MAX3222, MAX3232, MAX3237, MAX3241 3.0V至5.5V、低功耗、1Mbps、真RS-232收发器,使用四只0.1µF外部电容

数据资料
完整的数据资料 (PDF, 760kB)
英文 Download this datasheet in PDF format下载

概述
The MAX3222/MAX3232/MAX3237/MAX3241 transceivers have a proprietary low-dropout transmitter output stage enabling true RS-232 performance from a 3.0V to 5.5V supply with a dual charge pump. The devices require only four small 0.1µF external charge-pump capacitors. The MAX3222, MAX3232, and MAX3241 are guaranteed to run at data rates of 120kbps while maintaining RS-232 output levels. The MAX3237 is guaranteed to run at data rates of 250kbps in the normal operating mode and 1Mbps in the MegaBaud™ operating mode, while maintaining RS-232 output levels.

The MAX3222/MAX3232 have 2 receivers and 2 drivers. The MAX3222 features a 1µA shutdown mode that reduces power consumption and extends battery life in portable systems. Its receivers remain active in shutdown mode, allowing external devices such as modems to be monitored using only 1µA supply current. The MAX3222 and MAX3232 are pin, package, and functionally compatible with the industry-standard MAX242 and MAX232, respectively.

The MAX3241 is a complete serial port (3 drivers/5 receivers) designed for notebook and subnotebook computers. The MAX3237 (5 drivers/3 receivers) is ideal for fast modem applications. Both these devices feature a shutdown mode in which all receivers can remain active while using only 1µA supply current. Receivers R1 (MAX3237/MAX3241) and R2 (MAX3241) have extra outputs in addition to their standard outputs. These extra outputs are always active, allowing external devices such as a modem to be monitored without forward biasing the protection diodes in circuitry that may have VCC completely removed.

The MAX3222, MAX3237, and MAX3241 are available in space-saving TSSOP and SSOP packages.

关键特性   应用/使用
  • For Smaller Packaging:
    • MAX3228E/MAX3229E: +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
  • For Low-Voltage or Data Cable Applications:
    • MAX3380E/MAX3381E: +2.35V 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
  • 高速调制解调器
  • 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*
    MAX3222  3.3 5 2 2 120 0.3 Yes 4 0.1 2
    Shutdown
    Three State Rx O/P
    43 Yes -40 to +85 0 to +70 $1.69 @ 1k
    MAX3232  2 2 120 0.3  - 
    True RS-232
    33 $1.69 @ 1k
    MAX3237  5 3 1,000 0.5 3
    Megabaud Data Rate
    Shutdown
    Three State Rx O/P
    True RS-232
    82 $3.29 @ 1k
    MAX3241  3 5 120 0.3 5
    Micropower
    Shutdown
    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
    MAX3222,MAX3232,MAX3237,MAX3241:Typical Operating Circuits
    典型工作电路

    应用笔记
  • App Note 654: New RS-232 ICs Feature 1µA Supply Current, ±15kV ESD Protection, and 3V Operation - MAX3222, MAX3232, MAX3241 (English only)
  • App Note 723: Selecting and Using RS-232, RS-422, and RS-485 Serial Data Standards - MAX3232 (English only)
  • App Note 761: Automatic Test Equipment on a Budget - MAX3232 (English only)
  • App Note 2141: Determining Clock Accuracy Requirements for UART Communications - MAX3222, MAX3232, MAX3237, MAX3241 (English only)
  • 应用笔记2394:MAX1169 ADC与PIC微控制器的接口 - MAX3232
  • App Note 3024: IrDA and RS-232: A Match Made in Silicon - MAX3222 (English only)
  • App Note 3424: RS-232 Powered Temperature Sensor - MAX3232 (English only)

    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: MAX3222xxx.pdf MAX3232xxE.pdf MAX3241xxI.pdf (English only)
  • 申请可靠性报告: (English only)

    软件/模型
  • MAX3232 IBIS模型

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