MAX3293–MAX3295 20Mbps, +3.3V, SOT23 RS-485/ RS-422 Transmitters General Description 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 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 thermal-shutdown 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. RS-485/RS-422 Communications Clock Distribution Telecom Equipment Automotive Security Equipment Point-of-Sale Equipment Industrial Control ●● 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) Ordering Information PART TEMP RANGE PIN-PACKAGE MAX3293AUT+T -40°C to +125°C 6 SOT23-6 MAX3294AUT+T -40°C to +125°C 6 SOT23-6 MAX3295AUT+T -40°C to +125°C 6 SOT23-6 MAX3295AUT/V+T -40°C to +125°C 6 SOT23-6 Selector Guide MAXIMUM DATA RATE (Mbps) SLEWRATE LIMITED TOP MARK MAX3293AUT+T 0.25 Yes ABNI or ABVH MAX3294AUT+T 2.5 Yes ABNJ or ABVI MAX3295AUT+T 20 No ABNK or ABVJ MAX3295AUT/V+T 20 No +ACSB PART Typical Operating Circuit 120Ω DI ●● Space-Saving 6-Pin SOT23 Package +Denotes a lead(Pb)-free/RoHS-compliant package. T = Tape and reel. /V denotes automotive-qualified package. Applications ●● ●● ●● ●● ●● ●● ●● Features Z D Y R DE MAX3293 MAX3294 MAX3295 19-2770; Rev 4; 12/14 MAX3280E MAX3281E MAX3283E MAX3284E RO Pin Configuration appears at end of data sheet. MAX3293–MAX3295 20Mbps, +3.3V, SOT23 RS-485/ RS-422 Transmitters Absolute 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) SOT23 (derate 8.2mW/°C above +70°C)..................654.1mW 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 Soldering Temperature (reflow)........................................+260°C 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 (VCC = +3.3V ±5%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +3.3V and TA = +25°C.) (Notes 1, 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 3.135 3.300 3.465 V 5 mA 10 µA POWER SUPPLY Supply Voltage Supply Current in Normal Operation Supply Current in Shutdown Mode VCC IQ ISHDN No load, DI = VCC or GND, DE = VCC No load, DE = GND 1 DRIVER VOD R = 50W (RS-422), Figure 1, DE = VCC, TA ≤ +85°C DI = GND or VCC R = 27W (RS-485), TA ≤ +85°C Change in Magnitude of Differential Output Voltage ∆VOD Figure 1, R = 27W or 50W, DE = VCC (Note 3) Driver Common-Mode Output Voltage VOC Figure 1, R = 27W or 50W, DE = VCC, DI = VCC or GND Differential Driver Output Change in Magnitude of Common-Mode Voltage ∆VOC 2.0 VCC 1.5 V VCC -1 Figure 1, R = 27W or 50W (Note 3) 0.2 V +3 V 0.2 V DRIVER LOGIC Input High Voltage VIH DE, DI Input Low Voltage VIL DE, DI Input Current IIN DE, DI IO Y, Z DE = GND, VCC = GND or +3.3V Output Leakage Driver Short-Circuit Foldback Output Current IOSFD Driver Short-Circuit Output Current IOSD 2.0 V 0.8 V -2 +2 µA VIN = +12V -20 +20 VIN = -7V -20 +20 (VCC - 1V) ≤ VOUT ≤ +12V, output high µA +25 -7V ≤ VOUT ≤ 1V, output high 0 ≤ VOUT ≤ +12V, output low -25 -250 -7V ≤ VOUT ≤ VCC, output high +250 mA mA Thermal-Shutdown Threshold TTS 160 °C Thermal-Shutdown Hysteresis TTSH 40 °C ±9 kV ESD Protection www.maximintegrated.com Y, Z Human Body Model Maxim Integrated │ 2 MAX3293–MAX3295 20Mbps, +3.3V, SOT23 RS-485/ RS-422 Transmitters Switching Characteristics (MAX3293) (VCC = +3.3V ±5%, TA = +25°C, unless otherwise noted. Typical values are at VCC = +3.3V.) PARAMETER Driver Propagation Delay Driver Differential Output Rise or Fall Time Driver-Output Skew Differential Driver-Output Skew SYMBOL tPLH tPHL tR tF CONDITIONS MIN TYP MAX Figures 2, 3; RDIFF = 54W, CL = 50pF 400 1300 400 1300 Figures 2, 3; RDIFF = 54W, CL = 50pF 400 1200 400 1200 UNITS ns ns tSKEW Figures 2, 3; RDIFF = 54W, CL = 50pF, tSKEW = | tPLH - tPHL | (Note 5) -400 +400 ns tDSKEW Figures 2, 3; RDIFF = 54W, CL = 50pF -100 +100 ns Figures 2, 3; RDIFF = 54W, CL = 50pF 250 Maximum Data Rate kbps Driver Enable to Output High tZH Figures 4, 5; S2 closed, RL = 500W, CL = 100pF 2000 ns Driver Enable to Output Low tZL Figures 4, 5; S1 closed, RL = 500W, CL = 100pF 2000 ns Driver Disable Time from Low tLZ Figures 4, 5; S1 closed, RL = 500W, CL = 100pF 1000 ns Driver Disable Time from High tHZ Figures 4, 5; S2 closed, RL = 500W, CL = 100pF 1000 ns Same power supply, maximum temperature difference between devices = +30°C (Note 5) 900 ns MAX UNITS Device-to-Device Propagation Delay Matching Switching Characteristics (MAX3294) (VCC = +3.3V ±5%, TA = +25°C, unless otherwise noted. Typical values are at VCC = +3.3V.) PARAMETER Driver Propagation Delay Driver Differential Output Rise or Fall Time SYMBOL CONDITIONS MIN TYP tPLH 24 70 tPHL Figures 2, 3; RDIFF = 54W, CL = 50pF 24 70 tR 10 70 tF Figures 2, 3; RDIFF = 54W, CL = 50pF 10 70 ns ns tSKEW Figures 2, 3; RDIFF = 54W, CL = 50pF, tSKEW = | tPLH - tPHL | (Note 5) -40 +40 ns tDSKEW Figures 2, 3; RDIFF = 54W, CL = 50pF -6 +6 ns Maximum Data Rate Figures 2, 3; RDIFF = 54W, CL = 50pF 2.5 Driver Enable to Output High tZH Figures 4, 5; S2 closed, RL = 500W, CL = 100pF 400 ns Driver Enable to Output Low tZL Figures 4, 5; S1 closed, RL = 500W, CL = 100pF 400 ns Driver Disable Time from Low tLZ Figures 4, 5; S1 closed, RL = 500W, CL = 100pF 100 ns Driver Disable Time from High tHZ Figures 4, 5; S2 closed, RL = 500W, CL = 100pF 100 ns Same power supply, maximum temperature difference between devices = +30°C (Note 5) 46 ns Driver-Output Skew Differential Driver-Output Skew Device-to-Device Propagation Delay Matching www.maximintegrated.com Mbps Maxim Integrated │ 3 MAX3293–MAX3295 20Mbps, +3.3V, SOT23 RS-485/ RS-422 Transmitters Switching Characteristics (MAX3295) (VCC = +3.3V ±5%, TA = +25°C, unless otherwise noted. Typical values are at VCC = +3.3V.) PARAMETER Driver Propagation Delay Driver Differential Output Rise or Fall Time Driver-Output Skew Differential Driver-Output Skew SYMBOL tPLH tPHL tR tF CONDITIONS MIN TYP 25 Figures 2, 3; RDIFF = 54W, CL = 50pF Figures 2, 3; RDIFF = 54W, CL = 50pF MAX 25 TA = -40°C to +125°C UNITS ns 18.5 TA < +85°C 15 TA = -40°C to +125°C 18.5 TA < +85°C ns 15 tSKEW Figures 2, 3; RDIFF = 54W, CL = 50pF, tSKEW = | tPLH - tPHL | 5 ns tDSKEW Figures 2, 3; RDIFF = 54W, CL = 50pF 5 ns Maximum Data Rate Figures 2, 3; RDIFF = 54W, CL = 50pF, TA ≤ +85°C 20 Figures 2, 3; RDIFF = 54W, CL = 50pF 16 Mbps Driver Enable to Output High tZH Figures 4, 5; S2 closed, RL = 500W, CL = 100pF 400 ns Driver Enable to Output Low tZL Figures 4, 5; S1 closed, RL = 500W, CL = 100pF 400 ns Driver Disable Time from Low tLZ Figures 4, 5; S1 closed, RL = 500W, CL = 100pF 100 ns Driver Disable Time from High tHZ Figures 4, 5; S2 closed, RL = 500W, CL = 100pF 100 ns Device-to-Device Propagation Same power supply, maximum temperature 25 ns Delay Matching difference between devices = +30°C (Note 5) Note 1: Devices production tested at +25°C. Limits over the operating temperature range are guaranteed by design. Note 2: All currents into the device are positive; all currents out of the device are negative. All voltages are referenced to device ground, unless otherwise noted. Note 3: ∆VOD and ∆VOC are the changes in VOD and VOC, respectively, when the DI input changes state. Note 4: The maximum current applies to peak current just prior to foldback current limiting. Note 5: Guaranteed by design; not production tested. www.maximintegrated.com Maxim Integrated │ 4 MAX3293–MAX3295 20Mbps, +3.3V, SOT23 RS-485/ RS-422 Transmitters Test Circuits and Timing Diagrams Y R OUTPUT UNDER TEST VOD R CL VOC S2 Z Figure 1. Driver DC Test Load Figure 4. Enable/Disable Timing Test Load DE 3V DE DI 3V 0V Y VID CL RDIFF Z Y, Z VOL CL 1.5V 1.5V tZL(SHDN), tZL 0V 3V 0V Z Y VOL+ 0.25V OUTPUT NORMALLY HIGH 2.3V tZH(SHDN), tZH Figure 2. Driver Timing Test Circuit tLZ 2.3V OUTPUT NORMALLY LOW Y, Z DI VCC S1 RL VOH- 0.25V tHZ Figure 5. Driver Enable and Disable Times f = 1MHz, tR 3ns, tF 3ns 1.5V 1.5V tPLH tPHL 1/2 VO VO 1/2 VO VO VDIFF 0V -VO VDIFF = V (Y) - V (Z) 90% 90% 10% 10% tR tF tSKEW = | tPLH - tPHL | Figure 3. Driver Propagation Delays www.maximintegrated.com Maxim Integrated │ 5 MAX3293–MAX3295 20Mbps, +3.3V, SOT23 RS-485/ RS-422 Transmitters Typical Operating Characteristics (VCC = +3.3V, TA = +25°C, unless otherwise noted.) TA = +25C TA = -40C 0 0 5 10 15 0.5 0 20 -40 -10 DATA RATE (Mbps) 20 10 2.25 2.50 2.75 3.00 3.25 3.50 3.0 RDIFF = 100Ω 2.5 2.0 RDIFF = 54Ω 140 DRIVER-OUTPUT CURRENT vs. DRIVER-OUTPUT HIGH VOLTAGE -40 -10 20 50 80 -80 110 80 60 40 0 110 0 2 2 1 4 6 8 10 OUTPUT LOW VOLTAGE (V) 12 DRIVER PROPAGATION DELAY vs. TEMPERATURE MAX3293-95 toc08 3 OUTPUT SKEW (ns) -60 80 20 4 MAX3293-95 toc07 -40 50 100 OUTPUT SKEW vs. TEMPERATURE -20 20 120 1.5 1.0 MAX3293-95 toc03 -10 DRIVER-OUTPUT CURRENT vs. DRIVER-OUTPUT LOW VOLTAGE TEMPERATURE (C) 0 OUTPUT CURRENT (mA) -40 TEMPERATURE (C) 3.5 DIFFERENTIAL OUTPUT VOLTAGE (V) 20 0.4 0 110 MAX3293-95 toc05 MAX3293-95 toc04 30 1.75 2.00 80 DRIVER DIFFERENTIAL OUTPUT VOLTAGE vs. TEMPERATURE DIFFERENTIAL OUTPUT VOLTAGE (V) OUTPUT CURRENT (mA) 40 0 50 0.8 TEMPERATURE (C) OUTPUT CURRENT vs. DIFFERENTIAL OUTPUT VOLTAGE 50 20 1.2 MAX3293-95 toc06 5 1.0 DE = GND 1.6 OUTPUT CURRENT (mA) 10 1.5 2.0 SUPPLY CURRENT (µA) 15 DE = VCC NO LOAD NO SWITCHING 40 PROPAGATION DELAY (ns) SUPPLY CURRENT (mA) SUPPLY CURRENT (mA) TA = +85C TA = +125C MAX3293-95 toc02 DE = VCC NO LOAD 20 2.0 MAX3293-95 toc01 25 SHUTDOWN SUPPLY CURRENT vs. TEMPERATURE SUPPLY CURRENT vs. TEMPERATURE MAX3293-95 toc09 MAX3295 SUPPLY CURRENT vs. DATA RATE RDIFF = 54Ω CL = 50pF 30 tPHL 20 tPLH 10 -100 -120 -7 -5 -3 -1 1 3 OUTPUT HIGH VOLTAGE (V) www.maximintegrated.com 5 0 -40 -10 20 50 80 TEMPERATURE (C) 110 0 -40 -10 20 50 80 110 TEMPERATURE (C) Maxim Integrated │ 6 MAX3293–MAX3295 20Mbps, +3.3V, SOT23 RS-485/ RS-422 Transmitters Typical Operating Characteristics (continued) (VCC = +3.3V, TA = +25°C, unless otherwise noted.) DRIVER PROPAGATION DELAY UNLOADED DRIVER-OUTPUT WAVEFORM (fIN = 16Mbps) ENABLE RESPONSE TIME MAX3293-95 toc10 MAX3293-95 toc12 MAX3293-95 toc11 DI DE 0V 0V Y-Z 0V Y, Z Y, Z 0V 0V Y, Z: 1V/div DI: 2V/div 20ns/div 40ns/div LOADED DRIVER-OUTPUT WAVEFORM (fIN = 16Mbps) EYE DIAGRAM (fIN = 20Mbps) MAX3293-95 toc13 MAX3293-95 toc14 Y, Z Y, Z 0V 0V Y, Z: 500mV/div 20ns/div 20ns/div Y, Z: 1V/div Y, Z, DE: 2V/div Y, Z: 500mV/div 10ns/div Pin Description PIN NAME FUNCTION 1 DI Driver Input. A logic low on DI forces the noninverting output (Y) low and the inverting output (Z) high. A logic high on DI forces the noninverting output (Y) high and the inverting output (Z) low. 2 VCC 3 DE 4 Z 5 GND 6 Y www.maximintegrated.com Positive Supply. VCC = +3.3V ±5%. Bypass VCC to GND with a 0.1µF capacitor. Driver Output Enable. Force DE high to enable driver. Pull DE low to disable the driver. Hot-swap input, see the Hot-Swap Capability section. Inverting RS-485/RS-422 Output Ground Noninverting RS-485/RS-422 Output Maxim Integrated │ 7 MAX3293–MAX3295 20Mbps, +3.3V, SOT23 RS-485/ RS-422 Transmitters Detailed Description The MAX3293/MAX3294/MAX3295 are low-power transmitters for RS-485/RS-422 communication. The MAX3295 operates at data rates up to 20Mbps, the MAX3294 up to 2.5Mbps (slew-rate limited), and the MAX3293 up to 250kbps (slew-rate limited). These devices are enabled using an active-high driver enable (DE) input. When disabled, outputs enter a high-impedance state, and the supply current reduces to 1µA. cause coupling of VCC or GND to DE. These factors could improperly enable the driver. The MAX3293/MAX3294/MAX3295 eliminate all above issues with hot-swap circuitry. When VCC rises, an internal pulldown circuit holds DE low for approximately 10µs. After the initial power-up sequence, the pulldown circuit becomes transparent, resetting the hot-swap tolerable input. The MAX3293/MAX3294/MAX3295 have a hot-swap input structure that prevents disturbance on the differential signal lines when a circuit board is plugged into a “hot” backplane (see the Hot-Swap Capability section). Drivers are also short-circuit current limited and are protected against excessive power dissipation by thermal-shutdown circuitry. VCC 10µs TIMER Driver The driver accepts a single-ended, logic-level input (DI) and translates it to a differential RS-485/RS-422 level output (Y and Z). Driving DE high enables the driver, while pulling DE low places the driver outputs (Y and Z) into a high-impedance state (see Table 1). Low-Power Shutdown Force DE low to disable the MAX3293/MAX3294/ MAX3295. In shutdown mode, the device consumes a maximum of 10µA of supply current. TIMER 5.6kΩ EN DE (HOT SWAP) 2mA 100µA M1 Hot-Swap Capability M2 Hot-Swap Input When circuit boards are inserted into a “hot” or powered backplane, disturbances to the enable can lead to data errors. Upon initial circuit board insertion, the processor undergoes its power-up sequence. During this period, the output drivers are high impedance and are unable to drive the DE input of the MAX3293/ MAX3294/MAX3295 to a defined logic level. Leakage currents up to 10µA from the high-impedance output could cause DE to drift to an incorrect logic state. Additionally, parasitic circuit board capacitance could Table 1. MAX3293/MAX3294/ MAX3295 (RS-485/RS-422) Transmitting Function Table INPUTS OUTPUTS DE DI Y Z 0 X Shutdown Shutdown 1 0 0 1 1 X = Don’t care. 1 1 0 www.maximintegrated.com Figure 6. Simplified Structure of the Driver Enable Input (DE) DIFFERENTIAL POWER-UP GLITCH (0.1V/µs) 2V/div VCC 0V Y 10mV/div AC-COUPLED Z 10mV/div AC-COUPLED 20mV/div Y-Z 4µs/div Figure 7. Differential Power-Up Glitch (0.1V/µs) Maxim Integrated │ 8 MAX3293–MAX3295 20Mbps, +3.3V, SOT23 RS-485/ RS-422 Transmitters Hot-Swap Input Circuitry The MAX3293/MAX3294/MAX3295 enable input features hot-swap capability. At the input, there are two NMOS devices, M1 and M2 (Figure 6). When VCC ramps from zero, an internal 10µs timer turns on M2 and sets the SR latch, which also turns on M1. Transistors M2, a 2mA current sink, and M1, a 100µA current sink, pull DE to GND through a 5.6kΩ resistor. M2 is designed to pull DE to the disabled state against an external parasitic capacitance up to 100pF that may drive DE high. After 10µs, the timer deactivates M2 while M1 remains on, holding DE low against threestate leakages that can drive DE high. M1 remains on until an external source overcomes the required input current. At this time, the SR latch resets and M1 turns DIFFERENTIAL POWER-UP GLITCH (1V/µs) 2V/div VCC off. When M1 turns off, DE reverts to a standard, high-impedance CMOS input. Whenever VCC drops below 1V, the hot-swap input is reset. Hot-Swap Line Transient During a hot-swap event when the driver is connected to the line and is powered up, the driver must not cause the differential signal to drop below 200mV. Figures 7, 8, and 9 show the results of the MAX3295 during power-up for three different VCC ramp rates (0.1V/µs, 1V/µs, and 10V/ µs). The photos show the VCC ramp, the single-ended signal on each side of the 100Ω termination, as well as the differential signal across the termination. ESD Protection Human Body Model Figure 10 shows the Human Body Model, and Figure 11 shows the current waveform it generates when discharged into low impedance. This model consists of a 100pF capacitor charged to the ESD voltage of interest, which is then discharged into the device through a 1.5kΩ resistor. 0V 100mV/div AC-COUPLED Y RC 1MΩ 100mV/div AC-COUPLED Z RD 1.5kΩ CHARGE-CURRENT- DISCHARGE RESISTANCE LIMIT RESISTOR 200mV/div Y-Z 1µs/div HIGHVOLTAGE DC SOURCE Cs 100pF DEVICE UNDER TEST STORAGE CAPACITOR Figure 8. Differential Power-Up Glitch (1V/µs) Figure 10. Human Body ESD Test DIFFERENTIAL POWER-UP GLITCH (10V/µs) 2V/div VCC 0V Y 50mV/div AC-COUPLED Z 50mV/div AC-COUPLED Y-Z 100mV/div 200ns/div Ir IP 100% 90% PEAK-TO-PEAK RINGING (NOT DRAWN TO SCALE) AMPERES 36.8% 10% 0V 0V TIME tRL tDL CURRENT WAVEFORM Figure 11. Current Waveform Figure 9. Differential Power-Up Glitch (10V/µs) www.maximintegrated.com Maxim Integrated │ 9 MAX3293–MAX3295 20Mbps, +3.3V, SOT23 RS-485/ RS-422 Transmitters Reduced EMI and Reflections (MAX3293/MAX3294) Driver-Output Protection The MAX3293/MAX3294 are slew-rate limited, minimizing EMI and reducing reflections caused by improperly terminated cables. Figure 12 shows Fourier analysis of the MAX3295 transmitting a 125kHz signal. High-frequency harmonics with large amplitudes are evident. Figure 13 shows the same information, but for the slew-rate-limited MAX3293, transmitting the same signal. The high-frequency harmonics have much lower amplitudes, and the potential for EMI is significantly reduced. To minimize reflections, the line should be terminated at both ends in its characteristic impedance, and stub lengths off the main line should be kept as short as possible. The slew-rate-limited MAX3293 and MAX3294 are more tolerant of imperfect termination. Two mechanisms prevent excessive output current and power dissipation caused by faults or by bus contention. The first, a foldback current limit on the output stage, provides immediate protection against short circuits over the whole common-mode voltage range (see the Typical Operating Characteristics). The second, a thermal-shutdown circuit, forces the driver outputs into a high-impedance state if the die temperature exceeds +160°C. Chip Information PROCESS: BiCMOS DRIVER-OUTPUT WAVEFORM AND FFT PLOT OF MAX3295 DRIVER-OUTPUT WAVEFORM AND FFT PLOT OF MAX3293 10dB/div 10dB/div Figure 12. Driver-Output Waveform and FFT Plot of MAX3295 Transmitting a 125kHz Signal Figure 13. Driver-Output Waveform and FFT Plot of MAX3293 Transmitting a 125kHz Signal Pin Configuration Package Information TOP VIEW DI 1 VCC 2 + MAX3293 MAX3294 MAX3295 DE 3 SOT23-6 www.maximintegrated.com 6 Y 5 GND 4 Z For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO. 6 SOT23 U6CN+2 21-0058 90-0175 Maxim Integrated │ 10 MAX3293–MAX3295 20Mbps, +3.3V, SOT23 RS-485/ RS-422 Transmitters Revision History REVISION NUMBER REVISION DATE PAGES CHANGED 3 3/11 Added lead-free parts to the Ordering Information and Selector Guide tables 1 4 12/14 Added MAX3295AUT/V+T to Ordering Information 1 DESCRIPTION For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com. Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. © 2014 Maxim Integrated Products, Inc. │ 11