ISP1521 datasheet(39/53 Pages) PHILIPS

39 / 53 page

Philips Semiconductors

ISP1521

Hi-Speed USB hub controller

Product data

Rev. 03 — 24 November 2004

39 of 53

9397 750 13702

Table 43:

Dynamic characteristics: high-speed source electrical characteristics

VCC = 3.0 V to 3.6 V; Tamb = −40 °Cto+70 °C; test circuit Figure 21; unless otherwise speciﬁed.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Driver characteristics

tHSR

rise time

10 % to 90 %

500

tHSF

fall time

90 % to 10 %

500

Clock timing

tHSDRAT

data rate

479.76

480.24

Mbit/s

tHSFRAM

microframe interval

124.9375 -

125.0625

µs

tHSRFI

consecutive microframe interval

difference

four high-speed

bit times

Table 44:

Dynamic characteristics: full-speed source electrical characteristics

VCC = 3.0 V to 3.6 V; Tamb = −40 °Cto+70 °C; test circuit Figure 22; unless otherwise speciﬁed.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Driver characteristics

tFR

rise time

CL = 50 pF; 10 % to 90 % of

|VOH − VOL|

tFF

fall time

CL = 50 pF; 90 % to 10 % of

|VOH − VOL|

tFRFM

differential rise and fall time

matching

[1] 90

111.1

ZDRV

driver output resistance

for the driver that is not

high-speed capable

Ω

VCRS

output signal crossover voltage

[1][2] 1.3

2.0

Data source timing[2]

tDJ1

source differential jitter for

consecutive transitions

see Figure 10

[1]

−3.5

+3.5

tDJ2

source differential jitter for paired

transitions

see Figure 10

[1]

−4

tFEOPT

source SE0 interval of EOP

see Figure 11

160

175

tFDEOP

source differential data-to-EOP

transition skew

see Figure 11

−2

Receiver timing[2]

tJR1

receiver data jitter tolerance for

consecutive transitions

see Figure 12

−18.5

+18.5

tJR2

receiver data jitter tolerance for

paired transitions

see Figure 12

−9

tFEOPR

receiver SE0 width

accepted as EOP; see

Figure 11

--ns

tFST

width of SE0 interval during

differential transaction

rejected as EOP; see Figure 13

--14

Hub timing (downstream ports conﬁgured as full-speed)[2]

tFHDD

hub differential data delay (without

cable)

see Figure 14; CL = 0 pF

--44

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