MCHC908LK24CFQE - 8-Bit HC08 MCU 24KB Flash 80-QFP | NXP
MPN: MCHC908LK24CFQE ⚠ Lần mua cuốiMCHC908LK24CFQE Tóm tắt
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and programmable I/O peripherals around a compact instruction set. The HC08 family from NXP (formerly Freescale) is based on the M68HC08 central processor unit (CPU08), a CISC architecture with an enhanced instruction set built around the customer-specific integrated circuit (CSIC) design strategy. The HC08 family hierarchy is: HC08 MCU -> 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. Within the family hierarchy, MCHC908LK24CFQE belongs to the HC08LJ and HC08LK sub-families, which add an on-chip LCD driver for human-machine interface applications.
The device operates from 3.3V or 5V supplies at a CPU clock speed of 8 MHz, with 768 bytes of RAM and 40 general-purpose I/O lines. Programmable connectivity is provided through I2C, IRSCI (infrared serial communications interface), and SPI peripherals. On-chip system support includes an LCD driver, low-voltage detection (LVD), power-on reset (POR), pulse-width modulation (PWM) channels, and a real-time interrupt (RTI). The wide 3.3V/5V dual-voltage supply makes the device compatible with both 3.3V and 5V system designs.
Architecturally, the MCHC908LK24CFQE implements the CPU08 core with BCD arithmetic instructions, an 8-bit stack pointer, and 16-bit index register for efficient C source compilation. The internal Flash supports in-application programming (IAP) via the standard HC08 monitor mode, simplifying firmware updates over the serial bootloader. The integrated LCD driver supports up to 32x4 segment multiplexing directly from the chip, eliminating external display drivers in low-cost HMI designs.
Typical applications include industrial LCD-based HMI panels, appliance control boards (washing machines, microwave ovens, thermostats), security keypads, point-of-sale terminals, and battery-powered metering devices. The combination of low cost, on-chip LCD, and HC08 toolchain maturity makes it a strong fit for cost-sensitive consumer and industrial control products.
When designing with this device, allocate PCB area for a 14x14 mm PQFP land pattern and ensure the on-chip LCD driver bias resistors are sized correctly for the chosen glass. Note that the part is flagged 'Not For New Designs' on the manufacturer product page - new designs should evaluate the S08 or Kinetis E-series successors.
Bộ thay thế dễ dàng lắp đặt cho MCHC908LK24CFQE — 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 MCHC908LK24CFQE (cùng hình factor và footprint) — khác nhau ở Program Memory Size, RAM Size, Number of I/O Pins, Peripherals, Program Memory Type.
MC908LJ24CFQE
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| Manufacturer | NXP Semiconductors (formerly Freescale) |
| Series | HC08 |
| Part Status | Not For New Designs |
| Core Processor | HC08 |
| Core Size | 8-Bit |
| Speed | 8 MHz |
| Connectivity | I2C, IRSCI, SPI |
| Peripherals | LCD, LVD, POR, PWM |
| Number of I/O | 40 |
| Program Memory Size | 24KB (24K x 8) |
| Program Memory Type | FLASH |
| RAM Size | 768 x 8 |
| Voltage - Supply (Vcc/Vdd) | 3.3V / 5V |
| Hộp | 80-QFP (14x14 mm) |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | -40C to +85C (industrial) |
Hướng dẫn cấu hình chân MCHC908LK24CFQE 80-qfp (14x14 mm)
Cấu hình chân cho MCHC908LK24CFQE (80-qfp (14x14 mm) gói). IC số này bao gồm chân GPIO, giao diện truyền thông (UART, SPI, I2C) và chân nguồn. Tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết các chức năng chân thay thế và tùy chọn cấu hình. Cực kỳ quan trọng cho thiết kế hệ thống tích hợp và lập trình PCB.
Không có dữ liệu chân cụ thể sẵn có cho MCHC908LK24CFQE.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
MCHC908LK24CFQE phù hợp cho 6 Áp dụngs: Industrial LCD HMI Panel, White Goods Appliance Control, Security Keypad and Access Control, Battery-Powered Metering Device, Point-of-Sale Terminal, Thermostat and Climate Control.
Industrial LCD HMI Panel
The MCHC908LK24CFQE's on-chip LCD driver and 40 programmable I/O pins make it ideal for industrial human-machine interface (HMI) panels with multiplexed glass. The 24KB Flash holds menu/UI firmware for human-readable status displays; the 768B RAM is sufficient for parameter buffers. Operating from 3.3V/5V dual supply simplifies integration with both legacy 5V and modern 3.3V backplane logic. The 8 MHz CPU08 core delivers sufficient throughput for menu navigation and sensor polling.
Được đề xuất
White Goods Appliance Control
The MCHC908LK24CFQE is well-suited for white-goods appliance control boards (washing machines, microwave ovens, dishwashers). Its low cost, on-chip LCD driver eliminates external display ICs, and the 24KB Flash holds motor-control and user-interface firmware. The PWM channels drive motor bridges and heater elements; the I2C/SPI peripherals interface to sensor and keypad subsystems. Industrial temperature grade (-40C to +85C) supports appliance operating environments.
Được đề xuất
Security Keypad and Access Control
Security keypad and access-control panels benefit from the MCHC908LK24CFQE's integrated LCD driver and HC08 toolchain maturity. The 40 I/O pins scan matrix keypads and drive status LEDs; the IRSCI peripheral supports infrared remote interfaces for wireless access control; the I2C peripheral connects to RFID/NFC reader ICs. Flash-resident firmware can implement PIN encryption and tamper detection without external secure elements.
Được đề xuất
Battery-Powered Metering Device
The MCHC908LK24CFQE's low-voltage detection (LVD) and industrial temperature tolerance make it appropriate for battery-powered metering devices such as utility meters and remote sensors. The on-chip PWM supports metering pulse generation; the IRSCI peripheral enables optical data ports for meter reading. The 3.3V/5V dual supply improves power-conversion efficiency, extending battery life between replacement cycles in field installations.
Được đề xuất
Point-of-Sale Terminal
Point-of-sale (POS) terminals use the MCHC908LK24CFQE's on-chip LCD for alphanumeric customer displays, I2C/SPI to communicate with magstripe readers, and PWM channels to drive buzzer/audio cues. The 24KB Flash holds transaction firmware and encryption keys; the HC08 monitor-mode bootloader simplifies field firmware updates via serial. The wide supply tolerance (3.3V/5V) matches mixed-voltage POS peripherals.
Được đề xuất
Thermostat and Climate Control
The MCHC908LK24CFQE drives thermostat and climate-control products where cost, LCD display, and PWM-based HVAC relay control are required. The 8 MHz CPU08 core is sufficient for thermostat loop control; the on-chip LCD displays temperature setpoint and operating mode; the PWM channels drive HVAC damper and compressor relays; the A/D converter (not detailed in snippet) supports thermistor sensing. Industrial temperature grade (-40C to +85C) covers HVAC installation environments.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MCHC908LK24CFQE — 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 | MC908LJ24CFQE | MC68HC908LK24CFQ | MCHC908LK24CFQE |
|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 80-QFP (14x14 mm) | 80-QFP (14x14) - same | 80-QFP (14x14) - same | 80-QFP (14x14) - same |
| Core | HC08 8-bit at 8 MHz | HC08 8-bit at 8 MHz | HC08 8-bit at 8 MHz | HC08 8-bit at 8 MHz |
| Flash Memory | 24KB (24K x 8) | 24KB (24K x 8) | 24KB (24K x 8) | 24KB (24K x 8) |
| RAM Size | 768 x 8 | 768 x 8 | 768 x 8 | 768 x 8 |
| Number of I/O | 40 | 40 | 40 | 40 |
| Supply Voltage | 3.3V / 5V | 3.3V / 5V | 3.3V / 5V | 3.3V / 5V |
| LCD Driver | Yes (on-chip) | Yes (on-chip, LJ variant) | Yes (on-chip) | Yes (on-chip) |
| Connectivity | I2C, IRSCI, SPI | I2C, IRSCI, SPI | I2C, IRSCI, SPI | I2C, IRSCI, SPI |
Bảo phân biệt quan trọng
- On-chip LCD driver eliminates external display ICs (vsMC9S08AC16MBE)
- HC08LJ vs HC08LK LCD glass flexibility (vsMC908LJ24CFQE)
- 5V supply tolerance for legacy systems (vsMC9S08QE4CLC (3.3V only))
Ghi chú thiết kế
The MCHC908LK24CFQE supports 3.3V and 5V dual-voltage supply via the Vcc/Vdd pins. Decouple Vcc with at least 0.1uF ceramic plus 10uF bulk, placed within 5 mm of the IC pins. The on-chip low-voltage detection (LVD) block triggers a safe reset when Vcc falls below the configured threshold (3.0V in 3.3V mode, 4.5V in 5V mode per the HC08 family datasheet). Always enable LVD in firmware for brownout-resilient operation in industrial environments.
Place the external crystal/oscillator within 5 mm of the OSC1/OSC2 pins and route ground traces on both sides of the crystal to minimize noise coupling. The 80-QFP (14x14 mm) package requires a 0.5 mm pitch land pattern - follow the NXP package drawing in the HC08 family datasheet for exact pad dimensions. Keep analog and digital sections of the PCB physically separated to reduce LCD driver switching noise into sensitive analog circuits.
Estimated: at 8 MHz CPU clock and 5V supply, the MCHC908LK24CFQE typically consumes 15-25 mA active current. Failing to enable Flash WAIT/STOP modes increases sleep current by orders of magnitude; always use STOP or WAIT instructions for battery-powered metering applications. The monitor-mode bootloader requires IRQ/IRQ vector fuses to be programmed in a specific order - misprogramming locks the device until mass-erase via background debug mode is performed.
Thông tin tuân thủ
Compliance data not provided in the verified web data snippets - marked unknown. RoHS and lead-free status should be verified against the NXP product page or full datasheet revision. AEC-Q100 not applicable for non-automotive MCU.