Analog Devices / Maxim Integrated MAX348x/MAX349x RS-485/RS-422 收发器
Maxim MAX348x/MAX349x RS-485/RS-422 收发器是一款用于 RS-485 和 RS-422 通信的 3.3V 低功耗收发器。 每一款收发器都包含一个驱动器和一个接收器。 MAX3483 和 MAX3488 具有转换率受限的驱动器，可将 EMI 辐射降至最低以及减少因电缆端接不当导致的反射，实现在高达 250kbps 的数据传输速度下零误差传输数据。 转换率部分受限的 MAX3486 器件的传输速度可达 2.5Mbps。 MAX3485、MAX3490 和 MAX3491 的传输速度可达 10Mbps。 驱动器采用短路限流设计，通过将驱动器输出置于高阻抗状态的热关断电路保护器件免受功率过度耗散。 MAX3488、MAX3490 和 MAX3491 可用于全双工通信，而 MAX3483、MAX3485 和 MAX3486 则设计用于半双工通信。
The Analog Devices MAX348x and MAX349x RS-485/RS-422 Transceivers are short-circuited current limited and are protected against excessive power dissipation by thermal shutdown circuitry that places the driver outputs into a high-impedance state. The MAX3488, MAX3490, and MAX3491 feature full-duplex communication, while the MAX3483, MAX3485, and MAX3486 are designed for half-duplex communication.
特性
- Operate from a Single 3.3V Supply; No Charge Pump
- Interoperable with +5V Logic
- 8ns Max Skew (MAX3485, MAX3490, MAX3491)
- Slew-Rate Limited for Errorless Data Transmission (MAX3483, MAX3488)
- 2nA Low-Current Shutdown Mode (MAX3483, MAX3485, MAX3486, MAX3491)
- -7V to +12V Common-Mode Input Voltage Range
- Allows up to 32 Transceivers on the Bus
- Full-Duplex and Half-Duplex Versions Available
- Industry Standard 75176 Pinout (MAX3483, MAX3485, MAX3486)
- Current-Limiting and Thermal Shutdown for Driver Overload Protection
应用
- Industrial Control Local Area Networks
- Integrated Services Digital Networks
- Low-Power RS-485/RS-422 Transceivers
- Packet Switching
- Telecommunications
- Transceivers for EMI-Sensitive Applications
Typical Application Circuits
发布日期: 2016-09-21
| 更新日期: 2023-04-21