MAX3485CPA中文资料
19-0333; Rev 0; 12/94
3.3V-Powered, 10Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers _______________General Description ____________________________Features
The *****, *****, *****, *****,*****, and ***** are 3.3V, low-power trans-oOperate from a Single 3.3V Supply―ceivers for RS-485 and RS-422 communication. EachNo Charge Pump!part contains one driver and one receiver. TheoInteroperable with +5V Logic
***** and ***** feature slew-rate-limited dri-vers that minimize EMI and reduce reflections causedo8ns Max Skew (*****/*****/*****)by improperly terminated cables, allowing error-freeoSlew-Rate Limited for Errorless Data Transmissiondata transmission at data rates up to 250kbps. The par-(*****/*****) tially slew-rate-limited ***** transmits up to2.5Mbps. The *****, *****, and *****o2nA Low-Current Shutdown Mode
transmit at up to 10Mbps.
(*****/*****/*****/*****)Drivers are short-circuit current limited and are protect-o-7V to +12V Common-Mode Input Voltage Rangeed against excessive power dissipation by thermalshutdown circuitry that places the driver outputs into aoAllows up to 32 Transceivers on the Bushigh-impedance state. The receiver input has a fail-safeoFull-Duplex and Half-Duplex Versions Availablefeature that guarantees a logic-high output if bothinputs are open circuit. oIndustry Standard ***** PinoutThe *****, *****, and ***** feature full-(*****/*****/*****)
duplex communication, while the *****, *****,oCurrent-Limiting and Thermal Shutdown forand ***** are designed for half-duplex communi-Driver Overload Protection cation.
________________________Applications ______________Ordering Information
Low-Power RS-485/RS-422 TransceiversTelecommunications Transceivers for EMI-Sensitive ApplicationsIndustrial-Control Local Area Networks
* Contact factory for for dice specifications.
______________________________________________________________Selection Table
**********SUPPLY SLEW-*****VER/**********DATA *****TAGE HALF/FULL(Mbps) (V) DUPLEX *****
***************BLE (nA)
*****X*****.25HalfYesYes28MAX*****HalfNoYes28MAX*****.5YesYes28MAX*****.253.0 to 3.6HalfFullYesNo―8MAX*****FullNoNo―8***** 10 Full No Yes 2 14
________________________________________________________________Maxim Integrated Products 1
Call toll free 1-800-998-8800 for free samples or literature. *****/*****/*****/*****/*****/*****
3.3V-Powered, 10Mbps and Slew-Rate-LimitedTrue RS-485/RS-422 Transceivers
*****/*****/*****/*****/*****/***** *****E ***** *****
Supply Voltage (VCC)...............................................................7VDriver Input Voltage (DI).............................................-0.3V to 7VDriver Output Voltage (A, B, Y, Z)..........................-7.5V to 12.5VReceiver Input Voltage (A, B)................................-7.5V to 12.5VReceiver Output Voltage (RO)....................-0.3V to (VCC+ 0.3V)Continuous Power Dissipation (TA= +70°C)
8-Pin Plastic DIP (derate 9.09mW/°C above +70°C).....727mW8-Pin SO (derate 5.88mW/°C above +70°C)..................471mW
14-Pin Plastic DIP (derate 10mW/°C above +70°C)......800mW14-Pin SO (derate 8.33mW/°C above +70°C)................667mWOperating Temperature Ranges
MAX34_ _C_ _.......................................................0°C to +70°CMAX34_ _E_ _....................................................-40°C to +85°CStorage Temperature Range.............................-65°C to +160°CLead Temperature (soldering, 10sec).............................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functionaloperation of the device at these or any other conditions beyond those indicated in the operational sections of the
MAX3485CPA中文资料
