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ST7262 Datasheet(PDF) 117 Page - STMicroelectronics

Part # ST7262
Description  LOW SPEED USB 8-BIT MCU WITH 3 ENDPOINTS, FLASH OR ROM MEMORY, LVD, WDG, 10-BIT ADC, 2 TIMERS, SCI, SPI
PDF  139 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST7262 Datasheet(HTML) 117 Page - STMicroelectronics

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12.11 COMMUNICATION INTERFACE CHARACTERISTICS
12.11.1 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. Not tested in production, guaranteed by design.
4. To improve EMC performance (noise immunity), it is recommended to connect a 100nF capacitor to the
USBVCC pin.
Figure 77. USB: Data Signal Rise and Fall Time
Table 26. USB: Low-speed Electrical Characteristics
Note 1: Measured from 10% to 90% of the data signal. For more detailed informations, please refer to Chapter 7 (Elec-
trical) of the USB specification (version 1.1).
USB DC Electrical Characteristics
Parameter
Symbol
Conditions 2)
Min.
Max.
Unit
Differential Input Sensitivity
VDI
I(D+, D-)
0.2 3)
V
Differential Common Mode Range
VCM
Includes VDI range
0.8 3)
2.5 3)
V
Single Ended Receiver Threshold
VSE
0.8 3)
2.0 3)
V
Static Output Low
VOL
RL of 1.5K ohms to 3.6V 1)
0.3
V
Static Output High
VOH
RL of 15K ohms to VSS
1)
2.8
3.6
V
USBVCC: voltage level 4)
USBV
VDD=5V
3.00
3.60
V
Differential
Data Lines
VSS
tf
tr
Crossover
points
VCRS
Parameter
Symbol
Conditions
Min
Max
Unit
Driver characteristics:
Rise time
tr
CL=50 pF 1)
75
ns
CL=600 pF 1)
300
ns
Fall Time
tf
CL=50 pF 1)
75
ns
CL=600 pF 1)
300
ns
Rise/ Fall Time matching
trfm
tr/tf
80
120
%
Output signal Crossover
Voltage
VCRS
1.3
2.0
V



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