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