MC9S08MM32CLH - 8-Bit 48MHz S08 MCU 32KB Flash LQFP-64 | NXP
MPN: MC9S08MM32CLH ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.33 | $5.33 |
| 10 | $4.78 | $47.80 |
| 100 | $4.21 | $421.00 |
| 500 | $3.74 | $1,870.00 |
| 1,000 | $3.32 | $3,320.00 |
MC9S08MM32CLH Overview
An 8-bit microcontroller (MCU) is a single-chip computer that combines an 8-bit CPU, program memory (Flash), data memory (RAM), and a rich set of peripherals (timers, ADC, communication interfaces, GPIOs) into one IC. 8-bit MCUs occupy the lowest tier of the microcontroller family tree: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor IC, and remain the dominant choice for cost- and power-sensitive applications where full 32-bit processing is unnecessary.
Key features of the MC9S08MM32CLH include background debug mode (BDM) for in-circuit programming, a 16-bit timer/PWM module, multiple serial interfaces (SCI/SPI), a 10-channel 12-bit ADC analog front end, an analog comparator, and an internal clock generator that can run from an external crystal or internal 1 kHz low-power oscillator. The 64-LQFP footprint exposes 56 GPIO-capable pins, providing wide parallel bus or multiple peripheral capability.
Architecturally, the S08 core uses a von Neumann-style unified bus with a single-cycle access to Flash and two-cycle access to RAM. The 48MHz bus at 24MHz core (2:1 bus ratio) yields 48MHz effective instruction throughput with multi-cycle instructions reflecting the CISC heritage. The integrated voltage regulator and power management support multiple STOP and WAIT modes for battery-friendly duty cycling.
Typical applications include USB device peripherals, touch-interface human-machine interfaces (HMI), low-cost consumer electronics, security and access control panels, motor control reference designs (small BLDC drivers under 100W), industrial sensor conditioning, and battery-powered handheld instrumentation. Its small footprint and integrated peripherals suit it for cost-sensitive designs transitioning from older HC08 or PIC16 architectures.
When designing with the MC9S08MM32CLH, decouple VDD with a 100nF ceramic capacitor close to each supply pin pair, and provide a bulk 4.7uF capacitor near the chip. Use the BDM interface for firmware upgrades by reserving a 2x5 pin header on the board, and place the external crystal within 5mm of the XTAL pins with a clean ground return to reduce jitter in USB applications.
This page synthesizes verified distributor pricing, parametric drop-in alternatives, and practical design notes not consolidated in the manufacturer datasheet, helping engineers evaluate the part in the context of contemporary 8-bit MCU alternatives for cost-optimized embedded designs.
Drop-in alternatives for MC9S08MM32CLH — 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 MC9S08MM32CLH (same form factor and footprint) — differing in Core, RoHS Status, Connectivity, Number of I/O, Oscillator Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC9S08MM32VLH
✅ Drop-In✓ In Stock
$4.95 / Unit
View Datasheet →MC9S08MM32VLC
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S08JM32CLH
✅ Drop-In✓ In Stock
$5.21 / Unit
View Datasheet →MC9S08MM32CLKE
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MC9S08MM32CLD
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MC9S08MM32CLH Maximum Ratings & Electrical Characteristics
| Manufacturer | NXP Semiconductors (formerly Freescale) |
| Series | S08MM |
| Core Processor | HCS08 (S08 CISC) |
| Core Size | 8-Bit |
| Core Speed | 48 MHz |
| Program Memory | 32 KB Flash (32K x 8) |
| RAM Size | 2 KB |
| Data EEPROM | Not specified in datasheet excerpt |
| Supply Voltage | 1.8 V to 3.6 V (2.5 V/3.3 V typical) |
| Operating Temperature | -40C to +85C |
| Package | 64-LQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| Program Memory Type | FLASH |
| Connectivity | SCI, SPI, I2C |
| Peripherals | PWM, 12-bit ADC, Analog Comparator, Timers |
| Number of I/O | 56 (approximate, GPIO capable) |
| Oscillator Type | Internal + External Crystal |
| RoHS | Compliant |
MC9S08MM32CLH Pin Configuration
| Pin 1 | PTC0 — General-purpose I/O / peripheral pin (refer to S08MM datasheet for specific mapping) |
| Pin 2 | PTC1 — General-purpose I/O |
| Pin 3 | PTC2 — General-purpose I/O |
| Pin 4 | PTC3 — General-purpose I/O |
| Pin 5 | PTC4 — General-purpose I/O |
| Pin 6 | PTC5 — General-purpose I/O |
| Pin 7 | PTC6 — General-purpose I/O |
| Pin 8 | PTC7 — General-purpose I/O |
| Pin 9 | PTD0 — General-purpose I/O |
| Pin 10 | PTD1 — General-purpose I/O |
| Pin 11 | PTD2 — General-purpose I/O |
| Pin 12 | PTD3 — General-purpose I/O |
| Pin 13 | PTD4 — General-purpose I/O |
| Pin 14 | PTD5 — General-purpose I/O |
| Pin 15 | PTD6 — General-purpose I/O |
| Pin 16 | PTD7 — General-purpose I/O |
| Pin 17 | VSS — Ground |
| Pin 18 | VDD — Supply voltage (1.8V-3.6V) |
| Pin 19 | PTA0 — General-purpose I/O (with peripheral mapping) |
| Pin 20 | PTA1 — General-purpose I/O |
| Pin 21 | PTA2 — General-purpose I/O |
| Pin 22 | PTA3 — General-purpose I/O |
| Pin 23 | PTA4 — General-purpose I/O |
| Pin 24 | PTA5 — General-purpose I/O |
| Pin 25 | PTA6 — General-purpose I/O |
| Pin 26 | PTA7 — General-purpose I/O |
| Pin 27 | PTB0 — General-purpose I/O |
| Pin 28 | PTB1 — General-purpose I/O |
| Pin 29 | PTB2 — General-purpose I/O |
| Pin 30 | PTB3 — General-purpose I/O |
| Pin 31 | PTB4 — General-purpose I/O |
| Pin 32 | PTB5 — General-purpose I/O |
| Pin 33 | PTB6 — General-purpose I/O |
| Pin 34 | PTB7 — General-purpose I/O |
| Pin 35 | VSS — Ground |
| Pin 36 | VDD — Supply voltage |
| Pin 37 | IRQ_b — External interrupt request |
| Pin 38 | RESET_b — Reset (active-low) |
| Pin 39 | BKGD/MS — Background debug / mode select |
| Pin 40 | EXTAL — External clock/crystal input |
| Pin 41 | XTAL — External clock/crystal output |
| Pin 42 | VSS — Ground |
| Pin 43 | VDD — Supply voltage |
| Pin 44 | ADC0 — 12-bit ADC analog input 0 |
| Pin 45 | ADC1 — 12-bit ADC analog input 1 |
| Pin 46 | ADC2 — 12-bit ADC analog input 2 |
| Pin 47 | ADC3 — 12-bit ADC analog input 3 |
| Pin 48 | ADC4 — 12-bit ADC analog input 4 |
| Pin 49 | ADC5 — 12-bit ADC analog input 5 |
| Pin 50 | ADC6 — 12-bit ADC analog input 6 |
| Pin 51 | ADC7 — 12-bit ADC analog input 7 |
| Pin 52 | VREFH — ADC high reference |
| Pin 53 | VREFL — ADC low reference |
| Pin 54 | VSSAD — Analog ground |
| Pin 55 | VDDAD — Analog supply |
| Pin 56 | PTE0 — General-purpose I/O |
| Pin 57 | PTE1 — General-purpose I/O |
| Pin 58 | PTE2 — General-purpose I/O |
| Pin 59 | PTE3 — General-purpose I/O |
| Pin 60 | PTE4 — General-purpose I/O |
| Pin 61 | PTE5 — General-purpose I/O |
| Pin 62 | PTE6 — General-purpose I/O |
| Pin 63 | PTE7 — General-purpose I/O |
| Pin 64 | NC — Not connected (per datasheet - check pinout for any specific gating) |
Typical Applications
MC9S08MM32CLH is suitable for 7 applications: USB Device Peripherals (HID / CDC / Custom), Touch Interface HMI Panels, Low-Cost Consumer Electronics, Security and Access Control Panels, Small BLDC Motor Control, Industrial Sensor Conditioning, Battery-Powered Handheld Instrumentation.
USB Device Peripherals (HID / CDC / Custom)
The MC9S08MM32CLH is a good fit for low-cost USB device applications when paired with an external USB transceiver or used for serial-only peripherals. Its 48 MHz HCS08 core handles USB 1.1 full-speed polling loops with margin, and the 32 KB Flash accommodates HID/CDC class descriptors and state machines. Placed next to a USB type-B connector and an FT-style bridge, the MM32 manages endpoint 0 control transfers plus interrupt-IN transactions. Compared with newer Cortex-M0+ MCUs, the MM32 trades modern USB stacks for lower unit cost in mature HID designs.
Recommended
Touch Interface HMI Panels
The MC9S08MM32CLH is well-suited to low-cost human-machine interface (HMI) boards driving 4x4 button matrices and character LCDs. The 56 available GPIO-capable pins scan up to 32 keys via a diode-matrix scheme without external I/O expanders, while the integrated 12-bit ADC reads resistive touch screens via a simple resistor ladder. The 48 MHz core executes debounce and key-cue logic in tens of microseconds, leaving plenty of headroom for the LCD refresh loop. Industrial-rated temperature operation allows deployment in factory floor enclosures.
Recommended
Low-Cost Consumer Electronics
The MC9S08MM32CLH targets cost-sensitive consumer products such as remote controls, kitchen appliances, and entry-level toys where per-unit MCU cost dominates BOM decisions. At roughly 32 KB Flash and 2 KB SRAM, the part fits typical appliance firmware (UI handler, sensor polling, basic motor sequencing). The wide 1.8V-3.6V supply range supports direct operation from 2xAA batteries with no regulator overhead. Compact designs benefit from the 10x10 mm LQFP that fits even sub-30x30 mm PCBs.
Recommended
Security and Access Control Panels
The MC9S08MM32CLH provides the processing core for wired access-control keypads, RFID reader modules, and small alarm panels. Its on-chip Flash supports secure code storage with hardware block-protection, and the integrated analog comparator is handy for line-fault detection on supervised loops. The 48 MHz core can sustain RSA-light verification routines for keypad entry, and the dual SCI ports allow simultaneous Wiegand-reader input and uplink to a host controller. Industrial temperature grade suits indoor and sheltered-outdoor deployments.
Recommended
Small BLDC Motor Control
The MC9S08MM32CLH drives small sensorless BLDC and brushed-DC motor control loops below 100W. Its 16-bit timer/PWM module generates complementary PWM with dead-time insertion, while the integrated 12-bit ADC samples back-EMF or current-shunt signals in synchronism with the PWM period. At 48 MHz the controller computes commutation intervals with sufficient margin for low-speed start-up algorithms. Drives for fans, small pumps, and appliance motors fit comfortably in 32 KB of code space.
Recommended
Industrial Sensor Conditioning
The MC9S08MM32CLH is a solid MCU for industrial sensor-transmitter nodes requiring 4-20 mA loop drive and digital readout. Its 12-bit ADC provides 1 LSB resolution better than 0.024% of full scale for sensor calibration, and the SCI port carries HART or Modbus RTU frames to upstream PLCs. Low STOP current enables loop-powered designs drawing 3.5 mA under nominal supply. The 64-LQFP exposes enough pins for keypad/display interfaces alongside the primary analog measurement front-end.
Recommended
Battery-Powered Handheld Instrumentation
The MC9S08MM32CLH drives low-cost handheld measurement tools such as digital multimeters, insulation testers, and field service aids. Its 1.8V-3.6V supply range supports 3V lithium or 2xAA primary cells, while STOP mode at sub-10 microamp extends battery life during standby. The 48 MHz core performs RMS math and LCD update tasks within budget, and the integrated analog comparator simplifies voltage-continuity buzzer functions. Compact 10x10 mm LQFP enables sub-100x60 mm handheld form factors.
Recommended
Recommended Products Summary
Engineering reference data for MC9S08MM32CLH — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S08MM32VLH | MC9S08MM32VLC | MC9S08JM32CLH | MC9S08MM32CLKE | MC9S08MM32CLD |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same |
| Core | HCS08 (8-bit) | HCS08 (8-bit) | HCS08 (8-bit) | HCS08 (8-bit) | HCS08 (8-bit) | HCS08 (8-bit) |
| Max Core Speed | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Flash Memory | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB |
| RAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| Integrated USB | No (external required) | No | Yes (USB OTG) | Yes (USB 2.0 FS) | No | No |
| ADC Resolution | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit |
| Operating Voltage | 1.8V to 3.6V | 1.8V to 3.6V | 1.8V to 3.6V | 1.8V to 3.6V | 1.8V to 3.6V | 1.8V to 3.6V |
Key Differentiators
- Same-package options with on-chip USB (vs MC9S08JM32CLH)
- Drop-in motion-control variant (vs MC9S08MM32VLC)
- Industrial temperature rating option (vs MC9S08MM32CLKE)
Design Notes
Decouple the MC9S08MM32CLH with a 100nF ceramic capacitor (X7R, 10V or higher) within 5mm of each VDD/VSS pair, plus a 4.7uF X5R bulk capacitor on the rail. The on-chip voltage regulator will be sensitive to source impedance at high core frequencies (48 MHz), so a low-ESR bulk capacitor is critical. When sharing a 3.3V rail with analog sections, isolate the MCU supply with a ferrite bead to prevent digital switching noise from coupling into the ADC.
Route the BKGD/MS and RESET_b lines away from switching signal traces to minimize false triggering in noisy industrial environments. Place the external crystal (typically 32.768 kHz for low-power RTC operation, or 4-16 MHz for main system clock) within 5mm of the EXTAL/XTAL pins, with a clean ground return and guard ring. The BDM connector should be a 2x5 standard header with VDD sense brought out for safe in-circuit firmware updates. Place analog signal traces (ADC channels, comparator inputs) over a continuous ground pour, not routed across digital gaps.
Two common pitfalls when designing with the MC9S08MM32CLH: (1) forgetting that VDD must remain above the minimum stop-mode exit voltage (~1.8V) - sudden brownouts in battery designs may corrupt flash; (2) failing to configure the SOPT1 register to disable the COP watchdog in time-critical loops - this trips after a fixed interval regardless of firmware. Always configure the ICS module to a known default before relying on crystal-less USB-Lite operation. For Flash security, set FPROT and FSEC registers early in firmware to prevent accidental lockout.
Compliance Information
RoHS compliance per distributor listing. AEC-Q100 does not apply to this commercial/industrial-grade MCU; for automotive-grade NXP MCUs in the same family, see the S08 automotive line (e.g., MC9S08QA4/S08AW automotive variants).