STM32L151VD datasheet(110/140 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32L151xD STM32L152xD

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Doc ID 022027 Rev 6

USB characteristics

The USB interface is USB-IF certified (full speed).

Figure 34.

USB timings: definition of data signal rise and fall time

Table 60.

USB startup time

Symbol

Parameter

Max

Unit

tSTARTUP

(1)

Guaranteed by design, not tested in production.

USB transceiver startup time

µs

Table 61.

USB DC electrical characteristics

Symbol

Parameter

Conditions

Min.(1)

All the voltages are measured from the local ground potential.

Max.(1)

Unit

Input levels

VDD

USB operating voltage

3.0

3.6

VDI

(2)

Guaranteed by characterization, not tested in production.

Differential input sensitivity

I(USB_DP, USB_DM)

0.2

VCM

(2)

Differential common mode range Includes VDI range

0.8

2.5

VSE

(2)

Single ended receiver threshold

1.3

2.0

Output levels

VOL

(3)

Tested in production.

Static output level low

RL of 1.5 kΩ to 3.6 V

(4)

RL is the load connected on the USB drivers.

-0.3

VOH

(3)

Static output level high

RL of 15 kΩ to VSS

(4)

2.8

3.6

Table 62.

USB: full speed electrical characteristics

Driver characteristics(1)

Symbol

Parameter

Conditions

Min

Max

Unit

Rise time(2)

CL = 50 pF

420

Fall Time(2)

CL = 50 pF

trfm

Rise/ fall time matching

tr/tf

110

VCRS

Output signal crossover voltage

1.3

2.0

ai14137

Differen tial

Data L ines

VSS

VCRS

Crossover

points

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