LTC2857

PRODUCTION

20Mbps and Slew Rate Limited 15kV RS485/RS422 Transceiver

Part Models: 24
1ku List Price: Starting From $1.89

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Part Details

20Mbps or Low EMI 250kbps Maximum Data Rate
No Damage or Latch-up to ESD: ±15kV 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: 900µA Maximum in Receive Mode
Compatible with TIA/EIA-485-A Specifications
Available in 8-Lead and 10-Lead 3mm × 3mm DFN and 8-Lead and 10-Lead MSOP Packages

The LTC2856-1, LTC2856-2, LTC2857-1, LTC2857-2, LTC2858-1 and LTC2858-2 are low power, RS485/RS422 transceivers operating on 5V supplies at maximum data rates of 20Mbps or 250kbps for low EMI. The receiver has a 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 thermal shutdown.

Enhanced ESD protection allows these parts to withstand ±15kV (human body model) on the transceiver interface pins without latch-up or damage.


Part Number	MAX Data Rate (Mbps)	Duplex	Package
LTC2856-1	20	Half	MSOP-8, DFN-8
LTC2856-2	0.25	Half	MSOP-8, DFN-8
LTC2857-1	20	Full	MSOP-8, DFN-8
LTC2857-2	0.25	Full	MSOP-8, DFN-8
LTC2858-1	20	Full	MSOP-10, DFN-10
LTC2858-2	0.25	Full	MSOP-10, DFN-10

Applications

Low Power RS485/RS422 Transceiver
Level Translator
Backplane Transceiver

Part Models: 24
1ku List Price: Starting From $1.89

Documentation

Data Sheet 1

LTC2856-1/LTC2856-2/LTC2857-1/LTC2857-2/LTC2858-1/LTC2858-2: 20Mbps and Slew Rate Limited 15kV RS485/RS422 Transceivers Data Sheet 10/03/2017

Reliability Data 1

R521 Reliability Data 03/26/2018

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
LTC2857CDD-1#PBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2857CDD-1#TRPBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2857CDD-2#PBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2857CDD-2#TRPBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2857CMS8-1#PBF	8-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2857CMS8-1#TRPBF	8-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2857CMS8-2#PBF	8-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2857CMS8-2#TRPBF	8-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2857HDD-1#PBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2857HDD-1#TRPBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2857HDD-2#PBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2857HDD-2#TRPBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2857HMS8-1#PBF	8-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2857HMS8-1#TRPBF	8-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2857HMS8-2#PBF	8-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2857HMS8-2#TRPBF	8-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2857IDD-1#PBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2857IDD-1#TRPBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2857IDD-2#PBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2857IDD-2#TRPBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2857IMS8-1#PBF	8-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2857IMS8-1#TRPBF	8-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2857IMS8-2#PBF	8-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2857IMS8-2#TRPBF	8-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Oct 11, 2022 - 22_0244 Epoxy Change from Henkel 8290 to 8290A for MSOP Package
		PCN22_0244_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LTC2857CMS8-1#PBF	PRODUCTION
LTC2857CMS8-1#TRPBF	PRODUCTION
LTC2857CMS8-2#PBF	PRODUCTION
LTC2857CMS8-2#TRPBF	PRODUCTION
LTC2857HMS8-1#PBF	PRODUCTION
LTC2857HMS8-1#TRPBF	PRODUCTION
LTC2857HMS8-2#PBF	PRODUCTION
LTC2857HMS8-2#TRPBF	PRODUCTION
LTC2857IMS8-1#PBF	PRODUCTION
LTC2857IMS8-1#TRPBF	PRODUCTION
LTC2857IMS8-2#PBF	PRODUCTION
LTC2857IMS8-2#TRPBF	PRODUCTION
Feb 3, 2020 - 20_0128 Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC
		PCN20_0128_Form Material_Report
LTC2857CMS8-1#PBF	PRODUCTION
LTC2857CMS8-1#TRPBF	PRODUCTION
LTC2857CMS8-2#PBF	PRODUCTION
LTC2857CMS8-2#TRPBF	PRODUCTION
LTC2857HMS8-1#PBF	PRODUCTION
LTC2857HMS8-1#TRPBF	PRODUCTION
LTC2857HMS8-2#PBF	PRODUCTION
LTC2857HMS8-2#TRPBF	PRODUCTION
LTC2857IMS8-1#PBF	PRODUCTION
LTC2857IMS8-1#TRPBF	PRODUCTION
LTC2857IMS8-2#PBF	PRODUCTION
LTC2857IMS8-2#TRPBF	PRODUCTION

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

Hardware Ecosystem

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

LTC2857

Part Details

Documentation

Data Sheet 1

Reliability Data 1

Video 1

Product Selector Card 2

Press Release 1

Hardware Ecosystem

Tools & Simulations

IBIS Model 2

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