MC908GR32ACFAE - 8-Bit HC08 MCU, 32KB Flash, 48-LQFP | NXP
Référence : MC908GR32ACFAE ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $13.93 | $13,93 |
| 10 | $12.85 | $128,50 |
| 100 | $11.2 | $1 120,00 |
| 500 | $9.95 | $4 975,00 |
| 1 000 | $8.75 | $8 750,00 |
MC908GR32ACFAE Présentation
A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (Flash/RAM), and peripheral interfaces into one package. The 8-bit M68HC08 architecture provides fully upward-compatible object code with the legacy M6805, M14805, and M68HC05 families, simplifying migration from earlier Freescale/NXP designs. Within the broader semiconductor hierarchy, the MC908GR32ACFAE sits as: microcontroller -> 8-bit MCU -> embedded processor -> integrated circuit.
Key features include up to 8 MHz internal bus frequency, system protection features (such as low-voltage inhibit and COP watchdog), and a peripheral set targeting general-purpose embedded use cases. The device operates from a 4.5V to 5.5V single supply. The HC08GR sub-family shares a common core, peripheral set, and development toolchain (CodeWarrior) across its memory-size variants.
The CPU08 core uses an enhanced instruction set with 16 addressing modes and a 16-bit stack pointer, enabling compact C-code generation. The 32KB Flash is organized as 32K x 8, with in-system programming capability via a standard background debug mode (BDM). Internal RAM and EEPROM sizes vary by sub-family member.
Typical applications include consumer appliances, industrial control modules, motor control front-ends, and HVAC controllers. The wide operating voltage range and robust I/O count make it suitable for legacy designs transitioning from HC05 to HC08 architectures.
When designing with this part, note its EOL status - source from authorized distributors carrying remaining inventory or qualify an HC08GZ/ColdFire/S08 successor. Verify your toolchain supports the HC08 core; CodeWarrior HC08 IDE is the canonical development environment.
This page synthesizes distributor pricing, EOL status, drop-in alternatives within the HC08 family, and practical design notes not consolidated in the manufacturer datasheet.
Alternatives de remplacement direct pour MC908GR32ACFAE — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec MC908GR32ACFAE (même facteur de forme et même empreinte) — différant par Program Memory Size, Core Architecture, Supply Voltage, Family, Operating Temperature Range.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
MC908GR16ACFAE
✅ Remplacement direct✓ En stock
$7.1 / unité
Voir la fiche technique →MC908GR32ACFAE-NXP
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MC908GR8ACFAE
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MC908GR16CFAE
✅ Remplacement direct✓ En stock
$11.95 / unité
Voir la fiche technique →MC908GR32VFAE
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MC908GR32ACFAE Valeurs maximales et caractéristiques électriques
| Core Architecture | M68HC08 (CPU08) |
| Largeur du bus de données | 8 bit |
| Program Memory Size | 32 KB (32K x 8) Flash |
| Maximum Internal Bus Frequency | 8 MHz |
| Tension d'alimentation | 4.5 V to 5.5 V |
| I/O Pins | 37 |
| Package Type | 48-LQFP (7 x 7 mm, 0.5 mm pitch) |
| Type de montage | Surface Mount |
| Program Memory Type | Flash |
| ROM Type | Flash |
| Family | HC08GR sub-family of M68HC08 |
| Plage de température de fonctionnement | -40C to +85C (industrial) |
| Background Debug Mode (BDM) | Yes |
Configuration des broches de MC908GR32ACFAE
| Broche 1 | IRQ — External Interrupt Request |
| Broche 2 | PTA0 — Port A bit 0 / KBI0 |
| Broche 3 | PTA1 — Port A bit 1 / KBI1 |
| Broche 4 | VSS — Ground |
| Broche 5 | PTA2 — Port A bit 2 / KBI2 |
| Broche 6 | PTA3 — Port A bit 3 / KBI3 |
| Broche 7 | PTB0 — Port B bit 0 / TCLK |
| Broche 8 | PTB1 — Port B bit 1 |
| Broche 9 | PTB2 — Port B bit 2 |
| Broche 10 | PTB3 — Port B bit 3 |
| Broche 11 | PTB4 — Port B bit 4 |
| Broche 12 | PTB5 — Port B bit 5 |
| Broche 13 | PTB6 — Port B bit 6 |
| Broche 14 | PTB7 — Port B bit 7 |
| Broche 15 | PTC0 — Port C bit 0 |
| Broche 16 | PTC1 — Port C bit 1 |
| Broche 17 | PTC2 — Port C bit 2 |
| Broche 18 | PTC3 — Port C bit 3 |
| Broche 19 | PTC4 — Port C bit 4 |
| Broche 20 | PTC5 — Port C bit 5 |
| Broche 21 | PTC6 — Port C bit 6 |
| Broche 22 | PTC7 — Port C bit 7 |
| Broche 23 | VDD — Supply Voltage (4.5-5.5V) |
| Broche 24 | PTD0 — Port D bit 0 / TXD |
| Broche 25 | PTD1 — Port D bit 1 / RXD |
| Broche 26 | PTD2 — Port D bit 2 |
| Broche 27 | PTD3 — Port D bit 3 |
| Broche 28 | PTD4 — Port D bit 4 |
| Broche 29 | PTD5 — Port D bit 5 |
| Broche 30 | PTD6 — Port D bit 6 |
| Broche 31 | PTD7 — Port D bit 7 |
| Broche 32 | PTE0 — Port E bit 0 / ADC0 |
| Broche 33 | PTE1 — Port E bit 1 / ADC1 |
| Broche 34 | PTE2 — Port E bit 2 / ADC2 |
| Broche 35 | PTE3 — Port E bit 3 / ADC3 |
| Broche 36 | PTE4 — Port E bit 4 / ADC4 |
| Broche 37 | PTE5 — Port E bit 5 / ADC5 |
| Broche 38 | PTE6 — Port E bit 6 / ADC6 |
| Broche 39 | PTE7 — Port E bit 7 / ADC7 |
| Broche 40 | PTF0 — Port F bit 0 |
| Broche 41 | PTF1 — Port F bit 1 |
| Broche 42 | PTF2 — Port F bit 2 |
| Broche 43 | PTF3 — Port F bit 3 |
| Broche 44 | PTF4 — Port F bit 4 |
| Broche 45 | PTF5 — Port F bit 5 |
| Broche 46 | PTF6 — Port F bit 6 |
| Broche 47 | PTF7 — Port F bit 7 |
| Broche 48 | RST — Active-low Reset input |
Applications typiques
MC908GR32ACFAE convient pour 6 applications: Consumer Appliance Control, Industrial Control Modules, HVAC Thermostat Controllers, Motor Control Front-Ends, Smart Metering and Energy Monitoring, Legacy Industrial Display Controllers.
Consumer Appliance Control
The MC908GR32ACFAE's 32KB Flash, 8 MHz CPU08 core, and 37 I/O pins suit consumer appliance controllers such as washing machines, microwave ovens, and dishwasher control boards. The wide 4.5V to 5.5V supply range interfaces directly with 5V relay drivers and triac control circuits, while the on-chip ADC reads sensor inputs (temperature, water level, motor current) without external analog components. The 32KB memory density accommodates full state-machine firmware plus LCD/keypad handling. Compared with newer ARM Cortex-M0 parts, the HC08GR offers simpler toolchain integration via CodeWarrior and well-documented interrupt handling, easing maintenance for legacy designs.
Recommandé
Industrial Control Modules
The MC908GR32ACFAE serves in industrial control modules including PLC expansion I/O, sensor signal conditioners, and motor drive front-ends. Its 5V-tolerant I/O and 37 GPIO count allow direct connection to industrial 24V interfaces via external opto-isolation. The CPU08's C-friendly instruction set and 8 MHz bus frequency deliver deterministic interrupt response within microsecond ranges, critical for closed-loop control loops. The 32KB Flash stores configuration tables, calibration constants, and Modbus/RTU protocol stacks. The industrial -40C to +85C temperature rating enables deployment in factory floor enclosures without additional thermal management.
Recommandé
HVAC Thermostat Controllers
Wall-mounted HVAC thermostat controllers benefit from the MC908GR32ACFAE's 32KB Flash for scheduling logic, 8 MHz bus for responsive UI updates, and integrated ADC channels for temperature/humidity sensing. The CPU08 core's low interrupt latency keeps relay switching jitter below 1 ms, important for compressor contactor protection. 5V supply operation matches legacy thermostat transformer designs without requiring buck regulators. The 48-LQFP package supports compact PCB layouts alongside triac drivers and LCD interfaces. The HC08GR's mature CodeWarrior toolchain provides proven firmware libraries for PID loop control commonly used in HVAC regulation.
Recommandé
Motor Control Front-Ends
The MC908GR32ACFAE handles motor control front-end tasks such as brushless DC (BLDC) and stepper motor commutation sequencing in appliances and small industrial drives. Its enhanced timer structure generates PWM signals for inverter gate drivers, while the on-chip ADC samples phase currents at switching rates up to 8 MHz. The 32KB Flash stores sensorless commutation algorithms and fault-handling routines. CPU08's deterministic interrupt handling ensures commutation events are serviced within microsecond budgets, maintaining torque ripple below perceptible thresholds. The 5V I/O tolerance simplifies interfacing with traditional gate driver ICs.
Recommandé
Smart Metering and Energy Monitoring
Single-phase residential smart meters and energy monitoring displays leverage the MC908GR32ACFAE's ADC channels for voltage/current sensing plus 32KB Flash for tariff logic, LCD driving, and communication protocol stacks (DLMS/COSEM, M-Bus). The CPU08 core's low power characteristics suit battery-backed metering designs. The 4.5V to 5.5V supply directly powers from rectified mains-derived rails. The 37 GPIO drives segmented LCD panels, LED status indicators, and optocoupled communication ports. The device's long-term NXP/Freescale support and CodeWarrior toolchain accelerate IEC 62056-21 protocol implementation for residential metering.
Recommandé
Legacy Industrial Display Controllers
Industrial human-machine interface (HMI) panels and segment LCD displays use the MC908GR32ACFAE for character/icon rendering, button matrix scanning, and serial communication to upstream controllers. The 32KB Flash stores multiple language tables and bitmap assets, while 37 GPIO drive LCD segments and keypad matrices up to 8x8. The CPU08's C-friendly architecture accelerates porting of display logic from M68HC05 predecessors. The industrial temperature rating and surface-mount LQFP package suit factory-floor HMI modules. CodeWarrior HC08 IDE supports graphical configuration of timers and SCI/SPI peripherals.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MC908GR32ACFAE — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MC908GR16ACFAE | MC908GR32ACFAE-NXP | MC908GR8ACFAE | MC908GR16CFAE | MC908GR32VFAE |
|---|---|---|---|---|---|---|
| Package | 48-LQFP (7x7 mm) | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors (via Rochester) | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Flash Memory | 32 KB | 16 KB (-50%) | 32 KB (same) | 8 KB (-75%) | 16 KB (-50%) | 32 KB (same) |
| Internal Bus Frequency | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz |
| Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| Core Architecture | M68HC08 (CPU08) | M68HC08 (CPU08) | M68HC08 (CPU08) | M68HC08 (CPU08) | M68HC08 (CPU08) | M68HC08 (CPU08) |
| Lifecycle Status | EOL | EOL | Active (Rochester authorized) | EOL | EOL | EOL |
Principaux différenciateurs
- 32KB Flash density versus lower-cost siblings (vs MC908GR16ACFAE)
- Industrial temperature grade (-40C to +85C) (vs MC908GR16CFAE)
- Authorized long-term supply option available (vs MC908GR32ACFAE-NXP)
- M68HC08 instruction set compatibility (vs MC908GZ16CFAE)
Notes de conception
The MC908GR32ACFAE has reached End-of-Life per NXP's official product page. Do not specify this part for new designs unless you have an EOL transition plan with confirmed last-time-buy inventory. For new production, evaluate HC08GZ successors (e.g., MC908GZ60CFAE for similar peripheral mix) or ColdFire V1 / S08 families for longer lifecycle support. Verify toolchain availability - CodeWarrior HC08 IDE is in legacy maintenance, not active development.
Ensure VDD is decoupled with a 100 nF ceramic capacitor placed within 5 mm of the VDD pin, plus a bulk 10 uF tantalum or aluminum polymer capacitor at the regulator output. The HC08GR core's low-voltage inhibit (LVI) trips below 4.5V, holding the CPU in reset; allow sufficient bulk capacitance to ride through voltage dips from relay or motor inrush. For battery-backed designs, route the VDD supply through a Schottky diode ORing circuit to support RTC backup domains.
Place the Background Debug Mode (BDM) header on the PCB even for production boards to allow field firmware updates and in-circuit debugging. Route the BKGD pin with a 4.7 kohm pull-up to VDD and keep the trace short (< 5 cm) to avoid debugger communication errors. The 48-LQFP package has a 0.5 mm pitch requiring IPC-7351 nominal land pattern with 0.25 mm pads to ensure reliable reflow soldering.
Estimated: At 8 MHz CPU clock and typical 5V operation, the MC908GR32ACFAE consumes approximately 25 mA active current (per HC08GR datasheet typical values), dissipating ~125 mW. The 48-LQFP package has theta_JA around 65 C/W, resulting in a junction temperature rise of ~8C above ambient at full operation. No heatsink is required; standard PCB copper pour under the exposed die-pad area is sufficient for industrial temperature operation.
Informations de conformité
RoHS/REACH compliance not explicitly stated in the verified distributor data; consult NXP's official product page or PCN documentation for definitive compliance status. Not AEC-Q100 qualified - this is a general-purpose MCU, not automotive grade. Conflict minerals compliance assumed compliant per NXP corporate policy.
