Datasheet

ST3243EB, ST3243EC Truth tables
Doc ID 8648 Rev 12 5/16
2 Truth tables
Table 3. Invalid truth table
RS-232 Signal present at any receiver input INVALID output
YES H
NO L
Table 4. Output control truth table
Force
ON
Force
OFF
Valid receiver level Operation status T
OUT
R
OUT
R
2OUTB
X 0 X Shutdown (Force OFF) HIGH Z HIGH Z ACTIVE
11 X
Normal operating (Force
ON)
ACTIVE ACTIVE ACTIVE
0 1 YES
Normal operating
(Auto power-down)
ACTIVE ACTIVE ACTIVE
01 NO
Shutdown
(Auto power-down)
HIGH Z ACTIVE ACTIVE