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MAX3033EEUE Datasheet(PDF) 8 Page - Maxim Integrated Products |
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MAX3033EEUE Datasheet(HTML) 8 Page - Maxim Integrated Products |
8 / 14 page Detailed Description The MAX3030E–MAX3033E are high-speed quad RS- 422 transmitters designed for digital data transmission over balanced lines. They are designed to meet the requirements of TIA/EIA-422-B and ITU-T V.11. The MAX3030E–MAX3033E are available in two pinouts to be compatible with both the 26LS31 and SN75174 industry-standard devices. Both are offered in 20Mbps and 2Mbps baud rate. All versions feature a low-static current consumption (ICC < 100µA) that makes them ideal for battery-powered and power-conscious appli- cations. The 20Mbps version has a maximum propaga- tion delay of 16ns and a part-to-part skew less than 5ns, allowing these devices to drive parallel data. The 2Mbps version is slew-rate-limited to reduce EMI and reduce reflections caused by improperly terminated cables. Outputs have enhanced ESD protection providing ±15kV tolerance. All parts feature hot-swap capability that eliminates false transitions on the data cable dur- ing power-up or hot insertion. ±15kV ESD Protection As with all Maxim devices, ESD-protection structures are incorporated on all pins to protect against electro- static discharges encountered during handling and assembly. The driver outputs and receiver inputs have extra protection against static electricity. Maxim’s engi- neers developed state-of-the-art structures to protect these pins against ESD of ±15kV without damage. The ESD structures withstand high ESD in all states: normal operation and power-down. After an ESD event, the MAX3030E–MAX3033E keep working without latchup. ESD protection can be tested in various ways; the transmitter outputs of this product family are character- ized for protection to ±15kV using the Human Body Model. Other ESD test methodologies include IEC10004-2 Contact Discharge and IEC1000-4-2 Air- Gap Discharge (formerly IEC801-2). ESD Test Conditions ESD performance depends on a variety of conditions. Contact Maxim for a reliability report that documents test setup, test methodology, and test results. Human Body Model Figure 8 shows the Human Body Model, and Figure 9 shows the current waveform it generates when dis- charged into low impedance. This model consists of a 100pF capacitor charged to the ESD voltage of interest, which is then discharged into the test device through a 1.5k Ω resistor. ±15kV ESD-Protected, 3.3V Quad RS-422 Transmitters 8 _______________________________________________________________________________________ DI VCC GND A A DO_- DO_+ Figure 7. Power-Off Measurements Test Circuits and Timing Diagrams (continued) CHARGE-CURRENT- LIMIT RESISTOR DISCHARGE RESISTANCE STORAGE CAPACITOR Cs 100pF RC 1M Ω RD 1.5k Ω HIGH- VOLTAGE DC SOURCE DEVICE UNDER TEST Figure 8. Human Body ESD Test Model IP 100% 90% 36.8% tRL TIME tDL CURRENT WAVEFORM PEAK-TO-PEAK RINGING (NOT DRAWN TO SCALE) Ir 10% 0 0 AMPS Figure 9. Human Body Current Waveform |
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