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ST7263BHX bảng dữ liệu(PDF) 123 Page - STMicroelectronics

tên linh kiện ST7263BHX
Giải thích chi tiết về linh kiện  Low speed USB 8-bit MCU family with up to 32K Flash/ROM, DFU capability, 8-bit ADC, WDG, timer, SCI & I짼C
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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ST7263BHX bảng dữ liệu(HTML) 123 Page - STMicroelectronics

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14.10 Communication interface characteristics
14.10.1 USB - universal bus interface
(Operating conditions T
A = 0 to +70°C, V
DD = 4.0 to 5.25V unless otherwise specified)
Notes:
1. RL is the load connected on the USB drivers.
2. All the voltages are measured from the local ground potential.
3. To improve EMC performance (noise immunity), it is recommended to connect a 100nF capacitor to the USBVCC pin.
Figure 72. USB: data signal rise and fall time
Table 27. USB: low-speed electrical characteristics
Note:
1. For more detailed information, please refer to Chapter 7 (Electrical) of the USB specification (version 1.1).
USB DC electrical characteristics
Symbol
Parameter
Conditions
Min.
Max.
Unit
VDI
Differential Input Sensitivity
I(D+, D-)
0.2
V 2)
VCM
Differential Common mode
Range
Includes VDI range
0.8
2.5
VSE
Single Ended Receiver Threshold
0.8
2.0
VOL
Static Output Low
RL 1) of 1.5K ohms to
3.6v
0.3
VOH
Static Output High
RL 1) of 15K ohms to
VSS
2.8
3.6
USBV
USBVCC: voltage level 3)
VDD=5v
3.00
3.60
Differential
Data Lines
VSS
tf
tr
Crossover
points
VCRS
Symbol
Parameter
Conditions
Min
Max
Unit
Driver characteristics:
tr
Rise time
CL=50 pF 1)
75
ns
CL=600 pF 1)
300
ns
tf
Fall Time
CL=50 pF 1)
75
ns
CL=600 pF 1)
300
ns
trfm
Rise/ Fall Time matching
tr/tf
80
120
%
VCRS
Output signal Crossover
Voltage
1.3
2.0
V



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