SP1491E

® SP1490E/SP1491E Full Duplex RS-485 Transceivers FEATURES ■ +5V Only ■ Low Power BiCMOS ■ Driver/Receiver Enable (SP1491E) ■ RS-485 and RS-422 Drivers/Receivers ■ Pin Compatible with SN75179 (SP1490E) ■ Pin Compatible with SN75180 (SP1491E) ■ Improved ESD Specifications ±15kV Human Body Model ±15kV IEC1000-4-2 Air Discharge ±8kV IEC1000-4-2 Contact Discharge VCC 1 RO 2 DI 3 GND 4 8A SP1490E 7B 8 Pin - nSOIC 6Z 5Y APPLICATIONS ■ Industial Networks ■ Telecom ■ Motor Control ■ HVAC/ Building Control DESCRIPTION The SP1490E is a low power differential line driver/receiver meeting RS-485 and RS-422 standards up to 20Mbps. The SP1491E is identical to the SP1490E with the addition of driver and receiver tri-state enable lines. Both products feature ±200mV receiver input sensitivity, over wide common mode range. The SP1490E is available in 8-pin plastic DIP and 8-pin NSOIC packages for operation over the commercial and industrial temperature ranges. The SP1491E is available in 14-pin DIP and 14-pin NSOIC packages for operation over the commercial and industrial temperature ranges. BLOCK DIAGRAM Vcc 1 RO 2 R DI 3 D GND 4 NC 1 8A 7B RO 2 R REB 3 6Z DE 4 5Y DI 5 D GND 6 GND 7 14 Vcc 13 NC 12 A 11 B 10 Z 9Y 8 NC SP1490E SP1491E Date: 5/11/05 SP1490E/1491E Full Duplex RS-485 Transceivers 1 © Copyright 2004 Sipex Corporation ABSOLUTE MAXIMUM RATINGS These are stress ratings only and functional operation of the device at these ratings or any other above...