SP3494

® SP3493/SP3494 +3.3V Low Power RS-485/RS-422 Transceivers ■ Operates From A Single +3.3V Supply ■ Interoperable With +5V Logic ■ +200mV Receiver Input Sensitivity ■ -7V to +12V Common-Mode Input Voltage Range ■ Devices Allow Up To 32 Transceivers On The Serial Bus ■ Driver/Receiver Enable Lines (SP3494) ■ 2nA Low-Power Shutdown Mode (SP3494) ■ Compatible With The MAX3488, LTC490 and 75179 Industry Standard Pinouts (SP3493) ■ Compatible With The MAX3486 and 75176 Industry Standard Pinouts (SP3494) DESCRIPTION The SP3493 and the 3494 devices are +3.3V, low power transceivers that meet the specifications of the RS-485 and RS-422 serial protocols. The SP3493 and the 3494 devices are pin-to-pin compatible with the Sipex SP3490 and the SP3481 devices, respectively, as well as other popular industry standards. The devices feature Sipex's BiCMOS process, allowing low power operation without sacrificing performance. The partially slew-rate limited drivers minimize EMI and reduce reflections caused by improperly terminated cables allowing error-free data transmission. The SP3493 is a full-duplex low power transceiver that will deliver a data transmission rate up to 250kbps. The SP3494 is a half-duplex partially slew-rate limited transceiver that will deliver a data transmission rate up to 2.5Mbps. The SP3494 is equipped with a low-power shutdown mode and driver/receiver high-Z enable lines. Vcc 1 R 2 8 A R RO 1 R 8 VCC 7 B RE 2 7 B 6 Z D 3 GND 4 D DE 3 6 A 5 Y DI 4 D 5...