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MAX3293：20Mbps, +3.3V, SOT23 RS-485/RS-422 Transmitters

±15kV ESD-Protected, 20Mbps +3.3V, SOT23 RS-485/RS-422 Transmitters

The MAX3293/MAX3294/MAX3295 low-power, high-speed 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 54Ω load, compliant with RS-485 specifications. The transmitter draws 5mA of supply current when unloaded, and 1µA in low-power 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.

Key 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) 1µA 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)

MAX3293, MAX3294, MAX3295: Typical Operating Circuit Applications/Uses Automotive Clock Distribution Industrial Control Point-of-Sale Equipment RS-422/RS-485 Communications Security Equipment Telecom Equipment

DataSheet

Parametrics

Quality and Environmental Data

• MAX3293.pdf

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