SP3082EMN-L/TR

Drivers, Receivers, Transceivers Overview

The MaxLinear SP3082EMN-L/TR is a half-duplex RS-485/RS-422 transceiver operating from a single 5.0V supply (4.5V to 5.5V). It supports data rates up to 115 kbps with controlled slew rates for low EMI. The device features advanced failsafe circuitry, ensuring a logic-high receiver output when inputs are open or shorted. It includes hot-swap glitch protection on control inputs and robust ESD protection rated at ±15kV (Air-Gap/Human Body Model) and ±8kV (Contact Discharge). Quiescent current is 400μA in active mode, dropping to 1μA in shutdown mode.

Drivers, Receivers, Transceivers Feature Summary

• Advanced failsafe guarantees a logic-high receiver output if differential inputs are left un-driven, shorted, or terminated without active drivers.
• Hot-swap capability prevents invalid data transfer during live insertion by holding enable inputs in a safe state during power-up.
• Robust electrostatic discharge protection on all pins withstands severe static events without latch-up or damage.
• Ultra-low quiescent current consumption minimizes power usage, with an additional shutdown mode reducing current to approximately 1μA.

Drivers, Receivers, Transceivers Applications

• Motor Control systems
• Building Automation networks
• Security Systems
• Remote Meter Reading infrastructure

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and reel specifications. Confirm RoHS compliance status directly with the manufacturer or authorized distributor records. Ensure the component source matches the designated manufacturer to avoid counterfeit parts. Cross-reference the full part number with the latest datasheet revision to validate electrical characteristics and pinout assignments.

Drivers, Receivers, Transceivers Selection Notes

Select this component for applications requiring reliable bidirectional communication on multipoint bus transmission lines. The 1/8th unit load specification allows up to 256 transceivers on a single bus while preserving signal margin. Choose this model over full-duplex variants when half-duplex operation suffices for the system architecture. Verify that the 115 kbps signaling rate meets the latency requirements of the target application.

Drivers, Receivers, Transceivers Part Context

This device belongs to the SP3080E-SP3088E family of advanced-failsafe RS-485/RS-422 transceivers originally developed by Exar Corporation. The family shares common architectural features including industrial temperature ratings and standard package footprints. This specific variant represents the half-duplex, 115 kbps speed grade within the 8-pin NSOIC footprint configuration.

Drivers, Receivers, Transceivers Replacement Considerations

Pin-compatible upgrades include the SN75176 and MAX3082. Other family members like the SP3085E offer higher data rates but maintain similar interface characteristics.

Drivers, Receivers, Transceivers FAQ

How does the failsafe feature behave when the bus is idle?

The receiver outputs a logic-high state if the differential inputs are open-circuited, shorted together, or shunted by a termination resistor while no driver is active.

What is the purpose of the hot-swap protection?

It holds the Driver Enable (DE) low and Receiver Enable (RE) high during power-up to prevent the transceiver from driving invalid data onto an energized bus during board insertion.

What is the maximum number of transceivers supported on the bus?

Due to the 1/8th unit load receiver input impedance, up to 256 transceivers can coexist on the shared bus line.