{"id":8358,"date":"2026-06-28T12:42:55","date_gmt":"2026-06-28T12:42:55","guid":{"rendered":"https:\/\/materialparts.com\/at89c51rd2-rltum\/"},"modified":"2026-06-28T12:42:55","modified_gmt":"2026-06-28T12:42:55","slug":"at89c51rd2-rltum","status":"publish","type":"post","link":"https:\/\/materialparts.com\/es\/at89c51rd2-rltum\/","title":{"rendered":"AT89C51RD2-RLTUM"},"content":{"rendered":"

Productos<\/h2>\n

The AT89C51RD2-RLTUM from Microchip Technology is an 80C51-compatible 8-bit microcontroller with 64 KB ISP Flash, 1792 bytes XRAM, and SPI interface in a 44-pin VQFP package. Running at up to 60 MHz, it offers in-system programming, X2 speed mode, and a programmable counter array for versatile embedded control.<\/p>\n

Especificaciones<\/h2>\n\n\n\n\n\n\n\n\n\n
N\u00facleo<\/td>\n80C51 @ 60 MHz<\/td>\n<\/tr>\n
Flash Memory<\/td>\n64 KB (ISP capable)<\/td>\n<\/tr>\n
SRAM<\/td>\n256 bytes + 1792 bytes XRAM<\/td>\n<\/tr>\n
Operating Voltage<\/td>\n2.7 V to 5.5 V<\/td>\n<\/tr>\n
Temporizadores<\/td>\n3 x 16-bit + PCA<\/td>\n<\/tr>\n
Comunicaci\u00f3n<\/td>\nUART, SPI<\/td>\n<\/tr>\n
I\/O Pins<\/td>\n34<\/td>\n<\/tr>\n
Paquete<\/td>\n44-VQFP (10 x 10 mm)<\/td>\n<\/tr>\n<\/table>\n

Caracter\u00edsticas<\/h2>\n
    \n
  • 80C51 core compatible with industry-standard instruction set<\/li>\n
  • 64 KB Flash with in-system and in-application programming<\/li>\n
  • 1792 bytes of extended RAM (XRAM) for data buffering<\/li>\n
  • X2 Mode doubles throughput at same crystal frequency<\/li>\n
  • Programmable Counter Array (PCA) for PWM and capture<\/li>\n
  • Hardware watchdog timer and dual data pointers<\/li>\n<\/ul>\n

    Aplicaciones<\/h2>\n
      \n
    • Control industrial y automatizaci\u00f3n<\/li>\n
    • Consumer electronics and appliances<\/li>\n
    • Automotive body electronics<\/li>\n
    • Communication adapters and protocol converters<\/li>\n
    • Embedded instrumentation and data logging<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The AT89C51RD2-RLTUM from Microchip Technology is an 80C51-compatible 8-bit microcontroller with 64 KB ISP Flash, 1792 bytes XRAM, and SPI interface in a 44-pin VQFP package. Running at up to 60 MHz, it offers in-system programming, X2 speed mode, and a programmable counter array for versatile embedded control. Key Specifications Core 80C51 @ […]<\/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":[13,25],"tags":[],"chip_brand":[134],"class_list":["post-8358","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-microcontrollers-mcu","chip_brand-microchip"],"acf":{"brief_explanation":"80C51 8-bit MCU, 60MHz, 64KB ISP Flash, 1792B XRAM, SPI, 44-VQFP","date_code":"","package_case":"VQFP-44 (10.00 x 10.00 x 1.20 mm)","in_stock":8280,"datasheet":"https:\/\/ww1.microchip.com\/downloads\/en\/devicedoc\/doc5704.pdf","price":"$4.20 @ 1ku","product_introduction":"The AT89C51RD2-RLTUM is a high-performance 80C51-compatible 8-bit microcontroller from Microchip Technology featuring 64 KB of in-system programmable Flash memory and 1792 bytes of extended RAM in a compact 44-pin VQFP package. The device extends the standard 80C52 architecture with a Programmable Counter Array (PCA) for flexible PWM generation and input capture, a hardware watchdog timer, dual data pointers for faster memory operations, and an SPI interface for serial peripheral communication. The X2 speed mode doubles the CPU throughput at a given crystal frequency by reducing each machine cycle from 12 to 6 oscillator periods, enabling up to 60 MHz equivalent performance from a 30 MHz crystal. The Flash memory supports both in-system programming (ISP) and in-application programming (IAP), allowing firmware updates without removing the device from the board.","working_principle":"The AT89C51RD2 executes the industry-standard 80C51 instruction set with an 8-bit CPU core and 256 bytes of internal RAM. In standard mode, each machine cycle requires 12 oscillator periods, while the X2 mode reduces this to 6 periods, effectively doubling throughput. The 64 KB Flash is organized as a unified code\/data space and supports byte-level and page-level programming. The ISP feature uses a built-in bootloader that communicates via UART to receive programming commands and data, enabling field firmware updates. The PCA module provides five capture\/compare modules, each configurable for 16-bit capture, 16-bit software timer, high-speed output, or 8-bit PWM mode. The SPI interface operates in master or slave mode at up to half the oscillator frequency. Dual DPTR registers allow faster block data moves between memory regions.","pin_description":"
      Pin Group<\/th>Count<\/th>Function<\/th><\/tr>
      VDD\/VSS<\/td>4<\/td>Power supply and ground<\/td><\/tr>
      PORT0 (P0.0-P0.7)<\/td>8<\/td>Open-drain I\/O, multiplexed address\/data bus<\/td><\/tr>
      PORT1 (P1.0-P1.7)<\/td>8<\/td>PCA I\/O, SPI pins, general I\/O<\/td><\/tr>
      PORT2 (P2.0-P2.7)<\/td>8<\/td>Address bus high byte, general I\/O<\/td><\/tr>
      PORT3 (P3.0-P3.7)<\/td>8<\/td>UART RX\/TX, timer I\/O, INT0\/INT1, WR\/RD<\/td><\/tr>
      EA\/VPP<\/td>1<\/td>External access enable \/ programming voltage<\/td><\/tr>
      PSEN<\/td>1<\/td>Program store enable output<\/td><\/tr>
      ALE\/PROG<\/td>1<\/td>Address latch enable \/ programming pulse<\/td><\/tr>
      RST<\/td>1<\/td>Reset input<\/td><\/tr>
      XTAL1\/XTAL2<\/td>2<\/td>Crystal oscillator connections<\/td><\/tr><\/table>","application_scenarios":"
      • Industrial Protocol Conversion<\/strong>: Serial protocol bridging between UART, SPI, and parallel bus systems<\/li>
      • Motor Speed Control<\/strong>: PCA-based PWM generation for brushed DC motor drives<\/li>
      • Consumer Appliance Control<\/strong>: Washing machine and dishwasher controller with timer and UART communication<\/li>
      • Field-Updatable Devices<\/strong>: ISP-capable firmware updates for remote-installed equipment<\/li>
      • Data Acquisition<\/strong>: Multi-channel analog sensor reading with SPI ADC and UART host communication<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Flash<\/th>RAM<\/th>Speed<\/th>Package<\/th>Notes<\/th><\/tr>
        AT89C51ED2-RLTUM<\/td>Microchip<\/td>64 KB<\/td>2048 B<\/td>60 MHz<\/td>VQFP-44<\/td>More XRAM, EEPROM<\/td><\/tr>
        PIC18F4520-I\/PT<\/td>Microchip<\/td>32 KB<\/td>1536 B<\/td>40 MHz<\/td>TQFP-44<\/td>PIC18 alternative<\/td><\/tr>
        AT89S52-24AU<\/td>Microchip<\/td>8 KB<\/td>256 B<\/td>33 MHz<\/td>TQFP-44<\/td>Smaller Flash, simpler<\/td><\/tr>
        C8051F340-GQ<\/td>Silicon Labs<\/td>64 KB<\/td>4352 B<\/td>48 MHz<\/td>TQFP-48<\/td>8051 with USB<\/td><\/tr>
        STC89C52RC<\/td>STC<\/td>8 KB<\/td>512 B<\/td>35 MHz<\/td>LQFP-44<\/td>Cost-effective 8051<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/8358","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/comments?post=8358"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/8358\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/media?parent=8358"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/categories?post=8358"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/tags?post=8358"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/chip_brand?post=8358"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}