DIFFERENTIAL

DATA

VDD

VSS

A. DOWNSTREAM HUB DELAY

B. UPSTREAM HUB DELAY

SOP DISTORTION

tSOP = tHDD(SOP) – tHDD (NEXT J)

LOW SPEED TIMINGS ARE DETERMINED IN THE SAME WAY FOR:

tLHDD AND tLSOP

Figure 2. Hub Differential Data Delay and SOP distortion

UPSTREAM-

DIFFERENTIAL

DATA

DOWNSTREAM-

DIFFERENTIAL

DATA

VDD

VSS

A. DOWNSTREAM EOP DELAY

B. UPSTREAM EOP DELAY

EOP DELAY

tEOPD = tEOP–

EOP DELAY RELATIVE TO tHDD

tEOPDR = tEOPD – tHDD

EOP SKEW

tHESK = tEOP+ – tEOP–

LOW SPEED TIMINGS ARE DETERMINED IN THE SAME WAY FOR:

tLEOPD, tLEOPDR, AND tLHESK

tEOP+

tEOP–

CROSSOVER

POINT

EXTENDED

CROSSOVER

POINT

EXTENDED

UPSTREAM

END OF CABLE

DOWNSTREAM

PORT

tEOP+

tEOP–

CROSSOVER

POINT

EXTENDED

CROSSOVER

POINT

EXTENDED

SV00515

Figure 3. Hub EOP Delay and EOP Skew

PDIUSBH12 Datasheet(PDF) 22 Page - NXP Semiconductors

PDIUSBH12 Datasheet(HTML) 22 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28

Datasheet Download

Link URL