SP3495EEN-L/TR MaxLinear

3.3V RS-485/RS-422 Transceivers SP3495E / SP3496E / SP3497E High Speed, 3.3V RS-485/RS-422 Transceivers 15kV ESD protection and Advanced Fail-safe P3495E SP3497E transceivers are suitable for high speed S communication on multipoint or multidrop bus transmission lines. They are designed for balanced data transmission and comply with both RS-485 and RS-422 EIA Standards. Each de vice con- tains one differential driver and one differential receiver. Driver differential outputs and receiver differential inputs are connected internally to form a half-duplex input/output to the RS-485 bus. Separate RE and DE pins enable and disable the driver and receiver independently or may be externally connected together as a direction control. The device enters a low power shutdown mode if both driver and receiver are disabled. The bus-pin out- puts of disabled or powered down devices are in high imped- ance state. The high impedance driver output is maintained over the entire common-mode voltage range from -7 to +12V. Major Features SP3495E SP3497E operates from a single 3.3 V power supply. The transceivers load the data bus only half as much as standard 3.3V Single Supply Operation RS-485 unit load. This allows up to 64 devices to be connected High Speed Up to 32 Mbps simultaneously on a bus without violating required RS-485 signal margin and without using repeaters. Only one driver should be 15kV ESD Protection enabled and active at any time on a shared bus. Excessive pow- Advanced Fail-safe er dissipation caused by bus contention or by shorting outputs to ground or a voltage source is prevented by short circuit protec- Hot Swap Glitch Protection tion and thermal shutdown. This feature forces the driver output Half Unit Load, 64 Transceivers on the Bus into high impedance state if the absolute value of the output cur- o Driver Short Circuit Protection rent exceeds 250mA or if junction temperature exceeds 165 C. Thermal Shutdown Overload Protection Receivers will fail-safe to a logic-one output state if the inputs are Industry Standard Pin Out unconnected (floating), shorted or terminated data lines. All in- puts and outputs have ESD protection. All RS-485 input and out- put bus pins are ESD protected up to 15kV Human Body Model. Applications Ordering Information Tape / Temperature Factory Automation Control Part Pb-free Reel range Package Type Industrial Process Control o SP3495EEN -L /TR -40 to +85 C 8 pin SO-narrow High Speed Motor Control o SP3496EEN -L /TR -40 to +85 C 8 pin SO-narrow Building Automation and Environmental Controls o SP3497EEN -L /TR -40 to +85 C 14 pin SO-narrow Building Security Systems Remote Metering and Monitoring Typical Application Circuit Exar Corporation 48720 Kato Road Fremont, CA 94538 U.S.A. +1.510.668.7000 fax +1.510.668.7001 www.exar.com FLY0509 SP3495E / SP3496E / SP3497E 2009 Exar Corporation