MAX3089CSD+T

Overview

The MAX3089CSD+T is a high-speed RS-485/RS-422 transceiver in a 14-pin SOIC package. It features one driver and one receiver with fail-safe circuitry guaranteeing a logic-high output when inputs are open or shorted. The device operates on a single +5V supply (4.75V to 5.25V) and draws 375µA quiescent current. Data rates are selectable via the SRL pin: 115kbps (unconnected), 500kbps (SRL=VCC), or 10Mbps (SRL=GND). Duplex mode is configurable between half-duplex (H/F=VCC) and full-duplex (H/F=GND). Receiver and transmitter phases can be inverted independently using RXP and TXP pins.

Feature Summary

• Configurable data rate selection for 115kbps, 500kbps, and 10Mbps operation
• Selectable half-duplex or full-duplex communication modes
• Independent programmable receiver and transmitter phase inversion
• Fail-safe circuitry ensuring logic-high output during idle or fault conditions

Applications

• RS-422/RS-485 communications
• Level translators
• Transceivers for EMI-sensitive applications
• Industrial-control local area networks

Procurement Notes

Verify the specific suffix 'C' indicates commercial temperature range (0°C to +70°C) and '+T' denotes tape-and-reel packaging. Confirm the component is sourced from Analog Devices or Maxim Integrated. Ensure the datasheet revision matches the design requirements for electrical characteristics.

Selection Notes

Select this part when flexible configuration of duplex mode and data rate is required within a single component. It serves as a drop-in replacement for standard 75180 pinouts while adding programmability. Verify that the system power supply remains stable at +5V and that the bus topology supports up to 256 unit loads.

Part Context

The MAX3089 belongs to the MAX3080–MAX3089 family of high-speed transceivers. Unlike fixed-function variants, it offers selectable slew rates and duplex modes. It shares the industry-standard 14-pin pinout with devices like the MAX3080 and MAX3086, facilitating board layout reuse across different speed and protocol requirements.

Replacement Considerations

The MAX3089 is pin-compatible with the 75180. Direct functional substitutes include other MAX308x series devices such as the MAX3080 or MAX3086, though these lack the MAX3089's programmable slew-rate and duplex selectors.