SP3243EBCA-L-TR Datasheet, PDF (15/25 Pages) Exar Corporation – 3 Driver/5 Receiver Intelligent +3.0V to +5.5V RS-232 Transceivers

RS-232 SIGNAL
AT RECEIVER
INPUT
YES
SHUTDOWN
INPUT
HIGH
NO
HIGH
NO
HIGH
YES
LOW
NO
LOW
Table 3. AUTO ON-LINE^® Logic
ONLINE INPUT
STATUS OUTPUT
TRANSCEIVER
STATUS
LOW
HIGH
LOW
HIGH / LOW
HIGH / LOW
HIGH
LOW
LOW
HIGH
LOW
Normal Operation
(Auto-Online)
Normal Operation
Shutdown
(Auto-Online)
Shutdown
Shutdown
Inactive Detection Block
RXINACT
RXIN
RS-232
Receiver Block
RXOUT
Figure 21. Stage I of AUTO ON-LINE^® Circuitry
Delay
Stage
Delay
Stage
Delay
Stage
Delay
Stage
Delay
Stage
R₁INACT
R₂INACT
R₃INACT
R₄INACT
SHUTDOWN
R₅INACT
Figure 22. Stage II of AUTO ON-LINE^® Circuitry
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
15
STATUS
SP3243E_102_060611