LTC2855IGN#PBF

Drivers, Receivers, Transceivers Overview

The LTC2855IGN#PBF is a low-power, full-duplex RS485/RS422 transceiver operating on a 3.3V 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 input impedance. The device provides ±15kV HBM ESD protection on interface pins, guaranteed failsafe receiver operation, and thermal shutdown. It operates within a temperature range of –40°C to +85°C and is housed in a 16-lead narrow SSOP package.

Drivers, Receivers, Transceivers Feature Summary

• Integrated switchable 120Ω termination resistor for optimized signal fidelity
• Full-duplex architecture with independent driver and receiver channels
• Enhanced noise immunity with guaranteed failsafe receiver operation
• Robust protection against short circuits and excessive power dissipation

Drivers, Receivers, Transceivers Applications

• Industrial control and instrumentation networks
• Building automation and security systems
• HVAC control applications

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix IGN#PBF corresponds to the I-grade temperature rating and lead-free packaging configuration. Confirm that the 16-lead SSOP package dimensions align with the target PCB footprint requirements. Ensure the design accounts for the 3.3V supply voltage constraints and proper decoupling capacitor placement near the VCC pin as specified in the datasheet.

Drivers, Receivers, Transceivers Selection Notes

Select this component when a full-duplex RS485/RS422 solution is required alongside integrated line termination capabilities. The one-eighth unit load specification allows for higher node density compared to standard receivers. Consider the 20Mbps data rate capability and the specific ESD protection levels suitable for the intended industrial or building environment.

Drivers, Receivers, Transceivers Part Context

This part belongs to the LTC2854/LTC2855 family of 3.3V transceivers. While the LTC2854 offers half-duplex communication, the LTC2855 provides full-duplex functionality with separate transmit and receive lines. Both share similar protection features and termination options but differ in channel configuration and package availability.

Drivers, Receivers, Transceivers Replacement Considerations

The datasheet indicates pin compatibility with the LTC2862 and LT1785. Verify functional equivalence regarding data rates and protection levels before substitution. Ensure that any replacement component supports the same 3.3V supply voltage and package type if board space is constrained.