{"id":7790,"date":"2026-06-27T03:11:56","date_gmt":"2026-06-27T03:11:56","guid":{"rendered":"https:\/\/ic-vendor.com\/max3221caet\/"},"modified":"2026-06-28T10:09:47","modified_gmt":"2026-06-28T10:09:47","slug":"max3221caet","status":"publish","type":"post","link":"https:\/\/ic-vendor.com\/es\/max3221caet\/","title":{"rendered":"MAX3221CAE+T"},"content":{"rendered":"

Productos<\/h2>\n

The MAX3221CAE+T is a 1-driver\/1-receiver RS-232 transceiver from Analog Devices (formerly Maxim Integrated) with AutoShutdown feature. It achieves 1 \u00b5A supply current in shutdown mode, operates from +3.0 V to +5.5 V single supply, and requires only 0.1 \u00b5F charge-pump capacitors in a 16-pin SSOP package.<\/p>\n

Especificaciones<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n
Drivers \/ Receivers<\/td>\n1 \/ 1<\/td>\n<\/tr>\n
Protocol<\/td>\nRS-232<\/td>\n<\/tr>\n
Velocidad de datos<\/td>\n235 kbps<\/td>\n<\/tr>\n
Tensi\u00f3n de alimentaci\u00f3n<\/td>\n+3.0 V to +5.5 V<\/td>\n<\/tr>\n
Shutdown Current<\/td>\n1 \u00b5A<\/td>\n<\/tr>\n
AutoShutdown<\/td>\nAfter 30 \u00b5s receiver inactivity<\/td>\n<\/tr>\n
Charge-Pump Capacitors<\/td>\n0.1 \u00b5F (at 3.3V)<\/td>\n<\/tr>\n
Receiver Hysteresis<\/td>\n300 mV<\/td>\n<\/tr>\n
Duplex<\/td>\nFull<\/td>\n<\/tr>\n
Temperatura de funcionamiento<\/td>\n0\u00b0C to +70\u00b0C (C grade)<\/td>\n<\/tr>\n
Paquete<\/td>\nSSOP-16 (AE)<\/td>\n<\/tr>\n<\/table>\n

Caracter\u00edsticas<\/h2>\n
    \n
  • AutoShutdown achieves 1 \u00b5A supply current<\/li>\n
  • Operates from +3.0 V to +5.5 V single supply<\/li>\n
  • Only 0.1 \u00b5F capacitors required at 3.3 V<\/li>\n
  • Integrated dual charge pump eliminates \u00b112 V supply<\/li>\n
  • AutoShutdown enabled after 30 \u00b5s of receiver inactivity<\/li>\n
  • Software shutdown control option<\/li>\n
  • INVALID output detects valid RS-232 signal<\/li>\n
  • FORCEON\/FORCEOFF pins for manual control<\/li>\n<\/ul>\n

    Aplicaciones<\/h2>\n
      \n
    • Battery-powered equipment<\/li>\n
    • Hand-held devices<\/li>\n
    • Peripheral interfaces<\/li>\n
    • Portable diagnostic equipment<\/li>\n
    • Point-of-sale terminals<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The MAX3221CAE+T is a 1-driver\/1-receiver RS-232 transceiver from Analog Devices (formerly Maxim Integrated) with AutoShutdown feature. It achieves 1 \u00b5A supply current in shutdown mode, operates from +3.0 V to +5.5 V single supply, and requires only 0.1 \u00b5F charge-pump capacitors in a 16-pin SSOP package. Key Specifications Drivers \/ Receivers 1 \/ […]<\/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":[],"class_list":["post-7790","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics"],"acf":{"brief_explanation":"1Tx\/1Rx RS-232 transceiver, AutoShutdown 1\u00b5A, 3-5.5V, 235kbps, SSOP-16","date_code":"","package_case":"SSOP-16 (0.209\", 5.30mm Width)","in_stock":6492,"datasheet":"https:\/\/www.analog.com\/media\/en\/technical-documentation\/data-sheets\/MAX3221-MAX3243.pdf","price":"$2.29 @ 1ku","product_introduction":"The MAX3221CAE+T is a 1-driver\/1-receiver RS-232 transceiver with Maxim's revolutionary AutoShutdown feature. When the device does not sense a valid signal level on its receiver inputs for 30 \u00b5s, the onboard power supply and drivers shut down, reducing supply current to 1 \u00b5A. The system automatically turns on again when a valid RS-232 level is applied to the receiver input. A proprietary, high-efficiency, dual charge-pump power supply and low-dropout transmitter combine to deliver true RS-232 performance from a single +3.0 V to +5.5 V supply. The device requires only 0.1 \u00b5F capacitors in 3.3 V operation.","working_principle":"The MAX3221 uses an integrated dual charge-pump circuit to generate \u00b15.5 V RS-232 voltage levels from a single +3.0 V to +5.5 V supply. The first charge pump doubles the supply voltage to approximately +5.5 V (V+), while the second inverts this to approximately -5.5 V (V-). The transmitter converts TTL\/CMOS logic levels to RS-232 compliant levels using these generated voltages. The receiver converts RS-232 input levels to TTL\/CMOS output levels with 300 mV hysteresis for noise immunity. The AutoShutdown circuit monitors receiver inputs; if no valid RS-232 signal is detected for 30 \u00b5s, it disables the charge pumps and drivers to save power. The FORCEON and FORCEOFF pins provide manual override of the automatic shutdown. The INVALID output indicates whether a valid RS-232 signal is present.","pin_description":"\n
      Pin<\/th>Name<\/th>Type<\/th>Description<\/th><\/tr>\n
      1<\/td>EN<\/td>Input<\/td>Receiver enable (active low)<\/td><\/tr>\n
      2<\/td>C1+<\/td>Analog<\/td>Voltage doubler capacitor positive<\/td><\/tr>\n
      3<\/td>V+<\/td>Power<\/td>+5.5V generated by charge pump<\/td><\/tr>\n
      4<\/td>C1-<\/td>Analog<\/td>Voltage doubler capacitor negative<\/td><\/tr>\n
      5<\/td>C2+<\/td>Analog<\/td>Inverting capacitor positive<\/td><\/tr>\n
      6<\/td>C2-<\/td>Analog<\/td>Inverting capacitor negative<\/td><\/tr>\n
      7<\/td>V-<\/td>Power<\/td>-5.5V generated by charge pump<\/td><\/tr>\n
      8<\/td>RIN<\/td>Input<\/td>RS-232 receiver input<\/td><\/tr>\n
      9<\/td>ROUT<\/td>Output<\/td>TTL\/CMOS receiver output<\/td><\/tr>\n
      10<\/td>INVALID<\/td>Output<\/td>Valid RS-232 signal detector output<\/td><\/tr>\n
      11<\/td>TIN<\/td>Input<\/td>TTL\/CMOS transmitter input<\/td><\/tr>\n
      12<\/td>FORCEON<\/td>Input<\/td>Force-on override (active high)<\/td><\/tr>\n
      13<\/td>TOUT<\/td>Output<\/td>RS-232 transmitter output<\/td><\/tr>\n
      14<\/td>GND<\/td>Power<\/td>Ground<\/td><\/tr>\n
      15<\/td>VCC<\/td>Power<\/td>Supply voltage (+3.0 to +5.5V)<\/td><\/tr>\n
      16<\/td>FORCEOFF<\/td>Input<\/td>Force-off shutdown (active low)<\/td><\/tr>\n<\/table>","application_scenarios":"
        \n
      • Battery-Powered Devices:<\/strong> 1 \u00b5A AutoShutdown current extends battery life when RS-232 cable is disconnected<\/li>\n
      • Hand-Held Instruments:<\/strong> Single 3.3V operation and minimal external components reduce system complexity<\/li>\n
      • Portable Diagnostics:<\/strong> AutoShutdown automatically powers down when not communicating, preserving battery<\/li>\n
      • Point-of-Sale Terminals:<\/strong> INVALID output enables cable detection for hot-plug capability<\/li>\n
      • Peripheral Interfaces:<\/strong> 235 kbps data rate supports standard RS-232 communication protocols<\/li>\n<\/ul>","alternative_models":"\n
        Model<\/th>Manufacturer<\/th>Key Difference<\/th>Package<\/th>Channels<\/th><\/tr>\n
        MAX3223CAP+T<\/td>ADI<\/td>2Tx\/2Rs version in 20-pin SSOP for applications needing two serial ports<\/td>SSOP-20<\/td>2Tx\/2Rx<\/td><\/tr>\n
        MAX3243CAI+T<\/td>ADI<\/td>3Tx\/5Rx version with always-active receiver for multi-channel serial interfaces<\/td>SSOP-28<\/td>3Tx\/5Rx<\/td><\/tr>\n
        SP3221ECY-L\/TR<\/td>Silicon Labs<\/td>Pin-compatible 1Tx\/1Rx with equivalent 1uA shutdown and 250kbps data rate<\/td>TSSOP-16<\/td>1Tx\/1Rx<\/td><\/tr>\n
        ST3221EBPR<\/td>ST<\/td>Direct equivalent with 3-5.5V supply and enhanced \u00b115kV ESD on RS-232 pins<\/td>TSSOP-16<\/td>1Tx\/1Rx<\/td><\/tr>\n
        TRS3221EIPWR<\/td>TI<\/td>1uA auto-powerdown, \u00b115kV HBM ESD, 250kbps compatible with 3V logic<\/td>TSSOP-16<\/td>1Tx\/1Rx<\/td><\/tr>\n
        MAX3221EAE+T<\/td>ADI<\/td>Enhanced ESD version with \u00b115kV IEC 61000-4-2 on all RS-232 pins<\/td>SSOP-16<\/td>1Tx\/1Rx<\/td><\/tr>\n<\/table>\n

        The MAX3221 is a 1Tx\/1Rx 3.3V RS-232 transceiver with 1uA auto-powerdown feature. For multi-port applications, MAX3232 (2Tx\/2Rx) or MAX3243 (3Tx\/5Rx) provide additional channels. All are 3V-5.5V compatible and require only four 0.1uF charge pump capacitors.<\/p>"},"_links":{"self":[{"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/posts\/7790","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/comments?post=7790"}],"version-history":[{"count":0,"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/posts\/7790\/revisions"}],"wp:attachment":[{"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/media?parent=7790"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/categories?post=7790"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/tags?post=7790"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/chip_brand?post=7790"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}