ST7LCR

21/29

as near as possible to the pins of the micro and the component is put in reset mode.

This test conforms to the IEC1000-4-2 and SAEJ1752/3 standards. For more details,

refer to the application note AN1181.

4.8

Communication interface characteristics

Figure 6.

USB data signal rise and fall time

Table 20.

Electrical sensitivities

Symbol

Parameter

Conditions

1.

Class description: A Class is an STMicroelectronics internal specification. All its limits are higher than the

JEDEC specifications, that means when a device belongs to Class A it exceeds the JEDEC standard. B

Class strictly covers all the JEDEC criteria (international standard).

LU

Static latch-up class

A

DLU

Dynamic latch-up class

A

Table 21.

USB DC electrical characteristics

Parameter

Symbol

Conditions

Min.

Max.

Unit

Input levels

Differential input sensitivity

VDI

I(D+, D-)

0.2

V

Differential common mode

range

VCM

Includes VDI range

0.8

2.5

V

Single ended receiver

threshold

VSE

1.3

2.0

V

Output levels

Static output low

VOL

RL of 1.5 k

1.

potential.

0.3

V

Static output high

VOH

RL of 15 k

Ω to V

SS

(1)

2.8

3.6

V

USBVCC: voltage level

USBV

3.00

3.60

V

Differential

Data Lines

Crossover

points

VCRS