8339 Datasheet, PDF (2/13 Pages) STMicroelectronics – ±15KV ESD PROTECTED, LOW POWER RS-485/RS-422 TRANSCEIVER

ST485E
PIN CONFIGURATION
PIN DESCRIPTION
PlN N°
1
2
3
4
5
6
7
8
SYMBOL
RO
RE
DE
DI
GND
A
B
V_CC
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)
TRUTH TABLE (RECEIVER)
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
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
V_CC Supply Voltage
7
V
V_I
Control Input Voltage (RE, DE)
-0.5 to (V_CC + 0.5)
V
V_DI Driver Input Voltage (DI)
-0.5 to (V_CC + 0.5)
V
V_DO Driver Output Voltage (A, B)
± 14
V
V_RI Receiver Input Voltage (A, B)
± 14
V
V_RO Receiver Output Voltage (RO)
-0.5 to (V_CC + 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.
2/13