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ADM238L

更新时间： 2024-11-01 22:47:35
品牌 Logo 应用领域
亚德诺 - ADI 驱动器
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16页 367K
描述
+5 V Powered CMOS RS-232 Drivers/Receivers

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ADM238L 数据手册

 浏览型号ADM238L的Datasheet PDF文件第2页浏览型号ADM238L的Datasheet PDF文件第3页浏览型号ADM238L的Datasheet PDF文件第4页浏览型号ADM238L的Datasheet PDF文件第5页浏览型号ADM238L的Datasheet PDF文件第6页浏览型号ADM238L的Datasheet PDF文件第7页 
+5 V Powered  
CMOS RS-232 Drivers/Receivers  
a
ADM223/ADM230L–ADM241L  
AD M232L TYP ICAL O P ERATING CIRCUIT  
FEATURES  
Single 5 V Pow er Supply  
Meets All EIA-232-E and V.28 Specifications  
120 kB/ s Data Rate  
On-Board DC-DC Converters  
؎9 V Output Sw ing w ith +5 V Supply  
Sm all 1 ␮F Capacitors  
Low Pow er Shutdow n ≤1 ␮A  
Receivers Active in Shutdow n (ADM223)  
ESD > 2 kV  
؎30 V Receiver Input Levels  
Latch-Up FREE  
+5V INPUT  
1
3
4
16  
2
C1+ +5V TO +10V  
VOLTAGE  
V
CC  
V+  
1µF  
6.3V  
1µF  
6.3V  
1µF  
6.3V  
DOUBLER  
C1–  
C2+  
+10V TO –10V  
1µF  
16V  
V– 6  
VOLTAGE  
1µF  
16V  
5 C2–  
11  
INVERTER  
14  
7
T1  
T2  
T1  
T1  
OUT  
IN  
RS-232  
OUTPUTS  
TTL/CMOS  
INPUTS*  
10  
12  
9
T2  
T2  
OUT  
IN  
Plug-In Upgrade for MAX223/ 230-241  
Plug-In Upgrade for AD230–AD241  
R1  
R2  
13  
8
R1  
R2  
R1  
R2  
IN  
IN  
OUT  
TTL/CMOS  
OUTPUTS  
RS-232  
INPUTS**  
APPLICATIONS  
Com puters  
Peripherals  
Modem s  
OUT  
GND  
15  
ADM232L  
Printers  
Instrum ents  
*INTERNAL 400kΩ PULL-UP RESISTOR ON EACH TTL/CMOS INPUT  
**INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT  
All members of the ADM230L family, except the ADM231L  
and the ADM239L, include two internal charge pump voltage  
converters that allow operation from a single +5 V supply.  
T hese converters convert the +5 V input power to the ±10 V  
required for RS-232 output levels. T he ADM231L and  
ADM239L are designed to operate from +5 V and +12 V sup-  
plies. An internal +12 V to –12 V charge pump voltage con-  
verter generates the –12 V supply.  
GENERAL D ESCRIP TIO N  
T he 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. T he ADM223,  
ADM230L, ADM235L, ADM236L and ADM241L feature a  
low power shutdown mode that reduces power dissipation to  
less than 5 µW, making them ideally suited for battery powered  
equipment. T wo receivers remain enabled during shutdown on  
the ADM223. T he ADM233L and ADM235L do not require  
any external components and are particularly useful in applica-  
tions where printed circuit board space is critical.  
T he ADM2xxL is an enhanced upgrade for the AD2xx family  
featuring lower power consumption, faster slew rate and opera-  
tion with smaller (1 µF) capacitors.  
Table I. Selection Table  
No. of  
RS-232  
D rivers  
No. of  
RS-232  
Receivers  
Low P ower  
Shutdown  
(SD )  
TTL  
P art  
Num ber  
P ower  
Supply Voltage  
External  
Capacitors  
Three-State No. of  
EN  
P ins  
ADM223  
ADM230L +5 V  
ADM231L +5 V & +7.5 V to +13.2 V  
ADM232L +5 V  
ADM233L +5 V  
ADM234L +5 V  
ADM235L +5 V  
ADM236L +5 V  
ADM237L +5 V  
+5 V  
4
5
2
2
2
4
5
4
5
4
3
4
5
0
2
2
2
0
5
3
3
4
5
5
4
4
2
4
Yes (SD)  
Yes  
No  
No  
No  
Yes (EN)  
No  
No  
No  
No  
28  
20  
14  
16  
20  
16  
24  
24  
24  
24  
24  
28  
None  
4
None  
4
4
4
2
4
No  
No  
Yes  
Yes  
No  
No  
No  
Yes  
Yes  
No  
No  
Yes  
ADM238L +5 V  
ADM239L +5 V & +7.5 V to +13.2 V  
ADM241L +5 V  
Yes  
Yes  
REV. 0  
Inform ation furnished by Analog Devices is believed to be accurate and  
reliable. However, no responsibility is assum ed by Analog Devices for its  
use, nor for any infringem ents of patents or other rights of third parties  
which m ay result from its use. No license is granted by im plication or  
otherwise under any patent or patent rights of Analog Devices.  
One Technology Way, P.O. Box 9106, Norw ood, MA 02062-9106, U.S.A.  
Tel: 617/ 329-4700  
Fax: 617/ 326-8703  
World Wide Web Site: http:/ / w w w .analog.com  
© Analog Devices, Inc., 1997  
1234567...16

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