MC68HC908LK24CPB - 24KB Flash LCD MCU 8MHz | NXP
MPN: MC68HC908LK24CPB ✗ Cuối đờiMC68HC908LK24CPB Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho MC68HC908LK24CPB — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với MC68HC908LK24CPB (cùng hình factor và footprint) — khác nhau ở LCD Driver, Package / Case, RAM Size.
MC68HC908LJ24CPB
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC68HC908LK24CFU
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →MC68HC908GR8CPE
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC68HC908LK24CPB Tỷ lệ tối đa & tính chất điện
| 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 |
| Hộp / Vỏ | 64-LQFP (10x10 mm) |
| Kiểu lắp đặt | Surface Mount |
| LCD Driver | Yes (integrated segment LCD) |
Cấu hình chân MC68HC908LK24CPB
| Chân 1 | PTA0 — General-purpose I/O / IRQ input |
| Chân 2 | PTA1 — General-purpose I/O |
| Chân 3 | PTA2 — General-purpose I/O |
| Chân 4 | PTA3 — General-purpose I/O |
| Chân 5 | VSS — Ground |
| Chân 6 | VDD — Positive supply |
| Chân 7 | PTA4 — General-purpose I/O |
| Chân 8 | PTA5 — General-purpose I/O |
| Chân 9 | PTA6 — General-purpose I/O |
| Chân 10 | PTA7 — General-purpose I/O |
| Chân 11 | PTB0 — General-purpose I/O |
| Chân 12 | PTB1 — General-purpose I/O |
| Chân 13 | PTB2 — General-purpose I/O |
| Chân 14 | PTB3 — General-purpose I/O |
| Chân 15 | PTB4 — General-purpose I/O |
| Chân 16 | PTB5 — General-purpose I/O |
| Chân 17 | PTB6 — General-purpose I/O |
| Chân 18 | PTB7 — General-purpose I/O |
| Chân 19 | PTC0 — General-purpose I/O |
| Chân 20 | PTC1 — General-purpose I/O |
| Chân 21 | PTC2 — General-purpose I/O |
| Chân 22 | PTC3 — General-purpose I/O |
| Chân 23 | PTC4 — General-purpose I/O |
| Chân 24 | PTC5 — General-purpose I/O |
| Chân 25 | PTC6 — General-purpose I/O |
| Chân 26 | PTC7 — General-purpose I/O |
| Chân 27 | PTD0 — General-purpose I/O |
| Chân 28 | PTD1 — General-purpose I/O |
| Chân 29 | PTD2 — General-purpose I/O |
| Chân 30 | PTD3 — General-purpose I/O |
| Chân 31 | VSS — Ground |
| Chân 32 | VDD — Positive supply |
| Chân 33 | PTD4 — General-purpose I/O |
| Chân 34 | PTD5 — General-purpose I/O |
| Chân 35 | PTD6 — General-purpose I/O |
| Chân 36 | PTD7 — General-purpose I/O |
| Chân 37 | PTE0 — General-purpose I/O |
| Chân 38 | PTE1 — General-purpose I/O |
| Chân 39 | PTE2 — General-purpose I/O |
| Chân 40 | PTE3 — General-purpose I/O |
| Chân 41 | PTE4 — General-purpose I/O |
| Chân 42 | PTE5 — General-purpose I/O |
| Chân 43 | PTE6 — General-purpose I/O |
| Chân 44 | PTE7 — General-purpose I/O |
| Chân 45 | PTF0 — General-purpose I/O / LCD segment |
| Chân 46 | PTF1 — General-purpose I/O / LCD segment |
| Chân 47 | PTF2 — General-purpose I/O / LCD segment |
| Chân 48 | PTF3 — General-purpose I/O / LCD segment |
| Chân 49 | PTF4 — General-purpose I/O / LCD segment |
| Chân 50 | PTF5 — General-purpose I/O / LCD segment |
| Chân 51 | PTF6 — General-purpose I/O / LCD segment |
| Chân 52 | PTF7 — General-purpose I/O / LCD segment |
| Chân 53 | PTG0 — General-purpose I/O / LCD backplane |
| Chân 54 | PTG1 — General-purpose I/O / LCD backplane |
| Chân 55 | PTG2 — General-purpose I/O / LCD backplane |
| Chân 56 | PTG3 — General-purpose I/O / LCD backplane |
| Chân 57 | RST — External reset input (active low) |
| Chân 58 | IRQ — External interrupt request |
| Chân 59 | OSC1 — Crystal oscillator input |
| Chân 60 | OSC2 — Crystal oscillator output |
| Chân 61 | VSS — Ground |
| Chân 62 | VDD — Positive supply |
| Chân 63 | TCLK — Timer clock input |
| Chân 64 | TCH — Timer channel output/capture |
Ứng dụng tiêu biểu
MC68HC908LK24CPB phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MC68HC908LK24CPB — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- Higher GPIO count plus integrated LCD driver in one die (vsMC68HC908LJ24CPB)
- Larger program memory than base GR family (vsMC68HC908GR8CPE)
- Designed-in NXP quality and toolchain longevity versus third-party substitutes (vsGeneric 8-bit MCU drop-ins from non-OEM vendors)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.