ADM3202/ADM3222/ADM1385
PIN FUNCTION DESCRIPTIONS
PIN CONNECTIONS DIP (N, R Packages)
EN
1
C1+
1
V+
2
C1–
3
C2+
4
16
V
CC
15
GND
14
T1
OUT
Mnemonic
V
CC
V+
V–
GND
C1+, C1–
Function
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. 0.1
µF
capacitor is recommended but larger
capacitors up to 47
µF
may be used.
External Capacitor 2 is connected between these
pins. 0.1
µF
capacitor is recommended but larger
capacitors up to 47
µF
may 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) Receiver Enable, Active Low. When
low, the receiver outputs are enabled. When high,
they are three-stated.
(ADM3222) Shutdown Control. Active Low.
When low, the charge pump is shut down and
the transmitter outputs are disabled.
(ADM1385) Shutdown Control. When low, the
charge pump is shut down and all transmitters
and receivers are disabled.
(ADM1385) Driver Disable. When low, the
charge pump is turned off and the transmitters
are disabled. The receivers remain active.
18
SD
17
V
CC
16
GND
C1+
2
V+
3
C1–
4
C2+
5
ADM3202
13
R1
IN
ADM3222
15
T1
OUT
TOP VIEW
C2–
5
(Not to Scale)
12
R1
OUT
V–
6
T2
OUT 7
R2
IN 8
11
T1
IN
10
T2
IN
9
TOP VIEW
14
R1
IN
(Not to Scale)
C2–
6
13
R1
OUT
V–
7
12
T1
IN
11
T2
IN
10
R2
OUT
T2
OUT 8
R2
IN 9
R2
OUT
C2+, C2–
PIN CONNECTIONS DIP (RS, RU Packages)
EN
1
C1+
2
V+
3
C1–
4
20
19
18
Tx
IN
Tx
OUT
Rx
IN
SD
V
CC
GND
T1
OUT
R1
IN
DD
1
C1+
2
V+
3
C1–
4
C2+
5
20
SD
19
V
CC
18
GND
C2+
5
ADM3222
(SSOP
TSSOP)
17
16
Rx
OUT
EN
TOP VIEW
15
R1
C2–
6
OUT
(Not to Scale)
14
NC
V–
7
T2
OUT 8
R2
IN 9
R2
OUT 10
13
12
11
16
R1
IN
TOP VIEW
15
C2–
6
R1
OUT
(Not to Scale)
14
T1
IN
V–
7
13
T2
IN
12
R2
OUT
11
NC
ADM1385
(SSOP)
17
T1
OUT
T1
IN
T2
IN
NC
T2
OUT 8
R2
IN 9
NC
10
SD
NC = NO CONNECT
NC = NO CONNECT
SD
DD
–4–
REV. A
AD [ ANALOG DEVICES ]
