LTC2861IGN#PBF

Drivers, Receivers, Transceivers Overview

The LTC2861IGN#PBF is a full-duplex RS485/RS422 transceiver operating on a 5V supply with a maximum data rate of 20Mbps. It features an integrated, logic-selectable 120Ω termination resistor and supports up to 256 nodes per bus due to its one-eighth unit load receiver input impedance. The device includes a failsafe feature guaranteeing a high output state for floating or shorted inputs. Driver outputs are current-limited with thermal shutdown protection, while enhanced ESD protection withstands ±15kV (HBM). A logic-selectable low-EMI mode limits the data rate to 250kbps. It operates within a temperature range of –40°C to 85°C and is housed in a 16-lead SSOP package.

Drivers, Receivers, Transceivers Feature Summary

• Integrated switchable 120Ω termination resistor controlled by the TE pin
• Logic-selectable low-EMI mode reducing high-frequency harmonics at 250kbps
• Guaranteed failsafe operation ensuring a high receiver output during input faults
• High input impedance supporting up to 256 nodes on the bus

Drivers, Receivers, Transceivers Applications

• Level translator applications
• Backplane transceivers
• Low-EMI industrial communication networks

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix IGN#PBF corresponds to the 16-lead SSOP package and the I-grade temperature range of –40°C to 85°C. Confirm that the component matches the Analog Devices manufacturer identification and ensure the lead-free finish aligns with project requirements. Cross-reference the part marking '2861I' against the datasheet order information table to validate authenticity.

Drivers, Receivers, Transceivers Selection Notes

Select this component when a full-duplex interface is required alongside integrated line termination to simplify PCB layout. The 16-lead SSOP package offers a larger footprint compared to DFN options, which may facilitate manual assembly or rework. Ensure the application benefits from the 256-node capacity and the specific low-EMI slew rate limiting capabilities provided by the SLO pin control.

Drivers, Receivers, Transceivers Part Context

This component belongs to the LTC2859/LTC2861 family of low-power RS485/RS422 transceivers. While the LTC2859 provides half-duplex functionality, the LTC2861 variant delivers full-duplex communication through separate driver and receiver channels. Both share identical power management features, ESD ratings, and the integrated switchable termination architecture.

Drivers, Receivers, Transceivers Replacement Considerations

Public confirmed substitute part numbers include LTC2861CGN#PBF for commercial grade operation and LTC2861IDE#PBF for the 12-lead DFN package variant.