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The MAX3293/MAX3294/MAX3295 low-power, highspeed transmitters for RS-485/RS-422 communication operate from a single +3.3V power supply. These devices contain one differential transmitter. The MAX3295 transmitter operates at data rates up to 20Mbps, with an output skew of less than 5ns, and a guaranteed driver propagation delay below 25ns. The MAX3293 (250kbps) and MAX3294 (2.5Mbps) are slew-rate limited to minimize EMI and reduce reflections caused by improperly terminated cables.
The MAX3293/MAX3294/MAX3295 output level is guaranteed at +1.5V with a standard 54 load, compliant with RS-485 specifications. The transmitter draws 5mA of supply current when unloaded, and 1A in lowpower shutdown mode (DE = GND).
Hot-swap circuitry eliminates false transitions on the data cable during circuit initialization or connection to a live backplane, and short-circuit current limiting and thermalshutdown circuitry protect the driver against excessive power dissipation.
The MAX3293/MAX3294/MAX3295 are offered in a 6-pin SOT23 package, and are specified over the automotive temperature range.
MAX3293AUT Maximum Ratings
(All voltages referenced to GND, unless otherwise noted.) Supply Voltage (VCC)..............................................................+6V DE, DI .......................................................................-0.3V to +6V Y, Z .........................................................................-7V to +12.5V Maximum Continuous Power Dissipation (TA = +70°C) 6-Pin SOT23 (derate 6.25mW/°C above +70°C)...............500mW Operating Temperature Ranges MAX32_ _AUT.....................................................-40°C to +125°C Storage Temperature Range .............................-65°C to +160°C Junction Temperature ......................................................+160°C Lead Temperature (soldering, 10s) .................................+300°C
MAX3293AUT Features
` Space-Saving 6-Pin SOT23 Package ` 250kbps/2.5Mbps/20Mbps Data Rates Available ` Operate from a Single +3.3V Supply ` ESD Protection ±9kV-Human Body Model ` Slew-Rate Limited for Errorless Data Transmission (MAX3293/MAX3294) ` 1A Low-Current Shutdown Mode ` -7V to +12V Common-Mode Input Voltage Range ` Current Limiting and Thermal Shutdown for Driver-Overload Protection ` Hot-Swap Inputs for Telecom Applications ` Automotive Temperature Range (-40°C to +125°C
MAX3293AUT Typical Application
· RS-485/RS-422 Communications · Clock Distribution · Telecom Equipment · Automotive · Security Equipment · Point-of-Sale Equipment · Industrial Contro