SP495

® SP495 Quad Differential RS-485 Transceiver s Pinout for SCSI Interface s Meets EIA-485 Standard for Multipoint Bus Transmission s +5V-Only Power Supply Required s Receiver Fail-Safe Mode s Low Power BiCMOS Technology s Glitch-Free Power-Up/Down s Available in 20-Pin Plastic SOIC s Pin Compatible with DS36954 DESCRIPTION… The SP495 is a quad differential line driver/receiver meeting both RS-485 and RS-422 standards at data rates beyond 10Mbps. The SP495 features three half-duplex transceivers suitable for data bus connections and a fourth full-duplex transceiver with independent driver, receiver enables. Ideal for use as a control bus transceiver. A complete SCSI initiator or target interface can be implemented using five SP495s. Propagation Delay Skew is tightly specified to aid in parallel interface designs. The SP495 is available in a 20-pin plastic SOIC package for operation over the commercial and industrial temperature ranges. For PLCC availability, please consult factory. OA1 OB1 20 19 OA2 OB2 18 17 SP495V 16 cc OA3 OB3 15 14 13 OA4 OB4 12 R1 D1 D2 R2 D3 R3 D4 R4 2 1 3 4 11 GND 6 5 8 9 7 10 DR1 DE1/RE1 DR2 DE2/ RE2 DR3 DE3/ RE3 DI4 DE4 RO4 RE4 SP495 Quad Differential RS-485 Transceiver © Copyright 2000 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. E...