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MAX3223ECTP-T

更新时间： 2024-11-19 13:10:31
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19-0306; Rev 6; 3/99  
1µA Supply-Current, True +3V to +5.5V  
RS-232 Transceivers with AutoShutdown  
_______________General Description  
____________________________Features  
ꢀ 1µA Supply Current Achieved with AutoShutdown  
ꢀ Small 0.1µF Capacitors  
The MAX3221/MAX3223/MAX3243 achieve 1µA supply  
current with Maxim’s revolutionary AutoShutdown™ fea-  
ture. When the MAX3221/MAX3223/MAX3243 do not  
sense a valid signal level on their receiver inputs, the  
on-board power supply and drivers shut down. This  
occurs if the RS-232 cable is disconnected or if the  
transmitters of the connected peripheral are turned off.  
The system turns on again when a valid level is applied  
to any RS-232 receiver input. As a result, the system  
saves power without changes to the existing BIOS or  
operating system.  
ꢀ True RS-232 Operation from V  
= +3.0V to +5.5V  
CC  
ꢀ Meets EIA/TIA-562 Specifications Down to 2.7V  
ꢀ Guaranteed 120kbps Data Rate  
ꢀ 6V/µs Min Guaranteed Slew Rate  
ꢀ Smallest Single-Supply RS-232 Transceiver  
(MAX3221)  
The MAX3221/MAX3223/MAX3243 transceivers are 3V-  
powered EIA/TIA-232 and V.28/V.24 communications  
interfaces intended for notebook computer applica-  
tions. A proprietary, high-efficiency, dual charge-pump  
power supply and a low-dropout transmitter combine to  
deliver true RS-232 performance from a single +3.0V to  
+5.5V supply. A guaranteed data rate of 120kbps pro-  
vides compatibility with popular software for communi-  
cating with personal computers.  
ꢀ Guaranteed Mouse Driveability (MAX3243)  
ꢀ Small TSSOP Package (MAX3223/MAX3243)  
________________________Applications  
Notebook, Subnotebook, and Palmtop Computers  
Battery-Powered Equipment  
Hand-Held Equipment  
Peripherals  
The MAX3221/MAX3223/MAX3243 require only 0.1µF  
capacitors in 3.3V operation, and can operate from input  
voltages ranging from +3.0V to +5.5V. They are ideal for  
3.3V-only systems, mixed 3.3V and 5.0V systems, or  
5.0V-only systems that require true RS-232 performance.  
Printers  
The MAX3221 is a 1-driver/1-receiver 16-pin SSOP ver-  
sion of the 20-pin MAX3223 (2-driver/2-receiver). The  
MAX3243 3-driver/5-receiver, complete serial port is  
ideal for notebook or subnotebook computers. The  
MAX3243 includes one complementary always-active  
receiver. This receiver can monitor an external device  
(such as a modem) in shutdown, without forward bias-  
______________Ordering Information  
PART  
TEMP. RANGE  
0°C to +70°C  
0°C to +70°C  
-40°C to +85°C  
-40°C to +85°C  
0°C to +70°C  
0°C to +70°C  
0°C to +70°C  
-40°C to +85°C  
-40°C to +85°C  
-40°C to +85°C  
0°C to +70°C  
0°C to +70°C  
0°C to +70°C  
-40°C to +85°C  
-40°C to +85°C  
-40°C to +85°C  
PIN-PACKAGE  
16 SSOP  
MAX3221CAE  
MAX3221CUE†  
MAX3221EAE  
MAX3221EUE†  
MAX3223CPP  
MAX3223CAP  
MAX3223CUP  
MAX3223EPP  
MAX3223EAP  
MAX3223EUP  
MAX3243CWI  
MAX3243CAI  
MAX3243CUI  
MAX3243EWI  
MAX3243EAI  
MAX3243EUI  
ing the protection diodes in a UART that may have V  
completely removed.  
CC  
16 TSSOP  
16 SSOP  
16 TSSOP  
20 Plastic DIP  
20 SSOP  
_____________________Selector Guide  
20 TSSOP  
20 Plastic DIP  
20 SSOP  
PART  
Tx  
Rx  
V
CC  
RANGE (V) AutoShutdown  
MAX3221  
MAX3223  
MAX3243  
1
2
3
1
2
5
3.0 to 5.5  
3.0 to 5.5  
3.0 to 5.5  
Yes  
Yes  
Yes  
20 TSSOP  
28 Wide SO  
28 SSOP  
Pin Configurations appear at end of data sheet.  
Typical Operating Circuits appear at end of data sheet.  
28 TSSOP  
28 Wide SO  
28 SSOP  
†Future product—contact factory for availability.  
AutoShutdown is a trademark of Maxim Integrated Products.  
28 TSSOP  
* Covered by U.S. Patent numbers 4,636,930; 4,679,134; 4,777,577; 4,797,899; 4,809,152; 4,897,774; 4,999,761; and other patents pending.  
________________________________________________________________ Maxim Integrated Products  
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.  
For small orders, phone 1-800-835-8769.  
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