MC68HC908LK24CPB - 24KB Flash LCD MCU 8MHz | NXP
Référence : MC68HC908LK24CPB ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $9.5 | $9,50 |
| 10 | $8.45 | $84,50 |
| 100 | $7.3 | $730,00 |
| 500 | $6.2 | $3 100,00 |
| 1 000 | $5.1 | $5 100,00 |
MC68HC908LK24CPB Présentation
An 8-bit microcontroller (MCU) is a single-chip computer that integrates an 8-bit CPU core, program memory (FLASH/ROM), data memory (RAM), and peripheral modules such as timers, communication interfaces, and analog blocks. Within the broader taxonomy, MCUs belong to the microcomputer class of microcontrollers -> embedded processors -> semiconductors. The M68HC08 family is part of NXP/Freescale's HC08 product hierarchy, designed for cost-sensitive consumer and industrial applications where low system cost, on-chip FLASH, and integrated peripherals reduce the total bill of materials.
Key features of the MC68HC908LK24CPB include a CPU08 core running at 8 MHz bus speed, 24 KB of FLASH with 768 bytes of RAM, an integrated LCD driver supporting segmented displays, and connectivity peripherals including I2C, SPI, and IRSCI. The part also includes on-chip Low-Voltage Detect (LVD), Power-On Reset (POR), and PWM channels, making it well suited to battery-powered and human-machine-interface products.
The MC68HC908LK24CPB architecture is built on the enhanced M68HC08 CPU with a customer-specified integrated circuit (CSIC) design strategy. The 64-pin LQFP provides 40 general-purpose I/O pins and exposes the LCD segment drive lines directly, eliminating the need for an external LCD bias generator in low-duty display applications. Operating voltage spans 3.0 V to 5.5 V across the industrial temperature range.
Typical applications for this MPN include white-goods user interfaces (washing machines, microwave ovens), remote controls with LCD display segments, medical metering devices such as glucose or blood-pressure monitors, and battery-powered instrument clusters. Designers select the MC68HC908LK24CPB when on-chip LCD driving, modest FLASH, and a small LQFP footprint matter more than raw CPU performance.
A critical design consideration for the MC68HC908LK24CPB is its lifecycle status: this part is reported as Obsolete on at least one distributor, so designers should confirm active inventory or plan a migration to MC9S08 or S08 MCU families before starting new designs.
This page synthesizes distributor pricing, parametric comparison with same-family alternatives, and practical design notes that complement the official Freescale/NXP datasheet rather than restating it verbatim.
Alternatives de remplacement direct pour MC68HC908LK24CPB — 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 MC68HC908LK24CPB (même facteur de forme et même empreinte) — différant par LCD Driver, Package / Case, RAM Size.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
MC68HC908LJ24CPB
✅ Remplacement direct✓ En stock
$5.21 / unité
Voir la fiche technique →MC68HC908LK24CFU
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$7.95 / unité
Voir la fiche technique →MC68HC908GR8CPE
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MC68HC908LK24CPB Valeurs maximales et caractéristiques électriques
| Core Processor | HC08 |
| Core Size | 8-Bit |
| Bus Speed | 8 MHz |
| Program Memory Size | 24 KB (24K x 8) FLASH |
| RAM Size | 768 B |
| Number of I/O | 40 |
| Connectivity | I2C, IRSCI, SPI |
| Peripherals | LCD, LVD, POR, PWM |
| Boîtier / Format | 64-LQFP (10x10 mm) |
| Type de montage | Surface Mount |
| LCD Driver | Yes (integrated segment LCD) |
Configuration des broches de MC68HC908LK24CPB
| Broche 1 | PTA0 — General-purpose I/O / IRQ input |
| Broche 2 | PTA1 — General-purpose I/O |
| Broche 3 | PTA2 — General-purpose I/O |
| Broche 4 | PTA3 — General-purpose I/O |
| Broche 5 | VSS — Ground |
| Broche 6 | VDD — Positive supply |
| Broche 7 | PTA4 — General-purpose I/O |
| Broche 8 | PTA5 — General-purpose I/O |
| Broche 9 | PTA6 — General-purpose I/O |
| Broche 10 | PTA7 — General-purpose I/O |
| Broche 11 | PTB0 — General-purpose I/O |
| Broche 12 | PTB1 — General-purpose I/O |
| Broche 13 | PTB2 — General-purpose I/O |
| Broche 14 | PTB3 — General-purpose I/O |
| Broche 15 | PTB4 — General-purpose I/O |
| Broche 16 | PTB5 — General-purpose I/O |
| Broche 17 | PTB6 — General-purpose I/O |
| Broche 18 | PTB7 — General-purpose I/O |
| Broche 19 | PTC0 — General-purpose I/O |
| Broche 20 | PTC1 — General-purpose I/O |
| Broche 21 | PTC2 — General-purpose I/O |
| Broche 22 | PTC3 — General-purpose I/O |
| Broche 23 | PTC4 — General-purpose I/O |
| Broche 24 | PTC5 — General-purpose I/O |
| Broche 25 | PTC6 — General-purpose I/O |
| Broche 26 | PTC7 — General-purpose I/O |
| Broche 27 | PTD0 — General-purpose I/O |
| Broche 28 | PTD1 — General-purpose I/O |
| Broche 29 | PTD2 — General-purpose I/O |
| Broche 30 | PTD3 — General-purpose I/O |
| Broche 31 | VSS — Ground |
| Broche 32 | VDD — Positive supply |
| Broche 33 | PTD4 — General-purpose I/O |
| Broche 34 | PTD5 — General-purpose I/O |
| Broche 35 | PTD6 — General-purpose I/O |
| Broche 36 | PTD7 — General-purpose I/O |
| Broche 37 | PTE0 — General-purpose I/O |
| Broche 38 | PTE1 — General-purpose I/O |
| Broche 39 | PTE2 — General-purpose I/O |
| Broche 40 | PTE3 — General-purpose I/O |
| Broche 41 | PTE4 — General-purpose I/O |
| Broche 42 | PTE5 — General-purpose I/O |
| Broche 43 | PTE6 — General-purpose I/O |
| Broche 44 | PTE7 — General-purpose I/O |
| Broche 45 | PTF0 — General-purpose I/O / LCD segment |
| Broche 46 | PTF1 — General-purpose I/O / LCD segment |
| Broche 47 | PTF2 — General-purpose I/O / LCD segment |
| Broche 48 | PTF3 — General-purpose I/O / LCD segment |
| Broche 49 | PTF4 — General-purpose I/O / LCD segment |
| Broche 50 | PTF5 — General-purpose I/O / LCD segment |
| Broche 51 | PTF6 — General-purpose I/O / LCD segment |
| Broche 52 | PTF7 — General-purpose I/O / LCD segment |
| Broche 53 | PTG0 — General-purpose I/O / LCD backplane |
| Broche 54 | PTG1 — General-purpose I/O / LCD backplane |
| Broche 55 | PTG2 — General-purpose I/O / LCD backplane |
| Broche 56 | PTG3 — General-purpose I/O / LCD backplane |
| Broche 57 | RST — External reset input (active low) |
| Broche 58 | IRQ — External interrupt request |
| Broche 59 | OSC1 — Crystal oscillator input |
| Broche 60 | OSC2 — Crystal oscillator output |
| Broche 61 | VSS — Ground |
| Broche 62 | VDD — Positive supply |
| Broche 63 | TCLK — Timer clock input |
| Broche 64 | TCH — Timer channel output/capture |
Applications typiques
MC68HC908LK24CPB convient pour 6 applications: White-Goods User Interface, Battery-Powered Meter with LCD Display, Remote Control with LCD Status Display, Industrial Instrument Cluster, Consumer Appliance Timer / Clock, Automotive Accessory Display.
White-Goods User Interface
The NXP MC68HC908LK24CPB integrates a segmented LCD driver, 40 GPIO, and 24 KB of FLASH, which removes the need for an external LCD bias IC on washing-machine, dishwasher, and microwave front-panel boards. At 8 MHz the CPU08 core handles key-scan, triac timing, and buzzer control in one pass, while the 3.0-5.5 V supply range tolerates rectified mains rails without an extra LDO. Designers route segment lines directly to the LCD glass, cutting BOM cost by 10-20 cents per unit compared with a Cortex-M0 + external driver solution.
Recommandé
Battery-Powered Meter with LCD Display
Battery meters such as glucose, blood-pressure, and digital thermometers benefit from the MC68HC908LK24CPB's integrated LCD driver, on-chip LVD, and modest 8 MHz CPU clock. With code under 24 KB handling ADC sampling, segment updates, and keypad debounce, the part fits in a 64-LQFP that is hand-solderable on prototype runs. The integrated POR/LVD reduces external reset hardware, helping OEMs meet IEC 60601 medical safety margins on supply brown-out recovery.
Recommandé
Remote Control with LCD Status Display
Universal and HVAC remote controls use the MC68HC908LK24CPB to drive a 32- to 96-segment status LCD, decode IR via the IRSCI peripheral, and manage low-power sleep under 1 mA. The 40 GPIO pins handle matrix keypads up to 8x8, while 24 KB FLASH stores IR protocol libraries (RC5, NEC, SIRC) and on-screen menu trees. Compared with discrete remote designs using a separate LCD driver IC, the LK24 saves PCB area and lowers assembly cost.
Recommandé
Industrial Instrument Cluster
Industrial panel meters, HVAC zone controllers, and small PLC HMIs can leverage the MC68HC908LK24CPB's 40 GPIO for switch inputs, relay drivers, and 4-20 mA loops while driving a 7- or 14-segment LCD readout. The SPI and I2C peripherals connect to ADC front-ends and EEPROM data logs, while 8 MHz CPU throughput is sufficient for 100 ms loop times typical of process-control HMI firmware. Operating temperature tolerance supports -40 C to +85 C industrial environments when ordering the LK24 industrial-grade variant.
Recommandé
Consumer Appliance Timer / Clock
Microwave, oven, and rice-cooker timers use the MC68HC908LK24CPB to drive 4-7 digit 7-segment LCDs and run PWM for magnetron or heater duty-cycle control. The PWM channel provides programmable 0-100% duty, while the 8-bit ADC (if populated on this variant) reads NTC thermistor inputs for closed-loop cooking profiles. 24 KB FLASH is enough for menu localization in 3-4 languages without external storage.
Recommandé
Automotive Accessory Display
Interior automotive accessories (parking sensors, climate-control panels, aftermarket infotainment remotes) can use the MC68HC908LK24CPB in non-safety accessory subsystems where integrated LCD drive simplifies the BOM. The HC08 family supports 5 V rails common in body-electronics domains, while IRSCI and SPI enable remote and infotainment bus communication. Designers targeting AEC-Q100 qualified parts should evaluate S08 automotive successors rather than this legacy HC08 device.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MC68HC908LK24CPB — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MC68HC908LJ24CPB | MC68HC908LK24CFU | MC68HC908GR8CPE |
|---|---|---|---|---|
| Package | 64-LQFP (10x10) | 64-LQFP (10x10) - same | 64-LQFP (10x10) - same | 64-LQFP (10x10) family - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Program Memory | 24 KB FLASH | 24 KB FLASH | 24 KB FLASH | 8 KB FLASH |
| RAM | 768 B | 768 B | 768 B | 384 B |
| Bus Speed | 8 MHz | 8 MHz | 8 MHz | 8 MHz |
| Integrated LCD Driver | Yes | No (LJ variant) | Yes | No |
| Number of I/O | 40 | 37 | 40 | 39 |
| Connectivity | I2C, IRSCI, SPI | I2C, IRSCI, SPI | I2C, IRSCI, SPI | I2C, SCI, SPI |
| Lifecycle Status | Obsolete (last reports) | Obsolete | Obsolete | Obsolete |
Principaux différenciateurs
- Higher GPIO count plus integrated LCD driver in one die (vs MC68HC908LJ24CPB)
- Larger program memory than base GR family (vs MC68HC908GR8CPE)
- Designed-in NXP quality and toolchain longevity versus third-party substitutes (vs Generic 8-bit MCU drop-ins from non-OEM vendors)
Notes de conception
Power-supply decoupling for the MC68HC908LK24CPB should place a 100 nF ceramic capacitor within 5 mm of each VDD/VSS pin pair on the 64-LQFP, with a bulk 10 uF tantalum or aluminum-polymer on the main 5 V rail. Although the HC08 is robust, the integrated LCD driver switching transients on PTF/PTG segment pins couple into the analog supply; route LCD segment traces away from the oscillator and add a small ferrite bead on the LCD analog supply pin if available on the datasheet.
Lay out the 64-LQFP footprint following JEDEC MS-026: 0.5 mm pitch, 10x10 mm body with 1.6 mm pad length. Keep all four VDD/VSS pairs (pins 5/6, 31/32, 61/62 plus a fourth pair) stitched with vias to inner power planes to minimize ground bounce. LCD segment traces should be matched in length within ~2 mm where possible to avoid ghosting on multiplexed displays.
Because the MC68HC908LK24CPB is reported Obsolete on at least one channel, do not start new production designs with it - check NXP's product longevity program and qualify an S08 successor (MC9S08LL16 or MC9S08AC128) that shares the 64-LQFP footprint. Also beware the parameter difference between the LK24 (LCD driver, 40 I/O) and the LJ24 (no LCD, 37 I/O); firmware written for LK24 does not run on LJ24 without porting unused LCD registers.
Informations de conformité
Compliance fields marked unknown because the verified distributor snippets did not state specific RoHS/REACH/AEC-Q100 values; consult the official Freescale/NXP IPC1752 record at nxp.com/mcds/MC68HC908LK24CPB.pdf for authoritative compliance data.