MAX3088CSA+

Overview

The MAX3088CSA+ is a half-duplex RS-485/RS-422 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates from a single +5V supply (4.75V to 5.25V) and supports data rates up to 10Mbps with unrestricted driver slew rates. The device features fail-safe circuitry that guarantees a logic-high receiver output when inputs are open or shorted. It incorporates thermal shutdown protection for the driver outputs and includes low-power shutdown mode capability. The component is housed in an 8-pin SOIC package and is rated for operation within a temperature range of 0°C to +70°C.

Feature Summary

• Fail-safe receiver circuitry ensures a logic-high output state during bus idle, open, or shorted conditions.
• Unrestricted driver slew rate enables high-speed data transmission up to 10Mbps.
• Integrated thermal shutdown protects the driver against excessive power dissipation.
• Low quiescent supply current of 375µA supports power-efficient system designs.

Applications

• RS-422 and RS-485 communication networks
• Industrial control local area networks
• Level translation applications

Procurement Notes

Verify the specific ordering suffix CSA+ to confirm the SOIC-8 package and commercial temperature range. Confirm RoHS compliance status through official manufacturer documentation. Ensure the design accounts for the +5V supply requirement and the half-duplex pin configuration distinct from full-duplex variants.

Selection Notes

Select this component for half-duplex RS-485/RS-422 applications requiring 10Mbps speeds. It is suitable where fail-safe behavior on an idle bus is required. Compare against MAX3086 or MAX3087 if full-duplex operation is needed instead. Verify that the 0°C to +70°C operating range meets the environmental requirements of the target application.

Part Context

The MAX3088 belongs to the MAX3080–MAX3089 family of high-speed transceivers designed for RS-485 and RS-422 standards. This family provides various combinations of duplex modes and slew-rate limitations. The MAX3088 specifically addresses half-duplex needs with high-speed capabilities, distinguishing it from the slower MAX3082 or the full-duplex MAX3086.

Replacement Considerations

The MAX3088ECSA+ is available as an industrial temperature grade (-40°C to +85°C) alternative. Other pin-compatible options include the MAX3082 for lower speeds or the MAX3086/MAX3087 for full-duplex configurations.

FAQ

What is the fail-safe threshold voltage for the receiver?

The receiver guarantees a logic-high output if the differential input voltage (A-B) is greater than or equal to -50mV, and a logic-low if it is less than or equal to -200mV.

How does the device handle driver over-temperature conditions?

Thermal shutdown circuitry monitors the driver die temperature. If excessive power dissipation occurs, the driver outputs enter a high-impedance state to protect the device.

What is the receiver input impedance of the MAX3088?

The device features a 1/8-unit-load receiver input impedance (96kΩ), allowing up to 256 transceivers to be connected on a single bus.