MC9S08AW32CPUE - S08 8-Bit MCU 32KB 40MHz LQFP-64 | NXP
MPN: MC9S08AW32CPUE ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.1 | $8.10 |
| 10 | $7.55 | $75.50 |
| 100 | $7 | $700.00 |
| 500 | $6.55 | $3,275.00 |
| 1,000 | $6.1 | $6,100.00 |
MC9S08AW32CPUE Overview
An 8-bit microcontroller (MCU) integrates a processor core, program flash, RAM, and peripheral modules such as timers, ADC and serial interfaces on a single chip. In the embedded systems hierarchy, the MC9S08AW32 sits in the cost-sensitive general-purpose MCU class, above dedicated ASICs and below 16/32-bit application processors, making it a workhorse for board-level control tasks.
Key features include the enhanced S08 CISC core executing the HC08 instruction set plus a BGND instruction, a 40 MHz internal bus clock capability (20 MHz bus frequency), single-wire background debug mode (BDM) for in-circuit programming, and 38 general-purpose I/O lines. The on-chip 10-bit ADC and multiple timer modules (per the S08AW family datasheet) support mixed-signal control loops without external components.
Technical depth: the AW32 uses a single-chip architecture with on-chip flash emulating EEPROM functionality for parameter storage, an internal oscillator block that reduces BOM cost by removing an external crystal in non-precise timing applications, and low-power wait/stop modes for battery-conscious designs. The 5V operation gives superior noise margin versus 3.3V-only competitors in industrial environments.
Typical applications include home appliances, industrial motor control and lighting, automotive body electronics (the S08AW family is qualified for industrial and automotive markets per NXP), and battery chargers where a robust 8-bit MCU with wide supply range is required.
Design consideration: because the part is listed NRND (Not Recommended for New Designs) on NXP's product page, new designs should evaluate the drop-in family members or newer S08/Kinetis derivatives to avoid last-time-buy risk; existing boards can still use the AW32 pin-compatible family for maintenance builds.
This page synthesizes verified distributor pricing, drop-in alternatives, and practical design notes not found in the NXP datasheet, refreshed as of 2026-10-18.
Drop-in alternatives for MC9S08AW32CPUE — 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 MC9S08AW32CPUE (same form factor and footprint) — differing in Package, Core Processor, Program Memory Size, RAM Size, Debug Interface.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC9S08AW60CPUE
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →MC9S08AW48CPUE
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
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View Datasheet →MC9S08AW16CPUE
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.2 / Unit
View Datasheet →MC9S08DV60AMLH
✅ Drop-In✓ In Stock
$3.85 / Unit
View Datasheet →MC9S08DZ32AMLH
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
Contact for price
View Datasheet →MC9S08AW32CPUE Maximum Ratings & Electrical Characteristics
| Core Processor | S08 |
| Core Size | 8-Bit |
| Max Clock Speed | 40 MHz |
| Internal Bus Frequency | 20 MHz |
| Flash Memory | 32KB (32K x 8) |
| RAM | 2KB |
| Supply Voltage Range | 2.7 V to 5.5 V |
| I/O Count | 38 |
| ADC Resolution | 10-bit |
| Instruction Set | HC08 with added BGND instruction |
| Debug Interface | Single-wire background debug mode (BDM) |
| Package | 64-LQFP (10x10 mm, 0.5 mm pitch, MO-220) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C |
| Packaging | Tray |
| Lifecycle Status | NRND (Not Recommended for New Designs) |
| Family | S08AW (AW60/48/32/16) |
MC9S08AW32CPUE 64-lqfp (10x10 mm, 0.5 mm pitch, mo-220) Pin Configuration Guide
Pin configuration for MC9S08AW32CPUE (64-lqfp (10x10 mm, 0.5 mm pitch, mo-220) 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 MC9S08AW32CPUE.
Refer to the datasheet for full pin configuration.
Typical Applications
MC9S08AW32CPUE is suitable for 6 applications: Home Appliance Control, Industrial Motor Control and Lighting, Automotive Body Electronics, Battery Chargers and Power Management, Sensor Nodes and Instrumentation, Legacy Board Maintenance and EOL Recovery.
Home Appliance Control
The MC9S08AW32CPUE is widely used in washing machines, cookers, and HVAC appliance control boards where a robust 5V-tolerant 8-bit MCU keeps BOM cost low. Its 2.7V-5.5V supply tolerance absorbs noisy appliance power rails, while the 10-bit ADC reads NTC temperature sensors and user potentiometers without external signal conditioning. The 38 GPIO lines drive relays, seven-segment displays, and touch or mechanical buttons directly. With 32KB flash, the full state machine, display driver, and sensor compensation tables fit comfortably, and flash EEPROM emulation stores user settings across power cycles. Single-wire BDM enables production programming through a single pad, simplifying end-of-line test fixtures.
Recommended
Industrial Motor Control and Lighting
In small motor drives, dimmers, and industrial lighting ballasts, the MC9S08AW32CPUE provides a 40 MHz core and 20 MHz bus frequency - sufficient for closed-loop PWM control of fans, pumps, and BLDC motors at moderate speeds. The 10-bit ADC with multiple channels supports current-sense shunt monitoring and back-EMF sampling, while hardware timer PWM outputs drive MOSFET gate stages. Operation at 5V yields superior noise margin in electrically noisy switch-mode environments compared to 3.3V controllers. The S08AW family's industrial qualification and internal oscillator option reduce crystal-related failures on vibrating machinery. Its 32KB flash accommodates FOC-lite or trapezoidal commutation firmware with protective fault handling.
Recommended
Automotive Body Electronics
NXP positions the S08AW family for automotive applications, and the MC9S08AW32CPUE fits body-control functions such as window lift modules, mirror controllers, seat adjusters, and interior lighting. The wide 2.7V-5.5V operating range tolerates load-dump and cranking conditions on a regulated 5V rail, and the 38 I/O lines handle switch matrices, relay drivers, and LIN or SCI communication to the body controller. The 10-bit ADC reads position sensors and diagnostics feedback. Because the part is NRND, automotive tier-1s use it for running production carry-over boards and should plan migration to NXP's automotive-qualified S12 MagniV or S32K families for new platforms.
Recommended
Battery Chargers and Power Management
Smart chargers for lead-acid, NiMH, and Li-ion packs benefit from the MC9S08AW32CPUE's combination of 10-bit ADC, PWM timers, and low-power stop modes. The MCU implements CC/CV charging curves, temperature-foldback using NTC inputs, and fault protection logic, while timer PWM regulates a buck or flyback stage. The internal oscillator removes crystal cost in chargers where timing precision is not critical, and flash EEPROM emulation logs charge cycles and calibration data. Stop-mode current extends standby life in wall-powered but efficiency-regulated designs. 32KB flash supports multiple chemistry profiles selectable by jumper or detected cell count, all within one code image.
Recommended
Sensor Nodes and Instrumentation
Bench instruments, environmental sensors, and industrial transmitters use the MC9S08AW32CPUE where a 5V MCU simplifies interfacing with legacy analog front ends. The 10-bit ADC digitizes 0-5V sensor outputs directly without level shifting, and the SPI/I2C peripherals (per the S08AW datasheet) connect external precision ADCs, EEPROM, or displays. Its 20 MHz bus supports digital filtering and linearization tables in 32KB flash, while the wide supply range suits 24V industrial systems with a simple linear or buck regulator front end. Single-wire BDM supports field re-calibration tooling through the existing harness connector, an advantage for distributed instrumentation fleets.
Recommended
Legacy Board Maintenance and EOL Recovery
With the MC9S08AW32CPUE classified NRND, service organizations maintaining deployed appliance, automotive, and industrial boards face supply risk. The pin-compatible MC9S08AW60CPUE and MC9S08AW48CPUE are the preferred drop-ins, requiring only linker/memory-map changes since the S08AW family shares its pinout across memory variants. Distributors such as DigiKey, Mouser, LCSC, and Heisener still hold stock (Heisener reported ~17,000 pieces), giving time for a structured last-time-buy. XAIPART stocks both the AW32 and AW60 to bridge maintenance windows. Firmware developed in CodeWarrior for the AW32 compiles for family variants without source changes in most cases.
Recommended
Recommended Products Summary
Engineering reference data for MC9S08AW32CPUE — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S08AW60CPUE | MC9S08AW48CPUE | MC9S08AW16CPUE | MC9S08DV60AMLH |
|---|---|---|---|---|---|
| Package | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP - same family size, verify pinout |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Flash Memory | 32KB | 60KB | 48KB | 16KB | 60KB |
| Core / Max Clock | S08, 40 MHz | S08, 40 MHz | S08, 40 MHz | S08, 40 MHz | S08, 50 MHz class |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Additional Peripherals | 10-bit ADC, timers, SCI/SPI/I2C | Same peripheral set | Same peripheral set | Same peripheral set | Adds CAN-capable DV peripheral mix |
Key Differentiators
- 5V noise margin versus 3.3V-only 8-bit MCUs (vs MC9S08DV60AMLH)
- Flash headroom in same footprint (vs MC9S08AW60CPUE)
- LQFP hand-assembly and legacy repair advantage (vs MC9S08AC96MFGE)
Design Notes
Decouple the VDD/VSS pairs with 0.1uF ceramic capacitors placed within 5 mm of each supply pin pair, plus one 4.7-10uF bulk capacitor near the MCU. The 2.7-5.5V range tolerates regulated 5V industrial rails, but keep trace inductance low because S08 flash programming and ADC sampling create transient supply currents. If using the internal oscillator, supply ripple on VDD directly degrades clock accuracy - an RC filter or ferrite bead on the MCU supply is recommended in motor-control environments.
The part is NRND per NXP's product page: do not start new designs on MC9S08AW32CPUE. If repairing or building out legacy stock, verify date codes and plan the last-time-buy now. Migration to MC9S08AW60CPUE is pin-compatible and requires only linker changes, but interrupt vector tables differ by flash size - recompile rather than binary-copy firmware. Also confirm the 'C' temperature suffix matches your ambient requirement before mixing family variants on one build.
The 64-LQFP (10x10 mm, 0.5 mm pitch) is hand-solderable but requires the standard QFP land pattern per IPC-7351 geometry; avoid oversized pads that cause solder bridging across the 0.5 mm pitch. Route the single-wire BDM trace to a test point or header during layout - retrofitting debug access after production is the most common rework request on S08 boards. Keep the ADC reference path (VDDA/VSSA if broken out) star-routed away from PWM return currents for accurate 10-bit conversions.
Compliance Information
NXP product page lists an Environmental Quality section for this part, but specific RoHS/REACH status was not included in the retrieved data. NXP states the S08AW family supports industrial and automotive industry applications. Consult the NXP part page for current environmental certifications.
