ASM206E/ASM207E/ASM208E/ASM2±±E/ASM2±3E
5V INPUT
1
2
28
27
26
25
24
23
T3
T1
T2
T4
OUT
OUT
12
14
V
11
13
C1+
C1–
+
+
CC
+
+5V TO+10V
VOLTAGE
DOUBLER
R3
R3
OUT
IN
0.1µF
6.3V
0.1µF
16V
0.1µF
+
+
V+
3
OUT
OUT
4
R2
SHDN
EN
15
16
V– 17
C2+
C2–
IN
+10V TO –10V
VOLTAGE
INVERTER
0.1µF
16V
0.1µF
16V
5
R2
OUT
6
T2
T1
R4
1
IN
IN
IN
ADM213E
TOP VIEW
T1
IN
7
6
2
3
T1
T2
T3
T4
R1
R2
R3
R4
R5
T1
7
22 R4
1
1
OUT
OUT
(Not to Scale)
21
T4
R1
8
OUT
IN
IN
T2
IN
T2
OUT
R1
9
20 T3
IN
TTL/CMOS
RS-232
OUTPUTS
1
INPUTS
GND
10
11
19
18
17
16
15
R5
OUT
T3
IN
1
28
9
T3
20
21
8
OUT
V
R5
V–
1
IN
CC
T4
IN
T4
C1+ 12
OUT
13
14
V+
C2–
C2+
R1
R1
IN
OUT
OUT
C1–
R2
R3
1
4
5
R2
IN
ACTIVE IN SHUTDOWN.
Figure 10. ADM213E Pin Configuration
TTL/CMOS
OUTPUTS
RS-232
INPUTS
26
22
19
24
27
23
R3
IN
OUT
3
2
R4
R4
R5
3
OUT
IN
IN
18
25
R5
3
3
OUT
EN
SHDN
ADM213E
GND
10
1
INTERNAL 400kΩ PULL-UP RESISTOR ON EACH TTL/CMOS INPUT.
INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT.
ACTIVE IN SHUTDOWN.
2
3
Figure 11. ADM213E Typical Operating Circuit
Table 6. Pin Function Descriptions
Mnemonic
Function
VCC
Power Supply Input (5 V ± ±0ꢁ).
V+
V–
GND
Internally Generated Positive Supply (+ꢀ V nominal).
Internally Generated Negative Supply (−ꢀ V nominal).
Ground Pin. Must be connected to 0 V.
C±+, C±–
External Capacitor ± is connected between these pins. A 0.± μF capacitor is recommended, but larger capacitors (up to
47 μF) can be used.
C2+, C2–
TIN
External Capacitor 2 is connected between these pins. A 0.± μF capacitor is recommended, but larger capacitors (up to
47 μF) can be used.
Transmitter (Driver) Inputs. These inputs accept TTL/CMOS levels. An internal 400 kΩ pull-up resistor to VCC is connected on
each input.
TOUT
RIN
Transmitter (Driver) Outputs. These are RS-232 signal levels (typically ±ꢀ V).
Receiver Inputs. These inputs accept RS-232 signal levels. An internal 5 kΩ pull-down resistor to GND is connected on
each input.
ROUT
Receiver Outputs. These are TTL/CMOS output logic levels.
EN/EN
Receiver Enable (active high on ADM2±3E, active low on ADM2±±E). This input is used to enable/disable the receiver
outputs. With EN = low for the ADM2±±E (EN = high for the ADM2±3E), the receiver outputs are enabled. With EN = high
for the ADM2±±E (EN = low for the ADM2±3E), the receiver outputs are placed in a high impedance state. (See Table 3
and Table 4.)
SHDN/SHDN Shutdown Control (active low on ADM2±3E, active high on ADM2±±E). When the ADM2±±E is in shutdown, the charge
pump is disabled, the transmitter outputs are turned off, and all receiver outputs are placed in a high impedance state.
When the ADM2±3E is in shutdown, the charge pump is disabled, the transmitter outputs are turned off, and Receiver R± to
Receiver R3 are placed in a high impedance state; Receiver R4 and Receiver R5 on the ADM2±3E continue to operate
normally during shutdown. (See Table 3 and Table 4.) Power consumption for all parts reduces to 5 μW in shutdown.
Rev. E | Page 7 of 20
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