0.1 μF, 5 V Powered CMOS
RS-232 Drivers/Receivers
ADM206/ADM207/ADM208/ADM211/ADM213
Rev. D
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FEATURES
0.1 μF to 10 μF capacitors
120 kB/s data rate
Two receivers active in shutdown (ADM213)
On-board dc-to-dc converters
±9 V output swing with 5 V supply
Low power (15 mW)
Low power shutdown ≤ 5 μW
±30 V receiver input levels
Latch-up free
Pin compatible to MAX206-211/213
APPLICATIONS
Computers
Peripherals
Modems
Printers
Instruments
TYPICAL OPERATING CIRCUIT
0.1
μ
F
6.3V
+
+
0.1
μ
F
5V INPUT
+
0.1
μ
F
16V
0.1
μ
F
16V
+
0.1
μ
F
16V
+
T1
T2
T3
T4
R1
R2
R3
R4
R5
GND
ADM211
T1
IN
T2
IN
T3
IN
T4
IN
R1
OUT
R2
OUT
R3
OUT
R4
OUT
R5
OUT
T1
OUT
T2
OUT
T3
OUT
T4
OUT
R1
IN
R2
IN
R3
IN
R4
IN
R5
IN
SD
TTL/CMOS
INPUTS
1
TTL/CMOS
OUTPUTS
RS-232
OUTPUTS
RS-232
INPUTS
2
+5VTO +10V
VO LTA GE
DOUBLER
+10VTO –10V
VO LTA GE
INVERTER
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.
C1+
C1–
C2+
C2–
V
CC
V+
V–
00067-0-001
EN
12
14
15
16
11
13
17
2
3
1
28
9
4
27
23
18
25
7
6
20
21
8
5
26
22
19
24
10
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 ±12 V is not available. The ADM206,
ADM211, and ADM213 feature a low power shutdown mode
that reduces power dissipation to less than 5 μW, making them
ideally suited for battery-powered equipment. The ADM213 has
an active low shutdown and an active high receiver-enable
control. Two receivers of the ADM213 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 ±10 V
required for RS-232 output levels.
Table 1. Selection Table
Part
Number
Power Supply
Voltage
Number of RS-
232 Drivers
Number of
RS-232 Receivers
External
Capacitors
Low Power
Shutdown (SD)
TTL Three-
State
EN
Number of Receivers
Active in Shutdown
ADM206 5 V 4 3 4 Yes Yes 0
ADM207 5 V 5 3 4 No No 0
ADM208 5 V 4 4 4 No No 0
ADM211 5 V 4 5 4 Yes Yes 0
ADM213 5 V 4 5 4
Yes (
SD
)
Yes (EN) 2
