STR720 datasheet(388/401 Pages) STMICROELECTRONICS

388 / 401 page

STR720 - ELECTRICAL CHARACTERISTICS

388/401

VDD(all) = 1.80 V ± 10%, VDD3(all) = 3.30 V ± 10%, TA = -40 / +85 °C unless otherwise specified.

Data based on design guidelines and validation, not tested in production.

VDD(all) = 1.80 V ± 10%, VDD3(all) = 3.30 V ± 10%, TA = -40 / +85 °C unless otherwise specified.

Data based on design guidelines and validation, not tested in production.

VOL

Low level output voltage

Measured with pull-up of

1.425 k

Ω to 3.6 V

0.0

0.3

VOH

High level output voltage

Measured with pull-down of

14.25 k

Ω to GND

2.8

3.6

VCRS

Output signal crossover volt-

age

Excluding the first transition

from Idle state

1.3

2.0

Table 104. USB Full-speed AC Characteristics

Symbol

Parameter

Test Conditions(1)

Value

Unit

Min

Typ

Max

TFR

Rise Time

RS = 27 Ω, CL = 50 pF.

See Figure 78.

TFF

Fall Time

RS = 27 Ω, CL = 50 pF.

See Figure 78.

TFRFM

Differential rise and fall time

matching

(TFR / TFF) excluding the first

transition from Idle state

111.11

ZDRV

Driver output resistance(2)

RS = 27 Ω.

Ω

Figure 78. USB Data signal rise and fall time

Table 103. USB DC Characteristics

Symbol

Parameter

Test Conditions(1)

Value

Unit

Min

Typ

Max

Differential

Data Lines

TFR

TFF

Crossover

points

VCRS

VSS

90%

10%

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