MC9S08AC32MFGE - 8-bit MCU, 32KB Flash, 40MHz, LQFP-44 | NXP
MPN: MC9S08AC32MFGE ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.39 | $7.39 |
| 10 | $7.1 | $71.00 |
| 100 | $6.72 | $672.00 |
| 500 | $6.35 | $3,175.00 |
| 1,000 | $5.98 | $5,980.00 |
MC9S08AC32MFGE Overview
An 8-bit microcontroller is an integrated circuit that executes control and data-processing tasks using an 8-bit-wide CPU data path. Within the embedded-system hierarchy, the MC9S08AC32 belongs to the S08 family of the HCS08 architecture, which sits between simple 8-bit timers/logic and 32-bit application processors. The S08AC family is the third family in NXP (formerly Freescale) Flexis series, and is pin-, peripheral- and tool-compatible with the 32-bit MCF51AC ColdFire V1 devices, giving designers a migration path from 8-bit to 32-bit performance without redesigning the PCB.
Key features include 32KB (32K x 8) Flash program memory with in-application reprogrammability, a 40MHz HCS08 CPU core, 38 general-purpose I/O lines, and operation from a single 2.7V to 5.5V supply that covers both 3.3V and 5V industrial rails. The AC family's shared peripheral set across the AC128/96/60/48/32 variants allows firmware and board reuse across memory-density points.
Architecturally, the HCS08 CPU is an enhanced, fully upward-compatible member of the HC08 family, with a background debug mode (BDM) for non-intrusive flash programming and debugging. The internal bus runs at 20MHz, providing deterministic 8-bit real-time control behavior typical of automotive body and industrial control MCUs.
Typical applications include small home appliances, HVAC blowers, battery chargers, power supplies, industrial sensors, and consumer control panels, where a low-cost 8-bit core with adequate flash and robust I/O drive is required. The 44-LQFP 10x10 mm footprint suits compact two- and four-layer boards.
Design consideration: verify supply voltage selection for the operating frequency point used, since the S08 core frequency derates with supply voltage; use 100nF decoupling on each VDD/VSS pair.
This page adds value beyond the manufacturer datasheet by consolidating distributor pricing, verified drop-in alternatives (including the Flexis-compatible AC96 and PT family variants), and practical design notes in one place.
Drop-in alternatives for MC9S08AC32MFGE — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MC9S08AC32MFGE (same form factor and footprint) — differing in Package, RoHS Status, Core Processor, Flash Memory Size, Supply Voltage.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC9S08AC32CFGE
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →MC9S08AC32CFGER
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S08AC96CFGER
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S08AW32CFGER
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S08PT32AVLD
✅ Drop-In✓ In Stock
$2.05 / Unit
View Datasheet →MC9S08AC32MFGE Maximum Ratings & Electrical Characteristics
| Core Processor | S08 (HCS08) |
| Core Size | 8-Bit |
| Max CPU Clock Speed | 40 MHz |
| Internal Bus Frequency | 20 MHz |
| Flash Memory Size | 32KB (32K x 8) |
| Program Memory Type | FLASH |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Number of I/O | 38 |
| Package | 44-LQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| Series | S08AC (Flexis) |
| Lifecycle Status | ACTIVE |
| RoHS Status | RoHS Compliant |
MC9S08AC32MFGE 44-lqfp (10x10 mm) Pin Configuration Guide
Pin configuration for MC9S08AC32MFGE (44-lqfp (10x10 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for MC9S08AC32MFGE.
Refer to the datasheet for full pin configuration.
Typical Applications
MC9S08AC32MFGE is suitable for 6 applications: Home Appliance Control, HVAC Blower and Fan Control, Battery Chargers and Power Supplies, Industrial Sensors and Transmitters, Consumer Control Panels and Keypads, Automotive Body and Accessory Modules.
Home Appliance Control
The MC9S08AC32MFGE fits appliance control boards such as washing machines, refrigerators, and small kitchen appliances where a low-cost 8-bit MCU with adequate flash and robust I/O is required. Its 32KB Flash holds full application firmware including UI logic, sensor sampling, and actuator control, while 38 GPIO lines drive relays, LEDs, and keys directly. The 2.7V to 5.5V supply range tolerates noisy appliance power with simple regulation. Because the S08AC family is pin-compatible from 32KB to 128KB, a single PCB layout supports feature-tiered product variants by swapping only the MCU ordering code, cutting BOM complexity and firmware maintenance effort across the product line.
Recommended
HVAC Blower and Fan Control
In HVAC blowers and fan modules, the MC9S08AC32MFGE provides deterministic 8-bit real-time control at a 20MHz internal bus frequency, sufficient for closed-loop speed regulation using PWM outputs and tach feedback captured on its I/O. The 40MHz HCS08 core executes the control ISR with predictable latency, and the wide 2.7V to 5.5V supply accommodates industrial 5V rails common in HVAC boards. Its Flexis AC membership means designs can later move to the 32-bit MCF51AC on the same footprint if sensor-fusion or advanced algorithms are added. The 44-LQFP 10x10 mm body fits compact controller PCBs mounted directly on the blower housing.
Recommended
Battery Chargers and Power Supplies
Smart chargers and auxiliary power-supply supervision benefit from the MC9S08AC32MFGE's combination of low cost, flash reprogrammability, and multiple general-purpose I/O. The 32KB Flash stores charging state machines, CC/CV profiles, and fault logs, while the S08 core's deterministic interrupts handle ADC-triggered control loops at kHz rates. Operating down to 2.7V allows direct interfacing with 3.3V telemetry circuitry, and 5.5V tolerance suits chargers powered from 5V USB or industrial supplies. Using the same footprint AC96 variant adds logging capacity for multi-chemistry charger platforms without redesign. The 38 I/O can drive display segments, charge-status LEDs, and relay control in one low-cost package.
Recommended
Industrial Sensors and Transmitters
For 2-wire loop-powered transmitters and industrial sensor heads, the MC9S08AC32MFGE offers an attractive power and integration point. The core operates from a 2.7V minimum supply, leaving headroom for loop-power budgeting, and the S08's low run current keeps total transmitter consumption within 4-20mA loop limits when duty-cycled. Its 32KB Flash stores linearization tables and HART-style communication routines, while multiple I/O support ADC interfacing and switch outputs. The 44-LQFP surface-mount package withstands industrial temperature handling with standard assembly processes. Because S08 development tools are mature and low-cost, sensor platforms built on this MCU are maintainable over long industrial product lifecycles.
Recommended
Consumer Control Panels and Keypads
Control panels with keypads, LEDs, and small displays are a classic S08AC fit: the MC9S08AC32MFGE's 38 GPIO lines scan key matrices and drive indicator arrays directly, eliminating port expanders. The 40MHz CPU / 20MHz bus executes debounce, menu logic, and display refresh without waiting states, and 32KB Flash accommodates multilingual UI strings and OTA-style field-updatable settings. The wide 2.7V to 5.5V supply supports both 3.3V logic LED drivers and 5V legacy panels. Using the pin-compatible AC family ladder (32KB to 128KB), one PCB supports basic and premium panel variants, amortizing tooling and certification costs across the product family.
Recommended
Automotive Body and Accessory Modules
The S08AC architecture originates from Freescale's automotive-oriented S08 lineages, and the MC9S08AC32MFGE is used in automotive accessory functions such as mirror controls, seat-adjust modules, lighting sequencing, and TPMS-adjacent nodes where an 8-bit core suffices. The 40MHz HCS08 core provides headroom for LIN-style communication bit-banging or timer-driven PWM dimming, and the 5V-tolerant 2.7V to 5.5V supply matches automotive 5V internal rails. The 38 I/O drive lamps, relays, and Hall-sensor inputs. Confirm the exact temperature grade of the ordering code against the module's qualification requirements before use, since grade details are encoded in the NXP ordering suffix.
Recommended
Recommended Products Summary
Engineering reference data for MC9S08AC32MFGE — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S08AC32CFGE | MC9S08AC96CFGER | MC9S08AW32CFGER | MC9S08PT32AVLD |
|---|---|---|---|---|---|
| Package | 44-LQFP (10x10 mm) | 44-LQFP (10x10 mm) - same | 44-LQFP (10x10 mm) - same | 44-LQFP - same footprint | 44-LQFP (QFP 44) - same footprint |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core / Clock | S08, 40 MHz CPU / 20 MHz bus | S08, 40 MHz | S08, 40 MHz | S08, 40 MHz | S08, similar clock class |
| Flash Memory | 32 KB | 32 KB | 96 KB | 32 KB | 32 KB |
| Family / Flexis Compatibility | S08AC (Flexis, MCF51AC-compatible) | S08AC (Flexis) | S08AC (Flexis) | S08AW (not Flexis) | S08PT (not Flexis) |
| Pin Compatibility | Reference | Pin-to-pin (FindIC: complete replace) | Pin-to-pin (same AC family) | Verify pinout before substitution | Verify pinout before substitution |
Key Differentiators
- Flexis migration flexibility (vs MC9S08AW32CFGER)
- In-family memory scalability (vs MC9S08PT32AVLD)
- Wide supply range (vs MC9S08AC96CFGER)
Design Notes
Operate the MC9S08AC32MFGE from a well-decoupled 4.5V to 5.5V rail when running at the full 40MHz CPU / 20MHz bus frequency. The 2.7V to 5.5V datasheet range is valid, but the allowed bus frequency derates toward the low end of the supply range, so systems near 3.3V must verify the maximum frequency point in the NXP technical data sheet's supply-versus-frequency graph before finalizing the clock plan. Estimated: decouple each VDD/VSS pair with 100nF ceramic capacitors placed within 3mm of the pins, plus a 10uF bulk capacitor near the regulator.
The 44-LQFP 10x10 mm footprint requires thermal relief only in exceptional cases; place the part with at least 2mm clearance between adjacent fine-pitch ICs for reflow soldering quality. Route analog signals (ADC inputs, comparator references) away from switching loads driving relays or LEDs on the 38 GPIO lines, using the ground plane as a shield. Keep the crystal/resonator traces short and guard them with ground if bus frequency accuracy matters for communication timing. This layout practice carries over unchanged when migrating to AC96 or MCF51AC Flexis variants on the same footprint.
Do not assume cross-family substitution is drop-in: MC9S08AW32CFGER and MC9S08PT32AVLD share 32KB Flash and the 44-pin QFP footprint but belong to different families with different pin multiplexing. Only devices within the S08AC family (AC32/48/60/96/128) are guaranteed pin-, peripheral- and tool-compatible per NXP. Also verify the ordering-code suffix encodes the required temperature grade and package flow (MFGE vs CFGE/CFGER differ in qualification details), and always program the flash security byte to match your production programming workflow.
Compliance Information
Listed as ROHS COMPLIANT in datasheet specification summaries (chipdig/digchip). AEC-Q100 qualification and REACH status not stated in provided data.
