MC908KX8MDWE - 8MHz 8KB Flash 8-Bit MCU | NXP
MPN： MC908KX8MDWE ✗ 停產MC908KX8MDWE 概覽
An HC08 microcontroller is an 8-bit embedded-processing component within the broader microcontroller and semiconductor hierarchy. It executes firmware from embedded memory and interfaces with sensors, switches, displays, actuators, and communication peripherals through its general-purpose input/output structure. The HC08K family is associated with object-code compatibility across the M6805, M146805, and M68HC05 families, allowing engineers to evaluate legacy firmware portability when maintaining or cloning an existing platform.
Verified headline features include an 8 MHz maximum internal bus frequency, 8 KB flash memory, 8-bit data-bus width, and a 16-pin SOIC package. Distributor listings also identify 3.3 V and 5 V operating options. These details define the device as a compact general-purpose controller rather than a high-performance application processor. Its 8 KB program-memory ceiling limits application size, while the 8-bit architecture simplifies peripheral control and can reduce software overhead for straightforward embedded tasks.
The HC08K family uses the M68HC08 architecture and supports upward-compatible object code for selected earlier HC08-related families. This compatibility is valuable in long-life products because existing algorithms may be reused, although board-level peripheral mappings, electrical conditions, and toolchain support still require verification. The available evidence does not provide detailed RAM, timer, serial-interface, operating-temperature, or pin-function data, so those parameters must not be inferred.
Typical uses include appliance controllers, small motor-control interfaces, keypads, LED indicators, sensor-conditioning interfaces, and legacy industrial equipment. For a new design, the 8 MHz bus and 8 KB flash capacity favor compact control logic rather than communications gateways, graphical interfaces, or data-intensive systems. Firmware developers should verify pin multiplexing, interrupt vectors, timing peripherals, and development-tool support before committing the part to a new PCB.
This page synthesizes the verified manufacturer and distributor listings, package information, lifecycle context, and cross-reference findings for MC908KX8MDWE. It also distinguishes confirmed facts from unavailable technical details and avoids presenting unverified cross-brand replacements as drop-in parts.
直接替換替代品，適用於 MC908KX8MDWE — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： MC908KX8MDWE （相同外形與佔位） — 差異在於 Core, Manufacturer, Product Type.
此產品無可直接替換的替代品。
申請替代品MC908KX8MDWE 最大額定值與電氣特性
| Product Type | 8-bit microcontroller |
| Architecture | CISC |
| Core | HC08 |
| Processor Series | HC08KX |
| 資料匯流排寬度 | 8 bit |
| Maximum Internal Bus Frequency | 8 MHz |
| On-Chip Flash Memory | 8 KB (8K x 8) |
| On-Chip ROM Memory | Up to 12 KB for HC08K family |
| On-Chip Random-Access Memory | Up to 384 bytes for HC08K family |
| 供應電壓 | 3.3 V / 5 V |
| 封裝 | 16-pin SOIC |
| Package Width | 7.50 mm |
| Package Body Length | 0.295 inch (7.50 mm) |
| 安裝類型 | Surface mount |
| Manufacturer | NXP Semiconductors |
| 生命週期狀態 | End of life |
MC908KX8MDWE 0.295 inch (7.50 mm) 腳位配置指南
MC908KX8MDWE（0.295 inch (7.50 mm) 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： MC908KX8MDWE.
請參閱 資料表 以查看完整腳位配置。
典型應用
MC908KX8MDWE 適用於 6 應用s: Legacy Appliance Control, Industrial Sensor Interface, Small Motor Sequencing, LED and Keypad User Interface, Battery-Powered Control Module, Legacy Communication Gateway.
Legacy Appliance Control
MC908KX8MDWE fits a compact appliance-control role when an existing HC08K board, firmware, or peripheral arrangement must be preserved. Its confirmed 8 MHz internal bus is suitable for deterministic control loops, while 8 KB flash provides limited firmware storage for sequencing, mode selection, and actuator commands. The 16-pin SOIC package also matches the format listed for this MPN. Because detailed timer, I/O, and electrical limits are not present in the supplied evidence, reuse is best approached through schematic and firmware comparison rather than assumption.
推薦
Industrial Sensor Interface
MC908KX8MDWE can serve as the low-level controller in a small industrial sensor interface when the design is based on an existing HC08K platform. The 8-bit CISC architecture is appropriate for reading discrete inputs, coordinating sensor-enable signals, and managing relay or indicator outputs rather than performing high-bandwidth signal processing. The verified 8 MHz internal bus provides a defined performance reference, but input thresholds, ADC resources, timer channels, and I/O mappings must be checked in the exact datasheet before using the MCU in a new safety-related installation.
推薦
Small Motor Sequencing
For a compact stepper or relay sequencing design, MC908KX8MDWE can provide centralized low-speed control if the existing HC08K implementation already uses its supported timer and I/O resources. The 8 MHz bus and 8-bit CISC core are suitable for deterministic command sequencing and state-machine logic, while 16-pin SOIC packaging supports compact controller boards. The evidence does not confirm motor-specific timer outputs, PWM channels, or electrical drive ratings, so external drivers and protection must be designed independently and validated against the exact device documentation.
推薦
LED and Keypad User Interface
MC908KX8MDWE is suitable for a simple keypad and LED user interface in a legacy control product because its confirmed 8-bit architecture and 8 MHz internal bus can handle scanning, debouncing, state management, and display-indicator updates. The 8 KB flash capacity limits the size of the application, so the firmware should avoid unnecessary libraries and prioritize direct hardware control. Pin multiplexing, debounce timing, and the number of available I/O pins remain unverified in the supplied data and should be established from the datasheet and package drawing.
推薦
Battery-Powered Control Module
MC908KX8MDWE can be evaluated for a battery-powered control module when the original HC08K board already uses its 3.3 V or 5 V operating environment. The 8 MHz internal bus and 8-bit CISC architecture can support low-duty-cycle control and periodic sensor polling, but the supplied evidence does not provide sleep current, active current, or battery-life specifications. Power-budget calculations must therefore use verified datasheet values before deployment. Consider the EOL status when selecting a long-life battery product and plan a migration path.
推薦
Legacy Communication Gateway
MC908KX8MDWE may be used in a small legacy gateway that bridges a simple sensor or control bus, provided the existing firmware and hardware design already match the HC08K resource limits. The 8 KB flash capacity can hold compact protocol handlers, while the 8-bit CISC core supports straightforward command processing. However, no verified UART, SPI, I2C, timer, or pin multiplexing data is included here. The MCU should not be selected as a new communications gateway until its exact interface resources, baud-rate limits, and package connections are confirmed.
推薦
推薦產品摘要
工程參考資料，適用於 MC908KX8MDWE — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 |
|---|---|
| Package | 16-pin SOIC |
| Brand | NXP Semiconductors |
| Processor Architecture | 8-bit CISC HC08 |
| Maximum Internal Bus Frequency | 8 MHz |
| On-Chip Flash Memory | 8 KB (8K x 8) |
| Data Bus Width | 8 bit |
| Supply Voltage | 3.3 V / 5 V |
| Lifecycle Status | End of Life |
| Mounting Type | Surface mount |
| Verified Reference Price | $7.4355 as of 2026-10-21 |
主要差異化特點
- Legacy-specific HC08K software lineage (對比MC908QB8CDWE)
- Compact 16-pin SOIC implementation (對比MC908QY4ACDWE)
- Known supply listing for maintenance procurement (對比Newer MCU family candidates)
設計說明
Do not treat MC908 family similarity as proof of replaceability. MC908QB8CDWE and MC908QY4ACDWE appear in the site MPN list, but the supplied evidence does not establish identical pin mapping, memory organization, peripheral resources, voltage limits, or timing. Compare the manufacturer package drawings and register definitions before substituting either part. For an existing PCB, verify every power, ground, reset, oscillator, I/O, and programming connection rather than relying on the MC908 family prefix.
The verified listings identify 3.3 V and 5 V operation for MC908KX8MDWE, but they do not provide exact operating limits, active current, sleep current, or regulator requirements. Before schematic release, obtain the manufacturer datasheet and define the power source, tolerance, startup behavior, decoupling, and brownout margin. Estimated current consumption must be calculated from the actual operating mode and measured peripheral loads rather than inferred from the 8 MHz clock frequency.
Use the official 16-pin SOIC footprint and pin-1 marking from the manufacturer drawing. Preserve the exposed pad notation only if it is actually part of the exact package; MC908KX8MDWE is identified as a 16-pin SOIC, not as an exposed-pad device. Check pin orientation against the board silkscreen and assembly drawing, especially when reviving a legacy board. Confirm that the footprint, solder mask, paste pattern, and courtyard clearance support the supplier’s actual component drawing.
The supplied data does not state the package thermal resistance, maximum junction temperature, or power dissipation. Do not calculate thermal performance from the SOIC name alone. Use the exact datasheet thermal ratings, the actual ambient temperature, copper area, airflow, and measured operating current. Estimated: junction-temperature rise equals device power dissipation multiplied by the applicable thermal resistance, but both inputs must come from verified data before that estimate is used for design signoff.
When laying out a new board around this legacy MCU, place decoupling and clock-related components according to the exact manufacturer reference design once it is located. Keep potential high-current outputs and switching nodes away from sensitive signal paths, preserve short ground-return paths, and provide accessible test points for programming and debug. The verified data does not identify programming pins, oscillator pins, or peripheral assignments, so these must be resolved before routing the PCB.
合規資訊
The supplied verified results identify the manufacturer and product category but do not provide reliable, exact compliance status values for this ordering code. Compliance must be confirmed from NXP documentation for the exact MPN.