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SP3491 Dataheets PDF



Part Number SP3491
Manufacturers Sipex
Logo Sipex
Description +3.3V Low Power Full Duplex RS-485 Transceivers with 10Mbps Data Rate
Datasheet SP3491 DatasheetSP3491 Datasheet (PDF)

® SP3490/SP3491 +3.3V Low Power Full Duplex RS-485 Transceivers with 10Mbps Data Rate ■ Full Duplex RS-485 and RS-422 Transceivers ■ Operates from a single +3.3V supply ■ Interoperable with +5.0V logic ■ Driver/Receiver Tri-state Enable Lines (SP3491) ■ -7V to +12V Common-Mode Input Voltage Range ■ +200mV Receiver Input Sensitivity ■ Allows up to 32 transceivers on the serial bus ■ Compatibility with LTC490 and SN75179 (SP3490) ■ Compatibility with LTC491 and SN75180 (SP3491) DESCRIPTION The S.

  SP3491   SP3491



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® SP3490/SP3491 +3.3V Low Power Full Duplex RS-485 Transceivers with 10Mbps Data Rate ■ Full Duplex RS-485 and RS-422 Transceivers ■ Operates from a single +3.3V supply ■ Interoperable with +5.0V logic ■ Driver/Receiver Tri-state Enable Lines (SP3491) ■ -7V to +12V Common-Mode Input Voltage Range ■ +200mV Receiver Input Sensitivity ■ Allows up to 32 transceivers on the serial bus ■ Compatibility with LTC490 and SN75179 (SP3490) ■ Compatibility with LTC491 and SN75180 (SP3491) DESCRIPTION The SP3490 and the SP3491 are +3.3V low power full duplex transceivers that meet the specifications of the RS-485 and RS-422 serial protocols. These devices are pin-to-pin compatible with the Sipex SP490 and SP491 devices as well as popular industry standards. The SP3490 and the SP3491 feature Sipex's BiCMOS process, allowing low power operation without sacrificing performance. The SP3490 and SP3491 meet the electrical specifications of RS-485 and RS-422 serial protocols up to 10Mbps under load. The SP3491 is identical to the SP3490 with the addition of driver and receiver tri-state enable lines. NC 1 14 Vcc 13 NC 12 A Vcc 1 R 2 R 2 8 A R 11 B R REB 3 7 B DE 4 6 Z D 3 GND 4 10 Z D 5 D 5 Y D GND 6 GND 7 9 Y 8 NC SP3490 SP3491 Rev. 10/11/02 SP3490/3491 Low Power Full-Duplex RS485 Transceivers © Copyright 2002 Sipex Corporation 1 ABSOLUTE MAXIMUM RATINGS These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. VCC ............................................................................................. +6.0V Input Voltages Drivers ............................................................... -0.3V to +6.0V Receivers ......................................................................... ±14V Output Voltages Drivers .............................................................................. ±14V Receivers .......................................................... -0.3V to +6.0V Storage Temperature ................................................... -65˚C to +150˚ Power Dissipation per Package 8-pin NSOIC (derate 6.90mW/oC above +70oC) ..................... 600mW 8-pin PDIP (derate 11.8mW/oC above +70oC) ...................... 1000mW 14-pin NSOIC (derate 8.33mW/oC above +70oC) ................... 700mW 14-pin PDIP (derate 14.3mW/oC above +70oC) .................... 1200mW SPECIFICATIONS TAMB = TMIN to TMAX and VCC = 3.3V ± 5% unless otherwise noted. PARAMETERS SP3490 DRIVER DC Characteristics Differential Output Voltage Differential Output Voltage Differential Output Voltage Change in Magnitude of Driver Differential Output Voltage for Complimentary States Driver Common-Mode Output Voltage Input High Voltage Input Low Voltage Input Current Driver Short-Circuit Current VOUT = HIGH VOUT = LOW SP3490 DRIVER.


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