AT87C51RC2-SLSUM

Microcontrollers Overview

The AT87C51RC2-SLSUM is an 8-bit microcontroller based on the 80C52 architecture, manufactured by Microchip Technology. It features 32 Kbytes of on-chip EPROM and 256 bytes of expanded RAM (XRAM). The device supports a maximum clock frequency of 40 MHz at 5V and 30 MHz at 3V, with an optional X2 speed improvement mode that doubles performance. It includes three 16-bit timer/counters, a Programmable Counter Array (PCA), a hardware watchdog timer, and an enhanced UART. The component operates within a voltage range of 2.7V to 5.5V and is available in industrial temperature ranges (-40°C to 85°C) using VQFP44 or PLCC44 packages.

Microcontrollers Feature Summary

• High-speed architecture supporting up to 40 MHz operation with X2 mode capability for doubled CPU throughput.
• Integrated 32 Kbytes of EPROM and 256 bytes of expanded RAM for data handling.
• Programmable Counter Array providing high-speed output, capture/compare, PWM, and watchdog functions.
• Enhanced UART with framing error detection and automatic address recognition for multiprocessor communication.

Microcontrollers Applications

• Industrial control systems requiring robust interrupt handling and extended memory.
• Embedded applications utilizing PCA for precise timing and pulse width modulation.
• Multiprocessor communication networks leveraging the enhanced UART capabilities.

Microcontrollers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and temperature grade. Ensure compatibility with existing board layouts for VQFP44 or PLCC44 footprints. Confirm that the EPROM version meets the application's need for field-upgradable code storage compared to ROM or OTP variants.

Microcontrollers Selection Notes

Select this component when 32 Kbytes of programmable memory and 256 bytes of internal XRAM are required. The X2 mode is suitable for applications needing higher processing speeds without increasing crystal frequency. Verify that the 2.7V to 5.5V supply range aligns with the system power design and that the industrial temperature rating is necessary for the operating environment.

Microcontrollers Part Context

This part belongs to the AT/TS8xC51Rx2 family, which extends the standard 80C51 architecture with additional features like dual data pointers and expanded memory options. It is compatible with the 80C52 instruction set and pinout, facilitating migration from legacy designs while offering enhanced peripheral integration such as the PCA and Timer 2 enhancements.

Microcontrollers Replacement Considerations

Direct substitutes include other members of the TS8xC51Rx2 family with matching memory configurations, such as the TS87C51RB2 or TS87C51RD2, depending on the required RAM size. Cross-vendor equivalents must be verified for pin compatibility and instruction set adherence.