UPD72012 datasheet(25/36 Pages) NEC

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Data Sheet S13918EJ3V0DS

µPD72012

AC Characteristics (VDD = 3.3 V +0.3 V, TA = 0 to +70

°°°°C)

(1) Full-speed output driver characteristics

Parameter

Symbol

Conditions

MIN.

TYP.

MAX.

Unit

Output rise time (FS)

Output fall time (FS)

tFR, tFF

UD0, UD1

CL = 50 pF, TA = 25

°C,

10% to 90%

420

Crossover output voltage

VCRS

1.3

2.0

Driver output resistance

ZDRV

Ω

Full-speed data rate

tFDRATE

12Mbps

±0.25%

11.97

12.03

Mbps

tDJ1

Continuous transition

±3.5

Differential driver jitter (FS)

tDJ2

Pair transition

±4.0

Source jitter on SE0 transition from

differential transition (FS)

tFDEOP

–2

tJR1

Continuous transition

±18.5

Receiver jitter (FS)

tJR2

Pair transition

±9ns

One-way propagation delay

tFPROP

EOP source SE0 interval

tFEOPT

160

175

EOP receiver SE0 interval

tFEOPR

Accept as effective EOP.

SE0 time interval on differential

transition

tFST

(2) HUB repeater characteristics (Full-speed)

Parameter

Symbol

Conditions

MIN.

TYP.

MAX.

Unit

Output rise time (LS)

Output fall time (LS)

tr, tf

D10 to D50, D11 to D51

CL = 50 pF, TA = 25

°C,

10% to 90%

420

tHDD1

With cable

Differential data delay (LS)

tHDD2

Without cable

tHDJ1

Continuous transition

±3

Differential driver jitter (LS)

tHDJ2

Pair transition

±1

Data bit length distortion after SOP

(LS)

tFSOP

HUB EOP delay for tHDD1

tFEOPD

015

EOP output width skew (LS)

tFHESK

±15

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