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STR750F bảng dữ liệu(PDF) 63 Page - STMicroelectronics

tên linh kiện STR750F
Giải thích chi tiết về linh kiện  ARM7TDMI-S, 32-bit MCU with Flash, SMI, 3 std 16-bit timers PWM timer, fast 10-bit ADC, I2C, UART, SSP, USB and CAN
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
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STR750F bảng dữ liệu(HTML) 63 Page - STMicroelectronics

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STR750F
Electrical parameters
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3.3.11
USB characteristics
The USB interface is USB-IF certified (Low Speed and High Speed).
Figure 29.
USB: data signal rise and fall time
Table 38.
USB characteristics
USB DC Electrical Characteristics
Symbol
Parameter
Conditions
Min.(1)(2)
1.
All the voltages are measured from the local ground potential.
2.
It is important to be aware that the DP/DM pins are not 5 V tolerant. As a consequence, in case of a a
shortcut with Vbus (typ: 5.0V), the protection diodes of the DP/DM pins will be direct biased . This will not
damage the device if not more than 50 mA is sunk for longer than 24 hours but the reliability may be
affected.
Max.(1)(2) Unit
Input Levels
VDI
Differential Input Sensitivity
I(DP, DM)
0.2
V
VCM
Differential Common Mode
Range
Includes VDI range
0.8
2.5
VSE
Single Ended Receiver
Threshold
1.3
2.0
Output Levels
VOL
Static Output Level Low
RL of 1.5 kΩ to 3.6V
(3)
3.
RL is the load connected on the USB drivers
0.3
V
VOH
Static Output Level High
RL of 15 kΩ to VSS
(3)
2.8
3.6
Table 39.
USB: Full speed electrical characteristics
Symbol
Parameter
Conditions
Min
Max
Unit
Driver characteristics:
tr
Rise time(1)
1.
Measured from 10% to 90% of the data signal. For more detailed informations, please refer to USB
Specification - Chapter 7 (version 2.0).
CL=50 pF
420
ns
tf
Fall Time1)
CL=50 pF
4
20
ns
trfm
Rise/ Fall Time matching
tr/tf
90
110
%
VCRS
Output signal Crossover Voltage
1.3
2.0
V
Differential
Data Lines
VSS
tf
tr
Crossover
points
VCRS



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