SP3486

® SP3486 and SP3487 +3.3V Low Power Quad RS-485/RS-422 Line Drivers ■ RS-485 or RS-422 Quad Differential Line Drivers ■ Operates from a single +3.3V supply ■ Interoperable with +5.0V logic ■ Tri-state Output Control ■ -7V to +12V Common-Mode Input Voltage Range ■ Common Driver Enable Control (SP3486) ■ Independent Driver Enable Controls for each pair of Drivers (SP3487) ■ Compatibility with LTC486 and SN75172 (SP3486) ■ Compatibility with LTC487 and SN75174 (SP3487) DESCRIPTION The SP3486 and the SP3487 are +3.3V low power quad drivers that meet the specifications of the RS-485 and RS-422 serial protocols. These devices are pin-to-pin compatible with Sipex's SP486 and SP487 devices as well as popular industry standards. The SP3486 and SP3487 feature Sipex's BiCMOS process allowing low power operation without sacrificing performance. The SP3486 and SP3487 meet the electrical specifications of RS-485 and RS-422 serial protocols up to 10Mbps under load. The SP3486 features a common driver enable control. The SP3487 provides independent driver enable controls for each pair of drivers. Both devices feature tri-state outputs and a -7V to +12V common-mode input voltage range. DI1 DO1A DO1B EN DO2B DO2A DI2 GND 1 SP3486 1 16 15 VCC DI4 DO4A DO4B EN DO3B DO3A DI3 DI1 DO1A DO1B EN1/EN2 DO2B DO2A DI2 GND 1 SP3487 1 16 15 VCC DI4 DO4A DO4B EN3/EN4 DO3B DO3A DI3 2 2 4 3 4 5 6 14 13 12 11 3 4 5 6 4 14 13 12 11 2 7 10 2 7 10 3 8 9 3 8 9 10/15/02 SP3486/3487 Low Power Q...