Datasheet

MAX3243E
www.ti.com SLLS657D –APRIL 2005– REVISED SEPTEMBER 2011
FUNCTION TABLES
ABC
Each Driver
(1)
INPUTS OUTPUT
DRIVER STATUS
VALID RIN
DIN FORCEON FORCEOFF DOUT
RS-232 LEVEL
X X L X Z Powered off
L H H X H
Normal operation with
auto-powerdown disabled
H H H X L
L L H Yes H
Normal operation with
auto-powerdown enabled
H L H Yes L
Powered off by auto-powerdown
X L H No Z
feature
(1) H = high level, L = low level, X = irrelevant, Z = high impedance
Each Receiver
(1)
INPUTS OUTPUT
RECEIVER STATUS
RIN FORCEON FORCEOFF ROUT
X X L Z Powered off
L X H H
Normal operation with
H X H L
auto-powerdown disabled/enabled
Open X H H
(1) H = high level, L = low level, X = irrelevant, Z = high impedance (off), Open = input disconnected or connected driver off
ROUT2B and Outputs INVALID
(1)
INPUTS OUTPUTS
OUTPUT STATUS
VALID RIN
RIN2 FORCEON FORCEOFF INVALID ROUT2B
RS-232 LEVEL
Yes L X X H L
Yes H X X H H
Always active
Yes Open X X H L
No Open X X L L
(1) H = high level, L = low level, X = irrelevant, Z = high impedance (off), Open = input disconnected or connected driver off
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