Datasheet

 
       
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SLLS538B − JUNE 2002 − REVISED OCTOBER 2004
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Function Tables
EACH DRIVER
INPUTS
OUTPUT
DIN FORCEON
FORCEOFF
VALID RIN
RS-232 LEVEL
DOUT
DRIVER STATUS
X X L X Z Powered off
L H H X H
Normal operation with
H HH XL
Normal operation with
auto-powerdown disabled
L L H Yes H
Normal operation with
H LH YesL
Normal operation with
auto-powerdown enabled
L L H No Z
Powered off by
H L H No Z
Powered off by
auto-powerdown feature
H = high level, L = low level, X = irrelevant, Z = high impedance
EACH RECEIVER
INPUTS
OUTPUT
RIN
EN
VALID RIN
RS-232 LEVEL
OUTPUT
ROUT
L L X H
H LX L
X HX Z
Open L No H
H = high level, L = low level, X = irrelevant,
Z = high impedance (off), Open = input
disconnected or connected driver off
logic diagram (positive logic)
DIN2
DOUT2
Auto-powerdown
RIN1
INVALID
ROUT1
DIN1
DOUT1
RIN2ROUT2
EN
FORCEON
FORCEOFF
13
12
20
14
1
15
10
17
8
11
16
9