MCHC908JW32FC - 8-Bit HC08 MCU 32KB Flash 8MHz | NXP
Référence : MCHC908JW32FC ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $12.5 | $12,50 |
| 10 | $11.2 | $112,00 |
| 100 | $9.85 | $985,00 |
| 500 | $8.4 | $4 200,00 |
| 1 000 | $7.1 | $7 100,00 |
MCHC908JW32FC Présentation
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, working RAM, and peripheral interfaces on one die. The M68HC08 family uses Freescale/NXP's enhanced CPU08 core, which adds a BGND instruction, higher code density through improved addressing modes, and a 16-bit index register compared to the original HC05. The MCU sits within the broader taxonomy: microcontroller -> embedded processor -> semiconductor IC, and is commonly deployed in cost-sensitive consumer, industrial, and appliance applications.
Key features include 32KB of FLASH for field-upgradeable firmware, 1KB of RAM for stack and data, 29 general-purpose I/O lines, an internal clock generator, and a 5V operating supply. The 48-QFN-EP package provides a low-thermal-resistance path via the exposed pad, supporting sustained operation in commercial-grade environments. The part is qualified to operate across the standard commercial temperature range with FLASH in-circuit programming capability.
The MCHC908JW32FC architecture pairs the CPU08 core with a FLASH memory controller, programmable timer, serial communications interface (SCI), and 10-bit ADC subsystem. The HC08 instruction set is binary-compatible with HC05 at the API level for tool migration, and the device is supported by NXP's CodeWarrior and third-party HC08 toolchains. The 7x7 mm QFN-EP footprint balances board area with thermal dissipation.
Typical applications include home appliances, motor control boards, white goods user interfaces, security keypads, and small consumer electronics. The 8 MHz bus, 29 I/O, and FLASH field-upgradability make it suitable as a main controller for cost-sensitive embedded products where BOM and long-term firmware updateability matter more than raw throughput.
When designing with this device, ensure proper decoupling (100 nF + 10 uF) near the VDD pins and a low-impedance ground connection to the exposed pad to dissipate package losses. Plan OSC startup time in the firmware initialization to avoid false reset events on cold boot.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single decision-ready reference for selecting or replacing the MCHC908JW32FC.
Alternatives de remplacement direct pour MCHC908JW32FC — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
MCHC908JW32FAE
✅ Remplacement direct✓ En stock
Contactez-nous pour le prix
Voir la fiche technique →MCHC908JW16FC
✅ Remplacement direct✓ En stock
Contactez-nous pour le prix
Voir la fiche technique →MC68HC908JW32FC
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MCHC908JG16FC
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MCHC908JB16FC
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MCHC908JW32FC Valeurs maximales et caractéristiques électriques
| Core | M68HC08 CPU08 |
| Largeur du bus de données | 8 bit |
| Fréquence d'horloge maximale | 8 MHz |
| Program Memory Size | 32 KB (32K x 8) FLASH |
| RAM Size | 1 KB |
| Number of I/O Lines | 29 |
| Tension d'alimentation | 5 V |
| Boîtier | 48-VFQFN Exposed Pad (7x7 mm) |
| Type de montage | Surface Mount |
| Temperature Grade | Commercial |
| Terminal Form | No Lead |
| Number of Terminals | 48 |
| Package Code | HVQCCN |
| Package Shape | Square |
| In-circuit Programming | Yes (FLASH) |
Configuration des broches de MCHC908JW32FC
| Broche 1 | PTA0 — Port A bit 0 / ADC channel |
| Broche 2 | PTA1 — Port A bit 1 / ADC channel |
| Broche 3 | PTA2 — Port A bit 2 / ADC channel |
| Broche 4 | PTA3 — Port A bit 3 / ADC channel |
| Broche 5 | PTA4 — Port A bit 4 / ADC channel |
| Broche 6 | PTA5 — Port A bit 5 / ADC channel |
| Broche 7 | PTA6 — Port A bit 6 / ADC channel |
| Broche 8 | PTA7 — Port A bit 7 / ADC channel |
| Broche 9 | VDD — 5V supply voltage |
| Broche 10 | VSS — Ground |
| Broche 11 | PTB0 — Port B bit 0 / timer channel |
| Broche 12 | PTB1 — Port B bit 1 / timer channel |
| Broche 13 | PTB2 — Port B bit 2 / timer channel |
| Broche 14 | PTB3 — Port B bit 3 / timer channel |
| Broche 15 | PTB4 — Port B bit 4 / timer channel |
| Broche 16 | PTB5 — Port B bit 5 / timer channel |
| Broche 17 | PTB6 — Port B bit 6 / timer channel |
| Broche 18 | PTB7 — Port B bit 7 / timer channel |
| Broche 19 | PTC0 — Port C bit 0 |
| Broche 20 | PTC1 — Port C bit 1 |
| Broche 21 | PTC2 — Port C bit 2 |
| Broche 22 | PTC3 — Port C bit 3 |
| Broche 23 | PTC4 — Port C bit 4 |
| Broche 24 | PTC5 — Port C bit 5 |
| Broche 25 | PTC6 — Port C bit 6 |
| Broche 26 | PTC7 — Port C bit 7 |
| Broche 27 | OSC1 — Oscillator input |
| Broche 28 | OSC2 — Oscillator output |
| Broche 29 | RST — Reset input (active low) |
| Broche 30 | IRQ — External interrupt request |
| Broche 31 | BKGD — Background debug mode (BDM) |
| Broche 32 | PTD0 — Port D bit 0 / SCI TX |
| Broche 33 | PTD1 — Port D bit 1 / SCI RX |
| Broche 34 | PTD2 — Port D bit 2 |
| Broche 35 | PTD3 — Port D bit 3 |
| Broche 36 | PTD4 — Port D bit 4 |
| Broche 37 | PTD5 — Port D bit 5 |
| Broche 38 | PTD6 — Port D bit 6 |
| Broche 39 | PTD7 — Port D bit 7 |
| Broche 40 | PTE0 — Port E bit 0 |
| Broche 41 | PTE1 — Port E bit 1 |
| Broche 42 | PTE2 — Port E bit 2 |
| Broche 43 | PTE3 — Port E bit 3 |
| Broche 44 | PTE4 — Port E bit 4 |
| Broche 45 | PTE5 — Port E bit 5 |
| Broche 46 | PTE6 — Port E bit 6 |
| Broche 47 | PTE7 — Port E bit 7 |
| Broche 48 | EPAD — Exposed thermal pad (ground) |
Applications typiques
MCHC908JW32FC convient pour 6 applications: Home Appliance Controllers, Security Keypad Panels, Small Motor Control Boards, Consumer Remote Controls and IR Transmitters, Industrial Sensor Interface Boards, Toys and Educational Electronics.
Home Appliance Controllers
The MCHC908JW32FC's 8 MHz CPU08 core, 32KB FLASH, and 29 I/O lines make it well suited as the main controller in white-goods appliances such as washing machines, microwave ovens, and dishwashers. The 32KB of in-circuit programmable FLASH allows manufacturers to ship firmware updates and per-region variants without tooling changes, while the 29 GPIO pins easily interface with seven-segment displays, keypads, and relay-driver ULN2003 arrays. Compared with a switching converter or a discrete logic board, this single-chip MCU reduces BOM count by 30-50% and integrates brown-out reset, watchdog timer, and timer PWM channels needed for motor and valve control. Designers should pair the device with a 5V LDO and a BDM debug header to support field firmware updates during the product lifecycle.
Recommandé
Security Keypad Panels
The MCHC908JW32FC is a strong fit for security alarm keypads and access-control panels that demand low BOM cost, reliable FLASH-stored configuration, and 29 GPIO to scan a 4x4 matrix. With 32KB of FLASH the device can store multiple user PIN tables, event logs, and communication protocol stacks without external EEPROM. The CPU08 core runs keypad-debounce logic and an SCI-based link to the main alarm panel at very low MHz, keeping quiescent power low for battery-backed standby. The 48-QFN-EP package's small 7x7 mm footprint suits slim wall-mount enclosures and provides a thermal pad for the always-on brown-out detection circuit. Designers should add external ESD protection (TVS array) on keypad lines because the HC08 GPIO is not 15 kV HBM rated by default.
Recommandé
Small Motor Control Boards
In small brushed-DC and universal-motor controllers (drives for fans, pumps, and small appliances), the MCHC908JW32FC's timer-PWM channels and 8 MHz CPU08 offer deterministic PWM generation at 8 kHz to 20 kHz above audible noise. The 32KB FLASH accommodates sensorless commutation tables and soft-start ramps, while the 1KB RAM is sufficient for closed-loop PI state. A typical circuit uses three GPIO-driven low-side MOSFETs with back-EMF sensing on a comparator input. The QFN-EP exposed pad keeps junction temperature below 85C at the device's modest core dissipation, even when enclosed in a motor housing. Engineers should add flyback diodes on inductive loads and verify PWM jitter against the CPU08 interrupt latency spec.
Recommandé
Consumer Remote Controls and IR Transmitters
Universal remote controls and IR/RF transmitter boards use the MCHC908JW32FC for low-cost button-matrix scanning and protocol encoding. The 29 GPIO easily drives an 8x8 button matrix plus an IR LED via timer PWM, and the 32KB FLASH stores NEC, RC5, RC6, and SIRC protocol tables for multi-brand compatibility. With CPU08 at 8 MHz, the device generates accurate 38 kHz and 40 kHz carrier frequencies for IR modulation without an external ceramic resonator in some configurations. The 48-QFN-EP package fits inside slim handheld enclosures where board area is constrained. Design notes: use a transistor driver (e.g., BC847) on the IR LED to limit peak GPIO current, and pair with a CR2032 LDO for stable 3V-to-5V regulation.
Recommandé
Industrial Sensor Interface Boards
In industrial sensor-interface boards that aggregate 4-20 mA loops, thermistor inputs, or digital switches into a single field node, the MCHC908JW32FC serves as the protocol converter and local controller. Its 10-bit ADC subsystem (where exposed on this package variant) and SCI interface let the MCU read analog sensors and forward data via RS-485 to a PLC. The 32KB FLASH supports Modbus RTU framing tables and sensor-calibration constants stored in non-volatile memory. Compared with a discrete analog front end plus a low-end MCU, this single chip reduces PCB area by 40% and provides a known firmware-update path via BDM. Designers should add isolation barriers (e.g., ADuM1411) and TVS diodes on field wiring for surge protection.
Recommandé
Toys and Educational Electronics
Battery-powered educational toys and hobbyist electronics kits benefit from the MCHC908JW32FC's 5V operation, 32KB FLASH, and 29 GPIO, all delivered in a small 7x7 mm QFN-EP. The CPU08 instruction set is widely documented in university curricula, making the device a familiar target for student projects, while FLASH reprogrammability allows reuse of the same board across multiple lab exercises. The 1KB RAM is sufficient for basic signal-generation and timing demos. Designers should add a low-dropout 3.3V regulator and an accessible BDM header for educational debug sessions, and ensure the QFN-EP ground pad is well-bonded to keep EMI low during PWM demos.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MCHC908JW32FC — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MCHC908JW32FAE | MCHC908JW16FC | MC68HC908JW32FC | MCHC908JG16FC | MCHC908JB16FC |
|---|---|---|---|---|---|---|
| Package | 48-QFN-EP (7x7 mm) | 48-QFN-EP (7x7 mm) - same | 48-QFN-EP (7x7 mm) - same | 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 | NXP Semiconductors | NXP Semiconductors |
| CPU Core | M68HC08 CPU08 | M68HC08 CPU08 | M68HC08 CPU08 | M68HC08 CPU08 | M68HC08 CPU08 | M68HC08 CPU08 |
| Clock Frequency | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz |
| FLASH Program Memory | 32 KB | 32 KB | 16 KB | 32 KB | 16 KB | 16 KB |
| RAM Size | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
Principaux différenciateurs
- Largest FLASH density in the 48-QFN-EP HC08 family (vs MCHC908JW16FC)
- 29 GPIO with full timer/ADC/SCI peripheral coverage (vs MCHC908JG16FC)
- Standardized HC08 instruction set for tooling reuse (vs MC68HC908JW32FC)
- In-circuit FLASH programming for field updates (vs MCHC908JB16FC)
Notes de conception
Place a 100 nF X7R ceramic decoupling capacitor within 3 mm of each VDD pin and a single 10 uF bulk capacitor near the QFN-EP ground pad. The HC08 core draws short current spikes during FLASH programming and ADC conversions, and inadequate decoupling can cause spurious resets on the RST line. Use a low-ESR 5V LDO (e.g., LM1117) rated for at least 100 mA peak to handle in-circuit programming bursts.
The QFN-EP exposed pad must be soldered to a continuous PCB ground plane with at least 4 thermal vias (0.3 mm drill) to the inner ground layer to keep junction temperature below 110C at commercial-grade ambient. Without proper EP soldering, theta_JA rises above 80 C/W and the part may thermally limit during sustained FLASH write cycles or continuous ADC sampling at the maximum 8 MHz bus frequency.
Ensure the BDM (background debug mode) header is brought out on every design that uses this MCU. Field firmware updates and factory programming both rely on the 4-pin BDM interface (BKGD, GND, VDD, RST). Skipping the BDM header forces expensive board-level recovery procedures if firmware corruption occurs during in-circuit programming. Also verify the OSC1/OSC2 load capacitors match the crystal manufacturer's CL specification - the HC08 internal oscillator is sensitive to load-capacitance errors above 5 pF.
Keep analog inputs (PTA0-PTA7) routed away from the OSC1/OSC2 traces and the PTD port used for SCI to avoid ADC crosstalk. Use a single-point ground star with the EPAD as the reference; do not split the ground plane under the QFN. The 48-QFN-EP pin pitch is 0.5 mm and requires no-clean solder paste and a hot-air or vapor-phase reflow profile with peak temperature below 245C to avoid EPAD solder voids.
Informations de conformité
RoHS/lead-free status not explicitly stated in the verified data for this legacy Freescale/NXP HC08 part. AEC-Q100 not applicable - the part is commercial-grade, not automotive-qualified. Conflict-minerals declaration status per NXP standard policy.
