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MAX3085E

更新时间： 2024-11-20 14:57:51
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亚德诺 - ADI /
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20页 236K
描述
±15kV ESD保护、失效保护、高速(10Mbps)、限摆率RS-485/RS-422收发器

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MAX3085E 数据手册

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19-1800; Rev 1; 5/06  
±±15k ESD-Protected, Fail-Safe, High-Speed (±0Mbps),  
Slew-Rate-Limited RS-481/RS-422 Transceivers  
–MAX3089E  
General Description  
Features  
The MAX3080E–MAX3089E are 15ꢀk electrostatic dis-  
charge (ESD)-protected, high-speed transceivers for RS-  
485/RS-422 communication that 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  
MAX3080E/MAX3081E/MAX3082E feature reduced  
slew-rate drivers that minimize EMI and reduce reflec-  
tions caused by improperly terminated cables, allowing  
error-free data transmission up to 115ꢀbps. The  
MAX3083E/MAX3084E/MAX3085E offer higher driver  
output slew-rate limits, allowing transmit speeds up to  
500ꢀbps. The MAX3086E/MAX3087E/ MAX3088Es’ dri-  
ver slew rates are not limited, maꢀing transmit speeds  
up to 10Mbps possible. The MAX3089E’s slew rate is  
selectable between 115ꢀbps, 500ꢀbps, and 10Mbps by  
driving a selector pin with a single three-state driver. All  
devices feature enhanced ESD protection. All transmitter  
outputs and receiver inputs are protected to 15ꢀk  
using the Human Body Model.  
♦ ESD Protection for RS-485 I/O Pins  
15kV, Human Body Model  
♦ True Fail-Safe Receiver While Maintaining  
EIA/TIA-485 Compatibility  
♦ Enhanced Slew-Rate Limiting Facilitates  
Error-Free Data Transmission  
(MAX3080E–MAX3085E/MAX3089E)  
♦ 1nA Low-Current Shutdown Mode (Except  
MAX3081E/MAX3084E/MAX3087E)  
♦ Pin-Selectable Full/Half-Duplex Operation  
(MAX3089E)  
♦ Phase Controls to Correct for Twisted-Pair  
Reversal (MAX3089E)  
♦ Allow Up to 256 Transceivers on the Bus  
Applications  
RS-422/RS-485 Communications  
Level Translators  
Transceivers for EMI-Sensitive Applications  
Industrial-Control Local Area Networꢀs  
These transceivers typically draw 375µA of supply  
current when unloaded, or when fully loaded with the dri-  
vers disabled.  
All devices have a 1/8-unit-load receiver input impedance  
that allows up to 256 transceivers on the bus. The  
MAX3082E/MAX3085E/MAX3088E are intended for half-  
duplex communications, while the MAX3080E/MAX3081E/  
MAX3083E/MAX3084E/MAX3086E/MAX3087E are  
intended for full-duplex communications. The MAX3089E  
is selectable between half-duplex and full-duplex opera-  
tion. It also features independently programmable  
receiver and transmitter output phase via separate pins.  
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  
PIN-PACKAGE  
14 SO  
MAX3080ECSD  
MAX3080ECPD  
MAX3080EESD  
MAX3080EEPD  
14 Plastic DIP  
14 SO  
14 Plastic DIP  
Ordering Information continued at end of data sheet.  
Selector Guide  
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  
MAX3080E  
MAX3081E  
MAX3082E  
MAX3083E  
MAX3084E  
MAX3085E  
MAX3086E  
MAX3087E  
MAX3088E  
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
MAX3089E 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 and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.  
For small orders, phone 1-800-835-8769.  
1234567...20

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