SP3238E Datasheet, PDF (14/20 Pages) Sipex Corporation – Intelligent +3.0V to +5.5V RS-232 Transceivers

SHUTDOWN ONLINE
INPUT
INPUT
HIGH
-
HIGH
HIGH
HIGH
LOW
HIGH
LOW
LOW
-
LOW
-
Table 2. Auto-Online Logic
RS-232 SIGNAL AT
RECEIVER INPUT
YES
NO
NO (<100µs)
NO (>100µs)
YES
NO
STATUS
OUTPUT
T_XOUT
R_XOUT
R₁OUT
TRANSCEIVER
STATUS
HIGH Active Active Active
Normal
Operation
LOW Active Active Active
Normal
Operation
LOW Active Active Active
Normal
Operation
LOW
High-Z High-Z Active
Shutdown
(Auto-Online)
HIGH High-Z High-Z Active
Shutdown
LOW High-Z High-Z Active
Shutdown
Inactive Detection Block
RXINACT
RXIN
RS-232
Receiver Block
RXOUT
Figure 18. Stage I of Auto-Online Circuitry
Delay
Stage
Delay
Stage
Delay
Stage
R₁INACT
R₂INACT
R₃INACT
SHUTDOWN
Figure 19. Stage II of Auto-Online Circuitry
SP3238EDS/04
SP3238E +3.0V to +5.5V RS-232 Transceivers
14
STATUS
© Copyright 1999 Sipex Corporation