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MAX3212

更新时间： 2024-11-28 14:57:43
品牌 Logo 应用领域
亚德诺 - ADI 驱动驱动器
页数 文件大小 规格书
12页 246K
描述
+2.7V至+3.6V供电、1μA电源电流、3驱动器/5接收器、真RS-232收发器

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中文翻译

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MAX3212 数据手册

 浏览型号MAX3212的Datasheet PDF文件第2页浏览型号MAX3212的Datasheet PDF文件第3页浏览型号MAX3212的Datasheet PDF文件第4页浏览型号MAX3212的Datasheet PDF文件第5页浏览型号MAX3212的Datasheet PDF文件第6页浏览型号MAX3212的Datasheet PDF文件第7页 
19-0312; Rev 0; 9/94  
+2 .7 V t o +3 .6 V-P o w e re d , 1 µA S u p p ly Cu rre n t ,  
3 -Drive r/5 -Re c e ive r, Tru e RS -2 3 2 Tra n s c e ive r  
MAX312  
_______________Ge n e ra l De s c rip t io n  
____________________________Fe a t u re s  
The MAX3212 uses Maxim’s new proprietary Auto-  
Shutdown mode to reduce supply current to 1µA. The  
MAX3212, with 3 RS-232 drivers and 5 RS-232 receivers,  
is intended for 2.7V to 3.6V-powered EIA/TIA-232E and  
V.28/V.24 serial interface. True RS-232 levels are main-  
tained across the operating range. A guaranteed data  
rate of 235kbps provides compatibility with popular soft-  
ware for communicating with personal computers.  
BETTER THAN BIPOLAR!  
♦ 1µA Supply Current Using AutoShutdown  
♦ Operates from Single +2.7V to +3.6V Supply  
♦ 28-Pin SSOP or Wide SO Packages  
♦ Meets All EIA/TIA-232E & EIA/TIA-562 Specifications  
♦ Mouse Driveability–Guaranteed  
♦ Low-Cost, Surface-Mount External Components  
♦ 235kbps Guaranteed Data Rate–  
LapLink™ Compatible  
♦ +5V Logic Compatible  
*
Supply current is reduced to 1 µA with Maxim’s new  
AutoShutdown feature. When the MAX3212 does not  
sense a valid signal level on the receiver inputs, the on-  
board power supply and drivers shut down. This occurs  
if the RS-232 cable is disconnected or if the transmit-  
ters of the connected peripheral are turned off. The sys-  
tem 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 software.  
♦ Complementary Receiver Output Always Active  
♦ Flow-Through Pinout  
__________Typ ic a l Op e ra t in g Circ u it  
15µH 1N6050  
0.68µF 1N6050  
+3.0V  
0.33µF  
0.33µF  
3
27  
1
2
16  
A second power-management feature is incorporated to  
permit automatic shutdown when the RS-232 connection  
is valid but inactive. In this case, a transition detector  
facilitates shutdown when the receivers are presented  
with stationary RS-232 levels for long periods.  
V
CC  
V+ LN  
LP  
V-  
26  
25  
FORCEON  
FORCEOFF  
TRAN  
+3.0V  
5
6
MAX3212  
INVALID  
T1IN  
Three-state drivers are provided on receiver outputs so  
that multiple receivers, generally of different interface  
standards, can be wire-ORed at the UART. The  
MAX3212 is available in 28-pin SO and SSOP packages.  
13  
14  
19  
18  
T1OUT  
T2OUT  
T1  
T2  
T2IN  
15  
8
17  
24  
T3IN  
T3OUT  
R1IN  
T3  
R1  
R1OUT  
________________________Ap p lic a t io n s  
5k  
Notebook and Palmtop Computers  
Peripherals  
9
23  
22  
21  
R2OUT  
R3OUT  
R4OUT  
R2IN  
R3IN  
R4IN  
R5IN  
R2  
R3  
R4  
5k  
5k  
5k  
Instruments  
10  
Battery-Powered Equipment  
11  
______________Ord e rin g In fo rm a t io n  
12  
7
20  
R5OUT  
PART  
TEMP. RANGE  
0°C to +70°C  
PIN-PACKAGE  
28 Wide SO  
28 SSOP  
R5  
R5  
MAX3212CWI  
MAX3212CAI  
MAX3212EWI  
MAX3212EAI  
R5OUTB  
0°C to +70°C  
5k  
-40°C to +85°C  
-40°C to +85°C  
28 Wide SO  
28 SSOP  
EN  
4
GND  
28  
+3.0V  
AUTOSHUTDOWN OPERATION  
FORCEOFF = HIGH, FORCEON = LOW  
RS-232 Present  
Status  
On  
Shut Down  
Yes  
No  
Pin Configuration appears at end of data sheet.  
* ng  
________________________________________________________________ Maxim Integrated Products  
1
Ca ll t o ll fre e 1 -8 0 0 -9 9 8 -8 8 0 0 fo r fre e s a m p le s o r lit e ra t u re .  
1234567...12

中文翻译

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