Datasheet

DIN
DOUT
Auto-powerdown
INVALID
RIN
FORCEOFF
FORCEON
ROUT
EN
11
16
9
13
10
8
1
12
MAX3221
SLLS348N –JUNE 1999–REVISED JANUARY 2014 www.ti.com
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
Function Tables
xxx
Each Driver
(1)
INPUTS
OUPUT DOUT DRIVER STATUS
DIN FORCEON FORCEOFF VALID RIN RS-232
LEVEL
X X L X Z Powered off
L H H X H Normal operation
with auto-powerdown
H H H X L
disabled
L L H Yes H Normal operation
with auto-powerdown
H L H Yes L
enabled
L L H No Z Powered off by auto-
powerdown feature
H L H No Z
(1) H = high level, L = low level, X = irrelevant, Z = high impedance
Each Receiver
(1)
INPUTS
OUTPUT ROUT
RIN EN VALID RIN RS-232 LEVEL
L L X H
H L X L
X H X Z
Open L No H
(1) H = high level, L = low level, X = irrelevant, Z = high impedance (off), Open = disconnected input or connected driver off
Logic Diagram (Positive Logic)
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