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MAX13485E

更新时间： 2024-11-14 04:42:07
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美信 - MAXIM /
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16页 277K
描述
Half-Duplex RS-485/RS-422 Transceivers in uDFN

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MAX13485E 数据手册

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19-0742; Rev 0; 1/07  
Half-Duplex RS-485/RS-422 Transceivers in µDFN  
General Description  
Features  
The MAX13485E/MAX13486E +5V, half-duplex, 15ꢀV  
ESD-protected RS-485 transceivers feature one driver  
and one receiver. These devices include fail-safe circuitry,  
guaranteeing a logic-high receiver output when receiver  
inputs are open or shorted. The receiver outputs a logic-  
high if all transmitters on a terminated bus are disabled  
(high impedance). The MAX13485E/MAX13486E include  
a hot-swap capability to eliminate false transitions on the  
bus during power-up or live-insertion.  
ꢀ +5V Operation  
ꢀ True Fail-Safe Receiver While Maintaining  
EIA/TIA-485 Compatibility  
ꢀ Hot-Swappable for Telecom Applications  
ꢀ Enhanced Slew-Rate Limiting Facilitates Error-  
Free Data Transmission (MAX13485E)  
ꢀ High-Speed Version (MAX13488E) Allows for  
Transmission Speeds Up to 16Mbps  
The MAX13485E features reduced slew-rate drivers  
that minimize EMI and reduce reflections caused by  
improperly terminated cables, allowing error-free trans-  
mission up to 500ꢀbps. The MAX13486E driver slew  
rate is not limited, allowing transmit speeds up to  
16Mbps.  
ꢀ Extended ESD Protection for RS-485/RS-422 I/O  
Pins 15ꢀV Using Human ꢁody Model  
ꢀ 1/4 Unit Load, Allowing Up to 128 Transceivers on  
the ꢁus  
ꢀ Available in Space-Saving 8-Pin µDFN or Industry  
Standard 8-Pin SO Pacꢀages  
The MAX13485E/MAX13486E feature a 1/4-unit load  
receiver input impedance, allowing up to 128 transceivers  
on the bus. These devices are intended for half-duplex  
communications. All driver outputs are protected to 15ꢀV  
ESD using the Human Body Model. The MAX13485E/  
MAX13486E are available in 8-pin SO and space-saving  
8-pin µDFN pacꢀages. The devices operate over the  
extended -40°C to +85°C temperature range.  
Ordering Information/  
Selector Guide  
PIN-  
PACKAGE  
SLEW-RATE  
LIMITED  
PKG  
CODE  
PART  
MAX13485EELA+T 8 µDFN  
MAX13485EESA+ 8 SO  
MAX13486EELA+T 8 µDFN  
MAX13486EESA+ 8 SO  
+Denotes a lead-free package.  
Yes  
Yes  
No  
L822-1  
S8-2  
Applications  
L822-1  
S8-2  
Utility Meters  
No  
Industrial Controls  
Industrial Motor Drives  
Automated HVAC Systems  
Note: All devices are specified over the -40°C to +85°C operating  
temperature range.  
Pin Configurations  
TOP VIEW  
V
B
7
A
6
GND  
5
CC  
8
MAX13485E  
MAX13486E  
DE  
+
0.1µF  
+
1
2
3
4
8
1
2
V
RO  
RE  
DE  
DI  
CC  
D
R
DI  
7
B
A
B
A
RO  
RE  
DE  
DI  
Rt  
Rt  
DFN  
3
4
6
5
+
D
RO  
R
RO  
RE  
DE  
DI  
1
2
3
4
R
8
7
6
5
V
B
A
CC  
GND  
SO  
MAX13485E  
MAX13486E  
RE  
D
GND  
SO  
________________________________________________________________ Maxim Integrated Products  
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at  
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.  
1234567...16

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