MC908AP32CFBE - 8-Bit HC08 MCU 32KB Flash 44-QFP | NXP
MPN: MC908AP32CFBE ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
MC908AP32CFBE Overview
An 8-bit microcontroller is a single-chip embedded processor that integrates a CPU core, program memory (FLASH), RAM, timers, analog-to-digital conversion, and general-purpose I/O on one die, sitting at the entry level of the microcontroller hierarchy (MCU -> embedded processor -> integrated circuit). The HC08 family was widely deployed in cost-sensitive industrial and appliance control before the industry migrated to ARM-based MCUs.
Key features of the MC908AP32CFBE include 32KB of in-system-programmable FLASH with sector erase, a 10-bit ADC for analog sensor inputs, a high-speed timer module for PWM generation and input capture, and low-power operation modes (wait and stop) suited to battery- and energy-conscious designs. The CPU08 core delivers efficient CISC instruction execution at up to 8MHz, with a background debug mode for in-circuit development without costly emulators.
Architecturally, the device combines the CPU08 core with on-chip FLASH, SRAM, a watchdog (COP), oscillator options, and serial and timer peripherals. The 3.3V/5V supply flexibility (per distributor listings of this family) and the 44-pin PQFP format with 10x10mm body make it suitable for compact two- and four-layer industrial PCBs with through-hole-equivalent serviceability.
Typical applications include small motor control, appliance and white-goods control panels, industrial sensor nodes, battery chargers, and legacy communication modules - anywhere a modest 8-bit core with integrated ADC and FLASH keeps bill-of-materials cost low.
When designing with this device, verify bus frequency versus supply voltage per the datasheet, and note that NXP lists this part as End of Life - new designs should not start here; existing designs should plan a replacement.
This page synthesizes distributor data, lifecycle status, drop-in family alternatives, and practical design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for MC908AP32CFBE — 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 MC908AP32CFBE (same form factor and footprint) — differing in Core, ADC, Program Memory Size, Supply Voltage, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC908AP32ACFBE
✅ Drop-In✓ In Stock
$29.663 / Unit
View Datasheet →MC908AP16CFBE
✅ Drop-In✓ In Stock
$13.6 / Unit
View Datasheet →MC908AP64CFBE
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MC908MR32CBE
✅ Drop-In✓ In Stock
$7.25 / Unit
View Datasheet →MC908AP32CFBE Maximum Ratings & Electrical Characteristics
| Core Processor | HC08 (CPU08) |
| Core Size | 8-Bit |
| Architecture | CISC |
| Maximum Clock Frequency | 8 MHz |
| Program Memory Size | 32KB (32K x 8) |
| Program Memory Type | FLASH |
| ADC Resolution | 10 bit |
| Supply Voltage | 3.3 V / 5 V (family listing) |
| Package | 44-QFP (10x10 mm) PQFP |
| Mounting Type | Surface Mount |
| Peripherals | High-speed timer, LVI, COP watchdog, low-power modes |
| Packaging | Tray (family listing: REEL 13" ordering variant available) |
| Lifecycle Status | End of Life (per NXP product page) |
MC908AP32CFBE 44-qfp (10x10 mm) pqfp Pin Configuration Guide
Pin configuration for MC908AP32CFBE (44-qfp (10x10 mm) pqfp 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 MC908AP32CFBE.
Refer to the datasheet for full pin configuration.
Typical Applications
MC908AP32CFBE is suitable for 6 applications: Small Motor Control, Appliance and White-Goods Control Panels, Industrial Sensor Nodes, Battery Chargers, Legacy Communication Modules, Security and Access Control Panels.
Small Motor Control
The MC908AP32CFBE fits low-complexity motor control tasks where its high-speed timer provides PWM outputs for drives and its 10-bit ADC reads back shunt or pot feedback. The CPU08 core at 8MHz executes closed-loop control loops for fans, pumps, and small appliance motors with adequate sampling rates, while 32KB FLASH stores commutation tables and fault handling. Integrated COP watchdog improves safety in unattended equipment. Because the part is EOL, use it to sustain existing motor boards and evaluate NXP's current motor-control MCUs for new designs; the architecture's deterministic 8-bit instruction timing still simplifies legacy code certification.
Recommended
Appliance and White-Goods Control Panels
Appliance control panels need low cost, sensor inputs, and basic user-interface timing - exactly the MC908AP32CFBE's profile. The 10-bit ADC digitizes NTC thermistors and potentiometers; the high-speed timer generates button-scan and buzzer timing; 32KB FLASH holds state machines for wash/bake cycles. Its 3.3V/5V supply flexibility (per family listings) suits mains-derived power supplies, and the 44-QFP (10x10 mm) body offers enough I/O for displays, relays, and switches on a low-layer-count PCB. Wait and stop modes trim standby power. This remains a valid maintenance choice for service parts, though redesigns should target active MCU families with better supply guarantees.
Recommended
Industrial Sensor Nodes
In industrial sensing, the MC908AP32CFBE digitizes analog transducers through its 10-bit ADC and scales or linearizes readings with firmware in 32KB FLASH. The CPU08's CISC instruction set handles integer math for calibration curves efficiently at 8MHz, and the on-chip LVI and COP watchdog deliver the robustness required in electrically noisy factory environments. The 44-QFP surface-mount package supports compact, conformally coated sensor boards. Legacy sensor product lines already qualified on this device can keep shipping using residual stock; new sensor nodes should select an actively manufactured MCU with richer serial connectivity such as LIN, SPI, or UART with DMA.
Recommended
Battery Chargers
Battery charger control uses the MC908AP32CFBE's 10-bit ADC to monitor cell voltage and current, while the high-speed timer generates charge PWM with duty-cycle control for CC/CV profiles. 32KB FLASH stores multi-chemistry charging algorithms including taper detection and fault timeout logic, and the CPU08's low-power stop mode suits trickle-standby behavior between charge cycles. The 44-QFP (10x10 mm) footprint allows the controller to sit directly on the power PCB. For maintaining a qualified charger product this part remains serviceable from EOL stock, but new charger platforms should choose MCUs with dedicated high-resolution PWM and integrated comparators to reduce external parts.
Recommended
Legacy Communication Modules
Older serial communication modules - simple UART-based gateways, keypads, and protocol converters - were commonly built on the HC08AP family. The MC908AP32CFBE's CPU08 core handles serial framing and checksums at 8MHz, its timers generate baud and timeout bases, and 32KB FLASH stores protocol stacks with margin for customization. Its 5V-tolerant I/O family heritage simplifies interfacing with legacy 5V logic levels common in installed industrial equipment. When repairing or extending these modules, the same-footprint AP64 variant adds code space for extra protocol features without PCB changes; all sourcing, however, is constrained by the part's End-of-Life status.
Recommended
Security and Access Control Panels
Access-control keypads and small alarm panels match the MC908AP32CFBE's capabilities: the 10-bit ADC reads tamper and ambient-light sensors, timers handle keypad debounce, backlighting, and siren timing, and 32KB FLASH stores code tables plus event logs in RAM. The COP watchdog ensures the panel recovers from disturbances, and low-power wait modes suit mains-backed battery operation. The 44-QFP (10x10 mm) package offers sufficient I/O for matrix keypads, LEDs, and lock drivers. Existing qualified designs can be sustained from remaining stock; new security hardware should use active MCUs with hardware encryption for modern credential standards.
Recommended
Recommended Products Summary
Engineering reference data for MC908AP32CFBE — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC908AP32ACFBE | MC908AP16CFBE | MC908AP64CFBE | MC908MR32CBE |
|---|---|---|---|---|---|
| Package | 44-QFP (10x10 mm) | 44-QFP (10x10 mm) - same | 44-QFP (10x10 mm) - same | 44-QFP (10x10 mm) - same | 44-QFP (10x10 mm) - same |
| Brand | NXP Semiconductors (Freescale) | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core / Max Clock | HC08 CPU08 / 8 MHz | HC08 CPU08 / high-speed oscillator version | HC08 CPU08 / 8 MHz | HC08 CPU08 / 8 MHz | HC08 CPU08 / 8 MHz |
| FLASH Memory | 32KB | 32KB | 16KB | 60KB-class | 32KB class |
| ADC | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit |
| Supply Voltage | 3.3 V / 5 V (family listing) | 3.3 V / 5 V | 3.3 V / 5 V | 3.3 V / 5 V | 3.3 V / 5 V |
| Special Feature | General-purpose HC08AP with 10-bit ADC | High-speed oscillator version (HC08APxA) | Cost-optimized 16KB FLASH | Extended FLASH for larger code | Motor-control oriented HC08 |
| Lifecycle Status | End of Life | End of Life (HC08AP family) | End of Life (HC08AP family) | End of Life (HC08AP family) | End of Life |
Key Differentiators
- Twice the memory of the reduced variant (vs MC908AP16CFBE)
- High-speed oscillator variant available (vs MC908AP32ACFBE)
- General-purpose focus vs motor-control specialization (vs MC908MR32CBE)
Design Notes
The MC908AP32CFBE is officially End of Life per the NXP product page, which references a discontinuance and replacement product change notice. Do not start new designs on this device. For existing products, execute a last-time-buy covering remaining service life plus 10-20% spares margin, obtain date-code documentation from any broker, and schedule a firmware-level migration to an active MCU family. Confirm the frequency-versus-supply-voltage derating curve in the family datasheet before running at 8MHz on a 3.3V rail.
The 44-QFP (10x10 mm) package uses 0.8mm-pitch leads; design land patterns per the manufacturer datasheet footprint rather than generic PQFP-44 libraries, since HC08AP pin functions (ADC input multiplexing, oscillator, programming pins) vary by family member. Decouple VDD with 0.1uF ceramic placed within 5mm of each supply pin, plus 4.7-10uF bulk near the part. Route the ADC analog inputs away from oscillator and PWM traces; the 10-bit ADC has no differential input capability, so board-level filtering of analog lines is essential for clean conversions.
Estimated: HC08 MCUs of this class typically draw a few mA active at 8MHz and microamp-level current in stop mode, so total system power is dominated by external loads (LEDs, relays, drivers), not the MCU. Size the 5V or 3.3V rail for peripheral load, verify the low-voltage-inhibit (LVI) threshold matches your supply tolerance so the COP/LVI reset does not nuisance-trigger during brownouts, and add series resistance plus clamp protection on I/O that connect to off-board connectors in industrial environments.
Compliance Information
The provided data indicates an environmental quality section exists on the NXP product page but does not state specific RoHS/REACH/lead-free status for this part; consult the NXP Environmental Quality page for MC908AP32CFBE.
