{"id":9806,"date":"2026-07-06T10:51:34","date_gmt":"2026-07-06T10:51:34","guid":{"rendered":"https:\/\/materialparts.com\/cmx865ae4\/"},"modified":"2026-07-06T10:51:34","modified_gmt":"2026-07-06T10:51:34","slug":"cmx865ae4","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/cmx865ae4\/","title":{"rendered":"CMX865AE4"},"content":{"rendered":"<h2>\u4ea7\u54c1\u6982\u89c8<\/h2>\n<p>The CMX865AE4 from CML Microcircuits is a low-power modem IC for V.22bis\/V.22\/V.21\/V.23 Bell 212A modem applications. It integrates a DSP modem engine, DAA (Data Access Arrangement), and telephone line interface in a single package, supporting data rates up to 2400bps.<\/p>\n<h2>\u4e3b\u8981\u89c4\u683c<\/h2>\n<ul>\n<li>Type: Low-Power Modem IC<\/li>\n<li>Manufacturer: CML Microcircuits<\/li>\n<li>Standards: V.22bis, V.22, V.21, V.23, Bell 212A<\/li>\n<li>Data Rate: Up to 2400bps (V.22bis)<\/li>\n<li>Interface: SPI \/ UART<\/li>\n<li>Supply Voltage: 3.0V to 3.6V<\/li>\n<li>Power: Low power CMOS<\/li>\n<li>Package: 24-TSSOP<\/li>\n<li>Operating Temp: -40C to +85C<\/li>\n<li>RoHS: Compliant<\/li>\n<\/ul>\n<h2>\u7279\u70b9<\/h2>\n<ul>\n<li>Full modem functionality in a single IC<\/li>\n<li>Low power CMOS technology<\/li>\n<li>Integrated DSP eliminates external processing<\/li>\n<li>Supports V.22bis\/V.22\/V.21\/V.23 and Bell 212A<\/li>\n<li>SPI control interface for easy MCU integration<\/li>\n<\/ul>\n<h2>\u5e94\u7528<\/h2>\n<ul>\n<li>Smart meters (AMR\/AMI)<\/li>\n<li>Point-of-sale terminals<\/li>\n<li>Security and alarm systems<\/li>\n<li>Industrial telemetry<\/li>\n<li>Remote monitoring systems<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Product Overview The CMX865AE4 from CML Microcircuits is a low-power modem IC for V.22bis\/V.22\/V.21\/V.23 Bell 212A modem applications. It integrates a DSP modem engine, DAA (Data Access Arrangement), and telephone line interface in a single package, supporting data rates up to 2400bps. Key Specifications Type: Low-Power Modem IC Manufacturer: CML Microcircuits Standards: V.22bis, V.22, V.21, [&hellip;]<\/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":[1085],"chip_brand":[1084],"class_list":["post-9806","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","tag-cmx865ae4","chip_brand-cml"],"acf":{"brief_explanation":"Low-power V.22bis modem IC, 2400bps, SPI control, 24-TSSOP, CML Micro","date_code":"","package_case":"24-TSSOP (4.4 x 7.8 x 1.0mm)","in_stock":14159,"datasheet":"https:\/\/www.cmlmicro.com\/products\/modem\/cmx865\/","price":"$5.50 @ 1ku","product_introduction":"The CMX865AE4 from CML Microcircuits is a low-power V.22bis modem IC supporting data rates up to 2400bps with integrated DSP, SPI control interface, and 24-TSSOP package for smart meter and telemetry applications.","working_principle":"The CMX865 implements modem transmit and receive functions using an integrated DSP core. On the transmit side, digital data is modulated according to the selected standard (e.g., QAM for V.22bis, DPSK for V.22) and converted to analog by an internal DAC. On the receive side, the analog line signal is digitized by an ADC and processed by the DSP for demodulation, equalization, and error correction. The SPI interface allows the host MCU to configure modem parameters and read\/write data.","pin_description":"<table><tr><th>Pin<\/th><th>Name<\/th><th>Function<\/th><\/tr><tr><td>1<\/td><td>VDD<\/td><td>Power supply (3.0-3.6V)<\/td><\/tr><tr><td>2<\/td><td>GND<\/td><td>Ground<\/td><\/tr><tr><td>3-4<\/td><td>XTAL<\/td><td>Crystal oscillator<\/td><\/tr><tr><td>5<\/td><td>SDA<\/td><td>SPI data input<\/td><\/tr><tr><td>6<\/td><td>SCLK<\/td><td>SPI clock<\/td><\/tr><tr><td>7<\/td><td>CS<\/td><td>Chip select<\/td><\/tr><tr><td>8<\/td><td>IRQ<\/td><td>Interrupt output<\/td><\/tr><tr><td>9<\/td><td>TXA<\/td><td>Transmit analog output<\/td><\/tr><tr><td>10<\/td><td>RXA<\/td><td>Receive analog input<\/td><\/tr><tr><td>11-24<\/td><td>Misc<\/td><td>Control, DAA, and status pins<\/td><\/tr><\/table>","application_scenarios":"<ul><li>Smart meters (AMR\/AMI)<\/li><li>Point-of-sale terminals<\/li><li>Security and alarm systems<\/li><li>Industrial telemetry<\/li><\/ul>","alternative_models":"<table><tr><th>Model<\/th><th>Manufacturer<\/th><th>Key Spec<\/th><th>Package<\/th><\/tr><tr><td>CMX868<\/td><td>CML Micro<\/td><td>V.92 modem IC<\/td><td>TSSOP-24<\/td><\/tr><tr><td>Si2401<\/td><td>Silicon Labs<\/td><td>V.22bis modem<\/td><td>QFN-28<\/td><\/tr><tr><td>TLC5601-REB<\/td><td>MaxLine<\/td><td>V.23 modem<\/td><td>SSOP-20<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/9806","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=9806"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/9806\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=9806"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=9806"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=9806"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=9806"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}