SP489A

PRELIMINARY INFORMATION ® SP488A and SP489A High Speed Quad RS-485/RS-422 Line Receivers s High Speed Versions of Sipex's SP488 & SP489 s 30Mbps Transmission Rates s Quad Differential Line Receivers s RS-485 or RS-422 Applications s Tri–state Output Control s 30ns Typical Receiver Propagation Delays s –7V to +12V Common Mode Input Range s 1mA Supply Current s Single +5V Supply Operation s Pin Compatible with SN75173, SN75175, LTC488 and LTC489 DESCRIPTION… The SP488A and SP489A are high speed quad differential line receivers capable of meeting the RS-485 and RS-422 protocols while running at five times the normal transmission rates. The SP488A and SP489A are enhanced versions of Sipex's SP488 and SP489 quad RS-485/RS-422 line receivers. The SP488A features a common receiver enable control; the SP489A provides independent receiver enable controls for each pair of receivers. Both feature tri–state outputs and wide common–mode input range. The receivers have a fail–safe feature which forces a logic “1” output when receiver inputs are left floating. Both are available in 16–pin plastic DIP and SOIC packages. RI1B RI1A RO1 EN RO2 RI2A RI2B GND 1 2 3 4 5 6 7 8 SP488A 1 4 16 15 14 13 12 VCC RI4B RI4A RO4 EN RO3 RI3A RI3B RI1B RI1A RO1 EN1/EN2 RO2 RI2A RI2B GND 1 2 3 4 5 6 7 8 SP489A 1 4 16 15 14 13 12 VCC RI4B RI4A RO4 EN3/EN4 RO3 RI3A RI3B 2 3 11 10 9 2 3 11 10 9 SP488A/489ADS/07 SP488A/489A High Speed Quad RS-485/RS-422 Line Receivers © Copyright 2000 Sipex Corp...