MAX3293/MAX3294/MAX3295 19-2770 Rev 3 3/11 20Mbps, +3.3V, SOT23 RS-485/ RS-422 Transmitters General Description Features The MAX3293/MAX3294/MAX3295 low-power, high- Space-Saving 6-Pin SOT23 Package speed transmitters for RS-485/RS-422 communication 250kbps/2.5Mbps/20Mbps Data Rates Available operate from a single +3.3V power supply. These Operate from a Single +3.3V Supply devices contain one differential transmitter. The MAX3295 transmitter operates at data rates up to ESD Protection 20Mbps, with an output skew of less than 5ns, and a 9kVHuman Body Model guaranteed driver propagation delay below 25ns. The Slew-Rate Limited for Errorless Data MAX3293 (250kbps) and MAX3294 (2.5Mbps) are Transmission (MAX3293/MAX3294) slew-rate limited to minimize EMI and reduce reflections 1A Low-Current Shutdown Mode caused by improperly terminated cables. -7V to +12V Common-Mode Input Voltage Range The MAX3293/MAX3294/MAX3295 output level is guar- Current Limiting and Thermal Shutdown for anteed at +1.5V with a standard 54 load, compliant with RS-485 specifications. The transmitter draws 5mA Driver-Overload Protection of supply current when unloaded, and 1A in low- Hot-Swap Inputs for Telecom Applications power shutdown mode (DE = GND). Automotive Temperature Range (-40C to +125C) Hot-swap circuitry eliminates false transitions on the data cable during circuit initialization or connection to a live Ordering Information backplane, and short-circuit current limiting and thermal- shutdown circuitry protect the driver against excessive PART TEMP RANGE PIN-PACKAGE power dissipation. MAX3293AUT+T -40C to +125C 6 SOT23-6 The MAX3293/MAX3294/MAX3295 are offered in a MAX3294AUT+T -40C to +125C 6 SOT23-6 6-pin SOT23 package, and are specified over the MAX3295AUT+T -40C to +125C 6 SOT23-6 automotive temperature range. +Denotes a lead(Pb)-free/RoHS-compliant package. Applications T = Tape and reel. RS-485/RS-422 Communications Selector Guide Clock Distribution Telecom Equipment MAXIMUM SLEW- TOP PART DATA RATE RATE Automotive MARK (Mbps) LIMITED Security Equipment ABNI or MAX3293AUT+T 0.25 Yes Point-of-Sale Equipment ABVH ABNJ or Industrial Control MAX3294AUT+T 2.5 Yes ABVI ABNK or Typical Operating Circuit MAX3295AUT+T 20 No ABVJ 120 Z DI D R RO Y Pin Configuration appears at end of data sheet. DE MAX3293 MAX3280E MAX3294 MAX3281E MAX3295 MAX3283E MAX3284E Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.20Mbps, +3.3V, SOT23 RS-485/ RS-422 Transmitters ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND, unless otherwise noted.) Operating Temperature Ranges Supply Voltage (V ).............................................................+6V MAX32 AUT...............................................-40C to +125C CC DE, DI .......................................................................-0.3V to +6V Storage Temperature Range .............................-65C to +160C Y, Z .........................................................................-7V to +12.5V Junction Temperature .....................................................+160C Maximum Continuous Power Dissipation (T = +70C) Lead Temperature (soldering, 10s) .................................+300C A SOT23 (derate 8.2mW/C above +70C).................654.1mW Soldering Temperature (reflow) .......................................+260C Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (V = +3.3V 5%, T = T to T , unless otherwise noted. Typical values are at V = +3.3V and T = +25C.) (Notes 1, 2) CC A MIN MAX CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS POWER SUPPLY Supply Voltage V 3.135 3.300 3.465 V CC Supply Current in Normal I No load, DI = V or GND, DE = V 5mA Q CC CC Operation Supply Current in Shutdown Mode I No load, DE = GND 1 10 A SHDN DRIVER R = 50 (RS-422), 2.0 V CC T +85C A Figure 1, DE = V , CC Differential Driver Output V V OD DI = GND or V CC R = 27 (RS-485), 1.5 V CC T +85C A Change in Magnitude of Figure 1, R = 27 or 50, V 0.2 V OD Differential Output Voltage DE = V (Note 3) CC Driver Common-Mode Output Figure 1, R = 27 or 50, V -1 +3 V OC Voltage DE = V , DI = V or GND CC CC Change in Magnitude of Common- V Figure 1, R = 27 or 50 (Note 3) 0.2 V OC Mode Voltage DRIVER LOGIC Input High Voltage V DE, DI 2.0 V IH Input Low Voltage V DE, DI 0.8 V IL Input Current I DE, DI -2 +2 A IN Y, Z V = +12V -20 +20 IN DE = GND, Output Leakage I A O V = GND or CC V = -7V -20 +20 IN +3.3V (V - 1V) V +12V, output high +25 Driver Short-Circuit Foldback CC OUT I mA OSFD Output Current -7V V 1V, output high -25 OUT 0 V +12V, output low -250 Driver Short-Circuit OUT I mA OSD Output Current -7V V V , output high +250 OUT CC Thermal-Shutdown Threshold T 160 C TS Thermal-Shutdown Hysteresis T 40 C TSH ESD Protection Y, Z Human Body Model 9 kV 2 MAX3293/MAX3294/MAX3295