MC9S08AW32CFDER - S08 8-bit MCU 32KB Flash 40MHz QFN-48 | NXP
MPN: MC9S08AW32CFDER ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.85 | $3.85 |
| 10 | $3.47 | $34.70 |
| 100 | $3.05 | $305.00 |
| 500 | $2.72 | $1,360.00 |
| 1,000 | $2.41 | $2,410.00 |
MC9S08AW32CFDER Overview
An 8-bit microcontroller (MCU) is a single-chip computer integrating a processor core, program memory, data RAM, and peripherals such as timers, serial interfaces, and an analog-to-digital converter. Within the embedded systems hierarchy, the S08AW sits in the general-purpose 8-bit MCU class, positioned below 16-bit and 32-bit families like S12, ColdFire, and Kinetis, and above simple state-machine logic. MCUs of this class execute real-time control loops, manage human-machine interfaces, and coordinate peripheral communication in cost-sensitive designs.
Key features of the MC9S08AW32CFDER include the enhanced S08 CPU core clocked up to 40 MHz via an internal bus-clock configuration, 32 KB of in-system-programmable FLASH enabling field firmware updates, and a rich peripheral set typical of the AW family: an 8-channel ADC, multiple timers with PWM capability, and serial communication interfaces (SCI/SPI). The exposed-pad QFN-48 (7x7 mm) package improves thermal and ground performance while maintaining a compact 0.5 mm pitch footprint for surface-mount assembly.
Architecturally, the S08AW family shares a common enhanced S08 core with a single-cycle 8-bit CPU, background debug mode (BDM) for non-intrusive flash programming and debugging, and a flexible clock system supporting crystal, oscillator, or internal reference sources. Memory map organization separates direct-page RAM for fast access, and the FLASH endurance and retention specifications follow NXP standard MCU qualifications. According to the NXP S08AW family product page, all AW family members support both industrial and automotive industry requirements.
Typical applications include industrial motor control and power-supply supervision, automotive body electronics such as window lift, lighting control, and sensor monitoring, plus consumer appliance control boards where 8-bit cost structure and 32 KB flash headroom are a good fit.
A key design consideration: the 40 MHz rating refers to core/bus operation under proper clock configuration and supply conditions; verify the exact supply voltage range and bus-frequency-versus-voltage derating in the manufacturer datasheet before finalizing clock planning. Budget flash usage to preserve room for field updates.
This page synthesizes distributor pricing, drop-in family alternatives, application guidance, and design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for MC9S08AW32CFDER — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC9S08AW48CFDER
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MC9S08AW16CFDER
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MC9S08AW60CFDER
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MC9S08AW32CFDER Maximum Ratings & Electrical Characteristics
| Core Processor | S08 (HCS08 8-bit) |
| Core Size | 8-bit |
| Maximum Clock Frequency | 40 MHz |
| Program Memory Size | 32 KB (32K x 8) |
| Program Memory Type | FLASH |
| Package | 48-QFN-EP (7x7 mm), 48-VFQFN Exposed Pad |
| Mounting Type | Surface Mount |
| Series | S08AW (AW32) |
| Industry Segments | Industrial and Automotive |
| Debug Interface | Background Debug Mode (BDM) |
MC9S08AW32CFDER 48-qfn-ep (7x7 mm), 48-vfqfn exposed pad Pin Configuration Guide
Pin configuration for MC9S08AW32CFDER (48-qfn-ep (7x7 mm), 48-vfqfn exposed pad 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 MC9S08AW32CFDER.
Refer to the datasheet for full pin configuration.
Typical Applications
MC9S08AW32CFDER is suitable for 6 applications: Automotive Body Electronics, Industrial Motor Control, Power Supply Supervision and Management, Sensor and Transducer Interfaces, Home Appliance Control Boards, Industrial Networking Gateways (legacy HCS08 fleets).
Automotive Body Electronics
The MC9S08AW32CFDER fits automotive body control functions such as lighting modules, window-lift controllers, and wiper control because the S08AW family is explicitly specified by NXP for the automotive industry. The 40 MHz S08 core handles time-multiplexed lamp diagnostics and switch scanning, while 32 KB FLASH accommodates protocol code (LIN-style polling) plus calibration tables. The 48-QFN 7x7 mm package suits compact modules behind headlamp housings. Its integrated ADC reads potentiometer position feedback and temperature sensors, and PWM-capable timers drive MOSFET lamp drivers with soft-start ramps, reducing EMI relative to hard switching in vehicle power networks.
Recommended
Industrial Motor Control
For small motor control in industrial equipment (fans, pumps, actuators), the MC9S08AW32CFDER provides the real-time PWM generation and ADC feedback loop typical of 8-bit embedded control. The 40 MHz bus allows 8-bit control-loop math at kilohertz PWM carrier frequencies with overhead for current-limit protection, and the 32 KB FLASH stores commutation tables plus a simple parameter interface. The exposed-pad QFN-48 gives a solid ground reference for gate-driver layout. According to NXP, the AW family targets low-cost, high-performance control, making it a standard choice over discrete logic in cost-optimized industrial drives.
Recommended
Power Supply Supervision and Management
The MC9S08AW32CFDER serves as a supervision controller in power supplies and battery chargers, where the internal ADC monitors output voltage and temperature via divider networks and the timers implement soft-start and fault-retry timing. Its 3V-class operation and low-cost structure allow a dedicated supervisory MCU without inflating system BOM cost. The 32 KB FLASH supports field-updatable charging profiles and logging of fault events across the flash endurance budget. The QFN-48 exposed pad anchors the ground plane for clean ADC references, and the BDM header permits recalibration of thresholds during production test of the power stage.
Recommended
Sensor and Transducer Interfaces
In industrial and automotive sensing nodes, the MC9S08AW32CFDER reads analog transducers with its ADC, applies linearization stored in flash, and transmits results over its serial interfaces (SCI/SPI) to a host controller. The 40 MHz core provides margin for digital filtering (moving-average, IIR) on noisy channels, and the 32 KB FLASH holds multi-sensor calibration tables that would not fit on 8 KB class parts. The 48-pin QFN exposes enough port pins for multiplexed sensor channels and local status LEDs. Its HCS08 heritage and NXP long-term availability make it a safe embed for installed-base sensor retrofits.
Recommended
Home Appliance Control Boards
Consumer appliance controllers (dishwashers, coffee machines, air handlers) use the MC9S08AW32CFDER to scan touch or membrane keypads, drive TRIAC/relay loads via timer PWM outputs, and manage buzzer and display interfaces. The 32 KB FLASH accommodates state machines, wash-cycle tables, and localized menus, while the 8-bit cost structure keeps the controller BOM competitive at appliance volumes. The 7x7 mm QFN-48 fits single-sided control PCBs common in appliance design. Robust BDM-based programming allows one firmware image to be flashed per appliance variant in final assembly, simplifying manufacturing logistics.
Recommended
Industrial Networking Gateways (legacy HCS08 fleets)
Many installed HCS08 fleets use the AW32 as a serial-protocol converter between legacy equipment and modern controllers; the MC9S08AW32CFDER continues that role with SCI/SPI bridging and protocol translation code resident in 32 KB FLASH. The 40 MHz core sustains buffered UART throughput at 115 kbaud with framing checks, and nonvolatile flash logging stores communication statistics. For new networked designs, the same S08 code base can migrate to CAN-equipped siblings, preserving firmware investment. This MCU suits gateway and bridge functions where 32-bit performance is unnecessary and long-term replacement availability matters more than peak throughput.
Recommended
Recommended Products Summary
Engineering reference data for MC9S08AW32CFDER — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S08AW48CFDER | MC9S08AW16CFDER | MC9S08AW60CFDER |
|---|---|---|---|---|
| Package | 48-QFN-EP (7x7 mm) | 48-QFN-EP (7x7 mm) - same | 48-QFN-EP (7x7 mm) - same | 48-QFN-EP (7x7 mm) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core / Clock | S08, 40 MHz | S08, 40 MHz | S08, 40 MHz | S08, 40 MHz |
| FLASH Memory | 32 KB | 48 KB | 16 KB | 60 KB |
| Family | S08AW (AW32) | S08AW (AW48) | S08AW (AW16) | S08AW (AW60) |
| Industry Segments | Industrial and Automotive | Industrial and Automotive | Industrial and Automotive | Industrial and Automotive |
| Debug Interface | BDM | BDM | BDM | BDM |
Key Differentiators
- Balanced 32 KB FLASH with automotive-family pedigree (vs MC9S08AW16CFDER)
- Cost-optimized code space for simple firmware (vs MC9S08AW60CFDER)
- Legacy S08 ecosystem with BDM tooling and mature code base (vs Cross-brand 8-bit MCUs (e.g., PIC/AVR/STM8 class))
Design Notes
Solder the exposed pad of the 48-QFN (7x7 mm) package to a grounded copper pour with an array of thermal vias. This pad is the primary ground return for the device; relying only on the perimeter ground pins increases ground bounce during simultaneous port switching and degrades ADC accuracy. Follow the NXP-recommended land pattern with 0.5 mm pitch, and use a no-clean or water-wash compatible solder paste with the stencil apertures sized per QFN pad-ratio guidelines to avoid voiding under the pad.
Place a 0.1 uF ceramic decoupling capacitor within 2 mm of each VDD/VSS pin pair, plus one bulk capacitor (4.7 uF to 10 uF) near the module. The distributor data lists a 3 V class supply; verify the exact VDD range and the bus-frequency-versus-voltage derating curve in the NXP S08AW datasheet before running the full 40 MHz configuration, since bus frequency derates at the low end of the voltage range. A supervisor/reset IC on VDD ensures reliable power-on flash boot.
Design a BDM (Background Debug Mode) header into the PCB even for production boards - the single-wire BDM interface is the only route to flash programming and in-circuit debugging on S08 devices, and reworking a 48-QFN to retrofit a header is costly. Also confirm the exact memory map: 32 KB FLASH leaves direct-page RAM constraints that affect your C compiler memory model; checking this before committing firmware architecture avoids late-stage porting between AW32 and AW48/AW60 variants.
Compliance Information
Compliance status must be confirmed from the official NXP product page and material declarations; the verified web data retrieved for this page does not contain explicit RoHS/REACH statements for this ordering suffix.
