P80C32SBAA,512

Microcontrollers Overview

The NXP P80C32SBAA,512 is a ROMless 8-bit microcontroller based on the 80C51 architecture. It features 256 bytes of RAM and operates within a voltage range of 2.7 V to 5.5 V. The device supports maximum clock frequencies up to 33 MHz at 5 V. It utilizes a Plastic Leaded Chip Carrier (PLCC) package with 44 pins. The component includes four 8-bit I/O ports, three 16-bit counter/timers, and a full-duplex UART. It offers low power consumption with idle and power-down modes.

Microcontrollers Feature Summary

• Static CMOS design allowing operation down to 0 MHz without data loss
• Dual Data Pointers for enhanced memory addressing flexibility
• Six interrupt sources with four priority levels
• Programmable Clock-Out capability via Timer/Counter 2

Microcontrollers Applications

• Industrial control systems requiring static operation
• Battery-powered devices utilizing low power modes
• Embedded applications needing external program memory expansion
• Systems requiring precise timing via programmable clock output

Microcontrollers Procurement Notes

Verify the specific ordering suffix against current NXP documentation to confirm package type and temperature range. Ensure compatibility with existing PCB footprints for the PLCC-44 configuration. Confirm that the ROMless nature of the device aligns with the system's external memory requirements. Check for any end-of-life notices or recommended replacements if long-term supply is required.

Microcontrollers Selection Notes

Select this component when an 80C51-compatible core is needed without onboard program memory. It is suitable for designs where code storage is handled by external EPROM or Flash. Consider the 33 MHz speed rating for high-performance timing tasks. Evaluate the 256-byte RAM capacity against application stack and variable requirements.

Microcontrollers Part Context

This part belongs to the Philips/NXP 80C31/80C32 family of high-performance static 80C51 microcontrollers. The 'SBAA' designation indicates a 16 MHz frequency range in a PLCC package with commercial temperature limits, although the broader 80C32 series supports up to 33 MHz. It is a legacy component often used in established industrial and consumer electronics designs.

Microcontrollers Replacement Considerations

Direct substitutes include other variants from the 80C32 series such as P80C32UBAA for higher speed operations. Cross-family migration may require significant software and hardware redesign due to architectural differences.