5962-0620701Q3A, 5962-0620702Q3A, 5962-0620703Q2A, 5962-0620704Q2A
Pin Descriptions
PIN
V
CC
V+
V-
GND
C1+
C1-
C2+
C2-
T
IN
T
OUT
R
IN
R
OUT
R
OUTB
INVALID
EN
FORCEOFF
FORCEON
NOTE:
1. The ICL3238E input pins incorporate positive feedback resistors. Once the input is driven to a valid logic level, the feedback resistor maintains
that logic level until V
CC
is removed. Unused transmitter inputs may be left unconnected by the user.
TABLE 1. POWER-DOWN LOGIC TRUTH TABLE
RCVR OR
XMTR
EDGE
WITHIN 30
SEC?
ICL3238E
No
No
Yes
Yes
No
No
X
X
H
H
H
H
H
H
L
L
H
H
L
L
L
L
X
X
Active
Active
Active
Active
High-Z
High-Z
High-Z
High-Z
Active
Active
Active
Active
Active
Active
High-Z
High-Z
Active
Active
Active
Active
Active
Active
Active
Active
No
Yes
No
Yes
No
Yes
No
Yes
L
H
L
H
L
H
L
H
Normal Operation (Enhanced
Auto Power-down Disabled)
Normal Operation (Enhanced
Auto Power-down Enabled)
Power-down Due to Enhanced
Auto Power-down Logic
Manual Power-down
RS-232
LEVEL
PRESENT
AT
RECEIVER
INPUT?
System power supply input (3.0V to 3.6V).
Internally generated positive transmitter supply (+5.5V).
Internally generated negative transmitter supply (-5.5V).
Ground connection.
External capacitor (voltage doubler) is connected to this lead.
External capacitor (voltage doubler) is connected to this lead.
External capacitor (voltage inverter) is connected to this lead.
External capacitor (voltage inverter) is connected to this lead.
TTL/CMOS compatible transmitter Inputs. (Note 1)
±15kV ESD Protected, RS-232 level (nominally ±5.5V) transmitter outputs.
±15kV ESD Protected, RS-232 compatible receiver inputs.
TTL/CMOS level receiver outputs.
TTL/CMOS level, noninverting, always enabled receiver outputs.
Active low output that indicates if no valid RS-232 levels are present on any receiver input.
Active low receiver enable control; doesn’t disable R
OUTB
outputs.
Active low control to shut down transmitters and on-chip power supply. This overrides any automatic circuitry and FORCEON
(See Tables 1 & 2, Note 1).
Active high input to override automatic powerdown circuitry thereby keeping transmitters active. (FORCEOFF must be high,
Note 1).
FUNCTION
FORCEOFF FORCEON TRANSMITTER RECEIVER
INPUT
INPUT
OUTPUTS
OUTPUTS
R
OUTB
OUTPUT
INVALID
OUTPUT
MODE OF OPERATION
3
FN6297.0
May 31, 2006
INTERSIL [ INTERSIL CORPORATION ]
