RS - 232 SIGNAL
AT RECEIVER
INPUT
SHUTDOWN
INPUT
ONLINE INPUT
STATUS OUTPUT
TRANCEIVER
STATUS
YES
HIGH
LOW
HIGH
Normal Operation
(AUTO ON-LINE®)
NO
NO
HIGH
HIGH
HIGH
LOW
LOW
LOW
Normal Operation
Sutdown
(AUTO ON-LINE®
Shutdown
)
YES
NO
LOW
LOW
HIGH/LOW
HIGH/LOW
HIGH
LOW
Shutdown
Table 3. AUTO ON-LINE® Logic
R INACT
X
Inactive Detection Block
RS-232
Receiver Block
R OUT
X
R IN
X
Figure 28. Stage I of AUTO ON-LINE® Circuitry
Delay
Stage
Delay
Stage
Delay
Stage
Delay
Stage
Delay
Stage
STATUS
R1INACT
R4INACT
R5INACT
R2INACT
R3INACT
SHUTDOWN
Figure 29. Stage II of AUTO ON-LINE® Circuitry
Date: 6/2/04
SP3223EB/3243EB +3.0V to +5.5V RS-232 Transceivers
© Copyright 2004 Sipex Corporation
16
SIPEX [ SIPEX CORPORATION ]
