• 简体中文
• English

MAX3157：高共模抑制比RS-485收发器，带有±50V隔离

低成本、±50V隔离、RS-485/RS-422收发器，提供表贴封装

The MAX3157 is a high CMRR RS-485/RS-422 data-communications interface providing ±50V isolation in a hybrid microcircuit. A single +5V supply on the logic side powers both sides of the interface, with external ±50V capacitors transferring power from the logic side to the isolated side. Each MAX3157 contains one transmitter and one receiver and is guaranteed to operate at data rates up to 250kbps. Drivers are short-circuit current limited and 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 receiver output if the inputs are open, shorted, or connected to a terminated transmission line with all drivers disabled. The MAX3157 typically draws 25mA of supply current when unloaded or when fully loaded with the driver disabled. Supply current drops to 25µA when the device is placed in shutdown mode. The device is pin selectable between half- and full-duplex mode and also features independently programmable receiver and transmitter output phase through separate pins. The MAX3157 is a low-cost replacement for opto-isolated transceivers. For fully isolated RS-485/RS-422 transceivers, refer to the MAX1480 family data sheet.

关键特性 ±50V Isolated Data Interface +5V Single Supply Low-Cost Replacement for Opto-Isolated Transceivers True Fail-Safe Receiver While Maintaining EIA/TIA-485 Compliance Pin-Selectable Full/Half-Duplex Operation Phase Controls to Correct for Twisted-Pair Reversal 25µA Low-Power Shutdown Mode Thermal Shutdown for Driver Overload Protection 28-Pin SSOP Package Slew Rate Limited Reduced EMI

MAX3157：典型工作电路 应用 自动测试设备(ATE) 楼宇能源管理(HVAC) 楼宇安全/遥控相机 高速接入(电信) 工业传感器发送器/变送器 电机及运动控制 POS终端 可编程逻辑控制器 远端摄像机 电信交换机 测试与测量设备 X射线与超声诊断

数据手册DataSheet

关键参数

技术资料

• Understanding Common-Mode Signals
• Using the MAX3157 High-CMR RS-485 Transceivers
• RS-485 (EIA/TIA-485) Differential Data Transmission System Basics

质量和环境数据

• MAX3157.pdf

相关产品

• MAX1480B：完备的隔离型、RS-485/RS-422数据接口
• MAX1490B：完备的隔离型、RS-485/RS-422数据接口
• MAX1490A：完备的隔离型、RS-485/RS-422数据接口
• MAX1480A：完备的隔离型、RS-485/RS-422数据接口
• MAX3480A：完备的、隔离型、3.3V、RS-485/RS-422数据接口
• MAX3480B：完备的、隔离型、3.3V、RS-485/RS-422数据接口

订购型号