参数资料
型号: ST72F651AR6T1
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, MICROCONTROLLER, PQFP64
封装: 10 X 10 MM, ROHS COMPLIANT, TQFP-64
文件页数: 54/161页
文件大小: 2656K
代理商: ST72F651AR6T1
ST72651AR6
147/161
Doc ID 7215 Rev 4
COMMUNICATION INTERFACE CHARACTERISTICS (Cont’d)
13.11.4 USB - Universal Bus Interface
Note 1: RL is the load connected on the USB drivers.
Note 2: All the voltages are measured from the local ground potential.
Note 3: An external decoupling capacitor (typical 100nF, min 47nF) must be connected between this pin
and USBVSS.
Figure 92. USB: Data Signal Rise and Fall Time
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).
USB DC Electrical Characteristics
Parameter
Symbol
Conditions
Min. 2)
Max. 2)
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 1.5K ohms to 3.6V 1)
0.3
V
Static Output High
VOH
RL of 15K ohm to VSS
1)
2.8
3.6
V
USBVCC: voltage level
3)
USBV
VDD=4.0V - 5.5V
ILOAD Max = 3mA
3.00
3.60
V
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
Differential
Data Lines
VSS
tf
tr
Crossover
points
VCRS
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