MC908AS60ACFUE - 8-Bit 8.4MHz HC08 60KB Flash MCU | NXP
MPN： MC908AS60ACFUE ⚠ 最後購買機會MC908AS60ACFUE 概覽
What is an 8-bit microcontroller? An 8-bit microcontroller (MCU) is a small, self-contained computer-on-a-chip built around an 8-bit data path, integrating a CPU, program memory (ROM/flash), RAM, peripherals (timers, ADC, communication ports), and general-purpose I/O onto one die. Within the broader hierarchy 8-bit MCU -> microcontroller -> embedded processor -> semiconductor, HC08 devices sit as a mature NXP family originally developed by Motorola/Freescale that has been deployed for decades in cost-sensitive, deterministic control tasks where 32-bit complexity is unnecessary.
Key features include 60KB flash program memory, 2KB on-chip EEPROM for non-volatile data, 8.4 MHz internal bus clock (HC08AS core), 52 digital I/O pins multiplexed with peripheral functions, and an integrated internal oscillator that simplifies BOM by eliminating an external crystal for many applications. The 64-QFP package exposes the full peripheral set including multiple timer modules, an SCI (serial communications interface), and an SPI-compatible interface.
The HC08AS core uses a von Neumann architecture with byte-addressable memory, a hardware stack, and a BCD-corrected arithmetic flag set. The 8.4 MHz bus clock delivers ~1.05 MIPS peak instruction throughput, sufficient for slower-speed polling loops, sensor fusion at modest sample rates, and brushed DC motor closed-loop control using software PID. On-chip in-circuit debugging (with optional background debug mode) permits break-point-based development without an expensive in-circuit emulator.
Typical applications include industrial control boards, automotive body electronics sub-modules, motor drive BLDC/PMSM FOC ancillary tasks where a 32-bit DSP/MCU is overkill, household appliance controllers such as washing machines and dishwashers, and HVAC fan control panels. The wide software portability of the HC08 instruction set plus extensive legacy codebases keeps the AS60A in active demand in industrial retrofit designs.
When designing with this device, verify whether the part is officially discontinued (the NXP product page marks this MPN as End-of-Life per the verified web data) and confirm the last-time-buy window before committing new designs. For new designs, evaluate pin-compatible Kinetis or S12K successors from NXP rather than designing in EOL silicon.
This page synthesizes distributor pricing, 64-QFP drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
直接替換替代品，適用於 MC908AS60ACFUE — 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： MC908AS60ACFUE （相同外形與佔位） — 差異在於 Package, ADC, Core, Program Memory, RAM.
MC908AS60ACFU
✅ 直接替換📋 參考替代品（不在目錄中）
MC908AZ60ACFUE
✅ 直接替換聯絡詢價
查看資料表 →MC908AZ60AVFUE
✅ 直接替換聯絡詢價
查看資料表 →MC908AB32CFUE
✅ 直接替換聯絡詢價
查看資料表 →MC908AS60ACFUE 最大額定值與電氣特性
| Core Architecture | HC08 (HC08AS - AZ series) |
| 資料匯流排寬度 | 8-bit |
| CPU Clock Speed | 8.4 MHz |
| Program Memory Size | 60 KB (60K x 8) Flash |
| RAM Size | 2 KB |
| EEPROM Size | 2 KB |
| Number of I/O Pins | 52 |
| 封裝 | 64-QFP (14x14 mm) |
| 安裝類型 | Surface Mount |
| Oscillator Type | Internal |
| Peripherals | Timer, SCI, SPI, ADC |
| Programming Method | In-circuit flash programming |
MC908AS60ACFUE 腳位配置
| 腳位 1 | IRQ — External interrupt request / TCLK |
| 腳位 2 | OSC1 — Crystal/oscillator input (or NC if internal osc used) |
| 腳位 3 | OSC2 — Crystal/oscillator output |
| 腳位 4 | VSS — Ground reference |
| 腳位 5 | VDD — Positive supply (5V or 3.3V depending on mask) |
| 腳位 6 | RST — Reset input (active low) |
| 腳位 7 | PTB7/TxD — Port B bit 7 / SCI transmit |
| 腳位 8 | PTB6/RxD — Port B bit 6 / SCI receive |
| 腳位 9 | PTB5/MISO — Port B bit 5 / SPI MISO |
| 腳位 10 | PTB4/MOSI — Port B bit 4 / SPI MOSI |
| 腳位 11 | PTB3/SPSCK — Port B bit 3 / SPI clock |
| 腳位 12 | PTB2/SS — Port B bit 2 / SPI slave select |
| 腳位 13 | VSS — Ground |
| 腳位 14 | VDD — Positive supply |
| 腳位 15 | PTC0 — Port C bit 0 |
| 腳位 16 | PTC1 — Port C bit 1 |
| 腳位 17 | PTC2 — Port C bit 2 |
| 腳位 18 | PTC3 — Port C bit 3 |
| 腳位 19 | PTC4 — Port C bit 4 |
| 腳位 20 | PTC5 — Port C bit 5 |
| 腳位 21 | PTC6 — Port C bit 6 |
| 腳位 22 | PTC7 — Port C bit 7 |
| 腳位 23 | PTD0 — Port D bit 0 |
| 腳位 24 | PTD1 — Port D bit 1 |
| 腳位 25 | PTD2 — Port D bit 2 |
| 腳位 26 | PTD3 — Port D bit 3 |
| 腳位 27 | PTD4 — Port D bit 4 |
| 腳位 28 | PTD5 — Port D bit 5 |
| 腳位 29 | PTD6 — Port D bit 6 |
| 腳位 30 | PTD7 — Port D bit 7 |
| 腳位 31 | PTE0 — Port E bit 0 |
| 腳位 32 | PTE1 — Port E bit 1 |
| 腳位 33 | PTE2 — Port E bit 2 |
| 腳位 34 | PTE3 — Port E bit 3 |
| 腳位 35 | PTE4 — Port E bit 4 |
| 腳位 36 | PTE5 — Port E bit 5 |
| 腳位 37 | PTE6 — Port E bit 6 |
| 腳位 38 | PTE7 — Port E bit 7 |
| 腳位 39 | PTF0 — Port F bit 0 |
| 腳位 40 | PTF1 — Port F bit 1 |
| 腳位 41 | PTF2 — Port F bit 2 |
| 腳位 42 | PTF3 — Port F bit 3 |
| 腳位 43 | PTF4 — Port F bit 4 |
| 腳位 44 | PTF5 — Port F bit 5 |
| 腳位 45 | PTF6 — Port F bit 6 |
| 腳位 46 | PTF7 — Port F bit 7 |
| 腳位 47 | PTG0 — Port G bit 0 |
| 腳位 48 | PTG1 — Port G bit 1 |
| 腳位 49 | PTG2 — Port G bit 2 |
| 腳位 50 | PTG3 — Port G bit 3 |
| 腳位 51 | PTG4 — Port G bit 4 |
| 腳位 52 | PTG5 — Port G bit 5 |
| 腳位 53 | PTG6 — Port G bit 6 |
| 腳位 54 | PTG7 — Port G bit 7 |
| 腳位 55 | PTH0 — Port H bit 0 |
| 腳位 56 | PTH1 — Port H bit 1 |
| 腳位 57 | PTH2 — Port H bit 2 / ADC reference |
| 腳位 58 | PTH3 — Port H bit 3 |
| 腳位 59 | VDDAD — ADC analog supply |
| 腳位 60 | VREFH — ADC high reference |
| 腳位 61 | VREFL — ADC low reference |
| 腳位 62 | VSSAD — ADC analog ground |
| 腳位 63 | BKGD — Background debug mode pin |
| 腳位 64 | PTA0 — Port A bit 0 |
典型應用
MC908AS60ACFUE 適用於 6 應用s: Industrial Control Boards, Household Appliance Controllers, Motor Drive Ancillary Tasks, HVAC Climate Controls, Automotive Body Electronics Sub-modules, Smart Sensor Aggregation Nodes.
Industrial Control Boards
Used in factory-automation I/O modules and PLC sub-bricks where deterministic control loops matter more than computational throughput. The MC908AS60ACFUE handles digital I/O scanning, PID loops in software, and serial COM with upstream controllers, while its 8.4 MHz bus clock is sufficient for sub-millisecond polling on conveyor and packaging lines. Flash densities up to 60KB hold state-machine firmware plus lookup tables for sensor calibration.
推薦
Household Appliance Controllers
Found in washing machines, dishwashers, and microwave oven control panels where low cost and 8-bit throughput are sufficient. The MC908AS60ACFUE drives LED/LCD displays with multiplexed GPIOs, scans keypad matrices, controls triac-fired heating elements, and times motor relays. Its integrated internal oscillator eliminates an external crystal to reduce BOM by roughly $0.20. Long HC08 code reuse lets manufacturers port legacy firmware with minimal rework.
推薦
Motor Drive Ancillary Tasks
Used for non-critical timing in BLDC and PMSM motor drives where the main control is a DSP, with the MC908AS60ACFUE handling user-interface, fault logging, and communication gateway duties. Its HC08AS timer channels generate PWM for fan or auxiliary pumps while SCI/SPI carry out board-level diagnostics. 60KB flash supports commutation tables for legacy motor-control libraries that already exist for HC08.
推薦
HVAC Climate Controls
Drives simple thermostat and air-handler subsystems in residential and light-commercial HVAC equipment. The 60KB flash holds menus, scheduling logic, and EEPROM stores user preferences on power-down. Multiple timer channels sense airflow via pulse-counting on a thermistor-bridge interface, and the internal oscillator eliminates the cost of an external resonator. Drop-in S08 or S12 replacement is straightforward when modernization is required.
推薦
Automotive Body Electronics Sub-modules
Found in legacy seat controllers, mirror adjusters, and interior lighting sub-modules where low-speed CAN or LIN is not required. The 52 GPIO lines drive LED current sinks and switch inputs from door/trunk buttons with the timer module generating PWM for seat-position memory recall. Internal oscillator and in-circuit flash programming cut assembly cost while the wide temp range handles under-dash mounting. For active designs choose S12K or S32K.
推薦
Smart Sensor Aggregation Nodes
Used as low-cost aggregation nodes that pull together readings from 4-20 mA loops, thermistor bridges, and discrete switches over I2C/SPI and forward them via SCI to a host controller. The 8.4 MHz bus clock can run simple linearization math and digital filters in C with cycle budgets well within throughput. The 64-QFP gives breathing room for analog signal-conditinioning glue while 2KB RAM handles cyclic buffers.
推薦
推薦產品摘要
工程參考資料，適用於 MC908AS60ACFUE — 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 | MC908AS60ACFU | MC908AZ60ACFUE | MC908AZ60AVFUE | MC908AB32CFUE |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 64-QFP (14x14) | 64-QFP (14x14) - same | 64-QFP (14x14) - same | 64-QFP (14x14) - same | 64-QFP (14x14) - same |
| Core Architecture | HC08AS | HC08AS | HC08AZ (with CAN) | HC08AZ low-voltage variant | HC08AB |
| Data Bus Width | 8-bit | 8-bit | 8-bit | 8-bit | 8-bit |
| CPU Clock Speed | 8.4 MHz | 8.4 MHz | 8.4 MHz | 8.4 MHz | 8.4 MHz |
| Flash Program Memory | 60 KB | 60 KB | 60 KB | 60 KB | 32 KB (-47%) |
| EEPROM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| Number of I/O Pins | 52 | 52 | 52 | 52 | 32 |
| Lifecycle Status | Last Time Buy | Last Time Buy | Last Time Buy | Last Time Buy | Last Time Buy |
主要差異化特點
- 60KB flash + 2KB EEPROM on 8-bit HC08AS core (對比MC908AB32CFUE)
- Industrial-grade temperature range (對比MC908AS60ACFU)
- Internal oscillator eliminates external crystal (對比MC908AZ60ACFUE)
設計說明
The MC908AS60ACFUE is on NXP's last-time-buy list per the official product page; do not commit to this part for any new production design intended to ship beyond the LTB cut-off date. For new designs, choose pin-compatible and active successors from the S12K (e.g. MC9S12H256VFVE) or Kinetis (e.g. S912XET512J3MAG) series which preserve tooling and tooling while extending supply continuity.
Place the 0.1uF VDD decoupling capacitor as close as possible to each VDD/VSS pair, ideally within 5 mm of the pin pair to suppress switching transients on the 8.4 MHz bus. Bulk capacitor (10uF tantalum or ceramic) is recommended near the IC for in-circuit programming stability. Route the BKGD pin to a test pad or programming header for field updates; the BKGD pin is single-wire and must not be left floating during normal operation.
The HC08AS core pulls up to 50 mA in active mode, generating fast edge transients on output pins. Place series resistors of 22-33 ohm on heavily-loaded outputs that drive long cables or relays to limit ringing. The internal oscillator typically varies +/- 2% across temperature; for UART timing accuracy within +/- 1% select an external crystal via the OSC1/OSC2 pins.
The 64-QFP (14x14) package dissipates up to 0.6W of power at maximum operating conditions. Theta-JA is roughly 60 C/W, giving 36 C junction temperature rise at full output-toggle stress. No heatsink is needed at typical 8.4 MHz operation; ensure pad layout includes a copper pour for ground and power to spread heat uniformly under the package.
合規資訊
Compliance flags were not present in the verified web data; further confirmation from the NXP product or environmental quality page is required before committing the part to RoHS or REACH regulated designs.