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MAX3080

更新时间： 2024-01-13 19:57:11
品牌 Logo 应用领域
美信 - MAXIM /
页数 文件大小 规格书
20页 276K
描述
Fail-Safe, High-Speed 10Mbps, Slew-Rate-Limited RS-485/RS-422 Transceivers

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MAX3080 数据手册

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19-1138; Rev 1; 12/97  
Fa il-S a fe , Hig h -S p e e d (1 0 Mb p s ),  
S le w -Ra t e -Lim it e d RS -4 8 5 /RS -4 2 2 Tra n s c e ive rs  
–MAX3089  
Ge n e ra l De s c rip t io n  
Fe a t u re s  
The MAX3080–MAX3089 high-speed transceivers for  
RS-485/RS-422 communication contain one driver and  
one receiver. These devices feature fail-safe circuitry,  
which guarantees a logic-high receiver output when the  
receiver inputs are open or shorted. This means that  
the receiver output will be a logic high if all transmitters  
on a terminated bus are disabled (high impedance).  
The MAX3080/MAX3081/MAX3082 feature reduced  
slew-rate drivers that minimize EMI and reduce reflec-  
tions caused by improperly terminated cables, allowing  
e rror-fre e d a ta tra ns mis s ion up to 115kb p s . The  
MAX3083/MAX3084/MAX3085 offer higher driver out-  
put slew-rate limits, allowing transmit speeds up to  
500kbps. The MAX3086/MAX3087/MAX3088’s driver  
slew rates are not limited, making transmit speeds up  
to 10Mb p s p os s ib le . The MAX3089’s s le w ra te is  
selectable between 115kbps, 500kbps, and 10Mbps  
b y d riving a s e le c tor p in with a s ing le thre e -s ta te  
driver.  
♦ True Fail-Safe Receiver While Maintaining  
EIA/TIA-485 Compatibility  
♦ Enhanced Slew-Rate Limiting Facilitates  
Error-Free Data Transmission  
(MAX3080–MAX3085/MAX3089)  
♦ 1nA Low-Current Shutdown Mode (except  
MAX3081/MAX3084/MAX3087)  
♦ Pin-Selectable Full/Half-Duplex Operation  
(MAX3089)  
♦ Phase Controls to Correct for Twisted-Pair  
Reversal (MAX3089)  
♦ Allow Up to 256 Transceivers on the Bus  
Ap p lic a t io n s  
RS-422/RS-485 Communications  
Level Translators  
These transceivers typically draw 375µA of supply  
current when unloaded, or when fully loaded with the  
drivers disabled.  
Transceivers for EMI-Sensitive Applications  
Industrial-Control Local Area Networks  
All devices have a 1/8-unit-load receiver input imped-  
ance that allows up to 256 transceivers on the bus. The  
MAX3082/MAX3085/MAX3088 are intended for half-  
duplex communications, while the MAX3080/MAX3081/  
MAX3083/MAX3084/MAX3086/MAX3087 are intended  
for full-duplex communications. The MAX3089 is selec-  
table between half-duplex and full-duplex operation. It  
also features independently programmable receiver  
and transmitter output phase via separate pins.  
Ord e rin g In fo rm a t io n  
PART  
TEMP. RANGE  
0°C to +70°C  
0°C to +70°C  
-40°C to +85°C  
-40°C to +85°C  
PIN-PACKAGE  
14 Plastic DIP  
14 SO  
MAX3080CPD  
MAX3080CSD  
MAX3080EPD  
MAX3080ESD  
14 Plastic DIP  
14 SO  
Ordering Information continued on last page.  
S e le c t io n Ta b le  
Data  
Rate  
(Mbps)  
Slew  
Rate  
Limited  
Low-  
Power  
Shutdown  
Receiver/ Quiescent Transceivers  
Industry-  
Standard  
Pinout  
Half/Full  
Duplex  
Pin  
Count  
Part  
Driver  
Current  
(µA)  
On  
Enable  
Bus  
MAX3080  
MAX3081  
MAX3082  
MAX3083  
MAX3084  
MAX3085  
MAX3086  
MAX3087  
MAX3088  
Full  
Full  
Half  
Full  
Full  
Half  
Full  
Full  
Half  
0.115  
0.115  
0.115  
0.5  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
No  
Yes  
No  
Yes  
No  
375  
375  
375  
375  
375  
375  
375  
375  
375  
375  
256  
256  
256  
256  
256  
256  
256  
256  
256  
256  
14  
8
75180  
75179  
75176  
75180  
75179  
75176  
75180  
75179  
75176  
75180*  
Yes  
Yes  
No  
Yes  
Yes  
No  
8
14  
8
0.5  
0.5  
Yes  
Yes  
No  
Yes  
Yes  
No  
8
10  
14  
8
10  
No  
10  
No  
Yes  
Yes  
Yes  
Yes  
8
MAX3089 Selectable Selectable Selectable  
14  
*Pin-compatible with 75180, with additional features implemented using pins 1, 6, 8, and 13.  
________________________________________________________________ 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.  
1234567...20

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