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MAX488

更新时间： 2024-11-30 22:55:19
品牌 Logo 应用领域
美信 - MAXIM /
页数 文件大小 规格书
16页 135K
描述
【15kV ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 Transceivers

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中文翻译

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MAX488 数据手册

 浏览型号MAX488的Datasheet PDF文件第2页浏览型号MAX488的Datasheet PDF文件第3页浏览型号MAX488的Datasheet PDF文件第4页浏览型号MAX488的Datasheet PDF文件第5页浏览型号MAX488的Datasheet PDF文件第6页浏览型号MAX488的Datasheet PDF文件第7页 
19-0410; Rev 3; 7/96  
±1 5 k V ES D-P ro t e c t e d , S le w -Ra t e -Lim it e d ,  
Lo w -P o w e r, RS -4 8 5 /RS -4 2 2 Tra n s c e ive rs  
35–9/MAX1487E  
_______________Ge n e ra l De s c rip t io n  
____________________________Fe a t u re s  
♦ ESD Protection: ±15kV—Human Body Model  
The MAX481E, MAX483E, MAX485E, MAX487E–MAX491E,  
and MAX1487E are low-power transceivers for RS-485 and  
RS-422 communications in harsh environments. Each driver  
output and receiver input is protected against ±15kV electro-  
static discharge (ESD) shocks, without latchup. These parts  
c onta in one d rive r a nd one re c e ive r. The MAX483E,  
MAX487E, MAX488E, and MAX489E feature reduced slew-  
rate drivers that minimize EMI and reduce reflections caused  
by improperly terminated cables, thus allowing error-free  
data transmission up to 250kbps. The driver slew rates of the  
MAX481E, MAX485E, MAX490E, MAX491E, and MAX1487E  
are not limited, allowing them to transmit up to 2.5Mbps.  
♦ Slew-Rate Limited for Error-Free Data  
Transmission (MAX483E/487E/488E/489E)  
♦ Low Quiescent Current:  
120µA (MAX483E/487E/488E/489E)  
230µA (MAX1487E)  
300µA (MAX481E/485E/490E/491E)  
♦ -7V to +12V Common-Mode Input Voltage Range  
♦ Three-State Outputs  
♦ 30ns Propagation Delays, 5ns Skew  
(MAX481E/485E/490E/491E/1487E)  
These transceivers draw as little as 120µA supply current  
when unloaded or when fully loaded with disabled drivers  
(s e e Se le c tion Ta b le ). Ad d itiona lly, the MAX481E,  
MAX483E, and MAX487E have a low-current shutdown  
mode in which they consume only 0.5µA. All parts operate  
from a single +5V supply.  
♦ Full-Duplex and Half-Duplex Versions Available  
♦ Allows up to 128 Transceivers on the Bus  
(MAX487E/MAX1487E)  
Drivers are short-circuit current limited, and are protected  
against excessive power dissipation by thermal shutdown  
circuitry that places their outputs into a high-impedance  
state. The receiver input has a fail-safe feature that guaran-  
tees a logic-high output if the input is open circuit.  
♦ Current Limiting and Thermal Shutdown for  
Driver Overload Protection  
The MAX487E and MAX1487E feature quarter-unit-load  
receiver input impedance, allowing up to 128 transceivers  
on the bus. The MAX488E–MAX491E are designed for full-  
duplex communications, while the MAX481E, MAX483E,  
MAX485E, MAX487E, and MAX1487E are designed for half-  
duplex applications. For applications that are not ESD sen-  
sitive se e the p in- a nd func tion-c ompa tible MAX481,  
MAX483, MAX485, MAX487–MAX491, and MAX1487.  
______________Ord e rin g In fo rm a t io n  
PART  
TEMP. RANGE  
0°C to +70°C  
PIN-PACKAGE  
8 Plastic DIP  
8 SO  
MAX481ECPA  
MAX481ECSA  
MAX481EEPA  
MAX481EESA  
0°C to +70°C  
-40°C to +85°C  
-40°C to +85°C  
8 Plastic DIP  
8 SO  
________________________Ap p lic a t io n s  
Low-Power RS-485 Transceivers  
Ordering Information continued on last page.  
Low-Power RS-422 Transceivers  
Level Translators  
Transceivers for EMI-Sensitive Applications  
Industrial-Control Local Area Networks  
______________________________________________________________S e le c t io n Ta b le  
RECEIVER/  
DRIVER  
ENABLE  
QUIESCENT  
CURRENT  
(µA)  
NUMBER OF  
TRANSMITTERS  
ON BUS  
PART  
NUMBER  
HALF/FULL DATA RATE SLEW-RATE LOW-POWER  
PIN  
COUNT  
DUPLEX  
(Mbps)  
LIMITED  
SHUTDOWN  
MAX481E  
MAX483E  
MAX485E  
MAX487E  
MAX488E  
MAX489E  
MAX490E  
MAX491E  
MAX1487E  
Half  
Half  
Half  
Half  
Full  
Full  
Full  
Full  
Half  
2.5  
0.25  
2.5  
No  
Yes  
No  
Yes  
Yes  
No  
Yes  
No  
No  
No  
No  
No  
Yes  
Yes  
Yes  
Yes  
No  
300  
120  
300  
120  
120  
120  
300  
300  
230  
32  
32  
8
8
32  
8
0.25  
0.25  
0.25  
2.5  
Yes  
Yes  
Yes  
No  
128  
32  
8
8
Yes  
No  
32  
14  
8
32  
2.5  
No  
Yes  
Yes  
32  
14  
8
2.5  
No  
128  
________________________________________________________________ Maxim Integrated Products  
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800  
1234567...16

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