MC9S08AC16CFGE
Overview
The MC9S08AC16CFGE is part of NXP's HCS08 family of 8-bit microcontrollers, offering a balance of performance and cost-effectiveness for embedded systems. It integrates a 20MHz HCS08 CPU core with 16KB of flash program memory and 1KB RAM, suitable for applications requiring moderate processing power. The device includes essential peripherals such as timers, analog comparators, and serial communication interfaces (SCI, SPI, I²C). Its compact 48-pin LQFP package makes it suitable for space-constrained designs while maintaining robust I/O capabilities.
Structure and Working Principle
The microcontroller operates on a modified von Neumann architecture with a single bus for data and instructions. The HCS08 core executes most instructions in 1-4 clock cycles, achieving up to 10 MIPS at 20MHz. The on-chip flash supports in-circuit programming for field updates. Power management features include three low-power modes (stop, wait, and pseudo-stop) that reduce current consumption to microampere levels when idle. The integrated clock generator allows operation from external crystals or internal oscillators, simplifying board design.
Key Features
A standout feature is the microcontroller's robust EMC performance, meeting automotive-grade requirements for noise immunity. The 16-channel 10-bit ADC supports precise analog measurements, while the programmable interrupt controller handles up to 32 sources for responsive event handling. Debugging is facilitated through background debug mode (BDM) interface, allowing non-intrusive system inspection. The flash memory offers 100,000 write/erase cycles with 15-year data retention, ensuring long-term reliability for industrial applications.
Application Areas
Primary applications include automotive body electronics (e.g., seat control, lighting modules), home appliances (washing machine controllers), and industrial sensors. Its -40°C to +125°C operating range suits harsh environments. In consumer electronics, the MC9S08AC16CFGE powers devices like remote controls and smart plugs where cost-sensitive 8-bit processing suffices. Medical devices leverage its deterministic response for basic monitoring equipment where higher-end MCUs would be overqualified.
Maintenance and Precautions
For reliable operation, design circuits to maintain VDD within 1.8V-3.6V range and implement proper decoupling (typically 0.1μF ceramic capacitor per power pin). Thermal management is rarely needed given the 300mW maximum power dissipation. During PCB assembly, follow JEDEC J-STD-020 guidelines for reflow profiles. The device is not rated for lead-free wave soldering. Long-term storage should maintain humidity below 60% with moisture-sensitive packaging (MSL 3 rating).
B2B Procurement Guide
Industrial buyers should verify availability of alternative part numbers (MC9S08AC16CFJE for lead-free option) and consider minimum order quantities (typically 1,000 units for best pricing). NXP authorized distributors provide full traceability. Evaluate third-party toolchain support (e.g., CodeWarrior, IAR Embedded Workbench) as these impact development costs. For prototyping, request samples through NXP's sample program or purchase development kits like the DEMO9S08AC16.
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