Datasheet
ADM202E/ADM1181A
Rev. C | Page 5 of 16
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
14
13
12
11
16
15
10
98
1
2
3
4
7
6
5
TOP VIEW
(Not to Scale)
C1+
R1
IN
T1
OUT
GND
V
CC
V+
C1–
C2+
T2
IN
T1
IN
R1
OUT
C2–
V–
T2
OUT
R2
IN
R2
OUT
ADM202E
ADM1181A
00066-003
Figure 3. Pin Configuration
Table 3. Pin Function Descriptions
Pin No. Mnemonic Description
16 V
CC
Power Supply Input: 5 V ± 10%.
2 V+ Internally Generated Positive Supply (+9 V nominal).
6 V− Internally Generated Negative Supply (−9 V nominal).
15 GND Ground Pin. Must be connected to 0 V.
1, 3 C1+, C1−
External Capacitor 1 is connected between these pins. A 0.1 µF capacitor is recommended, but larger
capacitors of up to 47 µF can be used.
4, 5 C2+, C2−
External Capacitor 2 is connected between these pins. A 0.1 µF capacitor is recommended, but larger
capacitors of up to 47 µF can be used.
10, 11 T
IN
Transmitter (Driver) Inputs. These inputs accept TTL/CMOS levels.
7, 14 T
OUT
Transmitter (Driver) Outputs. These are RS-232 signal levels (typically ±9 V).
8, 13 R
IN
Receiver Inputs. These inputs accept RS-232 signal levels. An internal 5 kΩ pull-down resistor to GND is
connected on each input.
9, 12 R
OUT
Receiver Outputs. These are CMOS output logic levels.
*
INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT
C1+
C1–
C2+
C2–
V
CC
10V
10V
V+
V–
+5V TO +10V
VOLTAGE
DOUBLER
5V INPUT
C3
6.3V
+10V TO –10V
VOLTAGE
INVERTER
C4
10V
T1
OUT
T1
IN
C5
T2
OUT
T2
IN
ADM202E
R1
OUT
R2
OUT
R1
IN
R2
IN
CMOS
INPUTS
CMOS
O
UTPUTS
EIA/TIA-232
OUTPUTS
EIA/TIA-232
INPUTS
*
GND
T1
T2
R1
R2
0.1µF
0.1µF
0.1µF
0.1µF
0.1µF
13
1
3
4
5
11
10
12
9
15
8
7
14
6
2
16
00066-004
Figure 4. ADM202E Typical Operating Circuit
*
INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT
C1+
C1–
C2+
C2–
V
CC
0.1µF
10V
10V
V+
V–
+5V TO +10V
VOLTAGE
DOUBLER
5V INPUT
C3
10V
+10V TO –10V
VOLTAGE
INVERTER
C4
0.1µF
10V
T1
OUT
T1
IN
C5
0.1µF
10V
T2
OUT
T2
IN
ADM1181A
R1
OUT
R2
OUT
R1
IN
R2
IN
CMOS
INPUTS
CMOS
O
UTPUTS
EIA/TIA-232
OUTPUTS
EIA/TIA-232
INPUTS
*
GND
T1
T2
R1
R2
0.1µF
0.1µF
13
1
3
4
5
11
10
12
9
15
8
7
14
6
2
16
00066-005
Figure 5. ADM1181A Typical Operating Circuit