Datasheet

REV.
ADM222/ADM232A/ADM242
–5–
TOP VIEW
(Not to Scale)
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
C1+
V+
C1–
C2+
C2–
V–
T2
OUT
R2
IN
V
CC
GND
T1
OUT
R1
IN
R1
OUT
T1
IN
T2
IN
R2
OUT
ADM232A
Figure 9. ADM232A DIP/SOIC Pin Configuration
1
3
5
4
11
10
12
9
2
6
14
7
13
8
* INTERNAL 400k PULL-UP RESISTOR
ON EACH TTL/CMOS INPUT
** INTERNAL 5k PULL-DOWN RESISTOR
ON EACH RS-232 INPUT
+5V TO +10V
VOLTAGE DOUBLER
+5V TO –10V
VOLTAGE INVERTER
C1+
C1–
V+
V–
C2+
C2–
T1
ADM232A
T2
R1
R2
C1
0.1F
C2
0.1F
C3
0.1F
GND
TTL/CMOS
OUTPUTS
R1
OUT
R2
OUT
T1
OUT
T2
OUT
R1
IN
R2
IN
T1
IN
T2
IN
TTL/CMOS
INPUTS
*
RS-232
OUTPUTS
RS-232
INPUTS
**
5V INPUT
C5
0.1F
6.3V
15
C4
0.1F
V
CC
16
Figure 10. ADM232A Typical Operating Circuit
18
17
16
15
14
13
12
11
10
1
2
3
4
5
6
7
8
9
TOP VIEW
(Not to Scale)
ADM242
R2
IN
T2
OUT
EN
C1+
V+
C1–
V–
C2–
C2+
T2
IN
SHDN
V
CC
GND
T1
OUT
T1
IN
R1
OUT
R1
IN
R2
OUT
Figure 11. ADM242 DIP/SOIC Pin Configuration
2
4
6
5
12
11
13
10
3
7
8
14
9
18
* INTERNAL 400k PULL-UP RESISTOR
ON EACH TTL/CMOS INPUT
** INTERNAL 5k PULL-DOWN RESISTOR
ON EACH RS-232 INPUT
+5V TO +10V
VOLTAGE DOUBLER
+5V TO –10V
VOLTAGE INVERTER
C1+
C1–
V+
V–
C2+
C2–
T1
ADM242
T2
R1
R2
C1
0.1F
C2
0.1F
C3
0.1F
GND
TTL/CMOS
OUTPUTS
R1
OUT
R2
OUT
T1
OUT
T2
OUT
R1
IN
R2
IN
T1
IN
T2
IN
TTL/CMOS
INPUTS
*
RS-232
OUTPUTS
RS-232
INPUTS
**
5V INPUT
C5
0.1F
6.3V
16
C4
0.1F
V
CC
EN SHDN
15
17
1
Figure 12. ADM242 Typical Operating Circuit
B