Datasheet

ST485
2/13
PIN CONFIGURATION
PIN DESCRIPTION
TRUTH TABLE (DRIVER)
X= Don’t Care; Z=High Impedance
TRUTH TABLE (RECEIVER)
X= Don’t Care; Z=High Impedance
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is
not implied.
PlN N° SYMBOL NAME AND FUNCTION
1 RO Receiver Output
2RE
Receiver Output Enable
3 DE Driver Output Enable
4 DI Driver Input
5 GND Ground
6 A Non-inverting Receiver Input and Non-inverting Driver Output
7 B Inverting Receiver Input and Inverting Driver Output
8
V
CC
Supply Voltage
INPUTS OUTPUTS
RE
DE DI B A
XHHLH
XHLHL
XLXZZ
INPUTS OUTPUT
RE
DE A-B RO
LL≥ +0.2V H
LL≤ -0.2V L
L L INPUTS OPEN H
HL X Z
Symbol Parameter Value Unit
V
CC
Supply Voltage
7V
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