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SP3491EP Datasheet(PDF) 1 Page - Sipex Corporation |
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SP3491EP Datasheet(HTML) 1 Page - Sipex Corporation |
1 / 11 page 1 Rev. 10/11/02 SP3490/3491 Low Power Full-Duplex RS485 Transceivers © Copyright 2002 Sipex Corporation ■ 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) SP3490/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. 6 1 2 3 4 5 7 8 Vcc GND R D A B Z Y R D 9 10 11 12 13 14 NC REB DE GND NC NC 1 2 3 4 5 6 7 8 R D Vcc GND R D A B Z Y SP3490 SP3491 +3.3V Low Power Full Duplex RS-485 Transceivers with 10Mbps Data Rate ® |
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