LTC2855

PRODUCTION

3.3V 20Mbps RS485/RS422 Transceiver with Integrated Switchable Termination

Part Models: 12
1ku List Price: Starting From $2.08

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Part Details

Integrated, Logic-Selectable 120Ω Termination Resistor
3.3V Supply Voltage
20Mbps Maximum Data Rate
No Damage or Latchup Up to ±25kV HBM
High Input Impedance Supports 256 Nodes (C-, I‑Grade)
Operation Up to 125°C (H-Grade)
Guaranteed Fail-safe Receiver Operation Over the Entire Common Mode Range
Current Limited Drivers and Thermal Shutdown
Delayed Micropower Shutdown: 5μA Maximum (C-, I-Grade)
Power Up/Down Glitch-Free Driver Outputs
Low Operating Current: 370μA Typical in Receive Mode
Compatible with TIA/EIA-485-A Specifications
Available in 10-Pin 3mm × 3mm DFN, 12-Pin 4mm × 3mm DFN and 16-Pin SSOP Packages

The LTC2854 and LTC2855 are low power, 20Mbps RS485/RS422 transceivers operating on 3.3V supplies. The receiver includes a logic-selectable 120Ω termination, one-eighth unit load supporting up to 256 nodes per bus (C-, I-Grade), and a fail-safe feature that guarantees a high output state under conditions of floating or shorted inputs.

The driver maintains a high output impedance over the entire common mode range when disabled or when the supply is removed. Excessive power dissipation caused by bus contention or a fault is prevented by current limiting all outputs and by a thermal shutdown.

Enhanced ESD protection allows the LTC2854 to withstand ±25kV (human body model) and the LTC2855 to withstand ±15kV on the transceiver interface pins without latchup or damage.


Part Number	Duplex	Package
LTC2854	Half	DFN-10
LTC2855	Full	SSOP-16, DFN-12

Applications

Low Power RS485/RS422 Transceiver
Level Translator
Backplane Transceiver

Part Models: 12
1ku List Price: Starting From $2.08

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTC2855CDE#PBF	12-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2855CDE#TRPBF	12-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2855CGN#PBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2855CGN#TRPBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2855HDE#PBF	12-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2855HDE#TRPBF	12-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2855HGN#PBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2855HGN#TRPBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2855IDE#PBF	12-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2855IDE#TRPBF	12-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2855IGN#PBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2855IGN#TRPBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Oct 3, 2024 - 24_0235 (QSOP/SSOP PKG) Migrating Bottom Trace Code Marking to Top Side Laser Marking
		PCN24_0235_Form Material_Report Other Delta Qualification Matrix
LTC2855CGN#PBF	PRODUCTION
LTC2855CGN#TRPBF	PRODUCTION
LTC2855HGN#PBF	PRODUCTION
LTC2855HGN#TRPBF	PRODUCTION
LTC2855IGN#PBF	PRODUCTION
LTC2855IGN#TRPBF	PRODUCTION
Oct 11, 2022 - 22_0235 Epoxy Change from Henkel 8290 to 8290A for GN Package
		PCN22_0235_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LTC2855CGN#PBF	PRODUCTION
LTC2855CGN#TRPBF	PRODUCTION
LTC2855HGN#PBF	PRODUCTION
LTC2855HGN#TRPBF	PRODUCTION
LTC2855IGN#PBF	PRODUCTION
LTC2855IGN#TRPBF	PRODUCTION
Apr 6, 2022 - 22_0066 Laser Top Mark for 16QSOP Assembled in ADPG [PNG]
		PCN22_0066_Form Material_Report Delta Qualification Matrix
LTC2855CGN#PBF	PRODUCTION
LTC2855CGN#TRPBF	PRODUCTION
LTC2855HGN#PBF	PRODUCTION
LTC2855HGN#TRPBF	PRODUCTION
LTC2855IGN#PBF	PRODUCTION
LTC2855IGN#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Isolated RS-485 1
LTM2881	PRODUCTION	Complete Isolated RS485/RS422 μModule Transceiver + Power

Tools & Simulations

IBIS Model 1

LTC2855 IBIS Model

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Documentation

Data Sheet 1

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Product Selector Card 2