MC908LJ24CPBE - 8-bit HC08 MCU, 24KB Flash, 8MHz, 64-LQFP | NXP
Référence : MC908LJ24CPBE ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $9.5 | $9,50 |
| 10 | $8.75 | $87,50 |
| 100 | $7.95 | $795,00 |
| 500 | $7.25 | $3 625,00 |
| 1 000 | $6.8 | $6 800,00 |
MC908LJ24CPBE Présentation
An 8-bit microcontroller (MCU) is a single-chip computer that contains a CPU core, program memory (Flash/ROM), data memory (RAM), and a set of on-chip peripherals such as timers, A/D converters, communication interfaces, and I/O ports. The HC08 core is a CISC (Complex Instruction Set Computer) architecture with an enhanced M68HC08 central processor unit (CPU08), placing this device in the hierarchy of: 8-bit MCU -> HC08 CISC -> M68HC08 Family -> Microcontroller -> Embedded IC -> Semiconductor. The HC08 architecture is widely used in industrial control, automotive body electronics, and consumer appliances where deterministic behavior and ease of programming are prioritized over raw throughput.
Key features of the MC908LJ24CPBE include 24KB of Flash program memory with in-circuit programming capability, 8 MHz maximum internal bus frequency, an integrated LCD driver with up to 32 segment lines, multiple 16-bit timer channels, a 10-bit A/D converter, and a built-in serial communications interface (SCI) and serial peripheral interface (SPI). The wide 3V to 5.5V operating voltage range and integrated LCD bias generation simplify the design of battery-powered and mains-powered metering or appliance front panels.
The HC08LJ family is based on NXP's customer-specific integrated circuit (CSIC) design strategy, allowing memory and peripheral configurations to be tailored for cost-sensitive applications. The CPU08 runs an extensive instruction set optimized for compiled C code and assembler, with built-in multiply and accumulate-friendly addressing modes. The device includes a configurable external interrupt block and a computer operating properly (COP) watchdog for safety-critical applications.
Typical applications include single-phase electricity meters, white goods user interfaces, medical monitoring devices with segment LCDs, point-of-sale terminals, and industrial control panels. The integrated LCD driver eliminates the need for an external display controller, reducing BOM cost in HMI designs.
When designing with this part, note that the EPP suffix denotes a specific flash revision and the LQFP-64 package requires a 1.27 mm lead pitch footprint. Decoupling should follow standard HC08 practice with one 100nF ceramic capacitor per VDD/VSS pair, placed within 5 mm of the pins.
This page synthesizes distributor pricing, last-time-buy notes for the discontinued part, drop-in alternatives, and practical design notes not found on a single manufacturer datasheet page.
Alternatives de remplacement direct pour MC908LJ24CPBE — 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 :
MC908LJ24CPBER2
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
MC908LJ24CFPE
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
MC908LK24CPBE
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
MC908GR60ACFU
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
MC9S08LL16CLH
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MC908LJ24CPBE Valeurs maximales et caractéristiques électriques
| Core Architecture | HC08 (M68HC08 Family, CPU08) |
| Largeur du bus de données | 8 bit |
| Instruction Set | CISC |
| Fréquence d'horloge maximale | 8 MHz (internal bus) |
| Program Memory Size | 24 KB Flash |
| Operating Voltage | 3.3 V / 5 V (3 V to 5.5 V) |
| Package Type | LQFP-64 (10x10 mm) |
| Nombre de broches | 64 |
| Lead Pitch | 0.5 mm |
| Integrated LCD Driver | Yes (segment display) |
| A/D Converter | Yes (10-bit) |
| Serial Interfaces | SCI, SPI |
| Timer Channels | 16-bit timer |
| Watchdog (COP) | Yes |
| Type de montage | Surface Mount |
| Statut RoHS | Compliant (per DigiKey listing) |
Guide de configuration des broches du MC908LJ24CPBE lqfp-64 (10x10 mm)
Configuration des broches du MC908LJ24CPBE (boîtier lqfp-64 (10x10 mm)). Ce circuit intégré numérique comprend des GPIO, des interfaces de communication (UART, SPI, I2C) et des broches d'alimentation. Consultez la fiche technique du fabricant pour les fonctions alternatives des broches et les options de configuration. Indispensable pour la conception de systèmes embarqués et la conception de circuits imprimés.
Aucune donnée de brochage détaillée disponible pour MC908LJ24CPBE.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
MC908LJ24CPBE convient pour 6 applications: Single-Phase Electricity Meter, White Goods HMI Controller, Medical Monitoring Device, Point-of-Sale (POS) Terminal, Industrial Control Panel, Battery-Powered Sensor Display.
Single-Phase Electricity Meter
The MC908LJ24CPBE's integrated 10-bit ADC samples shunt current and line voltage at the metering front end, while the HC08 CPU08 core computes active and reactive power in firmware. Its on-chip segment-LCD driver directly drives the meter display unit with up to 32 segments, eliminating an external display controller. The 24KB Flash holds calibration tables and metrology firmware, while the SCI provides an optocoupler-isolated UART to an AMI communications module. Operating from 3V to 5.5V makes this part compatible with battery-backed real-time-clock power rails as well as mains-derived capacitor-drop supplies.
Recommandé
White Goods HMI Controller
In washing machines, dishwashers, and ovens, the MC908LJ24CPBE serves as a low-cost human-machine interface controller driving the front-panel LCD and scanning capacitive or resistive touch buttons. The HC08 core cycles through menu state machines while the 16-bit timer generates the beeper tones. The integrated LCD bias generator accepts the 5V supply directly, so designers avoid an extra charge-pump regulator. The 24KB Flash holds localized wash-cycle firmware and diagnostic routines, while the COP watchdog prevents lock-ups during power-line transients.
Recommandé
Medical Monitoring Device
Portable medical devices such as blood-pressure monitors and digital thermometers leverage the MC908LJ24CPBE for its low-power 3.3V operation, integrated A/D converter for sensor signal conditioning, and segment LCD driver for readouts. The HC08 CISC instruction set supports clean assembly code for medical algorithms and lookup tables. Designers can dedicate the SPI port to a digital pressure sensor and the SCI to a Bluetooth or USB-to-UART bridge for clinic connectivity. With 24KB Flash, complex averaging and trend-logging algorithms fit comfortably.
Recommandé
Point-of-Sale (POS) Terminal
Compact countertop POS terminals use the MC908LJ24CPBE as a battery-management and display co-processor, taking advantage of the integrated segment-LCD driver for the operator-facing numeric display and the SPI for a secure-element or NFC front-end. The HC08 CPU handles keypad debouncing and LCD refresh while the host runs the heavier transaction processing. Wide 3V-5.5V supply tolerance simplifies designs that share power with thermal printer heads and battery chargers.
Recommandé
Industrial Control Panel
Industrial operator panels mounted on machine enclosures benefit from the MC908LJ24CPBE's integrated segment LCD, which shows status, RPM, or temperature set-points without a TFT. The COP watchdog and 8 MHz HC08 core with 24KB Flash are sufficient for ladder-logic-style sequencing of relays and contactors. The 10-bit ADC reads 4-20 mA or 0-10 V process signals directly, and the SCI carries Modbus RTU traffic back to the PLC. The LQFP-64 footprint is well-suited to through-hole-pin compatible aftermarket sockets.
Recommandé
Battery-Powered Sensor Display
Wireless sensor nodes with a local readout, such as CO2 detectors and HVAC zone thermostats, draw on the MC908LJ24CPBE for its wide 3V to 5.5V supply range - directly compatible with two AA cells or a CR123A lithium primary. The HC08 CPU sleeps between sensor bursts, wakes on timer overflow, and refreshes the LCD via the integrated driver. The 24KB Flash accommodates sensor calibration constants and RF protocol stacks for sub-GHz or BLE bridge chips over SCI/SPI.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MC908LJ24CPBE — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MC908LJ24CPBER2 | MC908LJ24CFPE | MC908LK24CPBE | MC908GR60ACFU | MC9S08LL16CLH |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | LQFP-64 (PBE) 10x10 mm | LQFP-64 (PBE) 10x10 mm - same | LQFP-64 (PBE) 10x10 mm - same | LQFP-64 (PBE) 10x10 mm - same | LQFP-64 - same | LQFP-64 - same |
| Core | HC08 (CPU08) | HC08 (CPU08) - same | HC08 (CPU08) - same | HC08 (CPU08) - same | HC08 (CPU08) - same | S08 - different core family |
| Flash Memory | 24 KB | 24 KB - same | 24 KB - same | 24 KB - same | 60 KB (+150%) | 16 KB (-33%) |
| Maximum Clock Frequency | 8 MHz | 8 MHz - same | 8 MHz - same | 8 MHz - same | 8 MHz - same | Up to 20 MHz |
| Integrated LCD Driver | Yes, up to 32 segments | Yes, same | Yes, same | Yes, more segments | LCD varies - check datasheet | Yes, optimized LCD |
| Operating Voltage | 3 V to 5.5 V | 3 V to 5.5 V - same | 3 V to 5.5 V - same | 3 V to 5.5 V - same | 3 V to 5.5 V - same | 1.8 V to 3.6 V - different |
| Lifecycle Status (as of 2026-10-18) | Obsolete (NLM) | Obsolete (NLM) | Obsolete (NLM) | Obsolete (NLM) | Obsolete (NLM) | Active |
Principaux différenciateurs
- Integrated segment LCD driver (vs MC908GR60ACFU)
- Future-proof migration path to S08LL (vs MC908LJ24CPBER2)
- Wider operating voltage tolerance (vs MC9S08LL16CLH)
Notes de conception
Decouple each VDD/VSS pin pair with a 100 nF ceramic capacitor placed within 5 mm of the pins, following standard HC08 practice. Add a bulk 4.7-10 uF capacitor near the regulator output. The internal voltage regulator should be bypassed with at least 1 uF on the VREG pin if exposed. The LCD charge pump requires a low-ESR reservoir capacitor on the LCDCAP pin - consult the application section of the datasheet for the recommended value.
The 64-LQFP package has a 0.5 mm lead pitch - design PCB pads to the IPC-7351 nominal land pattern and use 0.3 mm wide traces between pads where space allows. The exposed thermal pad on bottom is NOT present on PBE; thermal management is solely through the lead frame to PCB copper pours. Provide a 1 oz copper ground pour on both top and bottom layers stitched with thermal vias under the LQFP footprint.
Do not assume the COP watchdog is disabled by default - clear the COPCR register in your startup code to prevent unwanted resets. The IRQ pin is sensitive to noise; add a 10 kohm pull-up and 100 pF noise filter when IRQ is not used. The MCU will not enter stop mode unless the LVIREG bit is configured; otherwise current draw will be much higher than expected for battery-powered designs.
Keep the OSC1/OSC2 traces short and surrounded by a ground guard ring for EMC robustness with the crystal or resonator. The integrated LCD driver segment outputs transition at relatively high impedance - route the segment and backplane traces away from noise sources such as switching regulator feedback nodes. Maintain the analog ground (VSSA) plane separated from digital ground (VSSD) until they join at a single star point near the regulator.
Informations de conformité
RoHS and lead-free compliance confirmed via DigiKey listings. AEC-Q100 not applicable for legacy consumer/industrial MCU. Halogen-free status not explicitly stated in supplied verified web data.
