ST7263 STMICROELECTRONICS [STMicroelectronics], ST7263 Datasheet - Page 100

• Manufacturer Part Number: ST7263
• Description: LOW SPEED USB 8-BIT MCU FAMILY with up to 16K MEMORY, up to 512 BYTES RAM, 8-BIT ADC, WDG, TIMER, SCI & I2C
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

ST7263
COMMUNICATION INTERFACE CHARACTERISTICS (Cont’d)
Figure 44. USB: Data signal Rise and fall time
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Note1: 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: Low speed electrical characteristics
Rise/ Fall Time matching
Output signal Crossover
Driver characteristics:
V
VCRS
SS
Data Lines
Differential
Parameter
Rise time
Fall Time
Voltage
tf
Crossover
Symbol
VCRS
points
trfm
tr
tf
tr
Note 1, CL=600 pF
Note 1, CL=600 pF
Note 1, CL=50 pF
Note 1,CL=50 pF
Conditions
tr/tf
Min
1.3
75
75
80
Max
300
300
120
2.0
Unit
ns
ns
ns
ns
%
V