LTC2856

PRODUCTION

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

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Overview

  • 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
LTC2856
20Mbps and Slew Rate Limited 15kV RS485/RS422 Transceiver
LTC2858-1 at 20Mbps Product Package 1 Product Package 2 Product Package 3 Product Package 4 Product Package 5 Product Package 6
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Documentation

Data Sheet 1

Reliability Data 1

Data Sheet

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

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Hardware Ecosystem

Parts Product Life Cycle Description
Interface Transceivers & Isolators 1
LTM2881
PRODUCTION Complete Isolated RS485/RS422 μModule Transceiver + Power
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Tools & Simulations

IBIS Model 2

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