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ADM2023E Datasheet(PDF) 5 Page - Analog Devices

Part No. ADM2023E
Description  EMI/EMC-Compliant, -15 kV, ESD-Protected RS-232 Line Drivers/Receivers
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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ADM202E/ADM1181A
Rev. C | Page 5 of 16
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
14
13
12
11
16
15
10
9
8
1
2
3
4
7
6
5
TOP VIEW
(Not to Scale)
C1+
R1IN
T1OUT
GND
VCC
V+
C1–
C2+
T2IN
T1IN
R1OUT
C2–
V–
T2OUT
R2IN
R2OUT
ADM202E
ADM1181A
Figure 3. Pin Configuration
Table 3. Pin Function Descriptions
Pin No.
Mnemonic
Description
16
VCC
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
TIN
Transmitter (Driver) Inputs. These inputs accept TTL/CMOS levels.
7, 14
TOUT
Transmitter (Driver) Outputs. These are RS-232 signal levels (typically ±9 V).
8, 13
RIN
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
ROUT
Receiver Outputs. These are CMOS output logic levels.
*INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT
C1+
C1–
C2+
C2–
VCC
10V
10V
V+
V–
+5V TO +10V
VOLTAGE
DOUBLER
5V INPUT
C3
6.3V
+10V TO –10V
VOLTAGE
INVERTER
C4
10V
T1OUT
T1IN
C5
T2OUT
T2IN
ADM202E
R1OUT
R2OUT
R1IN
R2IN
CMOS
INPUTS
CMOS
OUTPUTS
EIA/TIA-232
OUTPUTS
EIA/TIA-232
INPUTS
*
GND
T1
T2
R1
R2
0.1
µF
0.1
µF
0.1
µF
0.1
µF
0.1
µF
13
1
3
4
5
11
10
12
9
15
8
7
14
6
2
16
Figure 4. ADM202E Typical Operating Circuit
*INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT
C1+
C1–
C2+
C2–
VCC
0.1
µF
10V
10V
V+
V–
+5V TO +10V
VOLTAGE
DOUBLER
5V INPUT
C3
10V
+10V TO –10V
VOLTAGE
INVERTER
C4
0.1
µF
10V
T1OUT
T1IN
C5
0.1
µF
10V
T2OUT
T2IN
ADM1181A
R1OUT
R2OUT
R1IN
R2IN
CMOS
INPUTS
CMOS
OUTPUTS
EIA/TIA-232
OUTPUTS
EIA/TIA-232
INPUTS
*
GND
T1
T2
R1
R2
0.1
µF
0.1
µF
13
1
3
4
5
11
10
12
9
15
8
7
14
6
2
16
Figure 5. ADM1181A Typical Operating Circuit




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