ADM3202/ADM3222/ADM1385
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
PIN CONFIGURATIONS (N, R, RU, AND RW PACKAGES)
C1+
V+
C1–
C2+
C2–
V–
T2
OUT
R2
IN
1
2
3
4
5
6
7
8
16
15
V
CC
GND
T1
OUT
R1
IN
R1
OUT
T1
IN
00071-004
EN
C1+
V+
C1–
C2+
C2–
V–
T2
OUT
R2
IN
1
2
3
4
5
6
7
8
9
18
17
SD
V
CC
GND
T1
OUT
R1
IN
R1
OUT
T1
IN
R2
OUT
00071-005
ADM3202
TOP VIEW
(Not to Scale)
14
13
12
11
10
9
ADM3222
TOP VIEW
(Not to Scale)
16
15
14
13
12
11
10
T2
IN
R2
OUT
T2
IN
Figure 4. N, R, RU, and RW Packages Pin Configuration
Figure 5. N and RW Packages Pin Configuration
PIN CONFIGURATIONS (RS AND RU PACKAGES)
EN
1
C1+
2
V+
3
C1–
4
20
19
SD
V
CC
GND
T1
OUT
R1
IN
R1
OUT
NC
T1
IN
T2
IN
00071-006
DD
1
C1+
2
V+
3
C1–
4
C2+
5
C2–
6
V–
7
T2
OUT 8
R2
IN 9
NC
10
NC = NO CONNECT
20
SD
19
V
CC
18
GND
17
T1
OUT
16
R1
IN
15
R1
OUT
14
T1
IN
13
T2
IN
12
R2
OUT
00071-007
ADM3222
(SSOP/TSSOP)
TOP VIEW
(Not to Scale)
18
17
16
15
14
13
12
11
ADM1385
(SSOP)
TOP VIEW
(Not to Scale)
C2+
5
C2–
6
V–
7
T2
OUT 8
R2
IN 9
R2
OUT 10
11
NC
NC
NC = NO CONNECT
Figure 6. RS and RU Packages Pin Configuration
Figure 7. RS Package Pin Configuration
Table 3. Pin Function Descriptions
Mnemonic
V
CC
V+
V–
GND
C1+, C1–
C2+, C2–
Tx
IN
Tx
OUT
Rx
IN
Rx
OUT
EN
SD
SD
DD
NC
Description
Power Supply Input (3.3 V ± 0.3 V).
Internally Generated Positive Supply (+6 V nominal).
Internally Generated Negative Supply (−6 V nominal).
Ground Pin. Must be connected to 0 V.
External Capacitor 1 is connected between these pins. A 0.1 μF capacitor is recommended but larger capacitors up to 47 μF
can be used.
External Capacitor 2 is connected between these pins. A 0.1 μF capacitor is recommended but larger capacitors up to 47 μF
can be used.
Transmitter (Driver) Inputs. These inputs accept TTL/CMOS levels.
Transmitter (Driver) Outputs. These are RS-232 signal levels (typically ±9 V).
Receiver Inputs. These inputs accept RS-232 signal levels. An internal 5 kΩ pull-down resistor to GND is connected on each input.
Receiver Outputs. These are CMOS output logic levels.
(ADM3222 only) Receiver Enable. Active low. When low, the receiver outputs are enabled. When high, they are three-stated.
(ADM3222 only) Shutdown Control. Active low. When low, the charge pump is shut down and the transmitter outputs
are disabled.
(ADM1385 only) Shutdown Control. When low, the charge pump is shut down and all transmitters and receivers are disabled.
(ADM1385 only) Driver Disable. When low, the charge pump is turned off and the transmitters are disabled. The receivers
remain active.
No Connect.
Rev. E | Page 5 of 16
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