SP490E/491E Enhanced Full Duplex RS-485 Transceivers FEATURES • +5V Only • Low Power BiCMOS • Driver/Receiver Enable (SP491E) • RS-485 and RS-422 Drivers/Receivers • Pin Compatible with LTC490 and SN75179 (SP490E) • Pin Compatible with LTC491 and SN75180 (SP491E) • Improved ESD Specifications: ±15kV Human Body Model ±15kV IEC61000-4-2 Air Discharge Now Available in Lead Free Packaging DESCRIPTION The SP490E is a low power differential line driver/receiver meeting RS-485 and RS-422 standards up to 10Mbps.
The SP491E is identical to the SP490E with the addition of driver and receiver tri-state enable lines.
Both products feature ±200mV receiver input sensitivity, over wide common mod...

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