MAX14855 - 2.75kVRMS Isolated 500kbps/25Mbps Full-DuplexRS-485/RS-422 Transceivers with ±35kV ESDProtection and Integrated Transformer Driver

MAX14855是Maxim美信半导体公司的一款传感器与传感器接口产品，MAX14855是2.75kVRMS Isolated 500kbps/25Mbps Full-DuplexRS-485/RS-422 Transceivers with ±35kV ESDProtection and Integrated Transformer Driver，本站介绍了MAX14855的封装应用图解、特点和优点、功能等，并给出了与MAX14855相关的Maxim元器件型号供参考。

MAX14855 - 2.75kVRMS Isolated 500kbps/25Mbps Full-DuplexRS-485/RS-422 Transceivers with ±35kV ESDProtection and Integrated Transformer Driver - 传感器与传感器接口 - Industry's Most Robust Isolated RS-485 - 美信半导体

产品概述

The MAX14853/MAX14855 isolated RS-485/RS-422transceivers provide 2750VRMS (60s) of galvanic isolationbetween the cable-side (RS-485/RS-422 driver/receiver-side) and the UART-side of the device. Isolationimproves communication by breaking ground loops andreduces noise when there are large differences in groundpotential between ports. These devices allow for robustcommunication up to 500kbps (MAX14853) or 25Mbps(MAX14855).

The MAX14853/MAX14855 include an integrated 450kHztransformer driver for power transfer to the cable-side ofthe transceiver using an external transformer. An integratedLDO provides a simple and space-efficient architecturefor providing power to the cable-side of the IC.

The MAX14853/MAX14855 include one drive channeland one receive channel. The receiver is ?-unit load,allowing up to 128 transceivers on a common bus.

Integrated true fail-safe circuitry ensures a logic-high onthe receiver output when inputs are shorted or open.Undervoltage lockout disables the driver when cable-sideor UART-side power supplies are below functional levels.

The driver outputs and receiver inputs are protectedfrom ±35kV electrostatic discharge (ESD) to GNDB onthe cable-side, as specified by the Human Body Model(HBM).

The MAX14853/MAX14855 are available in a wide body16-pin SOIC package and operate over the -40°C to+105°C temperature range.

关键特性

以下关键特性由Maxim美信半导体提供：

Higher Integration Simplifies Designs

Integrated LDO for Powering Cable-Side

Integrated Transformer Driver for Power Transfer toCable-Side

High-Performance Transceiver Enables FlexibleDesigns

Compliant with RS-485 EIA/TIA-485 Standard

500kpbs (MAX14853)/25Mbps (MAX14855)Maximum Data Rate

Up to 128 Devices on the Bus

Integrated Protection Ensures for RobustCommunication

±35kV ESD (HBM) on Driver Outputs/ReceiverInputs

2.75kVRMS Withstand Isolation Voltage for 60s(VISO)

630VPEAK Maximum Repetitive Peak IsolationVoltage (VIORM)

445VRMS Maximum Working Isolation Voltage(VIOWM)

> 30 Years Lifetime at Rated Working Voltage

Withstands ±10kV Surge per IEC 61000-4-5

Thermal Shutdown

热门应用

HVAC

工业自动控制

电表

可编程逻辑控制器

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