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MAX3485C

更新时间： 2024-01-10 00:45:34
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美信 - MAXIM /
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17页 467K
描述
3.3V-Powered, 10Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers

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MAX3485C 数据手册

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MAX3483/MAX3485/MAX3486/  
MAX3488/MAX3490/MAX3491  
3.3V-Powered, 10Mbps and Slew-Rate-Limited  
True RS-485/RS-422 Transceivers  
_______________General Description  
____________________________Features  
The MAX3483, MAX3485, MAX3486, MAX3488,  
MAX3490, and MAX3491 are 3.3V, low-power trans-  
ceivers for RS-485 and RS-422 communication. Each  
part contains one driver and one receiver. The  
MAX3483 and MAX3488 feature slew-rate-limited dri-  
vers that minimize EMI and reduce reflections caused  
by improperly terminated cables, allowing error-free  
data transmission at data rates up to 250kbps. The par-  
tially slew-rate-limited MAX3486 transmits up to  
2.5Mbps. The MAX3485, MAX3490, and MAX3491  
transmit at up to 10Mbps.  
♦ Operate from a Single 3.3V Supply—  
No Charge Pump!  
♦ Interoperable with +5V Logic  
♦ 8ns Max Skew (MAX3485/MAX3490/MAX3491)  
♦ Slew-Rate Limited for Errorless Data Transmission  
(MAX3483/MAX3488)  
♦ 2nA Low-Current Shutdown Mode  
(MAX3483/MAX3485/MAX3486/MAX3491)  
♦ -7V to +12V Common-Mode Input Voltage Range  
♦ Allows up to 32 Transceivers on the Bus  
Drivers are short-circuit current limited and are protect-  
ed against excessive power dissipation by thermal  
shutdown circuitry that places the driver outputs into a  
high-impedance state. The receiver input has a fail-safe  
feature that guarantees a logic-high output if both  
inputs are open circuit.  
♦ Full-Duplex and Half-Duplex Versions Available  
♦ Industry Standard 75176 Pinout  
(MAX3483/MAX3485/MAX3486)  
The MAX3488, MAX3490, and MAX3491 feature full-  
duplex communication, while the MAX3483, MAX3485,  
and MAX3486 are designed for half-duplex communi-  
cation.  
♦ Current-Limiting and Thermal Shutdown for  
Driver Overload Protection  
______________Ordering Information  
________________________Applications  
PART  
TEMP. RANGE  
0°C to +70°C  
0°C to +70°C  
0°C to +70°C  
-40°C to +85°C  
-40°C to +85°C  
0°C to +70°C  
0°C to +70°C  
0°C to +70°C  
-40°C to +85°C  
-40°C to +85°C  
PIN-PACKAGE  
8 Plastic DIP  
8 SO  
Low-Power RS-485/RS-422 Transceivers  
MAX3483CPA  
MAX3483CSA  
MAX3483C/D  
MAX3483EPA  
MAX3483ESA  
MAX3485CPA  
MAX3485CSA  
MAX3485C/D  
MAX3485EPA  
MAX3485ESA  
Telecommunications  
Transceivers for EMI-Sensitive Applications  
Industrial-Control Local Area Networks  
Dice*  
8 Plastic DIP  
8 SO  
8 Plastic DIP  
8 SO  
Dice*  
8 Plastic DIP  
8 SO  
Ordering Information continued at end of data sheet.  
* Contact factory for for dice specifications.  
______________________________________________________________Selection Table  
GUARANTEED  
DATA RATE  
(Mbps)  
SUPPLY  
VOLTAGE  
(V)  
DRIVER/  
RECEIVER  
ENABLE  
SHUTDOWN  
CURRENT  
(nA)  
PART  
NUMBER  
HALF/FULL  
DUPLEX  
SLEW-RATE  
LIMITED  
PIN  
COUNT  
MAX3483  
MAX3485  
MAX3486  
MAX3488  
MAX3490  
MAX3491  
0.25  
10  
Half  
Half  
Half  
Full  
Full  
Full  
Yes  
No  
Yes  
Yes  
Yes  
No  
2
2
8
8
2.5  
0.25  
10  
Yes  
Yes  
No  
2
8
3.0 to 3.6  
—
—
2
8
No  
8
10  
No  
Yes  
14  
For pricing, delivery, and ordering information, please contact Maxim Direct  
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.  
19-0333; Rev 0; 12/94  
1234567...17

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