EMI/EMC-Compliant, ±15 kV ESDProtected,
RS-232 Line Drivers/Receivers
ADM206E/ADM207E/ADM208E/ADM211E/ADM213E
Rev. E
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FEATURES
Complies with 89/336/EEC EMC directive
ESD protection to IEC 1000-4-2 (801-2)
Contact discharge: ±8 kV
Air-gap discharge: ±15 kV
Human body model: ±15 kV
EFT/burst immunity (IEC 1000-4-4)
Low EMI emissions (EN 55022)
Eliminates need for TransZorb® suppressors
230 kbps data rate guaranteed
Single 5 V power supply
Shutdown mode 1 μW
Plug-in upgrade for MAX2xxE
Space saving TSSOP package available
APPLICATIONS
Laptop computers
Notebook computers
Printers
Peripherals
Modems
GENERAL DESCRIPTION
The ADM2xxE is a family of robust RS-232 and V.28 interface
devices that operate from a single 5 V power supply. These pro-
ducts are suitable for operation in harsh electrical environments
and are compliant with the EU directive on electromagnetic
compatibility (EMC) (89/336/EEC). The level of emissions and
immunity are both in compliance. EM immunity includes ESD
protection in excess of ±15 kV on all I/O lines (IEC 1000-4-2),
fast transient burst protection (IEC 100044), and radiated
immunity (IEC 1000-4-3). EM emissions include radiated and
conducted emissions as required by Information Technology
Equipment EN 55022, CISPR 22.
All devices fully conform to the EIA-232-E and CCITT V.28
specifications and operate at data rates up to 230 kbps. Shut-
down and enable control pins are provided on some of the
products (see
Table 1).
The shutdown function on the ADM211E disables the charge
pump and all transmitters and receivers. On the ADM213E the
CONNECTION DIAGRAM
0.1µF
6.3V
+
+
0.1µF
5
INPUT
+
0.1µF
10V
0.1µF
10V
+
0.1µF
10V
+
T1
T2
T3
T4
R1
R2
R3
R4
R5
GND
ADM211E/
ADM213E
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
SHDN (ADM211E)
SHDN (ADM213E)
TTL/CMOS
INPUTS
1
TL/CMOS
OUTPUTS
RS-232
OUTPUTS
RS-232
INPUTS
2
1
INTERNAL 400kΩ PULL-UP RESISTOR ON EACH TTL/CMOS INPUT.
2
INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT.
C1+
C1–
C2+
C2–
V
CC
V+
V–
EN (ADM211E)
EN (ADM213E)
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
0068-001
+5V TO +10V
VOLTAGE
DOUBLER
+10V TO –10V
VOLTAGE
INVERTER
Figure 1.
charge pump, all transmitters, and three of the five receivers are
disabled. The remaining two receivers remain active, thereby
allowing monitoring of peripheral devices. This feature allows
the device to be shut down until a peripheral device begins
communication. The active receivers can alert the processor,
which can then take the ADM213E out of the shutdown mode.
Operating from a single 5 V supply, four external 0.1 μF
capacitors are required.
The ADM207E and ADM208E are available in 24-lead PDIP, SSOP,
available in 28-lead SSOP, TSSOP, and SOIC_W packages. All
products are backward compatible with earlier ADM2xx products,
facilitating easy upgrading of older designs.
Table 1. Selection Table
Model Supply Voltage Drivers Receivers ESD Protection Shutdown Enable Packages
ADM206E 5 V 4 3 ±15 kV Yes Yes RW-24
ADM207E 5 V 5 3 ±15 kV No No N-24-1, RW-24, RS-24, RU-24
ADM208E 5 V 4 4 ±15 kV No No N-24-1, RW-24, RS-24, RU-24
ADM211E 5 V 4 5 ±15 kV Yes Yes RW-28, RS-28, RU-28
ADM213E 5 V 4 5 ±15 kV
Yes (
SHDN
)
1
Yes (EN) RW-28, RS-28, RU-28
1
Two receivers active.
