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STR71XF Datasheet(PDF) 65 Page - STMicroelectronics

Part # STR71XF
Description  ARM7TDMI??32-bit MCU with Flash, USB, CAN 5 timers, ADC, 10 communications interfaces
PDF  78 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STR71XF Datasheet(HTML) 65 Page - STMicroelectronics

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STR71xF
Electrical parameters
65/78
4.3.10
USB characteristics
The USB interface is USB-IF certified (Full Speed).
Figure 37.
USB: data signal rise and fall time
Table 39.
USB startup time
Symbol
Parameter
Conditions
Max
Unit
tSTARTUP
USB transceiver startup time
1
µs
Table 40.
USB DC 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 41.
USB: Full speed driver electrical characteristics
Symbol
Parameter
Conditions
Min
Max
Unit
tr
Rise time(1)
1.
Measured from 10% to 90% of the data signal. For more detailed information, 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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