ICL3224 Intersil, ICL3224 Datasheet - Page 3

• Manufacturer Part Number: ICL3224
• Description: 1 Microamp/ +3V to +5.5V/ 250kbps/ RS-232 Transceivers with Enhanced Automatic Powerdown
• Manufacturer: Intersil

Pin Descriptions
Typical Operating Circuits
TTL/CMOS
FORCEOFF Active low to shut down transmitters and on-chip power supply. This overrides any automatic circuitry and FORCEON (see Table 2).
FORCEON
INVALID
LEVELS
READY
R
R
LOGIC
T
GND
V
C1+
C2+
OUTB
PIN
C1-
C2-
R
T
OUT
V+
OUT
V-
CC
IN
IN
+3.3V
0.1µF
0.1µF
C
C
1
2
R2
R1
T2
T1
System power supply input (3.0V to 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.
RS-232 level (nominally ±5.5V) transmitter outputs.
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 high input to override automatic powerdown circuitry thereby keeping transmitters active. (FORCEOFF must be high).
Internally generated positive transmitter supply (+5.5V).
Internally generated negative transmitter supply (-5.5V).
Active high output that indicates when the ICL32XX is ready to transmit (i.e., V- ≤ -4V)
OUT
OUT
+
IN
IN
13
12
15
10
+
+
14
2
4
5
6
1
0.1µF
C1+
C1-
C2+
C2-
FORCEON
READY
ICL3224
GND
V
R
R
3
CC
2
1
T
T
19
FORCEOFF
18
1
2
INVALID
5kΩ
5kΩ
ICL3224, ICL3226, ICL3238, ICL3244
V+
V-
3
7
17
8
16
9
20
11
T1
T2
R1
R2
OUT
TO POWER
CONTROL
LOGIC
+ C
OUT
+
IN
IN
0.1µF
C
0.1µF
V
3
4
CC
RS-232
LEVELS
FUNCTION
TTL/CMOS
LEVELS
LOGIC
+3.3V
0.1µF
0.1µF
C
C
R1
1
2
T1
OUT
+
+
+
IN
11
12
2
4
6
0.1µF
9
1
5
C1+
C1-
C2+
C2-
READY
FORCEON
ICL3226
GND
V
R
CC
1
T
15
FORCEOFF
14
1
INVALID
5kΩ
V+
V-
3
7
13
8
16
10
T1
R1
OUT
+ C
IN
+ 0.1µF
TO POWER
CONTROL
LOGIC
0.1µF
C
V
3
4
CC
RS-232
LEVELS