0.1 μF, 5 V Powered CMOS
RS-232 Drivers/Receivers
ADM206/ADM207/ADM208/ADM211/ADM213
FEATURES
TYPICAL OPERATING CIRCUIT
5V INPUT
0.1 μF to 10 μF capacitors
120 kB/s data rate
12
14
V
CC
C1+
C1–
+5VTO +10V
VOLTAGE
DOUBLER
11
13
+
+
+
0.1
16V
μF
0.1μF
0.1μF
+
+
Two receivers active in shutdown (ADM213)
On-board dc-to-dc converters
9 V output swing with 5 V supply
Low power (15 mW)
6.3V
V+
V–
+10VTO –10V
VOLTAGE
INVERTER
15 C2+
17
0.1μF
16V
0.1
16V
μF
16
C2–
Low power shutdown ≤ 5 μW
30 V receiver input levels
Latch-up free
T1
T1
T2
T3
T4
R1
R2
R3
R4
R5
2
3
T1
7
6
IN
IN
IN
IN
OUT
OUT
OUT
OUT
IN
T2
T3
T4
T2
T3
T4
R1
R2
R3
R4
R5
TTL/CMOS
INPUTS
RS-232
OUTPUTS
1
Pin compatible to MAX206-211/213
20
21
8
1
28
9
APPLICATIONS
Computers
Peripherals
Modems
Printers
Instruments
R1
R2
R3
R4
R5
OUT
OUT
4
5
IN
TTL/CMOS
OUTPUTS
RS-232
INPUTS
27
23
26
22
19
24
OUT
OUT
OUT
EN
IN
IN
IN
2
18
25
SD
ADM211
GND
10
NOTES
1
INTERNAL 400k
Ω PULL-UP RESISTOR ON EACH TTL/CMOS INPUT.
2
INTERNAL 5k
Ω
PULL-DOWN RESIST OR ON EACH RS-232 INPUT.
Figure 1.
GENERAL DESCRIPTION
The ADM2xx family of line drivers/receivers is intended for all
EIA-232-E and V.28 communications interfaces, especially in
applications where ±±2 V is not available. The ADM206,
ADM2±±, and ADM2±3 feature a low power shutdown mode
that reduces power dissipation to less than 5 μW, making them
ideally suited for battery-powered equipment. The ADM2±3 has
an active low shutdown and an active high receiver-enable
control. Two receivers of the ADM2±3 remain active during
shutdown. This feature is useful for ring indicator monitoring.
All members of the ADM2xx family include two internal charge
pump voltage converters that allow operation from a single 5 V
supply. These parts convert the 5 V input power to the ±±0 V
required for RS-232 output levels.
Table 1. Selection Table
TTL Three-
Part
Number
Power Supply
Voltage
Number of RS-
232 Drivers
Number of
RS-232 Receivers Capacitors
External
Low Power
Shutdown (SD)
Number of Receivers
Active in Shutdown
EN
State
Yes
No
ADM206
ADM207
ADM208
ADM211
ADM213
5 V
5 V
5 V
5 V
5 V
4
5
4
4
4
3
3
4
5
5
4
4
4
4
4
Yes
No
No
Yes
0
0
0
0
2
No
Yes
SD
Yes (EN)
Yes (
)
Rev. D
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