The MAX13410E–MAX13415E are half-duplex RS-485-/RS-422-compatible transceivers optimized for isolated applications.These devices feature an internal low-dropoutregulator (LDO), one driver, and one receiver.

The internalLDO allows the part to operate from an unregulatedpower supply of up to 28V. The AutoDirection featurereduces the number of optical isolators needed in isolatedapplications.

Other features include enhanced ESDprotection, fail-safe circuitry, slew-rate limiting, and fullspeedoperation.The MAX13410E–MAX13415E internal LDO generates a5V ±10% power supply that is used to power its internalcircuitry.

The MAX13412E–MAX13415E bring the 5V to anoutput VREG that allows the user to power additionalexternal circuitry with up to 20mA to further reduce externalcomponents. The MAX13410E/MAX13411E do nothave a 5V output and come in industry-compatiblepinouts.

This allows easy replacement in existing designs.The MAX13410E–MAX13415E feature a 1/8-unit loadreceiver input impedance, allowing up to 256 transceiverson the bus. All driver outputs are ESD protectedusing the Human Body Model.

These devices alsoinclude fail-safe circuitry (MAX13410E/MAX13411E/MAX13414E/MAX13415E only), guaranteeing a logichighreceiver output when the receiver inputs are openor shorted.

The receiver outputs a logic-high when thetransmitter on the terminated bus is disabled (highimpedance).The MAX13412E/MAX13413E feature Maxim’s proprietaryAutoDirection control.

This architecture eliminatesthe need for the DE and RE control signals. In isolatedapplications, this reduces the cost and size of the systemby reducing the number of optical isolators required.

The MAX13410E/MAX13412E/MAX13414E featurereduced slew-rate drivers that minimize EMI and reducereflections caused by improperly terminated cables,allowing error-free transmission up to 500kbps.

TheMAX13411E/MAX13413E/MAX13415E are not slew-ratelimited, allowing transmit speeds up to 16Mbps.The MAX13410E–MAX13415E are available in an 8-pinSO package with an exposed paddle to improve powerdissipation, and operate over the extended -40°C to+85°C temperature range.

Features

♦ Wide +6V to +28V Input Supply Range

♦ +5V Output Supplies Up to 20mA to ExternalCircuitry

♦ Internal LDO

♦ Low 65µA (typ) Shutdown Supply Current

♦ Extended ESD Protection±15kV Human Body Model (MAX13412E/MAX13413E)±14kV Human Body Model (MAX13410E/MAX13411E)

♦ 1/8-Unit Load, Allowing Up to 256 Transceivers onthe Bus

♦ -40°C to +85°C Operating Temperature Range

♦ Fail-Safe♦ Slew-Rate Limited and Full-Speed Versions

♦ Up to 16Mbps Data Rate on Full-Speed Versions

Applications

Isolated RS-485

Interfaces

Utility MetersIndustrial Equipment

Telecomm Equipment

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