{"id":8470,"date":"2026-06-29T02:14:03","date_gmt":"2026-06-29T02:14:03","guid":{"rendered":"https:\/\/materialparts.com\/max3232eidr\/"},"modified":"2026-06-29T06:27:56","modified_gmt":"2026-06-29T06:27:56","slug":"max3232eidr","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/max3232eidr\/","title":{"rendered":"MAX3232EIDR"},"content":{"rendered":"

\u4ea7\u54c1\u6982\u89c8<\/h2>\n

The MAX3232EIDR from Texas Instruments is a 3V to 5.5V dual-channel RS-232 transceiver with +\/-15 kV IEC ESD protection in a 16-pin SOIC package. It contains two drivers and two receivers, an on-chip dual charge pump requiring only four 0.1 uF external capacitors, and operates at data rates up to 250 kbps with 30 V\/us maximum driver output slew rate.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n
Drivers \/ Receivers<\/td>\n2 \/ 2<\/td>\n<\/tr>\n
\u7535\u6e90\u7535\u538b<\/td>\n3V to 5.5V<\/td>\n<\/tr>\n
\u6570\u636e\u901f\u7387<\/td>\n250 kbps max<\/td>\n<\/tr>\n
ESD Protection<\/td>\n+\/-15 kV HBM, +\/-8 kV IEC contact<\/td>\n<\/tr>\n
Supply Current<\/td>\n300 uA typ<\/td>\n<\/tr>\n
Driver Output Slew Rate<\/td>\n30 V\/us max<\/td>\n<\/tr>\n
External Capacitors<\/td>\n4 x 0.1 uF<\/td>\n<\/tr>\n
Logic Voltage (min)<\/td>\n3.3V compatible<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C to +85\u00b0C<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nSOIC-16 (9.9 x 3.9 mm)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • +\/-15 kV ESD protection on all RS-232 bus pins<\/li>\n
  • Operates from 3V to 5.5V single supply<\/li>\n
  • Only four 0.1 uF external capacitors required<\/li>\n
  • Accepts 5V logic input with 3.3V supply<\/li>\n
  • Low supply current: 300 uA typical<\/li>\n
  • Pin-compatible with higher-speed SN65C3232E (1 Mbps)<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Battery-powered RS-232 communication<\/li>\n
    • Notebook and laptop serial ports<\/li>\n
    • Handheld equipment serial interfaces<\/li>\n
    • Industrial serial communication links<\/li>\n
    • Embedded system debug UART interfaces<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The MAX3232EIDR from Texas Instruments is a 3V to 5.5V dual-channel RS-232 transceiver with +\/-15 kV IEC ESD protection in a 16-pin SOIC package. It contains two drivers and two receivers, an on-chip dual charge pump requiring only four 0.1 uF external capacitors, and operates at data rates up to 250 kbps with […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,20],"tags":[],"chip_brand":[259],"class_list":["post-8470","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","chip_brand-maxim"],"acf":{"brief_explanation":"3-5.5V dual RS-232 transceiver, 250kbps, +\/-15kV ESD, 2Tx\/2Rx, SOIC-16","date_code":"","package_case":"SOIC-16 (9.9 x 3.9 x 1.58 mm)","in_stock":10935,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/max3232e.pdf","price":"$0.80 @ 1ku","product_introduction":"The Texas Instruments MAX3232EIDR is a dual-channel RS-232 line driver and receiver with integrated +\/-15 kV IEC ESD protection, designed for 3V to 5.5V single-supply operation. It contains two drivers and two receivers, providing a complete DTE\/DCE serial port interface with an on-chip dual charge pump that generates the +\/-5.4V RS-232 output levels from a single 3.3V or 5V supply. Only four external 0.1 uF capacitors are required for the charge pump. The device operates at data rates up to 250 kbps with a maximum driver output slew rate of 30 V\/us, ensuring compliance with TIA\/EIA-232-F and ITU V.28 standards. The ESD protection covers all RS-232 bus pins including GND, providing robust immunity against electrostatic discharge events.","working_principle":"The MAX3232EIDR uses an on-chip dual charge pump to generate the positive and negative supply voltages required for RS-232 compliant output levels from a single 3V to 5.5V supply. The first charge pump (C1+\/C1-) doubles the input supply to approximately 2x VCC at the V+ pin, while the second charge pump (C2+\/C2-) inverts this to produce a negative voltage at the V- pin. These generated rails power the driver output stages, which swing between V+ and V- to produce RS-232 compliant voltage levels (typically +\/-5.4V with a 3.3V supply). The receivers convert RS-232 input levels (up to +\/-25V) to TTL\/CMOS logic levels compatible with the host microcontroller. The charge pump operates at a fixed internal oscillator frequency, and the four external 0.1 uF capacitors serve as the pump and storage elements for both charge pump stages.","pin_description":"
      Pin<\/th>Name<\/th>Description<\/th><\/tr>
      1<\/td>C1+<\/td>Positive terminal of C1 charge pump cap<\/td><\/tr>
      2<\/td>V+<\/td>Positive charge pump output (2x VCC)<\/td><\/tr>
      3<\/td>C1-<\/td>Negative terminal of C1 charge pump cap<\/td><\/tr>
      4<\/td>C2+<\/td>Positive terminal of C2 charge pump cap<\/td><\/tr>
      5<\/td>C2-<\/td>Negative terminal of C2 charge pump cap<\/td><\/tr>
      6<\/td>V-<\/td>Negative charge pump output<\/td><\/tr>
      7<\/td>DOUT2<\/td>RS-232 Driver 2 Output<\/td><\/tr>
      8<\/td>RIN2<\/td>RS-232 Receiver 2 Input<\/td><\/tr>
      9<\/td>ROUT2<\/td>TTL\/CMOS Receiver 2 Output<\/td><\/tr>
      10<\/td>DIN2<\/td>TTL\/CMOS Driver 2 Input<\/td><\/tr>
      11<\/td>DIN1<\/td>TTL\/CMOS Driver 1 Input<\/td><\/tr>
      12<\/td>ROUT1<\/td>TTL\/CMOS Receiver 1 Output<\/td><\/tr>
      13<\/td>RIN1<\/td>RS-232 Receiver 1 Input<\/td><\/tr>
      14<\/td>DOUT1<\/td>RS-232 Driver 1 Output<\/td><\/tr>
      15<\/td>GND<\/td>Ground<\/td><\/tr>
      16<\/td>VCC<\/td>Supply Voltage (3-5.5V)<\/td><\/tr><\/table>","application_scenarios":"
      • Embedded Debug UART<\/b>: MCU serial debug port with 3.3V operation and RS-232 level translation for factory test and development<\/li>
      • Industrial Serial Link<\/b>: Robust +\/-15 kV ESD-protected RS-232 communication in factory automation with 250 kbps data rate<\/li>
      • Battery-Powered Systems<\/b>: 300 uA supply current enables RS-232 communication in portable data loggers and handheld instruments<\/li>
      • Legacy PC Interface<\/b>: 5V logic input acceptance with 3.3V supply simplifies interfacing modern MCUs to legacy RS-232 equipment<\/li>
      • Point-of-Sale Terminal<\/b>: Serial port for receipt printer and barcode scanner connection with IEC ESD protection for high-traffic environments<\/li><\/ul>","alternative_models":"
        Model<\/th>Brand<\/th>Rate (kbps)<\/th>ESD (kV)<\/th>Package<\/th><\/tr>
        SN65C3232EDR<\/td>TI<\/td>1000<\/td>15<\/td>SOIC-16<\/td><\/tr>
        SP3232EEN<\/td>MaxLinear<\/td>250<\/td>15<\/td>SOIC-16<\/td><\/tr>
        ST3232EBDR<\/td>ST<\/td>250<\/td>15<\/td>SOIC-16<\/td><\/tr>
        HIN232CPZ<\/td>Renesas<\/td>120<\/td>2<\/td>DIP-16<\/td><\/tr>
        ICL3232EIVZ<\/td>Renesas<\/td>250<\/td>15<\/td>TSSOP-16<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/8470","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/comments?post=8470"}],"version-history":[{"count":1,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/8470\/revisions"}],"predecessor-version":[{"id":8592,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/8470\/revisions\/8592"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=8470"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=8470"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=8470"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=8470"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}