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ADM560_15

更新时间： 2024-02-16 12:26:03
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亚德诺 - ADI PC
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12页 247K
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Notebook PC Serial Port Drivers/Receivers

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ADM560_15 数据手册

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Ultralow Power +3.3 V, RS-232  
Notebook PC Serial Port Drivers/Receivers  
ADM560/ADM561  
FEATURES  
FUNCTIONAL BLOCK DIAGRAM  
+3.3V INPUT  
RS-232 compatible  
Operates with 3 V or 5 V logic  
Ultralow power CMOS: 1.3 mA operation  
Low power shutdown: 0.2 μA  
Suitable for serial port mice  
116 kbps data rate  
12  
14  
11  
13  
C1+  
C1–  
V
CC  
+3.3V TO +6.6V  
VOLTAGE  
+
+
1µF  
10V  
C3  
0.1µF  
+
1µF  
DOUBLER  
V+  
6.3V  
15  
16  
C2+  
C2–  
+6.6V TO –6.6V  
VOLTAGE  
INVERTER  
17  
V–  
1µF  
10V  
C4  
+
1µF  
10V  
1 μF charge pump capacitors  
Single +3 V to +3.6 V power supply  
Two receivers active in shutdown (ADM560)  
7
6
2
3
1
T1  
T2  
T3  
T4  
T1  
T2  
T3  
T1  
IN  
IN  
IN  
IN  
OUT  
OUT  
OUT  
OUT  
T2  
T3  
T4  
CMOS  
EIA/TIA-232  
OUTPUTS  
INPUTS  
20  
APPLICATIONS  
Notebook computers  
Peripherals  
Modems  
Printers  
21  
8
28  
9
T4  
R1  
R1  
R2  
R3  
R4  
R5  
R1  
R2  
R3  
R4  
R5  
OUT  
OUT  
OUT  
OUT  
OUT  
IN  
IN  
IN  
IN  
IN  
5
4
R2  
R3  
R4  
R5  
CMOS  
OUTPUTS  
Battery-operated equipment  
EIA/TIA-232  
INPUTS  
26  
22  
27  
23  
18  
25  
19  
24  
ADM560/  
ADM561  
SHDN (ADM560)  
SHDN (ADM561)  
EN (ADM560)  
EN (ADM561)  
GND  
10  
Figure 1.  
GENERAL DESCRIPTION  
The ADM560/ADM561 are four driver/five receiver interface  
devices designed to meet the EIA-232 standard and operate with  
a single +3.3 V power supply. The devices feature an on-board  
dc-to-dc converter, eliminating the need for dual 5 V power  
supplies. This dc-to-dc converter contains a voltage doubler  
and voltage inverter, both of which internally generate 6.6 V  
from the input +3.3 V power supply.  
device begins communication. The active receivers alert the  
processor, and then take the ADM560 out of shutdown mode.  
The ADM561 features active high shutdown and an active  
low receiver enable. In this device, all receivers are disabled  
in shutdown.  
The ADM560/ADM561 are fabricated using CMOS technology  
for minimal power consumption. They feature a high level of  
over-voltage protection and latch-up immunity. The receiver  
inputs can withstand up to 25 V levels. The transmitter inputs  
can be driven from either 3 V or 5 V logic levels. This allows  
operation in mixed 3 V/5 V power supply systems.  
The ADM560 and the ADM561 consume only 5 mW making  
them ideally suited for battery and other power-sensitive appli-  
cations. A shutdown facility is also provided to reduce the power  
to 0.66 μW.  
The ADM560 contains active low shutdown and an active high  
receiver enable signal. In shutdown mode, two receivers remain  
active, thereby allowing monitoring of peripheral devices. This  
feature allows the device to be shut down until a peripheral  
The ADM560/ADM561 are packaged in a 28-lead SOIC and  
a 28-lead SSOP package.  
Rev. B  
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 that may result from its use. Specifications subject to change without notice. No  
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.  
Trademarks and registeredtrademarks arethe property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700  
Fax: 781.461.3113  
www.analog.com  
©2006 Analog Devices, Inc. All rights reserved.  
 
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