ST490A 查看數據表（PDF） - STMicroelectronics

零件编号

产品描述 (功能)

生产厂家

ST490A

Low power high speed RS-485/RS-422 transceiver

STMicroelectronics 

Truth tables

2

Truth tables

Table 2.

Note:

Truth table (driver)

Inputs

DI

L

H

X = Don’t care; Z = High impedance

Table 3.

Note:

Truth table (receiver)

Differential inputs

A-B

≥ -0.2V

between -0.2V to 0.2V

≤ -0.2V

OPEN

X = Don’t care; Z = High impedance

ST490A

Outputs

Y

Z

L

H

H

L

Outputs

RO

H

?

L

H

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