MC908AB32MFUE - 8-Bit 8MHz 32KB Flash MCU | NXP
MPN： MC908AB32MFUE ✗ 停產MC908AB32MFUE 概覽
A microcontroller is a programmable semiconductor that combines a CPU, nonvolatile program memory, data memory, and peripherals on one integrated circuit. The MC908AB32MFUE sits in the hierarchy MCU → 8-bit microcontroller → M68HC08 family → HC08AB family. It is suited to compact embedded-control systems where an 8-bit architecture, integrated data storage, and a moderate pin count are more useful than high processing bandwidth.
The verified device data identifies 32 KB of Flash organized as 32K x 8, 1K x 8 RAM, 51 I/O pins, 8 MHz speed, and a 64-QFP package. A search result also describes 512 bytes of EEPROM, while the broader family data indicates embedded EEPROM or Flash storage for user data. Exact operating voltage, peripherals, timer resources, and electrical limits are not present in the supplied evidence and must be confirmed from the manufacturer datasheet before schematic release.
Typical embedded uses include appliance controllers, simple motor-control logic, industrial interfaces, keypad and display systems, and low-cost automation nodes. Its 51 I/O pins provide useful parallel connectivity for sensors, indicators, communications peripherals, and discrete control signals. The 8 MHz CPU and 32 KB Flash footprint favor compact control firmware rather than graphics-intensive, high-bandwidth, or safety-critical workloads.
The most important design step is lifecycle planning. Because the NXP page states End of Life, engineers should preserve the footprint, verify stock provenance, confirm suffix-specific temperature and qualification requirements, and assess whether a redesign is preferable to relying on obsolete inventory. Do not infer pin compatibility from package similarity alone; use the exact datasheet pin table and validate every replacement electrically and in firmware.
This page consolidates verified manufacturer and distributor information, strict replacement findings, package facts, lifecycle status, and engineering guidance. It separates confirmed values from unavailable parameters so procurement and design teams can identify what must still be checked before purchasing or committing a PCB.
直接替換替代品，適用於 MC908AB32MFUE — 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： MC908AB32MFUE （相同外形與佔位） — 差異在於 Package, Program Memory Size, Supply Voltage, RAM Size, Architecture.
MC908AB32CFUE
✅ 直接替換聯絡詢價
查看資料表 →MC68HC908AB32CFU
✅ 直接替換📋 參考替代品（不在目錄中）
MC908AP64CFAER528
✅ 直接替換聯絡詢價
查看資料表 →MC9S12C64MFUE
✅ 直接替換聯絡詢價
查看資料表 →MC9S12D64MFUER
✅ 直接替換聯絡詢價
查看資料表 →MC908AB32MFUE 最大額定值與電氣特性
| Product Type | 8-bit microcontroller unit (MCU) |
| Series | HC08 / HC08AB |
| CPU | Enhanced M68HC08 CPU08 |
| Maximum Clock Speed | 8 MHz |
| Program Memory Type | Flash |
| Program Memory Size | 32 KB (32K x 8) |
| RAM Size | 1 KB (1K x 8) |
| EEPROM | 512 bytes |
| Number of I/O | 51 pins |
| 封裝 | 64-QFP (14 x 14 mm) |
| 安裝類型 | Surface mount |
| Architecture | 8-bit |
MC908AB32MFUE 64-qfp (14 x 14 mm) 腳位配置指南
MC908AB32MFUE（64-qfp (14 x 14 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： MC908AB32MFUE.
請參閱 資料表 以查看完整腳位配置。
典型應用
MC908AB32MFUE 適用於 7 應用s: Legacy appliance control, Simple motor and relay control, Industrial sensor interface, Keypad and display interface, Compact automation controller, Battery-powered embedded node, Communication gateway interface.
Legacy appliance control
The MC908AB32MFUE fits an existing appliance controller because its 8 MHz CPU08 supports compact real-time logic, while 32 KB of Flash stores application firmware and 1 KB of RAM supports short working states. The 51-I/O count can connect keys, indicators, sensors, and discrete control stages without a large external interface controller. Because the device is end of life, prefer it for repair and lifecycle-extension work rather than a new platform. Before reusing the board, verify exact pin functions, voltage limits, oscillator requirements, and programming compatibility from the NXP datasheet.
推薦
Simple motor and relay control
The MC908AB32MFUE can manage discrete sequencing for relays, solenoids, or small motor-control stages where deterministic low-level logic is sufficient. Its 51 I/O pins provide parallel control capacity, and the 8 MHz CPU supports fast polling and basic protection sequences. It does not replace a dedicated motor driver or high-performance real-time control loop. Verify output-drive limits, timing, watchdog behavior, and isolation before connecting inductive loads; suitable gate drivers and protection components should be selected separately from the MCU data.
推薦
Industrial sensor interface
The 51 available I/O pins make the MC908AB32MFUE useful in a legacy sensor-conditioning node where switches, discrete sensors, alarm inputs, and status outputs share one controller. Its 32 KB Flash and 1 KB RAM are adequate for compact acquisition and filtering code but constrain modern connectivity and buffering. The 8 MHz class is appropriate for modest polling rates, not high-bandwidth sampling. Maintain the original board architecture because replacing this end-of-life MCU with a different architecture can require pin reassignment, firmware changes, clock adaptation, and complete functional validation.
推薦
Keypad and display interface
In an existing keypad-and-display product, the MC908AB32MFUE can scan switches, update LEDs, and manage a simple display interface through its broad I/O complement. The 32 KB Flash footprint accommodates menu logic, key mapping, debounce routines, and basic diagnostics, while 1 KB of RAM remains the key resource constraint. Parallel I/O use can reduce external multiplexing, although timing and current limits must follow the exact electrical specification. For a new design, favor an active MCU with more memory and a supported display ecosystem to avoid deepening an end-of-life dependency.
推薦
Compact automation controller
The MC908AB32MFUE is suitable for maintaining a compact automation controller with distributed digital inputs, relay outputs, status feedback, and a simple supervisory loop. Its 8 MHz CPU and 51 I/O pins provide adequate parallelism for low-bandwidth tasks, while 32 KB Flash supports compact control firmware. Reliability design should include watchdogs, fail-safe output states, and validated I/O levels because generic product snippets do not establish the complete peripheral or safety specification. Given end-of-life status, use it only where existing hardware continuity and proven software outweigh new-platform benefits.
推薦
Battery-powered embedded node
The MC908AB32MFUE may serve in an existing low-duty-cycle embedded node where periodic sensor sampling and local logic are more important than continuous processing. Its 8 MHz architecture and 32 KB Flash can implement simple state machines, while sleep-mode suitability and active current must be checked in the complete datasheet before estimating battery life. The 51 I/O pins are useful for sparse sensor nodes but consume board area and can increase leakage-sensitive routing complexity. Validate low-power behavior, temperature range, and supply regulation rather than assuming suitability from clock speed alone.
推薦
Communication gateway interface
The MC908AB32MFUE can handle basic framing, status, and control tasks around a discrete communications transceiver in an existing HC08AB system. Its 51 I/O lines offer parallel UART, SPI, interrupt, and reset connections depending on the device's verified peripheral allocation. The 8 MHz class can support moderate protocol overhead but not high-throughput traffic, and 1 KB of RAM may constrain buffering. Because alternate-function mapping and electrical timing are not supplied, engineers must consult the exact datasheet and transceiver requirements before laying out or replacing the interface.
推薦
推薦產品摘要
工程參考資料，適用於 MC908AB32MFUE — 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 | MC908AB32CFUE | MC68HC908AB32CFU | MC908AP64CFAER528 | MC9S12C64MFUE | MC9S12D64MFUER |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 64-QFP (14 x 14 mm) | 64-QFP (14 x 14 mm) | 64-QFP (14 x 14 mm) | 64-QFP (14 x 14 mm) | 64-QFP (14 x 14 mm) | 64-QFP (14 x 14 mm) |
| CPU Class | 8-bit CPU08 | 8-bit HC08 | 8-bit HC08 | 8-bit HC08 family | 16-bit MC9S12 family | 16-bit MC9S12 family |
| Pin-to-Pin Verification | Original device | Not established by supplied data | Not established by supplied data | Not established by supplied data | Not established by supplied data | Not established by supplied data |
主要差異化特點
- Exact legacy identity for maintenance (對比MC908AB32CFUE)
- HC08AB resource profile (對比MC9S12C64MFUE)
- Broad confirmed parallel interface (對比MC68HC908AB32CFU)
設計說明
Do not approve a substitute from package size or headline memory data alone. Compare all pins in the original and candidate datasheets, including power, ground, reset, oscillator, programming, and alternate-function signals. The MC908AB32MFUE is end of life, so a sourcing alternative may also require firmware, timing, and BOM changes. Retain a known-good original device until electrical and functional equivalence has been demonstrated.
Preserve the original 64-QFP land pattern and routing unless the manufacturer package drawing confirms mechanical compatibility. QFP lead pitch, body size, courtyard, and exposed thermal requirements must match; the verified package description is 64-QFP, 14 x 14 mm, but its detailed drawing was not supplied. Inspect solderability, lead coplanarity assumptions, assembly profile, and supplier traceability before authorizing large end-of-life orders.
Verify supply voltage, I/O levels, oscillator arrangement, reset timing, and peripheral current from the exact datasheet before powering an assembled board. The supplied evidence confirms 3.3 V/5 V in a comparison snippet but does not establish every operating limit or suffix condition, so no universal rail recommendation is made. Include local decoupling and power-sequence checks in bring-up, especially when sourcing aged inventory.
For existing HC08AB boards, keep sensitive clock and reset routing short and preserve the proven grounding and decoupling arrangement. If migrating to a different MCU family, treat it as a redesign rather than a footprint swap: budget, flash programming, interrupt vectors, timer resources, and peripheral mappings may differ. Validate EMI and signal integrity around external buses, and use current datasheets instead of inferred alternate functions.
End-of-life procurement creates counterfeit, remarked, stale, and traceability risks. Require seller provenance, date code, lot records, inspection results, and written warranty terms; incoming-test the MCU program and analog functions on representative production hardware. Avoid using a distributor search page as proof of current stock, authorized distribution, or manufacturer condition.
合規資訊
The supplied snippets do not provide explicit compliance declarations. One comparison source mentions RoHS and REACH, but no authoritative statement or exact target-device result is included.
