AT87F51-24PI

Microcontrollers Overview

The AT87F51 is an 8-bit microcontroller compatible with the MCS-51 instruction set and pinout. It features 4K bytes of QuickFlash memory, 128 bytes of internal RAM, and 32 programmable I/O lines. The device supports fully static operation from 0 Hz to 24 MHz and includes two 16-bit timer/counters, six interrupt sources, and a full-duplex serial channel. It operates on a 5V supply and offers low-power Idle and Power Down modes.

Microcontrollers Feature Summary

• Compatible with industry standard MCS-51 instruction set and pinout
• On-chip QuickFlash allows user programming via conventional nonvolatile memory programmers
• Three-level program memory lock for code protection
• Supports software selectable power saving modes including Idle and Power Down

Microcontrollers Applications

• Embedded control applications requiring high flexibility and cost effectiveness
• Systems utilizing external program or data memory expansion
• Applications needing byte-by-byte reprogrammable flash memory

Microcontrollers Procurement Notes

Verify package type availability as the datasheet lists PDIP, PLCC, and TQFP options. Confirm operating temperature range requirements against commercial (0°C to 70°C) and industrial (-40°C to 85°C) variants. Note that this component is marked Not Recommended for New Designs; verify if a modern replacement like the AT89S51 is preferred for new projects.

Microcontrollers Selection Notes

Select based on required clock speed (12, 16, 20, or 24 MHz) and package preference. Ensure the design accommodates the 5V ± 20% supply voltage requirement. Consider the need for external pull-ups on Port 0 if used as an address/data bus. Verify that the three-level lock bit security meets project requirements.

Microcontrollers Part Context

Manufactured by Atmel using high-density nonvolatile memory technology, the AT87F51 combines an 8-bit CPU with QuickFlash on a single chip. It provides a versatile solution for embedded control, offering the benefits of Flash memory with the established architecture of the MCS-51 family.

Microcontrollers Replacement Considerations

The datasheet explicitly recommends using the AT89S51 instead of the AT87F51 for new designs due to the latter being Not Recommended for New Designs.