SN65HVD09-EP Datasheet, PDF (16/26 Pages) Texas Instruments – 9-CHANNEL RS-422 / RS-485 TRANSCEIVER

SN65HVD09-EP
SLLSEA3 – DECEMBER 2011
APPLICATION INFORMATION
FUNCTION TABLES
RECEIVER
B+
A
B−
DRIVER
B+
A
B−
INPUTS
B +¹
B −¹
L
H
H
L
OUTPUT
A
L
H
INPUT
A
L
H
OUTPUTS
B+ B−
LH
HL
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A
DE/RE
TRANSCEIVER
B+
B−
DRIVER WITH ENABLE
B+
A
B−
DE/RE
INPUTS
DE/RE A B +¹ B −¹
L
−L
H
L
−H
L
H
L−
−
H
H−
−
OUTPUTS
A B+ B−
L− −
H− −
−L H
−HL
WIRED-OR DRIVER
A
B+
B−
INPUTS
DE/RE A
L
L
L
H
H
L
H
H
OUTPUTS
B+
B−
Z
Z
Z
Z
L
H
H
L
TWO-ENABLE INPUT DRIVER
B+
A
B−
DE/RE
INPUT
A
L
H
OUTPUTS
B+ B−
Z
Z
H
L
INPUTS
DE/RE A
L
L
L
H
HL
HH
OUTPUTS
B+ B−
Z
Z
H
L
L
H
H
L
NOTE: H = high level, L = low level, X = irrelevant, Z = high impedance (off)
(1) An H in this column represents a voltage of 200 mV or higher than the other bus input. An L represents a voltage of
200 mV or lower than the other bus input. Any voltage less than 200 mV results in an indeterminate receiver output.
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