MAX3221, MAX3223, MAX3243 1µA电源电流、+3V至+5.5V、真RS-232收发器,带AutoShutdown

 
数据资料
完整的数据资料 (PDF, 464kB)
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概述
The MAX3221/MAX3223/MAX3243 achieve 1µA supply current with Maxim's revolutionary AutoShutdown™ feature. When the MAX3221/MAX3223/MAX3243 do not sense a valid signal level on their receiver inputs, the on-board power supply and drivers shut down. This occurs if the RS-232 cable is disconnected or if the transmitters of the connected peripheral are turned off. The system turns on again when a valid level is applied to any RS-232 receiver input. As a result, the system saves power without changes to the existing BIOS or operating system.

The MAX3221/MAX3223/MAX3243 transceivers are 3V-powered EIA/TIA-232 and V.28/V.24 communications interfaces intended for notebook computer applications. A proprietary, high-efficiency, dual charge-pump power supply and a low-dropout transmitter combine to deliver true RS-232 performance from a single +3.0V to +5.5V supply. A guaranteed data rate of 120kbps provides compatibility with popular software for communicating with personal computers.

The MAX3221/MAX3223/MAX3243 require only 0.1µF capacitors in 3.3V operation, and can operate from input voltages ranging from +3.0V to +5.5V. They are ideal for 3.3V-only systems, mixed 3.3V and 5.0V systems, or 5.0V-only systems that require true RS-232 performance.

The MAX3221 is a 1-driver/1-receiver 16-pin SSOP version of the 20-pin MAX3223 (2-driver/2-receiver). The MAX3243 3-driver/5-receiver, complete serial port is ideal for notebook or subnotebook computers. The MAX3243 includes one complementary always-active receiver. This receiver can monitor an external device (such as a modem) in shutdown, without forward biasing the protection diodes in a UART that may have VCC completely removed.

关键特性   应用/使用
  • For Space-Constrained Applications: MAX3228/MAX3229: +2.5V to +5.5V RS-232 Transceivers in UCSP™
  • For Integrated ESD Protection: MAX3222E/MAX3232E/MAX3237E/MAX3241E*/ MAX3246E: ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers (MAX3246E Available in UCSP Package)
  • For Low-Voltage or Data Cable Applications: MAX3380E/MAX3381E: +2.5V to +5.5V, 1µA, 2 Tx/2 Rx RS-232 Transceivers with ±15kV ESD-Protected I/O and Logic Pins

 
  • 电池供电设备
  • 手持式装置
  • 笔记本电脑、亚笔记本电脑与掌上电脑
  • 外设
  • 打印机

    Key Specifications:   RS-232 Line Driver/Receivers
    Part Number Supply Voltage (V) Number of Tx Number of Rx Data Rate (kbps) Typ. ICC Current (mA) Internal Charge Pump Number of Ext. Caps Nom. Cap. Value (µF) Number of Rx Active in Shutdown Features Min. Foot-
    print (mm2)
    RoHS Available Operating Temp. Range (°C) Price*
    MAX3221  3.3 5 1 1 120 0.3 Yes 4 0.1 1
    Auto-Shutdown
    Micropower
    Three State Rx O/P
    33 Yes -40 to +85 0 to +70 $1.25 @ 1k
    MAX3223  2 2 2
    Auto-Shutdown
    Micropower
    Three State Rx O/P
    43 $1.85 @ 1k
    MAX3243  3 5 1
    Auto-Shutdown
    Micropower
    Three State Rx O/P
    True RS-232
    64 $3.11 @ 1k
    See All RS-232 Line Driver/Receivers (151)
    Notes:
    *This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

    图表
    典型工作电路







    应用笔记
  • App Note 206: Using a PC's RS-232 Serial Port To Communicate with 2-Wire Devices - MAX3221, MAX3223 (English only)
  • App Note 588: Multiplexer Enables Pseudomultidrop RS-232 Transmission - MAX3221 (English only)
  • App Note 654: New RS-232 ICs Feature 1µA Supply Current, ±15kV ESD Protection, and 3V Operation - MAX3223, MAX3243 (English only)
  • App Note 882: RS-232 Features Explained - MAX3221, MAX3223, MAX3243 (English only)
  • App Note 2141: Determining Clock Accuracy Requirements for UART Communications - MAX3221, MAX3223, MAX3243 (English only)
  • 应用笔记2588:利用RS232口为光纤数据环路供电 - MAX3221

    评估板

    设计指南
  • 接口电路 (PDF)

    可靠性报告
  • 查询FIT数据:
  • 可靠性报告: MAX3221xxE.pdf MAX3223xxP.pdf MAX3243xxI.pdf (English only)

    软件/模型
  • MAX3221 IBIS模型

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