5962-0620705Q3A, 5962-0620706Q3A, 5962-0620707Q2A, 5962-0620708Q2A
TABLE 1. POWER-DOWN LOGIC TRUTH TABLE (Continued)
RCVR OR
XMTR
EDGE
WITHIN 30
SEC?
RS-232
LEVEL
PRESENT
AT
RECEIVER
INPUT?
FORCEOFF FORCEON TRANSMITTER RECEIVER
INPUT
INPUT
OUTPUTS
OUTPUTS
R
OUTB
OUTPUT
INVALID
OUTPUT
MODE OF OPERATION
INVALID DRIVING FORCEON AND FORCEOFF
(EMULATES AUTOMATIC POWER-DOWN)
X
X
NOTE:
2. Input is connected to INVALID Output.
TABLE 2. POWER-DOWN AND ENABLE LOGIC TRUTH TABLE
RS-232
SIGNAL
PRESENT
AT
RECEIVER
INPUT?
ICL3221E
No
No
Yes
Yes
No
No
Yes
Yes
No
No
ICL3243E
No
Yes
No
Yes
No
NOTE:
3. Applies only to the ICL3243E.
H
H
H
L
L
H
L
L
X
X
N.A.
N.A.
N.A.
N.A.
N.A.
Active
Active
High-Z
High-Z
High-Z
Active
Active
Active
High-Z
High-Z
Active
Active
Active
Active
Active
L
H
L
H
L
Normal Operation
(Auto Power-down Disabled)
Normal Operation
(Auto Power-down Enabled)
Power-down Due to Auto Power-down
Logic
Manual Power-down
Manual Power-down
H
H
H
H
H
H
L
L
L
L
H
H
L
L
L
L
X
X
X
X
L
H
L
H
L
H
L
H
L
H
Active
Active
Active
Active
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
Active
High-Z
Active
High-Z
Active
High-Z
Active
High-Z
Active
High-Z
N.A.
N.A.
N.A.
N.A.
N.A.
N.A.
N.A.
N.A.
N.A.
N.A.
L
L
H
H
L
L
H
H
L
L
Normal Operation
(Auto Power-down Disabled)
Normal Operation
(Auto Power-down Enabled)
Power-down Due to Auto Power-down
Logic
Manual Power-down
Manual Power-down w/Rcvr. Disabled
Manual Power-down
Manual Power-down w/Rcvr. Disabled
Note 2
Note 2
Note 2
Note 2
Active
High-Z
Active
High-Z
Active
Active
Yes
No
H
L
Normal Operation
Forced Auto Power-down
(NOTE 3)
FORCEOFF FORCEON
R
OUTB
EN
TRANSMITTER RECEIVER
INVALID
INPUT
INPUT
INPUT
OUTPUTS
OUTPUTS OUTPUTS OUTPUT
MODE OF OPERATION
4
FN6298.0
May 31, 2006
INTERSIL [ INTERSIL CORPORATION ]
