MC908GR32AVFAE - 8-bit HC08 MCU, 32KB Flash, 8MHz | NXP
MPN: MC908GR32AVFAE ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.43 | $8.43 |
| 10 | $7.8 | $78.00 |
| 100 | $7.1 | $710.00 |
| 500 | $6.6 | $3,300.00 |
| 1,000 | $6.1 | $6,100.00 |
MC908GR32AVFAE Overview
An 8-bit microcontroller (MCU) is an integrated circuit that combines a processor core, memory, and peripherals on a single chip, executing embedded control programs in devices ranging from appliances to automotive modules. The HC08 family sits within the broader microcontroller hierarchy: HC08 core -> 8-bit MCU -> embedded microcontroller -> semiconductor. HC08 devices are known for low-cost, low-power operation and C-efficient instruction sets.
Key features of the MC908GR32AVFAE include 37 general-purpose I/O lines, SCI and SPI serial connectivity for UART and peripheral communication, and integrated peripherals such as LVD (low-voltage detection), POR (power-on reset), and PWM. The 32KB Flash supports in-circuit reprogramming, and the device operates from a 3.3V or 5V supply, easing migration between legacy 5V systems and modern 3.3V designs.
The HC08 core executes CISC instructions at up to 8MHz bus speed, providing adequate throughput for control loops, metering, motor assist, and human-interface tasks. The flash memory and RAM sizing targets mid-range applications that outgrow 8KB-16KB parts but do not require 16-bit or 32-bit cores.
Typical applications include industrial control panels, battery chargers, appliance control, automotive body electronics, and LED lighting control, where the PWM, SCI, and SPI peripherals handle actuator drive and serial communication.
Design consideration: this part is officially listed as Obsolete by NXP; new designs should select an active MCU, and existing designs should secure stock or qualify a drop-in family alternative before the last-time-buy window closes.
This page synthesizes distributor pricing, drop-in family alternatives, and sourcing guidance not consolidated in the manufacturer datasheet.
Drop-in alternatives for MC908GR32AVFAE — 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 MC908GR32AVFAE (same form factor and footprint) — differing in Program Memory Size, Package, Supply Voltage, Core Processor, RAM Size.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC908GR32ACFAE
✅ Drop-In✓ In Stock
$8.75 / Unit
View Datasheet →MC908GR16AVFAE
✅ Drop-In📋 Reference alternative (not in catalog)
MC908GR8AVFAE
✅ Drop-In📋 Reference alternative (not in catalog)
MC908GZ32MFAE
✅ Drop-In✓ In Stock
$8.95 / Unit
View Datasheet →MC908GR32AVFAE Maximum Ratings & Electrical Characteristics
| Core Processor | HC08 (8-bit CISC) |
| Core Size | 8-Bit |
| Maximum Clock Speed | 8 MHz |
| Program Memory Size | 32 KB (32K x 8) |
| Program Memory Type | FLASH |
| RAM Size | 1.5K x 8 |
| EEPROM Size | - |
| Number of I/O | 37 |
| Connectivity | SCI, SPI |
| Peripherals | LVD, POR, PWM |
| Supply Voltage | 3.3 V / 5 V |
| Package | 48-LQFP (7x7 mm) |
| Mounting Type | Surface Mount |
| Packaging | Tray |
| Part Status | Obsolete |
| Series | HC08 |
| Grade | Automotive (AE suffix) |
MC908GR32AVFAE 48-lqfp (7x7 mm) Pin Configuration Guide
Pin configuration for MC908GR32AVFAE (48-lqfp (7x7 mm) 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 MC908GR32AVFAE.
Refer to the datasheet for full pin configuration.
Typical Applications
MC908GR32AVFAE is suitable for 6 applications: Automotive Body Control Modules, Industrial Control Panels, Battery Chargers and Power Management, Appliance Control, LED Lighting Control, Sensor Signal Acquisition Nodes.
Automotive Body Control Modules
The MC908GR32AVFAE's AE automotive temperature-grade suffix and 32KB Flash made it a mainstay in body electronics such as door modules, seat control, and lighting controllers. The 37 I/O lines drive relays, lamps, and switches directly, while SCI handles LIN-style diagnostic links and PWM outputs drive lamp dimming and motor speed control. The integrated LVD and POR guarantee orderly startup and shutdown during crank transients, a critical requirement in 12V vehicle networks. Since the part is obsolete, existing automotive production lines should secure stock or qualify an active NXP automotive MCU with equivalent I/O count and flash density.
Recommended
Industrial Control Panels
Industrial control panels benefit from the MC908GR32AVFAE's 5V noise-immune operation, SPI port for peripherals such as ADCs and display drivers, and SCI port for RS-485 or RS-232 communication with supervisory systems. The 32KB Flash accommodates state-machine logic, communication stacks, and calibration tables without external memory. PWM outputs drive heater, fan, or actuator control at low cost. The 3.3V/5V dual-supply capability simplifies retrofit into existing 5V panel designs while permitting 3.3V peripherals. Designers must account for the obsolete status by sizing last-time-buy quantities against the expected panel service life.
Recommended
Battery Chargers and Power Management
Smart battery chargers use the MC908GR32AVFAE's PWM peripheral to control charging current via buck or buck-boost stages, while the SCI port reports charge status to host systems. The 8MHz HC08 core executes charge-control algorithms (CC/CV, temperature cut-off) with adequate timing resolution. LVD ensures safe MCU behavior as battery or supply voltage dips, and the 3.3V/5V operating range supports both portable and mains-powered charger architectures. The 37 I/O lines accommodate LED status indicators, key inputs, and thermistor channels. Verify flash-image sizing, as charger firmware with communication stacks commonly approaches 16KB, leaving comfortable margin in 32KB.
Recommended
Appliance Control
Home appliances such as washing machines, dishwashers, and microwave ovens employ the MC908GR32AVFAE for user-interface scanning (keys and LED/segment displays), motor assistance timing, and sensor monitoring. The large 37-pin GPIO count covers a full button matrix and display segment drive without expansion ICs, reducing system cost. The 32KB Flash stores multi-language menus and cycle tables, while the LVD/POR peripherals ensure reliable reset behavior in electrically noisy kitchen environments. The 5V operation tolerates the supply transients typical of large appliances. As the part is discontinued, appliance service organizations should plan component banking for long-term field repair.
Recommended
LED Lighting Control
Dimmable LED luminaires and drivers use the MC908GR32AVFAE's PWM outputs to generate high-resolution dimming waveforms and the SCI port to receive DMX-style or custom serial dimming commands. The 8MHz bus speed supports PWM frequencies above audible range with adequate duty-cycle resolution for flicker-free output. The 5V I/O drives MOSFET gate circuitry directly through a driver stage, and the LVD protects against misbehavior during brownouts. Firmware for multi-channel dimming curves typically consumes well under 32KB, allowing future feature additions. Because supply is ending, new lighting platforms should target NXP's currently supported MCU families with equivalent PWM capability.
Recommended
Sensor Signal Acquisition Nodes
Distributed sensor nodes pair the MC908GR32AVFAE's SPI port with external precision ADCs to digitize temperature, pressure, and load-cell signals, then transmit readings over the SCI link to a host controller. The 1.5KB RAM supports local filtering and linearization tables, while the 32KB Flash stores multi-point calibration data. The 3.3V operation suits modern low-power analog front ends, and 5V compatibility serves legacy 5V transducers. Wide ambient-grade availability (AE variant) supports outdoor and industrial installations. For high-resolution acquisition (12-16 bit) applications, combine with SPI ADCs from the Site ADC family such as the TLV2545 or MAX187.
Recommended
Recommended Products Summary
Engineering reference data for MC908GR32AVFAE — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC908GR32ACFAE | MC908GR16AVFAE | MC908GR8AVFAE | MC908GZ32MFAE |
|---|---|---|---|---|---|
| Package | 48-LQFP (7x7 mm) | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP - same body, verify pinout |
| Brand | NXP Semiconductors (Freescale) | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core | HC08 8-bit CISC | HC08 8-bit CISC | HC08 8-bit CISC | HC08 8-bit CISC | HC08 8-bit CISC |
| Program Memory (Flash) | 32 KB | 32 KB | 16 KB | 8 KB | 32 KB |
| Max Speed | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz |
| Connectivity / Peripherals | SCI, SPI; LVD, POR, PWM | SCI, SPI; LVD, POR, PWM | SCI, SPI; LVD, POR, PWM | SCI, SPI; LVD, POR, PWM | SCI, SPI; LVD, POR, PWM |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
Key Differentiators
- Full 32KB Flash density in the GR 48-LQFP family (vs MC908GR16AVFAE)
- Automotive/extended temperature AE grade (vs MC908GR32ACFAE)
- Dual 3.3V/5V operation (vs MC908GR8AVFAE)
Design Notes
The MC908GR32AVFAE is officially Obsolete. Do not use it in new designs: confirm your production lifetime requirement and place a last-time-buy sized to end-of-service plus field-repair spares, or qualify MC908GR32ACFAE (standard grade, same die/package) or migrate to an active NXP MCU. When buying from secondary-market brokers, demand date-code and authenticity verification, since obsolete MCUs are a frequent counterfeit target.
The device operates from a 3.3V or 5V supply; use the integrated LVD threshold appropriate to your operating voltage to guarantee code integrity during brownouts. Decouple VDD with 0.1uF ceramic plus 4.7-10uF bulk capacitance per HC08 hardware design practice. Ensure RESET and IRQ lines have defined pull-ups, and rely on POR for controlled startup. For flash reprogramming in-system, maintain supply within the datasheet programming voltage window.
The 48-LQFP (7x7 mm, 0.5 mm pitch) footprint requires fine-pitch soldering; design pads per the datasheet land-pattern recommendation and use adequate thermal relief on power pins. Route the oscillator crystal with short traces and ground guard. Keep SPI clock lines short and away from the crystal circuit to avoid glitching during 8MHz bus operation. When substituting GR-family variants, the footprint is unchanged, so no PCB respin is needed - only re-verify firmware fit.
Compliance Information
Compliance data was not present in the provided verified web data; consult the NXP product page or datasheet for the MC908GR32 series RoHS/REACH status.