ST485AD 데이터 시트보기 (PDF) - STMicroelectronics
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ST485AD Datasheet PDF : 12 Pages
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ST485
PIN CONFIGURATION
PIN DESCRIPTION
PlN N°
1
2
3
4
5
6
7
8
SYMBOL
RO
RE
DE
DI
GND
A
B
VCC
NAME AND FUNCTION
Receiver Output
Receiver Output Enable
Driver Output Enable
Driver Input
Ground
Non-inverting Receiver Input and Non-inverting Driver Output
Inverting Receiver Input and Inverting Driver Output
Supply Voltage
TRUTH TABLE (DRIVER)
INPUTS
RE
DE
DI
X
H
H
X
H
L
X
L
X
X= Don’t Care; Z=High Impedance
OUTPUTS
B
A
L
H
H
L
Z
Z
TRUTH TABLE (RECEIVER)
INPUTS
RE
DE
A-B
L
L
≥ +0.2V
L
L
≤ -0.2V
L
L
INPUTS OPEN
H
L
X
X= Don’t Care; Z=High Impedance
OUTPUT
RO
H
L
H
Z
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
VCC Supply Voltage
12
V
VI
Control Input Voltage (RE, DE)
-0.5 to (VCC + 0.5)
V
VDI Driver Input Voltage (DI)
-0.5 to (VCC + 0.5)
V
VDO Driver Output Voltage (A, B)
± 14
V
VRI Receiver Input Voltage (A, B)
± 14
V
VRO Receiver Output Voltage (RO)
-0.5 to (VCC + 0.5)
V
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is
not implied.
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