ADM223/ADM230L–ADM241L
+5V INPUT
C1+
V+
C1–
C2+
C2–
V–
T2
OUT
R2
IN
1
2
3
4
5
6
7
8
16 V
CC
15
14
GND
T1
OUT
R1
IN
R1
OUT
T1
IN
T2
IN
R2
OUT
1µF
6.3V
1 C1+
3
C1–
+5V TO +10V
VOLTAGE
DOUBLER
V
CC
16
V+ 2
1µF
6.3V
1µF
6.3V
1µF
16V
4 C2+
5 C2–
+10V TO –10V
VOLTAGE
INVERTER
V–
6
1µF
16V
ADM232L
TOP VIEW
(Not to Scale)
13
12
11
10
9
T1
IN
TTL/CMOS
INPUTS
*
T2
IN
11
T1
14
T1
OUT
T2
OUT
R1
IN
RS-232
OUTPUTS
10
T2
7
R1
OUT
TTL/CMOS
OUTPUTS
R2
OUT
12
9
GND
15
R1
13
RS-232
INPUTS
**
R2
8
R2
IN
ADM232L
Figure 5. ADM232L DIP/SOIC Pin Configuration
*
INTERNAL 400kΩ PULL-UP RESISTOR ON EACH TTL/CMOS INPUT
**INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT
Figure 6. ADM232L Typical Operating Circuit
+5V INPUT
7
V
CC
T2
IN
T1
IN
R1
OUT
R1
IN
T1
OUT
GND
V
CC
C1+
GND
C2–
1
2
3
4
5
6
7
8
9
10
20
19
18
17
R2
OUT
R2
IN
T2
OUT
V–
C2–
C2+
V+
C1–
V–
C2+
T1
IN
TTL/CMOS
INPUTS
*
T2
IN
2
T1
5
T1
OUT
T2
OUT
R1
IN
RS-232
OUTPUTS
1
T2
18
R1
OUT
TTL/CMOS
OUTPUTS
R2
OUT
DO NOT MAKE
CONNECTIONS TO
THESE PINS
INTERNAL
–10V POWER
SUPPLY
INTERNAL
+10V POWER
SUPPLY
3
20
8 C1+
13 C1–
12 V–
17 V–
14 V+
R1
4
ADM233L
TOP VIEW
(Not to Scale)
16
15
14
13
12
11
RS-232
INPUTS
**
R2
19
R2
IN
C2+ 11
C2+ 15
C2– 10
C2– 16
GND
6
GND
9
ADM233L
Figure 7. ADM233L DIP Pin Configuration
*
INTERNAL 400kΩ PULL-UP RESISTOR ON EACH TTL/CMOS INPUT
**INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT
Figure 8. ADM233L Typical Operating Circuit
REV. 0
–5–
AD [ ANALOG DEVICES ]
