MC908KX8MDWE - 8MHz 8KB Flash 8-Bit MCU | NXP
料号： MC908KX8MDWE ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $7.4355 | $7.44 |
| 10 | $7.4355 | $74.36 |
| 100 | $7.4355 | $743.55 |
| 500 | $7.4355 | $3,717.75 |
| 1,000 | $7.4355 | $7,435.50 |
MC908KX8MDWE 概述
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.
直接替换替代料： MC908KX8MDWE ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： MC908KX8MDWE （相同外形与封装尺寸） ——差异在于 Core, Manufacturer, Product Type.
快速对比工具——选择替代料号进行并排对比：
该产品暂无直接替换替代料。
请求替代料MC908KX8MDWE 最大额定值与电气特性
| Product Type | 8-bit microcontroller |
| Architecture | CISC |
| Core | HC08 |
| Processor Series | HC08KX |
| 数据总线宽度 | 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 |
| 电源电压 | 3.3 V / 5 V |
| 封装 | 16-pin SOIC |
| Package Width | 7.50 mm |
| Package Body Length | 0.295 inch (7.50 mm) |
| 安装类型 | Surface mount |
| Manufacturer | NXP Semiconductors |
| 生命周期状态 | End of life |
MC908KX8MDWE 0.295 inch (7.50 mm) 引脚配置指南
MC908KX8MDWE（0.295 inch (7.50 mm) 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： MC908KX8MDWE.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MC908KX8MDWE 适用于 6 应用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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： MC908KX8MDWE ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 |
|---|---|
| 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 |
关键差异点
- Legacy-specific HC08K software lineage （对比 MC908QB8CDWE)
- Compact 16-pin SOIC implementation （对比 MC908QY4ACDWE)
- Known supply listing for maintenance procurement （对比 Newer MCU family candidates)
设计说明
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.
合规信息
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.
