MAX3223E
www.ti.com.......................................................................................................................................... SLLS707A –JANUARY 2006–REVISED SEPTEMBER 2009
PARAMETER MEASUREMENT INFORMATION (continued)
3 V
2.7 V
2.7 V
2.7 V
0 V
0 V
EN
Receiver
Input
−2.7 V
ROUT
−3 V
Generator
(see Note B)
50 Ω
t
t
valid
invalid
V
CC
INVALID
Output
50% V
50% V
CC
CC
0 V
t
en
Auto-
powerdown
INVALID
= 30 pF
≈V+
V+
C
L
(see Note A)
0.3 V
V
Supply
CC
0 V
0.3 V
FORCEOFF
FORCEON
Voltages
DIN
DOUT
≈V−
V−
TEST CIRCUIT
VOLTAGE WAVEFORMS
Valid RS-232 Level, INVALID High
Indeterminate
2.7 V
0.3 V
If Signal Remains Within This Region
0 V
†
ms, INVALID
for More Than 30
Indeterminate
Valid RS-232 Level, INVALID High
Is Low
0.3 V
2.7 V
†
Auto-powerdown disables drivers and
reduces supply current to 1 µA
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