Datasheet

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MAX3227
3-V TO 5.5-V SINGLE-CHANNEL RS-232 LINE DRIVER/RECEIVER
WITH ± 15-kV ESD PROTECTION
SLLS673A – AUGUST 2005 – REVISED FEBRUARY 2006
FUNCTION TABLE
(1)
INPUT CONDITIONS OUTPUT STATES
RECEIVER
VALID
OR
RS-232
OPERATING MODE
DRIVER
FORCEON FORCEOFF LEVEL DRIVER RECEIVER INVALID READY
EDGE
PRESENT AT
WITHIN
RECEIVER
30 s
Auto-Powerdown Plus Conditions
Normal operation,
H H NO NO Active Active L H
auto-powerdown plus disabled
Normal operation,
H H NO YES Active Active H H
auto-powerdown plus disabled
Normal operation,
L H YES NO Active Active L H
auto-powerdown plus enabled
Normal operation,
L H YES YES Active Active H H
auto-powerdown plus enabled
Powerdown,
L H NO NO Z Active L L
auto-powerdown plus enabled
Powerdown,
L H NO YES Z Active H L
auto-powerdown plus enabled
X L X NO Z Active L L Manual powerdown
X L X YES Z Active H L Manual powerdown
Auto-Powerdown Conditions
Powerdown,
INVALID INVALID X NO Z Active L L
auto-powerdown enabled
Normal operation,
INVALID INVALID X YES Active Active H H
auto-powerdown enabled
(1) H = high level, L = low level, X = irrelevant, Z = high impedance
2
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