MC68HC705L32FU

Microcontrollers Overview

The MC68HC705L32FU is an 8-bit microcontroller unit belonging to the M68HC05 family, manufactured by Freescale Semiconductor. It features a 4 MHz clock frequency and utilizes a PQFP-64 package. The device integrates 32 KB of One-Time Programmable Read-Only Memory (OTPROM) for program storage, 528 bytes of static RAM, and 256 bytes of EEPROM. Key peripherals include a 15-stage multifunction timer, a Computer Operating Properly (COP) watchdog, and serial communication interfaces such as SCI and SPI. It supports up to 24 bidirectional I/O lines with configurable sink capabilities and interrupt options.

Microcontrollers Feature Summary

• Integrates 32 KB OTPROM, 528 bytes RAM, and 256 bytes EEPROM for flexible data and code management
• Includes a 15-stage multifunction timer and COP watchdog for system timing and reliability
• Supports multiple oscillator configurations including crystal, ceramic resonator, RC, and external clock
• Features programmable I/O pins with selectable interrupt sensitivity and keyboard scan functionality

Microcontrollers Applications

• Industrial control systems requiring robust watchdog and timer functions
• Consumer electronics utilizing serial communication protocols
• Embedded applications needing non-volatile memory for configuration storage
• Cost-sensitive designs leveraging the M68HC05 architecture

Microcontrollers Procurement Notes

Verify the specific suffix 'L32' against official Freescale or NXP documentation to confirm pinout and memory configuration compatibility. Ensure the PQFP-64 package dimensions match your PCB footprint requirements. Check for RoHS compliance status in the latest datasheet revision. Confirm that the OTPROM programming voltage and procedures align with your manufacturing equipment specifications before procurement.

Microcontrollers Selection Notes

Select this component when a design requires substantial program memory within the 8-bit HC05 ecosystem. The inclusion of both EEPROM and OTPROM allows for runtime data storage alongside permanent code. Consider the 24 available I/O lines and peripheral set if interface complexity exceeds basic logic operations. Evaluate the 4 MHz operating speed against real-time processing demands. Compare against other HC705 variants if lower memory density or different packaging is sufficient for the application.

Microcontrollers Part Context

This part belongs to the M68HC05 family, a widely used line of 8-bit microcontrollers known for their low cost and high performance. The HC705 variant specifically targets applications requiring integrated analog-to-digital conversion and enhanced peripheral sets compared to earlier HC05 models. The L32 designation typically indicates the 32 KB memory configuration within this series.

Microcontrollers Replacement Considerations

Direct substitutes may include other members of the MC68HC705 family with equivalent memory sizes, such as the MC68HC705X32 series. Verify pin compatibility and peripheral availability when considering cross-references from other manufacturers using the HC05 core.