MC908MR32VBE - 8-Bit 8MHz 32KB MCU | NXP | 56-SDIP
MPN： MC908MR32VBE ✓ 啟用中MC908MR32VBE 概覽
What is an 8-bit CISC microcontroller? An 8-bit CISC MCU is a compact embedded controller that executes instructions over an 8-bit data path, integrating processor core, program memory, data memory, peripherals, and interrupt-control functions on one semiconductor device. MC908MR32VBE belongs to the HC08 microcontroller family and is used where deterministic control, serial communication, and cost-effective through-hole assembly are more important than high processing bandwidth.
Verified specifications include an HC08 core, 8-bit data-bus width, 8 MHz maximum clock frequency, 32 KB flash memory, 5 V supply, and a 56-pin SPDIP package. The flash-memory organization is listed as 32K x 8. The part is suitable for legacy peripheral controllers, communication interfaces, small automation controllers, and industrial equipment where the HC08 toolchain and existing board layout are already established.
The HC08 architecture provides a practical platform for embedded control because firmware can combine basic digital I/O, timers, serial communication, and application-specific logic in one device. Because the verified data does not specify RAM size, timer counts, I/O levels, electrical limits, or detailed peripheral assignments, those parameters remain marked as data needed rather than inferred. Engineers should consult the manufacturer documentation before finalizing memory, timing, or peripheral assignments.
Typical implementation uses the 56-pin SPDIP package for through-hole PCB assembly, programming access, and serviceability. The package is more mechanically accessible than a fine-pitch surface-mount option, but its larger footprint requires additional board area. The 8 MHz clock and 8-bit architecture are appropriate for control loops that do not require high-speed graphics, networking throughput, or complex real-time processing.
A key design consideration is preserving the exact HC08 device variant, clock configuration, reset behavior, and peripheral mapping when replacing an existing MC908MR32VBE. Do not treat a similarly named HC08 device with a different package or memory organization as a drop-in replacement. This page combines verified distributor information with application context and explicitly identifies parameters that still require manufacturer confirmation.
直接替換替代品，適用於 MC908MR32VBE — 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： MC908MR32VBE （相同外形與佔位） — 差異在於 Core.
此產品無可直接替換的替代品。
申請替代品MC908MR32VBE 最大額定值與電氣特性
| Product Type | 8-bit CISC microcontroller |
| Core | HC08 |
| Processor Series | HC08MR |
| 資料匯流排寬度 | 8 bit |
| 最大時脈頻率 | 8 MHz |
| Flash Memory | 32 KB (32K x 8) |
| 供應電壓 | 5 V |
| 封裝 | 56-pin SPDIP |
| Package Type | Through-hole SPDIP |
| Manufacturer | NXP Semiconductors |
| Legacy Manufacturer | Freescale Semiconductor |
| Connectivity | SCI, SPI |
| Architecture | CISC |
| Memory Organization | 32K x 8 flash |
MC908MR32VBE through-hole spdip 腳位配置指南
MC908MR32VBE（through-hole spdip 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： MC908MR32VBE.
請參閱 資料表 以查看完整腳位配置。
典型應用
MC908MR32VBE 適用於 6 應用s: Legacy Industrial Control, Serial Communication Interface, Small Automation Controller, Instrumentation and Measurement Module, Legacy Communication Adapter, Serviceable Through-Hole Embedded Board.
Legacy Industrial Control
The MC908MR32VBE fits legacy industrial-control boards that already use the HC08 architecture and require a serviceable through-hole controller. Its verified 8 MHz clock and 8-bit CISC core are suited to sequential logic, supervisory control, and basic closed-loop tasks rather than high-throughput processing. The 32 KB flash memory provides room for application firmware, while SCI and SPI connectivity can support external modules. The 56-pin SPDIP format simplifies inspection and replacement in legacy equipment, although the exact I/O, timer, and interrupt assignments must be confirmed from the manufacturer pinout.
推薦
Serial Communication Interface
Use MC908MR32VBE where an HC08-based system needs a compact serial-control node with SCI or SPI connectivity. The verified 8 MHz maximum clock provides timing margin for byte-oriented communication and low-bandwidth peripheral protocols, while the 32 KB flash footprint supports firmware for framing, command parsing, and device monitoring. The exact baud-rate range, SPI mode, and peripheral pin mappings are not supplied and must be obtained from the manufacturer documentation. In a new design, a newer MCU may offer more integrated connectivity and smaller packaging.
推薦
Small Automation Controller
MC908MR32VBE can serve as the central controller in a compact automation module when the board already uses HC08 firmware and a 56-pin SPDIP footprint. Its verified 8-bit CISC architecture is appropriate for state machines, actuator sequencing, input debouncing, and supervisory logic. The 32 KB flash allocation is meaningful for small embedded programs, but RAM and detailed timer resources remain unspecified. Engineers should confirm interrupt latency, I/O levels, watchdog behavior, and electrical limits before assigning safety- or production-critical functions.
推薦
Instrumentation and Measurement Module
The MC908MR32VBE is potentially suitable for legacy measurement equipment that already depends on its HC08 peripherals and through-hole package. Its 8 MHz clock can support control and communication tasks around slower sensors, displays, or measurement interfaces, while 32 KB flash provides room for calibration and control code. The verified data does not specify ADC functions, timer resolution, RAM, or analog peripherals, so this application requires datasheet-level confirmation. A replacement should be selected only after checking signal conditioning, grounding, timing, and connector assignments.
推薦
Legacy Communication Adapter
MC908MR32VBE can be used in an older communication adapter when protocol handling and HC08 software support justify maintaining the MCU. Verified SCI and SPI connectivity provides the basis for connecting a local sensor, transceiver, or peripheral bus, while the 8 MHz clock handles moderate protocol timing. The package's through-hole format supports repairable industrial boards and prototype fixtures. Because maximum I/O, serial timing, and electrical characteristics are not provided in the retrieved data, validate them from the official datasheet and preserve the existing firmware unless the replacement is proven equivalent.
推薦
Serviceable Through-Hole Embedded Board
The 56-pin SPDIP package makes MC908MR32VBE useful for prototypes, repair assemblies, and legacy boards where through-hole serviceability is preferred. A technician can inspect or replace the device without fine-pitch rework, and the 8-bit HC08 platform supports established embedded codebases. The verified 32 KB flash and 8 MHz clock are sufficient for many control-oriented applications, but the larger package consumes board area compared with modern surface-mount MCUs. Before assembly, confirm pin numbering, orientation, supply rails, oscillator connections, and programming access from the manufacturer documentation.
推薦
推薦產品摘要
工程參考資料，適用於 MC908MR32VBE — 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 | 56-pin SPDIP |
| Brand | NXP Semiconductors |
| Core | HC08 |
| Data Bus Width | 8 bit |
| Maximum Clock Frequency | 8 MHz |
| Flash Memory | 32 KB (32K x 8) |
| Supply Voltage | 5 V |
| Connectivity | SCI, SPI |
| Price Reference | 10.4590 USD as of 2026-10-21 |
| Drop-In Compatibility | No verified replacement in supplied data |
主要差異化特點
- Verified HC08MR identity (對比MC908AP8CBE)
- Through-hole legacy integration (對比Newer surface-mount 8-bit MCUs)
- Established serial connectivity profile (對比MC908AP32ACFBE)
設計說明
Preserve the existing 56-pin SPDIP footprint, pin numbering, and board keep-outs before treating any MC908 or HC08-family device as a substitute. Verify every power, ground, oscillator, reset, programming, serial, and peripheral connection against the official pinout. A matching package name alone does not establish pin-to-pin compatibility.
The verified device is identified as a 5 V MCU, but the supplied data does not state input-voltage tolerance, supply current, or I/O drive capability. Check the original schematic and manufacturer electrical characteristics before adding peripherals or selecting pull-ups. Do not infer 3.3 V compatibility from the HC08 family name.
Do not substitute MC908AP32ACFBE, MC908AP8CBE, or another similarly named HC08 device based only on shared 8-bit, 8 MHz characteristics. Confirm flash size, RAM, package, pin assignments, reset behavior, peripherals, clock requirements, and programming procedure. The supplied comparison pages establish family similarity, not drop-in equivalence.
合規資訊
The supplied distributor results do not provide definitive compliance declarations for the exact MC908MR32VBE device. Verify current manufacturer or distributor documentation before procurement.
