SP3223H Datasheet, PDF (16/23 Pages) Sipex Corporation – High Speed Intelligent +3.0V to +5.5V RS-232 Transceivers

RS-232 SIGNAL
AT RECEIVER
INPUT
YES
NO
SHUTDOWN
INPUT
HIGH
HIGH
NO
HIGH
YES
LOW
NO
Table 3. Auto-Online Logic
LOW
ONLINE INPUT
STATUS OUTPUT
TRANSCEIVER
STATUS
-
HIGH
LOW
-
-
HIGH
LOW
LOW
HIGH
LOW
Normal Operation
Normal Operation
Shutdown
(Auto-Online)
Shutdown
Shutdown
Inactive Detection Block
RXINACT
RXIN
RS-232
Receiver Block
RXOUT
Figure 23. Stage I of Auto-Online Circuitry
Delay
Stage
Delay
Stage
Delay
Stage
Delay
Stage
Delay
Stage
R₁INACT
R₂INACT
R₃INACT
R₄INACT
SHUTDOWN
R₅INACT
STATUS
Figure 24. Stage II of Auto-Online Circuitry
Rev. 6/30/03
SP3223H +3.0V to +5.5V RS-232 Transceivers
16
© Copyright 2003 Sipex Corporation