SP3223B Datasheet, PDF (16/24 Pages) Sipex Corporation – Intelligent +3.0V to +5.5V RS-232 Transceivers

RS - 232 SIGNAL
AT RECEIVER
INPUT
YES
SHUTDOWN
INPUT
HIGH
NO
HIGH
NO
HIGH
YES
NO
LOW
LOW
Table 3. AUTO ON-LINE^® Logic
ONLINE INPUT
LOW
HIGH
LOW
HIGH/LOW
HIGH/LOW
STATUS OUTPUT
TRANCEIVER
STATUS
HIGH
LOW
LOW
HIGH
LOW
Normal Operation
(AUTO ON-LINE^®)
Normal Operation
Sutdown
(AUTO ON-LINE^® )
Shutdown
Shutdown
Inactive Detection Block
RXINACT
RXIN
RS-232
Receiver Block
RXOUT
Figure 28. Stage I of AUTO ON-LINE^® Circuitry
Delay
Stage
Delay
Stage
Delay
Stage
Delay
Stage
Delay
Stage
R₁INACT
R₂INACT
R₃INACT
R₄INACT
SHUTDOWN
Figure 29. Stage II of AUTO ON-LINE^® Circuitry
R₅INACT
STATUS
Rev. 6/30/03
SP3223B/3243B +3.0V to +5.5V RS-232 Transceivers
16
© Copyright 2003 Sipex Corporation