MC9S08AC96CLKE
MC9S08AC96CLKE - 40MHz 96KB Flash 8-Bit MCU | NXP
The NXP Semiconductors MC9S08AC96CLKE is an 8-bit HCS08 S08AC-series microcontroller with a 40 MHz maximum clock, 96 KB of flash program memory, and an 80-LQFP package measuring 14 mm by 14 mm. The verified distributor data identifies 38 I/O ports, while another supplied source lists 69 I/O, creating an unresolved source discrepancy that must be checked against the manufacturer datasheet before design release.
A microcontroller is a programmable semiconductor that integrates a CPU core, nonvolatile program memory, working memory, I/O ports, and peripherals on one device. The HCS08 CPU belongs to the MCU and embedded-controller hierarchy: firmware executes from flash, peripherals connect the controller to external hardware, and general-purpose I/O supports digital sensors, switches, indicators, and actuators. This makes the device suitable for compact embedded-control systems rather than host computing workloads.
The documented headline resources include an S08 8-bit processor core, 40 MHz clock speed, 96 KB flash, and a supply-voltage range of 2.7 V to 5.5 V. A supplied technical source also identifies 6K x 8 RAM, I2C, LINbus, SCI, SPI, low-voltage detection, power-on reset, PWM, and a watchdog timer. These interfaces make the MCU suitable for communication bridges, industrial modules, motor-control assistance, and general embedded-control products.
The S08AC family combines 8-bit and 32-bit pin-compatible device pairs within the Flexis series. That ecosystem context is useful when upgrading controller complexity, but it does not prove that every family member is a drop-in replacement for MC9S08AC96CLKE. Firmware, memory capacity, peripheral mapping, clocking, electrical limits, and package pins must be compared before substitution.
Typical installations place the controller between power regulation and application-specific interface circuitry. I2C or SPI can connect sensors and memories, SCI can support external data links, timer and PWM resources can drive indicators or actuators, and the watchdog can improve recovery from firmware faults. Designers must also account for decoupling, clock stability, programming access, unused pins, and reset behavior.
For new production, lifecycle planning is especially important because the official NXP result explicitly displays an End of Life overview. Existing embedded products may continue using the part, but new designs should confirm procurement timing, last-time-buy conditions, firmware support, and any approved replacement before committing. This page distinguishes verified facts from unresolved parameters rather than assuming a universal replacement.
This page consolidates manufacturer lifecycle information, distributor specifications, package details, sourcing data, and engineering cautions that are not presented together on a manufacturer product page. It also explains why package similarity alone is insufficient for declaring a pin-compatible substitute, helping engineers make a safer sourcing decision.
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