ST72T631K4D0 查看數據表（PDF） - STMicroelectronics

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产品描述 (功能)

生产厂家

ST72T631K4D0

LOW SPEED USB 8-BIT MCU FAMILY with up to 16K MEMORY, up to 512 BYTES RAM, 8-BIT ADC, WDG, TIMER, SCI & I2C

STMicroelectronics 

ST7263

COMMUNICATION INTERFACE CHARACTERISTICS (Cont’d)

Figure 44. USB: Data signal Rise and fall time

Differential

Data Lines

VCRS

Crossover

points

VSS

tf

tr

USB: Low speed electrical characteristics

Parameter

Symbol

Driver characteristics:

Rise time

tr

Fall Time

tf

Rise/ Fall Time matching

Output signal Crossover

Voltage

trfm

VCRS

Conditions

Min

Max

Unit

Note 1,CL=50 pF

75

ns

Note 1, CL=600 pF

300

ns

Note 1, CL=50 pF

75

ns

Note 1, CL=600 pF

300

ns

tr/tf

80

120

%

1.3

2.0

V

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).

100/109

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