MC908GP32CFBE - 8-Bit HC08 MCU, 32KB Flash, 44-QFP | NXP
MPN: MC908GP32CFBE ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $18.42 | $18.42 |
| 10 | $16.85 | $168.50 |
| 100 | $14.5 | $1,450.00 |
| 500 | $12.2 | $6,100.00 |
| 1,000 | $10.75 | $10,750.00 |
MC908GP32CFBE Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash/ROM), data memory (RAM), and a set of peripherals such as timers, communication controllers, and ADCs into one package. MCUs sit at the lowest tier of the embedded computing hierarchy - below microprocessors and SoCs - and are the workhorse of deeply embedded automotive, industrial, and consumer designs. The HC08 family, in particular, occupies a mature, cost-optimized niche where deterministic 8-bit performance, low power, and small code size are more important than raw MIPS.
Key features of the MC908GP32CFBE include 32 KB of in-application reprogrammable Flash, 512 B of RAM, an 8-channel 8-bit ADC, two 16-bit timers, a CAN 2.0A/B controller (MSCAN08), one SCI (UART) and one SPI interface, plus a computer-operating-properly (COP) watchdog and low-voltage reset. The integrated CAN module is the standout feature that distinguishes this MCU from generic 8-bit parts and historically made it the controller of choice for in-vehicle networking nodes.
The architecture is a Harvard-style CISC core with a 16-bit stack pointer and 16-bit index register, executing HC08 instructions in 1 to 5 bus cycles. The Flash memory is organized as a single 32K x 8 array, allowing byte-level EEPROM emulation if needed. The MSCAN module implements CAN 2.0A/B active/passive with bus-off recovery, dual 32-bit acceptance filters, and listen-only mode.
Typical applications include automotive body controllers, HVAC actuators, instrument cluster nodes, industrial CAN I/O modules, sensor front-ends with on-chip ADC, and any design that needs CAN connectivity plus a low-cost 8-bit core. It is well-suited for brownfield designs that already use the HC08 tool chain.
A key design consideration is that NXP has issued an End-of-Life notice for this part, so new designs should target the HCS08 (S08) family (e.g., S08GB60A, S08QG family) for long-term availability. For legacy board replacements, the MC908GP32CFBE remains functional but should be bought against confirmed distributor stock.
Drop-in alternatives for MC908GP32CFBE — 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 MC908GP32CFBE (same form factor and footprint) — differing in Package, Program Memory Size, Core Architecture, Core Processor, RAM Size.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC908GP32CFBER
✅ Drop-In📋 Reference alternative (not in catalog)
MC908GP32CFUE
✅ Drop-In📋 Reference alternative (not in catalog)
MC908GZ60CFAE
✅ Drop-In✓ In Stock
$9.2 / Unit
View Datasheet →MC908AP64CFBE
✅ Drop-In📋 Reference alternative (not in catalog)
MC908JB8JDWE
✅ Drop-In✓ In Stock
$6.35 / Unit
View Datasheet →MC908GP32CFBE Maximum Ratings & Electrical Characteristics
| Core Architecture | M68HC08 (8-bit CISC) |
| Bus Frequency (max) | 8 MHz |
| Program Memory (Flash) | 32 KB (32K x 8) |
| RAM | 512 B |
| Supply Voltage | 2.0 V to 3.6 V |
| I/O Pins | 33 GPIO |
| ADC | 8-channel, 8-bit |
| Timers | 2 x 16-bit (TIM1, TIM2) |
| Communication | 1 x MSCAN (CAN 2.0A/B), 1 x SCI, 1 x SPI |
| Watchdog | COP (Computer Operating Properly) |
| Package | 44-pin QFP (10 x 10 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 C to +85 C |
| Instruction Set Compatibility | M6805, M146805, M68HC05, M68HC08 |
| RoHS Status | Compliant |
MC908GP32CFBE Pin Configuration
| Pin 1 | IRQ — External interrupt request |
| Pin 2 | PTA0/TCLK — Port A bit 0 / Timer clock input |
| Pin 3 | PTA1 — Port A bit 1 |
| Pin 4 | PTA2 — Port A bit 2 |
| Pin 5 | PTA3 — Port A bit 3 |
| Pin 6 | PTA4 — Port A bit 4 |
| Pin 7 | PTA5 — Port A bit 5 |
| Pin 8 | PTA6 — Port A bit 6 |
| Pin 9 | PTA7 — Port A bit 7 |
| Pin 10 | PTB0/AD0 — Port B bit 0 / ADC channel 0 |
| Pin 11 | PTB1/AD1 — Port B bit 1 / ADC channel 1 |
| Pin 12 | PTB2/AD2 — Port B bit 2 / ADC channel 2 |
| Pin 13 | PTB3/AD3 — Port B bit 3 / ADC channel 3 |
| Pin 14 | PTB4/AD4 — Port B bit 4 / ADC channel 4 |
| Pin 15 | PTB5/AD5 — Port B bit 5 / ADC channel 5 |
| Pin 16 | PTB6/AD6 — Port B bit 6 / ADC channel 6 |
| Pin 17 | PTB7/AD7 — Port B bit 7 / ADC channel 7 |
| Pin 18 | PTC0/MOSI — Port C bit 0 / SPI MOSI |
| Pin 19 | PTC1/MISO — Port C bit 1 / SPI MISO |
| Pin 20 | PTC2/SPSCK — Port C bit 2 / SPI clock |
| Pin 21 | PTC3/SS — Port C bit 3 / SPI slave select |
| Pin 22 | PTC4/TxD — Port C bit 4 / SCI TxD |
| Pin 23 | PTC5/RxD — Port C bit 5 / SCI RxD |
| Pin 24 | PTC6 — Port C bit 6 |
| Pin 25 | PTC7 — Port C bit 7 |
| Pin 26 | PTD0/CANtx — Port D bit 0 / CAN transmit |
| Pin 27 | PTD1/CANrx — Port D bit 1 / CAN receive |
| Pin 28 | PTD2 — Port D bit 2 |
| Pin 29 | PTD3 — Port D bit 3 |
| Pin 30 | PTD4 — Port D bit 4 |
| Pin 31 | PTD5 — Port D bit 5 |
| Pin 32 | VDD — Positive supply (2.0-3.6 V) |
| Pin 33 | VSS — Ground |
| Pin 34 | OSC1 — Oscillator input |
| Pin 35 | OSC2 — Oscillator output |
| Pin 36 | RST — Reset input (active low) |
| Pin 37 | BKGD — Background debug mode |
| Pin 38 | PTD6 — Port D bit 6 |
| Pin 39 | PTD7 — Port D bit 7 |
| Pin 40 | PTE0 — Port E bit 0 |
| Pin 41 | PTE1 — Port E bit 1 |
| Pin 42 | PTE2 — Port E bit 2 |
| Pin 43 | PTE3 — Port E bit 3 |
| Pin 44 | PTE4 — Port E bit 4 |
Typical Applications
MC908GP32CFBE is suitable for 6 applications: Automotive Body Control Modules, HVAC and Climate Control, Industrial CAN I/O Modules, Instrument Cluster CAN Nodes, Battery-Powered Sensor Front-Ends, Brownfield Industrial Replacement Designs.
Automotive Body Control Modules
The MC908GP32CFBE's integrated MSCAN08 module and 33 GPIO make it a strong fit for automotive body controllers that drive mirrors, lights, door locks, and seat positioners. At 8 MHz bus frequency it handles CAN 2.0A/B messaging with deterministic latency for sensor fusion nodes on the body CAN bus. The 32 KB Flash comfortably stores BCM application code plus calibration tables, while the 8-channel 8-bit ADC reads thermistor and switch inputs without external conversion hardware.
Recommended
HVAC and Climate Control
The MCU's 8-channel ADC, two 16-bit timers, and PWM-capable I/O lines suit climate-control actuators and blower motor controllers. It reads temperature sensors via ADC and drives TRIAC or MOSFET gate drivers through its timers, while the SCI peripheral talks to the panel control board at 9600-115200 baud. With 32 KB Flash it holds full PID loops and lookup tables for linearizing thermistor curves.
Recommended
Industrial CAN I/O Modules
Decentralized industrial I/O slices benefit from the MCU's CAN interface and 33 GPIO, replacing larger PLC racks in CAN-based fieldbus architectures like CANopen and DeviceNet. The 32 KB Flash hosts CANopen stack stubs or custom protocols, while the SCI/SPI peripherals add local RS-485 or sensor expansion. Its 2.0-3.6 V supply range tolerates 24 V industrial rail conditioning down to logic levels.
Recommended
Instrument Cluster CAN Nodes
Small CAN-attached cluster segments - telltale indicators, gauge stepper drivers, and warning lamps - can be built around the MC908GP32CFBE without adding an external controller. The 8-bit ADC reads panel illumination levels, timers drive gauge needles, and the integrated CAN node reports status to the central cluster processor. Its low BOM cost and small 44-QFP footprint fit behind tight cluster bezels.
Recommended
Battery-Powered Sensor Front-Ends
The MCU's 2.0-3.6 V wide supply range and HC08 low-power modes suit battery-backed or energy-harvesting sensor front-ends. It can sleep between CAN transmissions, waking on a timer interrupt to take an ADC reading and report back on the CAN bus. The 32 KB Flash supports on-chip EEPROM emulation, eliminating an external memory part for parameter storage.
Recommended
Brownfield Industrial Replacement Designs
For designs originally built around the M68HC05/M68HC08 ecosystem, the MC908GP32CFBE offers direct code compatibility and the same peripheral register model, easing legacy code migration. Existing assembly routines and C libraries port without rewrite, while the integrated CAN module modernizes older designs that previously required a stand-alone CAN controller. This makes the part useful for repair and lifecycle extension of field-deployed equipment.
Recommended
Recommended Products Summary
Engineering reference data for MC908GP32CFBE — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC908GP32CFBER | MC908GP32CFUE | MC908GZ60CFAE | MC908AP64CFBE | MC908JB8JDWE |
|---|---|---|---|---|---|---|
| Package | 44-QFP (10x10) | 44-QFP (10x10) - same | 44-QFP (10x10) - same | 44-QFP (10x10) - same | 44-QFP (10x10) - same | 44-QFP (10x10) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Flash Memory | 32 KB | 32 KB | 32 KB | 60 KB | 64 KB | 8 KB |
| RAM | 512 B | 512 B | 512 B | 2 KB | 2 KB | 256 B |
| CAN Module | MSCAN08 (CAN 2.0A/B) | MSCAN08 | MSCAN08 | MSCAN08 | MSCAN08 | No CAN (USB instead) |
| USB Module | None | None | None | None | None | USB 2.0 Full-Speed |
| Bus Frequency | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 6 MHz |
| Lifecycle Status | EOL | EOL | EOL | EOL | EOL | EOL |
Key Differentiators
- Pin-compatible upgrade path with more Flash (vs MC908GZ60CFAE)
- Higher-density Flash for larger code bases (vs MC908AP64CFBE)
- Integrated USB instead of CAN (vs MC908JB8JDWE)
Design Notes
The MC908GP32CFBE requires a regulated 2.0-3.6 V supply on VDD (pin 32) with VSS (pin 33) as ground. Decouple VDD with a 100 nF ceramic capacitor placed within 5 mm of the pin to suppress switching transients during Flash programming. For battery-backed designs, hold VDD above 2.0 V during Flash write cycles or programming will abort and may corrupt the row.
Route the oscillator pins (OSC1, OSC2) as a short differential pair with a ground guard trace; keep them away from switching nodes like the SCI/UART lines and CAN traces. Place the crystal or resonator within 5 mm of OSC1/OSC2 to minimize parasitic capacitance. The 44-QFP at 10x10 mm body has a center thermal pad on some revisions - confirm via datasheet thermal section whether your variant requires a thermal relief pattern.
Do not assume the MC908GP32CFBE is the same as the HCS08/S08 family - the part is HC08 (legacy) and uses the older HC08 instruction set and registers. Migration to S08 requires updating the tool chain, linker scripts, and register definitions. Also note that the BKGD pin (background debug) is required for in-circuit programming - do not connect it directly to ground or VDD; leave it accessible for the debugger.
Compliance Information
RoHS and lead-free per NXP product page and DigiKey/Mouser listings. AEC-Q100 not qualified for the standard GP32; automotive AEC-Q100 variants exist under different order codes (e.g., MC908AP16ACFUE).
