描述 Description

The SP3070E-3078E differential line transceivers are suitable forbidirectional communication on balanced multipoint bus transmissionlines and comply with both RS485 and RS422 EIA Standards. Each deviceconsists of a differential driver and differential receiver. All devicesoperate from a 3.3V power supply.High receiver input impedance allows a large number of transceivers toshare a common data bus while maintaining signal margin and withoutexcessive loading or use of expensive repeaters. The high impedancedriver output is maintained over the entire common-mode voltage rangefrom -7 to +12V. Receivers will failsafe to logic 1 output when inputsare open, shorted or terminated. Drivers include built-in short-circuitprotection and a thermal-overload shutdown to protect against excessivepower dissipation from bus contention or cable faults. All RS485receiver inputs and driver outputs are ESD protected up to ±15kV(Air-Gap and Human Body Model) and up to ±8kV Contact discharge (IEC1000-4-2).For technical support or help choosing a product please email Exar’s Serial Technical Support group at:?serialtechsupport@exar.com.

特性 Features

·±15kV ESD protection for RS485 pins
·3.3V low-power operation
·Advanced receiver-failsafe protection for open, shorted or terminated lines
·Up to 256 Transceivers may share bus
·Very low load for 8x greater fan-out
·Hot Swap glitch protection RE and DE
·Thermal shutdown protects against driver contention
·Available in three industry standard footprints·SP3070E, SP3073E and SP3076E in Full-Duplex (14 pin)
·SP3071E, SP3074E and SP3077E in Full-Duplex (8 pin)
·SP3072E, SP3075E and SP3078E in Half-Duplex (8 pin)

·Three applications-optimized speed grades·SP3070-72E: 250kbps fully slew-limited
·SP3073-75E: 500kbps slew-limited
·SP3076-78E: 16Mbps high speed

·Small form factor SO-narrow packages
·Industrial (-40 to +85oC) & Extended (-40 to +85oC) temperature grades

應(yīng)用 Application

Design ToolsTechnical Library·Application Notes