ST7FSCR14T1 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

ST7FSCR14T1

8-BIT LOW-POWER, FULL-SPEED USB MCU WITH 16K FLASH, 768 RAM, SMARTCARD I/F, TIMER

STMicroelectronics 

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14.8 COMMUNICATION INTERFACE CHARACTERISTICS

14.8.1 USB - Universal Bus Interface

USB DC Electrical Characteristics

Parameter

Symbol

Conditions

Min.

Input Levels:

Differential Input Sensitivity

VDI

I(D+, D-)

0.2

Differential Common Mode Range VCM

Includes VDI range

0.8

Single Ended Receiver Threshold

VSE

1.3

Output Levels

Static Output Low

VOL

RL of 1.5K ohms to 3.6v

Static Output High

USBVCC: voltage level

VOH

USBV

RL of 15K ohm to VSS

VDD=5v

2.8

3.00

Note 1: RL is the load connected on the USB drivers.

Note 2: All the voltages are measured from the local ground potential.

Figure 45. USB: Data Signal Rise and Fall Time

ST7SCR

Max.

2.5

2.0

0.3

3.6

3.60

Unit

V

V

V

V

V

V

Differential

Data Lines

VCRS

Crossover

points

VSS

tf

tr

USB: Full speed electrical characteristics

Parameter

Symbol

Conditions

Min

Max

Unit

Driver characteristics:

Rise time

tr

Note 1,CL=50 pF

4

20

ns

Fall Time

tf

Note 1, CL=50 pF

4

20

ns

Rise/ Fall Time matching

trfm

tr/tf

90

110

%

Output signal Crossover

Voltage

VCRS

1.3

2.0

V

Note1: Measured from 10% to 90% of the data signal. For more detailed informations, please refer to

Chapter 7 (Electrical) of the USB specification (version 1.1).

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