st3243eb STMicroelectronics, st3243eb Datasheet - Page 6

• Manufacturer Part Number: st3243eb
• Description: ?15 Kv Esd Protected 3 To 5.5 V, 400 Kbps, Rs-23 Transceiver With Auto-powerdown
• Manufacturer: STMicroelectronics

2
Table 3.
Table 4.
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FORCE
ON
X
1
0
0
FORCE
OFF
Truth tables
Invalid truth table
Output control truth table
0
1
1
1
RS-232 Signal present at any receiver input
Valid receiver level
YES
NO
X
X
YES
NO
Normal operating (Force
Shutdown (Force OFF)
(Auto-powerdown)
(Auto-powerdown)
Operation status
Normal operating
Shutdown
ON)
ACTIVE
ACTIVE
HIGH Z
HIGH Z
T
OUT
INVALID output
ACTIVE
ACTIVE
ACTIVE
HIGH Z
R
OUT
H
L
ACTIVE
ACTIVE
ACTIVE
ACTIVE
R
2OUTB