{"id":9018,"date":"2026-07-02T02:51:11","date_gmt":"2026-07-02T02:51:11","guid":{"rendered":"https:\/\/materialparts.com\/max485csa\/"},"modified":"2026-07-03T08:03:04","modified_gmt":"2026-07-03T08:03:04","slug":"max485csa","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/max485csa\/","title":{"rendered":"MAX485CSA+"},"content":{"rendered":"

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

The MAX485CSA+ is an Analog Devices low-power RS-485\/RS-422 transceiver with 5V supply, 2.5Mbps data rate, half-duplex operation, +\/-1500V ESD HBM, fail-safe receiver, and up to 32 nodes per bus. Packaged in SOIC-8, 0C to +70C.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n
\u7535\u6e90\u7535\u538b<\/td>\n5 V single<\/td>\n<\/tr>\n
\u6570\u636e\u901f\u7387<\/td>\n2.5 Mbps<\/td>\n<\/tr>\n
\u62d3\u6251\u7ed3\u6784<\/td>\nHalf-duplex (1 driver + 1 receiver)<\/td>\n<\/tr>\n
Common Mode Range<\/td>\n-7 V to +12 V<\/td>\n<\/tr>\n
Supply Current<\/td>\n120-500 uA<\/td>\n<\/tr>\n
\u5173\u673a\u7535\u6d41<\/td>\n0.1 uA typ<\/td>\n<\/tr>\n
ESD Protection<\/td>\n+\/-1500V HBM<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nSOIC-8 (Narrow)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • 5V single-supply operation<\/li>\n
  • 2.5Mbps data rate (unrestricted driver)<\/li>\n
  • Half-duplex RS-485\/RS-422 transceiver<\/li>\n
  • Up to 32 transceivers on one bus<\/li>\n
  • +\/-1500V HBM ESD protection<\/li>\n
  • Fail-safe receiver (open input = high output)<\/li>\n
  • Driver short-circuit current limiting<\/li>\n
  • Thermal shutdown protection<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Industrial control LANs<\/li>\n
    • Low-power RS-485 transceivers<\/li>\n
    • Level translators for EMI-sensitive apps<\/li>\n
    • Building automation networks<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The MAX485CSA+ is an Analog Devices low-power RS-485\/RS-422 transceiver with 5V supply, 2.5Mbps data rate, half-duplex operation, +\/-1500V ESD HBM, fail-safe receiver, and up to 32 nodes per bus. Packaged in SOIC-8, 0C to +70C. Key Specifications Supply Voltage 5 V single Data Rate 2.5 Mbps Topology Half-duplex (1 driver + 1 receiver) […]<\/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":[647],"chip_brand":[165],"class_list":["post-9018","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","tag-max485csa","chip_brand-adi"],"acf":{"brief_explanation":"5V RS-485 transceiver, 2.5Mbps, half-duplex, SOIC-8","date_code":"","package_case":"8-Pin SOIC Narrow (4.9 x 3.9 x 1.5 mm)","in_stock":9898,"datasheet":"https:\/\/www.analog.com\/media\/en\/technical-documentation\/data-sheets\/MAX1487-MAX491.pdf","price":"$2.88 @ 1ku","product_introduction":"The MAX485CSA+ is an Analog Devices (formerly Maxim Integrated) low-power RS-485\/RS-422 transceiver in an 8-pin narrow SOIC package. The device contains one differential driver and one differential receiver, configured for half-duplex communication on a shared RS-485 bus. The 5V single-supply operation and 2.5Mbps maximum data rate make it one of the most widely used RS-485 transceivers for industrial communication. The driver output enables (DE) and receiver output enables (RE) allow independent control of the driver and receiver, enabling half-duplex operation with direction control. The -7V to +12V common-mode input range exceeds the RS-485 specification, providing robustness in noisy industrial environments. The fail-safe receiver feature ensures the receiver output is high when the bus inputs are open (floating), preventing erroneous data reception on unoccupied buses. The driver includes short-circuit current limiting and thermal shutdown protection.","working_principle":"The MAX485CSA+ converts TTL\/CMOS logic levels to RS-485 differential signaling. The driver takes single-ended data from the DI (driver input) pin and drives complementary signals on the A and B bus outputs when DE is high. When DI is high, the driver makes A higher than B (differential positive); when DI is low, B is higher than A (differential negative). The receiver senses the differential voltage between A and B when RE is low. If A exceeds B by at least 200mV, the receiver output (RO) is high; if B exceeds A by 200mV, RO is low. The fail-safe feature ensures RO is high when the inputs are open, shorted, or terminated but not driven. For half-duplex operation, the DE and RE pins are typically connected together so that the device is either transmitting (DE=RE=high) or receiving (DE=RE=low). The driver and receiver three-state outputs are in high-impedance when disabled, allowing multiple transceivers to share the bus.","pin_description":"
      Pin<\/th>Mnemonic<\/th>Description<\/th><\/tr>
      1<\/td>RO<\/td>Receiver output<\/td><\/tr>
      2<\/td>RE<\/td>Receiver output enable (active low)<\/td><\/tr>
      3<\/td>DE<\/td>Driver output enable (active high)<\/td><\/tr>
      4<\/td>DI<\/td>Driver data input<\/td><\/tr>
      5<\/td>GND<\/td>Ground<\/td><\/tr>
      6<\/td>A<\/td>Non-inverting receiver input \/ driver output<\/td><\/tr>
      7<\/td>B<\/td>Inverting receiver input \/ driver output<\/td><\/tr>
      8<\/td>VCC<\/td>+5V supply<\/td><\/tr><\/table>","application_scenarios":"
      • Industrial Modbus RS-485 network node at 2.5Mbps with fail-safe receiver for open-bus protection<\/li>
      • Building automation BACnet bus transceiver at 115kbps with +\/-1500V ESD for long cable runs<\/li>
      • Multi-drop sensor network with 32 nodes per bus using half-duplex direction control<\/li>
      • Arduino\/ESP32 RS-485 shield with DE\/RE auto-direction control for 2-wire communication<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Key Difference<\/th><\/tr>
        MAX485ESA+T<\/td>ADI<\/td>Extended temp -40C to +85C<\/td><\/tr>
        SN65HVD75DR<\/td>TI<\/td>RS-485, 12Mbps, SOIC-8<\/td><\/tr>
        SP3485EN-L\/TR<\/td>MaxLinear<\/td>RS-485, 3.3V, 10Mbps<\/td><\/tr>
        THVD1500DR<\/td>TI<\/td>RS-485, 5V, 1Mbps, IEC ESD<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/9018","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=9018"}],"version-history":[{"count":1,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/9018\/revisions"}],"predecessor-version":[{"id":9045,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/9018\/revisions\/9045"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=9018"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=9018"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=9018"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=9018"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}