MC9S08AC32CFJE
MC9S08AC32CFJE - 40MHz 32KB 8-Bit MCU | NXP | LQFP-32
NXP Semiconductors MC9S08AC32CFJE is an 8-bit HCS08 microcontroller operating at up to 40 MHz, with 32 KB of Flash memory, 16-bit timer resources, and SCI/SPI interfaces in a 32-LQFP 7 mm × 7 mm package. Its core role is compact embedded control: execute firmware, scan inputs, operate timers, and communicate through serial peripherals while fitting cost-sensitive industrial or consumer electronics designs.
A microcontroller is a semiconductor device that integrates a CPU core, program memory, data memory, I/O, timers, and communication interfaces on one package. The MC9S08AC32CFJE belongs to the S08AC family and the broader 8-bit embedded-controller hierarchy, combining real-time control with more peripheral capability than a basic logic device. The supplied distributor information identifies 32 KB Flash, 8 KB RAM, a 40 MHz clock, a 2.7 V to 5.5 V supply range, and SCI/SPI connectivity.
Key features include a 40 MHz HCS08 CPU, 32 KB Flash for firmware storage, and 8 KB RAM for working data. The 16-bit timer capability supports periodic and timing-sensitive control functions, while SCI and SPI interfaces allow connection to sensors, actuators, displays, and external communications hardware. A 32-LQFP package provides a defined PCB footprint with accessible peripheral leads for compact mixed-signal and embedded-control boards.
The S08 architecture uses an 8-bit instruction-oriented embedded platform and an internal bus frequency identified in the supplied comparison data as 20 MHz. At the system level, the MC9S08AC32CFJE provides a practical bridge between low-cost MCU control and external hardware. Firmware can use timers for periodic control, SCI for serial device communication, and SPI for higher-speed peripheral connections, subject to the detailed electrical and pin-level limits in the manufacturer datasheet.
Typical applications include industrial control panels, sensor interfaces, motor-control front ends, consumer appliances, instrumentation, communication modules, and compact embedded systems. The 32-LQFP package is useful when a design needs more accessible I/O than a very small leadless package while retaining a moderate board footprint. The device should be selected only after checking its complete pinout, electrical limits, memory map, peripheral availability, and lifecycle notices.
For design implementation, preserve the recommended power and decoupling arrangement, confirm every exposed connection, and account for signal-level compatibility on SCI and SPI. Do not assume that a competitor with the same nominal pin count is interchangeable: package drawing, pin functions, clock requirements, memory organization, and peripheral behavior must match. Validate the complete operating temperature range and supply tolerances against the manufacturer datasheet before production.
This page consolidates the verified NXP product identity, distributor specifications, package information, lifecycle indication, and practical design context. It also distinguishes verified source data from unavailable details so engineers can locate the authoritative datasheet, confirm pinout information, and validate a replacement before committing a PCB or production build.
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