ADM1385 View Datasheet(PDF) - Analog Devices
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ADM1385 Datasheet PDF : 16 Pages
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ADM3202/ADM3222/ADM1385
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
PIN CONFIGURATIONS (N, R, RU, AND RW PACKAGES)
C1+ 1
V+ 2
C1– 3
C2+ 4
C2– 5
V– 6
T2OUT 7
R2IN 8
ADM3202
TOP VIEW
(Not to Scale)
16 VCC
15 GND
14 T1OUT
13 R1IN
12 R1OUT
11 T1IN
10 T2IN
9 R2OUT
Figure 4. N, R, RU, and RW Packages Pin Configuration
EN 1
C1+ 2
V+ 3
C1– 4
C2+ 5
C2– 6
V– 7
T2OUT 8
R2IN 9
ADM3222
TOP VIEW
(Not to Scale)
18 SD
17 VCC
16 GND
15 T1OUT
14 R1IN
13 R1OUT
12 T1IN
11 T2IN
10 R2OUT
Figure 5. N and RW Packages Pin Configuration
PIN CONFIGURATIONS (RS AND RU PACKAGES)
EN 1
20 SD
C1+ 2
19 VCC
V+ 3
18 GND
ADM3222
C1– 4 (SSOP/TSSOP) 17 T1OUT
C2+ 5
TOP VIEW
(Not to Scale)
16 R1IN
C2– 6
15 R1OUT
V– 7
14 NC
T2OUT 8
R2IN 9
R2OUT 10
13 T1IN
12 T2IN
11 NC
NC = NO CONNECT
Figure 6. RS and RU Packages Pin Configuration
DD 1
C1+ 2
V+ 3
C1– 4
C2+ 5
C2– 6
V– 7
T2OUT 8
R2IN 9
NC 10
ADM1385
(SSOP)
TOP VIEW
(Not to Scale)
20 SD
19 VCC
18 GND
17 T1OUT
16 R1IN
15 R1OUT
14 T1IN
13 T2IN
12 R2OUT
11 NC
NC = NO CONNECT
Figure 7. RS Package Pin Configuration
Table 3. Pin Function Descriptions
Mnemonic Description
VCC
Power Supply Input (3.3 V ± 0.3 V).
V+
Internally Generated Positive Supply (+6 V nominal).
V–
Internally Generated Negative Supply (−6 V nominal).
GND
Ground Pin. Must be connected to 0 V.
C1+, C1–
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.
C2+, C2–
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.
TxIN
Transmitter (Driver) Inputs. These inputs accept TTL/CMOS levels.
TxOUT
Transmitter (Driver) Outputs. These are RS-232 signal levels (typically ±9 V).
RxIN
RxOUT
EN
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.
SD
(ADM3222 only) Shutdown Control. Active low. When low, the charge pump is shut down and the transmitter outputs
are disabled.
SD
(ADM1385 only) Shutdown Control. When low, the charge pump is shut down and all transmitters and receivers are disabled.
DD
(ADM1385 only) Driver Disable. When low, the charge pump is turned off and the transmitters are disabled. The receivers
remain active.
NC
No Connect.
Rev. E | Page 5 of 16
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