MC9S08MM32ACLH - 8-bit S08 MCU, 32KB Flash, 48MHz | NXP
MPN: MC9S08MM32ACLH ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.03 | $5.03 |
| 10 | $4.78 | $47.80 |
| 100 | $4.53 | $453.00 |
| 500 | $4.28 | $2,140.00 |
| 1,000 | $4.03 | $4,030.00 |
MC9S08MM32ACLH Overview
A microcontroller (MCU) is a single-chip computer that integrates a processor core, program memory, data memory, and peripherals such as timers, communication interfaces, and analog blocks onto one die. In the product hierarchy, the MC9S08MM32ACLH belongs to the 8-bit microcontroller class, the S08 family, and general-purpose embedded control ICs, sitting below 32-bit MCUs in complexity but excelling in cost-sensitive, low-power control tasks.
Key features include the wide 1.8V to 3.6V supply voltage range, 33 general-purpose I/O lines, RoHS-compliant lead-free packaging, and an operating temperature rating up to 105C ambient, which together support automotive-adjacent and industrial environments. The voltage-dependent clock scaling lets designers trade speed against power consumption dynamically, a distinct advantage for battery-powered designs.
Architecturally, the S08 core is an enhanced, fully static CISC 8-bit engine descended from the Freescale (now NXP) 68HC08 lineage, offering efficient instruction execution, low-interrupt latency, and mature development tools including CodeWarrior support. The 32KB flash array supports in-system reprogramming, enabling field firmware updates without socketed parts.
Typical applications include consumer appliance control, small motor and lighting control, battery management and portable instrumentation, and industrial sensing nodes where an 8-bit MCU with rich flash and many I/O pins is sufficient.
When designing with this device, verify that your target clock frequency matches the operating supply voltage per the voltage-versus-frequency derating (48MHz only above the upper voltage range) to avoid marginal timing.
This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet, with data verified as of 2026-10-18.
Drop-in alternatives for MC9S08MM32ACLH — 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 MC9S08MM32ACLH (same form factor and footprint) — differing in Package, RoHS Status, Core, Flash Memory, Maximum Clock Frequency.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC9S08MM64ACLH
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MC9S08MM128ACLH
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MC9S08JE64CLH
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S08JE64VLH
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S08DN32MLH
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S08MM32ACLH Maximum Ratings & Electrical Characteristics
| Core Processor | S08 (8-bit CISC) |
| Core Size | 8-Bit |
| Maximum Clock Frequency | 48 MHz (at high VDD); 40 MHz above 2.1 V; 20 MHz above 1.8 V |
| Flash Memory | 32KB (32K x 8) |
| Supply Voltage Range | 1.8 V to 3.6 V |
| Number of I/O | 33 |
| Package Type | 64-LQFP (10 x 10 mm) |
| Mounting Type | Surface Mount |
| Program Memory Type | Flash |
| Life Cycle Stage | Active |
| RoHS Status | RoHS Compliant |
| USB | No (per Mouser listing: 8-bit MCU, no USB) |
| Packaging | Tray |
| Supply Voltage - Nominal | 2.5 V / 3.3 V |
MC9S08MM32ACLH 64-lqfp (10 x 10 mm) Pin Configuration Guide
Pin configuration for MC9S08MM32ACLH (64-lqfp (10 x 10 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 MC9S08MM32ACLH.
Refer to the datasheet for full pin configuration.
Typical Applications
MC9S08MM32ACLH is suitable for 6 applications: Home Appliance Control, Small Motor Control, Battery-Powered Portable Instruments, Industrial Sensor Nodes, LED Lighting Control, Data Acquisition Subsystems.
Home Appliance Control
The MC9S08MM32ACLH fits appliance control boards - washing machines, rice cookers, and small HVAC controllers - because its 33 I/O lines drive displays, relays, and keypads directly while the 32KB flash holds complete control firmware including UI state machines and fault logging. The 1.8V to 3.6V supply tolerance simplifies power design from linear or buck-derived 3.3V rails, and operation to 105C ambient covers the hot interior of cooking and laundry appliances. Designers typically clock the S08 core at 20-40MHz depending on the rail, balancing scan rate against EMC. The absence of USB keeps cost down, which matters in high-volume appliance BOMs.
Recommended
Small Motor Control
For fan, pump, and small BLDC/DC motor control, the MC9S08MM32ACLH provides the S08 core's fast interrupt response for commutation timing, ample flash for PI speed-loop firmware, and enough GPIO for gate-drive control, Hall/encoder inputs, and fault feedback. The voltage-scaled clock (48MHz at high rail, 40MHz above 2.1V) gives headroom for tight current-loop periods, while the 64-pin LQFP 10 x 10 mm footprint keeps the controller compact on power boards. The 105C capability suits motor-controller enclosures where ambient temperature rises above room conditions. Pair with external gate drivers and current-sense circuitry; the MCU supervises sequencing and protection.
Recommended
Battery-Powered Portable Instruments
Portable meters and loggers benefit from the MC9S08MM32ACLH's 1.8V floor: the device still executes at 20MHz from two alkaline cells or a single Li cell with an LDO, extending usable battery discharge curves. The 32KB flash accommodates data-logging tables, calibration coefficients, and communication firmware, while the 33 I/O lines interface LCD segments, buttons, and serial peripherals. The wide supply range removes the need for tight regulation during battery sag, a common failure point in portable designs. Firmware should exploit low-power wait/stop modes between samples to stretch battery life; verify exact stop-mode currents in the NXP datasheet.
Recommended
Industrial Sensor Nodes
In factory sensing nodes measuring temperature, pressure, or flow, the MC9S08MM32ACLH handles signal-chain sequencing, linearization, and digital output (UART/SPI/I2C-class links via its peripheral set - confirm exact interface inventory in the datasheet). The 32KB flash supports protocol stacks and node-identity storage; the 105C operation tolerates panel-mount electronics near heat sources. Its RoHS-compliant 64-LQFP meets industrial environmental requirements, and the mature S08 toolchain eases maintenance of long-lived factory equipment. Powering from a 3.3V industrial rail leaves margin below the 3.6V absolute limit; add transient protection on field-wired I/O.
Recommended
LED Lighting Control
Dimmable LED drivers and smart-lamp controllers use the MC9S08MM32ACLH to generate PWM dimming, decode DALI/TRIAC/0-10V-style inputs, and manage thermal foldback. The 48MHz capability supports precise PWM resolution at audible-noise-free frequencies above 20kHz, while 33 I/O lines handle multi-string enable, fault sensing, and communication. The 1.8-3.6V operating range matches standard 3.3V auxiliary supplies derived from offline converters. The 32KB flash leaves room for lighting-profile tables and upgrade firmware. At high ambient inside enclosed luminaires, the 105C rating provides margin; monitor junction temperature via the internal sensor if available per the datasheet peripheral list.
Recommended
Data Acquisition Subsystems
As a controller for front-end data acquisition boards, the MC9S08MM32ACLH sequences external ADCs, manages gain/mux control lines, buffers sample streams, and formats output over serial links. Its S08 core's deterministic CISC timing simplifies sample-interval scheduling without an RTOS, and 32KB flash stores calibration and framing logic. The many GPIO of the 64-LQFP directly drive multiplexer address lines and status LEDs. Because the MCU itself lacks high-speed conversion, pair it with precision ADCs from the same design ecosystem; SPI-class interconnect keeps layout simple. Clock the device conservatively near ADC sampling rates to minimize digital noise coupling into analog sections.
Recommended
Recommended Products Summary
Engineering reference data for MC9S08MM32ACLH — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S08MM64ACLH | MC9S08MM128ACLH | MC9S08JE64CLH | MC9S08DN32MLH |
|---|---|---|---|---|---|
| Package | 64-LQFP (10 x 10 mm) | 64-LQFP (10 x 10 mm) - same | 64-LQFP (10 x 10 mm) - same | 64-LQFP - same footprint | 64-LQFP - same footprint |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core | S08 8-bit CISC | S08 8-bit CISC | S08 8-bit CISC | S08 8-bit CISC | S08 8-bit CISC |
| Flash Memory | 32KB | 64KB | 128KB | 64KB | 32KB |
| USB | No | No | No | No | USB-capable DN family variant |
Key Differentiators
- Voltage-scaled clock maximizes battery flexibility (vs MC9S08DN32MLH)
- Right-sized flash for cost-sensitive volume (vs MC9S08JE64CLH)
- Headroom for firmware growth within the same footprint (vs MC9S08MM128ACLH)
Design Notes
Respect the voltage-frequency derating when selecting the power rail. Per the NXP datasheet summary, the CPU may run at 48MHz only at the top of the supply range, 40MHz above 2.1V, and 20MHz above 1.8V. If a 3.3V LDO feeds the MCU and the rail can droop under load transients, verify the droop floor stays above the threshold for your target clock across temperature. For battery designs ending near 1.8V, clock firmware down to 20MHz or implement voltage-monitored clock scaling.
The 64-LQFP 10 x 10 mm footprint places power pins for convenient decoupling; place 100nF ceramic capacitors at each VDD/VSS pin pair as close to the pins as possible, plus bulk capacitance near the regulator. Keep the BDM debug header routed with short traces for reliable flash programming during production. Under the LQFP, use the standard pull-back land pattern per the package mechanical drawing in the NXP technical data document; avoid extending traces under the package body where finer S08 timing signals run.
Do not assume peripheral parity between S08MM and S08JE/S08DN family members when substituting. Although all use the S08 core and 64-pin LQFP, peripheral sets and pin multiplexing differ; a drop-in swap can change timer channel mappings and analog pin assignments. Also confirm RAM size from the full datasheet - the web listings specify flash (32KB) but not RAM. Finally, program the flash security and option bytes deliberately on first production flash, since factory defaults may lock debug access.
Estimated: an 8-bit MCU at 48MHz typically dissipates tens of milliwatts; with the LQFP-64 theta_JA on a standard 4-layer board (on the order of 50 C/W), junction rise above ambient is only a few degrees C at typical loads. Thermal management is generally unnecessary; the 105C ambient capability per the digchip listing provides generous margin. Verify actual supply current from the datasheet electrical characteristics table for your clock/voltage operating point.
Compliance Information
RoHS compliant per digchip specification listing (ROHS COMPLIANT, LQFP-64). CLH package suffix denotes lead-free RoHS LQFP. REACH, halogen-free, and conflict-minerals declarations were not present in the retrieved web data.
