Image MAX3485
型号: MAX3485
厂商: Maxim Integrated Maxim Integrated
标准:
分类: 半导体
描述: 3.3V-powered, 10mbps and slew-rate-limited true RS-485/RS-422 transceivers
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19-0333; Rev 0; 12/94  
3 .3 V-P o w e re d , 1 0 Mb p s a n d S le w -Ra t e -Lim it e d  
Tru e RS -4 8 5 /RS -4 2 2 Tra n s c e ive rs  
5680/MAX3491  
_______________Ge n e ra l De s c rip t io n  
____________________________Fe a t u re s  
The MAX3483, MAX3485, MAX3486, MAX3488,  
MAX3490, and MAX3491 are 3.3V, low-power trans -  
ceivers for RS-485 and RS-422 communication. Each  
p a rt c onta ins one d rive r a nd one re c e ive r. 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-  
tia lly s le w-ra te -limite d MAX3486 tra ns mits up to  
2.5Mb p s . The MAX3485, MAX3490, a nd 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  
fe a ture tha t g ua ra nte e s a log ic -hig h outp ut if b oth  
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  
______________Ord e rin g In fo rm a t io n  
________________________Ap p lic a t io n s  
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  
Telecommunications  
MAX3483CPA  
MAX3483CSA  
MAX3483C/D  
MAX3483EPA  
MAX3483ESA  
MAX3485CPA  
MAX3485CSA  
MAX3485C/D  
MAX3485EPA  
MAX3485ESA  
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.  
______________________________________________________________S e le c t io n Ta b le  
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  
________________________________________________________________ Maxim Integrated Products  
1
Ca ll t o ll fre e 1 -8 0 0 -9 9 8 -8 8 0 0 fo r fre e s a m p le s o r lit e ra t u re .