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ADM208 Datasheet

  • ADM208

  • 0.1 μF, 5 V Powered CMOS RS-232 Drivers/Receivers

  • 17頁(yè)

  • AD

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a
FEATURES
0.1 F to 10 F Capacitors
120 kB/s Data Rate
2 Receivers Active in Shutdown (ADM213)
On-Board DC-DC Converters
9 V Output Swing with +5 V Supply
Low Power (15 mW)
Low Power Shutdown
鈮?
W
30 V Receiver Input Levels
Latch-Up FREE
Plug-In Upgrade for MAX205-211/213
APPLICATIONS
Computers
Peripherals
Modems
Printers
Instruments
0.1 F, +5 V Powered
CMOS RS-232 Drivers/Receivers
ADM205鈥揂DM211/ADM213
TYPICAL OPERATING CIRCUIT
+5V INPUT
12 C1+
14 C1鈥?/div>
15 C2+
16 C2鈥?/div>
+5V TO +10V
VOLTAGE
DOUBLER
+10V TO 鈥?0V
VOLTAGE
INVERTER
V
CC
11
V+ 13
V鈥?17
0.1碌F
16V
0.1碌F
6.3V
0.1碌F
16V
0.1碌F
0.1碌F
16V
T1
IN
T2 I
N
T3
IN
T4 I
N
R1
OUT
R2
OUT
TTL/CMOS
OUTPUTS
R3
OUT
R4
OUT
R5
OUT
EN
7
6
20
21
8
5
26
22
19
24
T1
T2
T3
T4
R1
R2
R3
R4
R5
GND
10
2
3
1
28
9
4
27
23
18
25
T1
OUT
T2
OUT
T3
OUT
T4
OUT
R1
IN
R2
IN
R3
IN
R4
IN
R5
IN
SD
RS-232
INPUTS**
TTL/CMOS
INPUTS*
RS-232
OUTPUTS
ADM211
*INTERNAL 400k鈩?PULL-UP RESISTOR ON EACH TTL/CMOS INPUT
**INTERNAL 5k鈩?PULL-DOWN RESISTOR ON EACH RS-232 INPUT
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
鹵
12 V is not available. The ADM205,
ADM206, ADM211 and ADM213 feature a low power shut-
down mode which reduces power dissipation to less than 5
碌W
making them ideally suited for battery powered equipment. The
ADM205 does not require any external components and is par-
ticularly useful in applications where printed circuit board space
is critical. 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, except the ADM209, in-
clude two internal charge pump voltage converters which allow
operation from a single +5 V supply. These converters convert
the +5 V input power to the
鹵
10 V required for RS-232 output
levels. The ADM209 is designed to operate from +5 V and
+12 V supplies. An internal +12 V to 鈥?2 V charge pump volt-
age converter generates the 鈥?2 V supply.
Table I. Selection Table
Part
Number
ADM205
ADM206
ADM207
ADM208
ADM209
ADM211
ADM213
Power
Supply Voltage
+5 V
+5 V
+5 V
+5 V
+5 V & +9 V to +13.2 V
+5 V
+5 V
No. of
RS-232
Drivers
5
4
5
4
3
4
4
No. of
RS-232
Receivers
5
3
3
4
5
5
5
External
Capacitors
None
4
4
4
2
4
4
Low Power
Shutdown
(SD)
Yes
Yes
No
No
No
Yes
Yes (SD)
TTL
Three-State
EN
Yes
Yes
No
No
Yes
Yes
Yes (EN)
No. of Receivers
Active in
Shutdown
0
0
0
0
0
0
2
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
漏 Analog Devices, Inc., 1994
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703

ADM208 PDF文件相關(guān)型號(hào)

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