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MAX3243E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
WITH
±15-kV
IEC ESD PROTECTION
SLLS657A – APRIL 2005 – REVISED JUNE 2005
FUNCTION TABLES
ABC
EACH DRIVER
(1)
INPUTS
DIN
X
L
H
L
H
L
H
(1)
FORCEON
X
H
H
L
L
L
L
FORCEOFF
L
H
H
H
H
H
H
VALID RIN
RS-232 LEVEL
X
X
X
Yes
Yes
No
No
OUTPUT
DOUT
Z
H
L
H
L
Z
Z
DRIVER STATUS
Powered off
Normal operation with
auto-powerdown disabled
Normal operation with
auto-powerdown enabled
Powered off by
auto-powerdown feature
H = high level, L = low level, X = irrelevant, Z = high impedance
EACH RECEIVER
(1)
INPUTS
RIN2
L
H
L
L
H
H
Open
(1)
RIN1,
RIN3-RIN5
X
X
L
H
L
H
Open
FORCEOFF
L
L
H
H
H
H
H
VALID RIN
RS-232 LEVEL
X
X
Yes
Yes
Yes
Yes
Yes
OUTPUTS
ROUT2B
L
H
L
L
H
H
L
ROUT
Z
Z
H
L
H
L
H
Normal operation
with
auto-powerdown
disabled/enabled
RECEIVER
STATUS
Powered off while
ROUT2B is active
H = high level, L = low level, X = irrelevant, Z = high impedance (off), Open = input disconnected or
connected driver off
3