LTM2881MPY-5#PBF

Overview

The LTM2881MPY-5#PBF is a complete galvanically isolated full-duplex RS485/RS422 μModule transceiver manufactured by Analog Devices Inc. It integrates an isolated DC/DC converter, requiring no external components. The device supports data rates up to 20 Mbps or low EMI modes at 250 kbps. It operates on a single supply voltage ranging from 4.5 V to 5.5 V and provides a regulated 5 V output capable of sourcing up to 200 mA for interface power. The module features high common-mode transient immunity exceeding 30 kV/μs and offers isolation voltages greater than 560 V peak.

Feature Summary

• Integrates a complete isolated RS485/RS422 transceiver with an internal DC/DC converter
• Provides high common-mode transient immunity exceeding 30 kV/μs
• Supports selectable data rates including 20 Mbps and low EMI 250 kbps modes
• Delivers integrated 5 V output power for connected interface devices

Applications

• Industrial automation systems requiring galvanic isolation
• Factory floor communication networks using RS485/RS422 protocols
• Medical equipment needing safe signal transmission across isolation barriers
• Test and measurement instruments with noisy electrical environments

Procurement Notes

Verify the specific suffix MPY against official Analog Devices documentation to confirm package type and temperature range. Ensure the #PBF designation aligns with lead-free compliance requirements for your assembly process. Cross-reference the datasheet revision date to confirm current manufacturing status and any potential obsolescence notices before finalizing procurement plans.

Selection Notes

Select this component when a compact, fully integrated solution for isolated serial communication is required without external magnetic components. It is suitable for designs demanding high noise immunity and simplified bill of materials. Consider the thermal performance within the LGA package if operating near maximum temperature limits. Verify that the 200 mA output current capability meets the power needs of the downstream bus transceivers.

Part Context

This part belongs to the LTM2881 family of μModules, which are designed to simplify the implementation of isolated serial interfaces. These modules replace traditional discrete solutions involving separate isolators and transformers. The LTM2881 series specifically targets RS485 and RS422 applications, offering a standardized footprint and integrated power management to reduce design complexity in industrial and medical sectors.

Replacement Considerations

Official substitutes include other variants within the LTM2881 family such as LTM2881CV-5#PBF or LTM2881IY-5#PBF, depending on the required package style and operating temperature range. Verify pin compatibility and electrical specifications before substitution.