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Maxim产品 - MAX3491E介绍

MAX3491E - 3.3V供电、±15kV ESD保护、12Mbps、限摆率、真RS-485/RS-422收发器

MAX3491E是Maxim美信半导体公司的一款传感器与传感器接口产品，MAX3491E是3.3V供电、±15kV ESD保护、12Mbps、限摆率、真RS-485/RS-422收发器，本站介绍了MAX3491E的封装应用图解、特点和优点、功能等，并给出了与MAX3491E相关的Maxim元器件型号供参考。

MAX3491E - 3.3V供电、±15kV ESD保护、12Mbps、限摆率、真RS-485/RS-422收发器 - 传感器与传感器接口 - Maxim美信半导体高性能芯片品质 - 美信半导体

产品概述

Devices in the MAX3483E family (MAX3483E/MAX3485E/MAX3486E/MAX3488E/MAX3490E/MAX3491E) are ±15kV ESD-protected, +3.3V, low-power transceivers for RS-485 and RS-422 communications. Each device contains one driver and one receiver. The MAX3483E and MAX3488E feature slew-rate-limited drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free data transmission at data rates up to 250kbps. The partially slew-rate-limited MAX3486E transmits up to 2.5Mbps. The MAX3485E, MAX3490E, and MAX3491E transmit at up to 12Mbps.

All devices feature enhanced electrostatic discharge (ESD) protection. All transmitter outputs and receiver inputs are protected to ±15kV using IEC 1000-4-2 Air-Gap Discharge, ±8kV using IEC 1000-4-2 Contact Discharge, and ±15kV using the Human Body Model.

Drivers are short-circuit current limited and are protected against excessive power dissipation by thermal shutdown circuitry that places the driver outputs into a high-impedance state. The receiver input has a fail-safe feature that guarantees a logic-high output if both inputs are open circuit.

The MAX3488E, MAX3490E, and MAX3491E feature full-duplex communication, while the MAX3483E, MAX3485E, and MAX3486E are designed for half-duplex communication.

关键特性
  • 以下关键特性由Maxim美信半导体提供：
  • ESD Protection for RS-485 I/O Pins
  • ±15kV-Human Body Model
  • ±8kV-IEC 1000-4-2, Contact Discharge
  • ±15kV-IEC 1000-4-2, Air-Gap Discharge
  • Operate from a Single +3.3V Supply-No Charge Pump Required
  • Interoperable with +5V Logic
  • Guaranteed 12Mbps Data Rate (MAX3485E/MAX3490E/MAX3491E)
  • Slew-Rate Limited for Errorless Data Transmission (MAX3483E/MAX3488E)
  • 2nA Low-Current Shutdown Mode (MAX3483E/MAX3485E/MAX3486E/MAX3491E)
  • -7V to +12V Common-Mode Input Voltage Range
  • Full-Duplex and Half-Duplex Versions Available
  • Industry-Standard 75176 Pinout (MAX3483E/MAX3485E/MAX3486E)
  • Current-Limiting and Thermal Shutdown for Driver Overload Protection
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