ADI LTC2851IS8

Mfr. Part

LTC2851IS8

Manufacturer

ADI (Analog Devices, Inc.). Y-IC is a quality distributor for ADI and we are committed to delivering the best products and services to every customer.

Detailed Description

LTC2851IS8 is an industrial‑grade, half‑duplex RS‑485/RS‑422 transceiver in a compact 8‑lead SOIC package. It integrates a differential line driver and a differential receiver with separate enable controls for simple direction management on shared two‑wire buses. The device is designed for robust, low‑power, long‑distance, multi‑drop serial communication in noisy industrial environments. The IS8 suffix indicates industrial temperature range and the standard S8 8‑lead SOIC package. Current available stock at Y-IC: 2232 pcs.

Key Features

Half‑duplex RS‑485/RS‑422 transceiver in 8‑pin SOIC footprint

Integrated differential driver and receiver with independent enable pins

Designed for rugged industrial use and long cable runs

Receiver failsafe design to provide a defined logic level with open/shorted/idle bus (see datasheet for specifics)

Low power operation with shutdown capability

Hot‑swap tolerant inputs and protection features common to the LTC285x family

Short‑circuit current limiting and thermal protection on the driver

Multi‑drop network support for shared bus operation (node count depends on unit load; see datasheet)

Wide industrial temperature support (I‑grade; see datasheet for exact range)

Pinout optimized for simple RS‑485 interface with minimal external components

Key Advantages

Reliable communication on noisy, long RS‑485 lines thanks to robust receiver design

Simple, direct control of transmit/receive direction using DE and RE pins

Compact 8‑pin SOIC reduces PCB space and simplifies routing

Industrial temperature grade for harsh environments

Proven Linear Technology/ADI transceiver lineage for stability and longevity

Family options allow you to choose between high‑speed or slew‑rate‑limited behavior to balance EMI and throughput (see family table in datasheet)

Packaging

Type: SOIC‑8 (S8), surface‑mount, gull‑wing leads

Material: Molded epoxy package over copper leadframe, matte‑tin plated leads, RoHS compliant

Size: Approx. 4.9 mm x 3.9 mm body, ~1.5 mm height; lead pitch 1.27 mm (standard JEDEC MS‑012 outline)

Pin configuration (typical for LTC285x half‑duplex family; verify in datasheet): RO, RE, DE, DI, GND, A, B, VCC

Thermal characteristics: Standard SOIC thermal behavior; use adequate copper for heat spreading. Refer to datasheet for θJA/θJC under your board conditions.

Electrical properties related to package: Pb‑free lead finish, MSL per datasheet; bus pins include ESD protection and fault handling features characteristic of the LTC285x family. See datasheet for exact ESD levels and absolute maximum ratings.

Lifecycle

Status: Active according to last available information. Not announced as NRND or EOL to our knowledge.

Family/close alternatives from ADI for similar roles:

- LTC2850IS8 and LTC2852IS8 (same family, different data‑rate/feature variants)

- ADM3072E series (robust RS‑485 transceivers with enhanced ESD)

- ADM485/ADM3485E (classic ADI/Maxim‑compatible RS‑485 options)

Cross‑vendor alternatives for similar function and footprint class (verify pin/function compatibility and specs before substitution):

- Texas Instruments SN65HVD3082E, SN65HVD3085E

- Maxim Integrated MAX3485E, MAX485E

- Renesas ISL3170E series

If you need exact drop‑in or application‑specific replacements, please contact our Y‑IC sales team via our website for tailored recommendations.

Key Application Areas

Industrial RS‑485 networks: Modbus/RTU, BACnet MS/TP, proprietary multi‑drop links

Building automation and HVAC controllers

Motor drives, PLC backplanes, I/O modules, sensors, and actuators

Security systems, access control, alarm panels

Energy meters, power systems monitoring, and grid interface equipment

Stage lighting and control networks such as DMX512 and similar protocols

Long‑distance, noisy environments requiring differential serial communication

Datasheet

Y‑IC hosts the most authoritative and up‑to‑date datasheet for LTC2851IS8 on our product page. We strongly recommend downloading it from this page to get exact electrical specifications, timing, ESD levels, pin assignments, and application notes.

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