MC908AP8CBE - 8KB Flash 8-bit HC08 MCU 42-DIP | NXP
MPN: MC908AP8CBE ✗ Cuối đờiMC908AP8CBE Tóm tắt
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (FLASH/ROM), data memory (RAM), peripherals (ADC, timers, communication ports), and I/O on one die. The HC08 architecture sits under the broader taxonomy: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor IC. 8-bit MCUs remain widely deployed in cost-sensitive, low-power, deterministic-control applications such as appliance control, motor drivers, automotive body electronics, and industrial sensor conditioning where their simplicity and predictable interrupt response outperform more complex 32-bit parts.
Key features of the MC908AP8CBE include 8 KB FLASH for in-application or in-circuit reprogramming, 1 KB of static RAM for data and stack, a 10-bit successive-approximation ADC for analog sensing tasks, multiple timers and a serial communications interface (SCI), and a 42-pin SPDIP footprint that is breadboard-friendly for prototyping and field-service replacement. The part runs directly from a 3.3 V or 5 V rail without external oscillator components.
The HC08 core uses a von Neumann-style CISC architecture with a small instruction set, accumulator-based addressing and indexed modes, plus an integrated background debug module (BDM) that enables in-circuit programming and non-intrusive debugging through a single-wire interface. Internal oscillator trimming and watchdog operation reduce external component count and improve field reliability.
Typical applications include automotive body controllers, HVAC fan and damper drivers, appliance user-interface boards, low-cost industrial sensors, white-goods motor control, and legacy embedded platforms that need a long-lifecycle pin-compatible MCU. The 42-pin SPDIP package is also popular in educational kits and developer boards because it accepts standard IC sockets.
When designing with the MC908AP8CBE, plan for FLASH endurance and write timing in production firmware, and add proper decoupling (0.1 uF ceramic plus bulk) on VDD/VSS pins. The BDM pinout should be reserved on the PCB even if unused so that field updates and diagnostics are possible throughout the product lifecycle.
This page synthesizes distributor pricing from DigiKey/Mouser/LCSC, drop-in alternative listings from the same HC08 family, and practical engineering notes not found in a single manufacturer document - giving procurement and engineering teams a single reference point for sourcing and design-in decisions.
Bộ thay thế dễ dàng lắp đặt cho MC908AP8CBE — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với MC908AP8CBE (cùng hình factor và footprint) — khác nhau ở Mounting Type, Operating Temperature, Package, ADC, Program Memory Size.
MC908AP8ACBE
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC908AP16ACBE
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC908AP16CBE
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC68HC908JL8CSPE
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC908AP8CBE Tỷ lệ tối đa & tính chất điện
| Core Processor | HC08 |
| Core Size | 8-bit |
| Core Architecture | CISC |
| Program Memory Size | 8 KB (8K x 8) FLASH |
| RAM Size | 1 KB (1K x 8) |
| Maximum CPU Frequency | 8 MHz |
| Number of I/O | 30 |
| ADC | 10-bit |
| Oscillator Type | Internal |
| Điện áp cung cấp | 3.3 V / 5 V |
| Hộp / Vỏ | 42-SPDIP (0.600 in / 15.24 mm) |
| Kiểu lắp đặt | Through-Hole |
| Connectivity | SCI |
| Nhiệt độ hoạt động | -40C to +85C |
| Packaging | Tube |
Cấu hình chân MC908AP8CBE
| Chân 1 | IRQ — External interrupt request input |
| Chân 2 | PTA0 — Port A bit 0 (general I/O / ADC channel) |
| Chân 3 | PTA1 — Port A bit 1 (general I/O / ADC channel) |
| Chân 4 | PTA2 — Port A bit 2 (general I/O / ADC channel) |
| Chân 5 | PTA3 — Port A bit 3 (general I/O / ADC channel) |
| Chân 6 | PTA4 — Port A bit 4 (general I/O / ADC channel) |
| Chân 7 | PTA5 — Port A bit 5 (general I/O / ADC channel) |
| Chân 8 | PTA6 — Port A bit 6 (general I/O / ADC channel) |
| Chân 9 | PTA7 — Port A bit 7 (general I/O / ADC channel) |
| Chân 10 | VSS — Ground |
| Chân 11 | PTB0 — Port B bit 0 (general I/O) |
| Chân 12 | PTB1 — Port B bit 1 (general I/O) |
| Chân 13 | PTB2 — Port B bit 2 (general I/O) |
| Chân 14 | PTB3 — Port B bit 3 (general I/O) |
| Chân 15 | PTB4 — Port B bit 4 (general I/O) |
| Chân 16 | PTB5 — Port B bit 5 (general I/O) |
| Chân 17 | PTB6 — Port B bit 6 (general I/O) |
| Chân 18 | PTB7 — Port B bit 7 (general I/O) |
| Chân 19 | PTC0 — Port C bit 0 (general I/O / timer channel) |
| Chân 20 | PTC1 — Port C bit 1 (general I/O / timer channel) |
| Chân 21 | PTC2 — Port C bit 2 (general I/O / timer channel) |
| Chân 22 | PTC3 — Port C bit 3 (general I/O / timer channel) |
| Chân 23 | PTC4 — Port C bit 4 (general I/O / timer channel) |
| Chân 24 | PTC5 — Port C bit 5 (general I/O / timer channel) |
| Chân 25 | PTC6 — Port C bit 6 (general I/O / timer channel) |
| Chân 26 | PTC7 — Port C bit 7 (general I/O / timer channel) |
| Chân 27 | VDD — Positive supply (3.3 V or 5 V) |
| Chân 28 | VSS — Ground |
| Chân 29 | PTD0 — Port D bit 0 (general I/O / SCI TX) |
| Chân 30 | PTD1 — Port D bit 1 (general I/O / SCI RX) |
| Chân 31 | PTD2 — Port D bit 2 (general I/O) |
| Chân 32 | PTD3 — Port D bit 3 (general I/O) |
| Chân 33 | PTD4 — Port D bit 4 (general I/O) |
| Chân 34 | PTD5 — Port D bit 5 (general I/O) |
| Chân 35 | PTD6 — Port D bit 6 (general I/O) |
| Chân 36 | PTD7 — Port D bit 7 (general I/O) |
| Chân 37 | RST — Reset input (active low) |
| Chân 38 | OSC1 — Crystal / external clock input (optional with internal osc) |
| Chân 39 | OSC2 — Crystal output (optional) |
| Chân 40 | BKGD — Background Debug Mode (BDM) pin |
| Chân 41 | VDD — Positive supply (3.3 V or 5 V) |
| Chân 42 | VSS — Ground |
Ứng dụng tiêu biểu
MC908AP8CBE phù hợp cho 6 Áp dụngs: Automotive Body Control Modules, Appliance Control Boards (White Goods), HVAC Fan and Damper Drivers, Industrial Sensor Conditioning, Educational / Developer Boards, Legacy Embedded System Field Replacement.
Automotive Body Control Modules
The MC908AP8CBE's 8-bit HC08 core, 30 I/O pins and internal oscillator suit it for body electronics such as door modules, mirror controllers, lighting drivers, and seat switches. The 10-bit ADC handles analog sensors (rheostats, temperature), the SCI supports LIN-style communication, and the 8 MHz bus keeps switch debouncing and PWM control deterministic. The 42-pin SPDIP package is also field-service friendly for legacy automotive platforms with long production tails.
Được đề xuất
Appliance Control Boards (White Goods)
Washing machines, dishwashers, and ovens use HC08-class MCUs for motor sequencing, user-interface scanning, and safety timers. The MC908AP8CBE's 8 KB FLASH holds the main state-machine plus look-up tables, while 1 KB RAM handles run-time variables and the 10-bit ADC reads NTC temperature sensors. The 3.3 V / 5 V supply range accepts either modern or legacy appliance rails without level shifting.
Được đề xuất
HVAC Fan and Damper Drivers
HVAC indoor units rely on 8-bit MCUs to drive triac-controlled fans and stepper/motor-driven dampers. The MC908AP8CBE's 30 I/O pins drive multiple zero-cross detectors and triac gates, while timers generate PWM for damper servos. The internal oscillator removes crystal cost, and the 42-pin SPDIP allows easy replacement during field service calls - critical for installed-base HVAC equipment.
Được đề xuất
Industrial Sensor Conditioning
Low-cost industrial sensors (pressure, level, proximity) often use 8-bit MCUs to linearize, filter, and serialize transducer readings. The MC908AP8CBE's 10-bit ADC samples analog sensor outputs at adequate resolution for 1% accuracy end-products, while the SCI provides a UART link to a host PLC or display. The wide 3.3 V / 5 V supply range accepts common industrial 24 V-derived rails with simple LDO regulation.
Được đề xuất
Educational / Developer Boards
The 42-pin SPDIP package is breadboard-friendly, making the MC908AP8CBE a frequent choice in university embedded-systems courses and HC08 training kits. The on-chip BDM (background debug module) supports single-wire in-circuit debugging and FLASH programming through a low-cost external BDM pod. 8 KB FLASH is enough for labs covering timers, ADC, and SCI exercises without tooling changes.
Được đề xuất
Legacy Embedded System Field Replacement
Many installed systems in industrial automation and point-of-sale equipment shipped with HC908AP8 MCUs in the early 2000s and still require service parts decades later. The MC908AP8CBE in 42-pin SPDIP remains a direct field replacement for those boards without PCB rework. Authorized long-lifecycle distributors (Rochester Electronics, LCSC) carry stock for repair and refurbishment channels as of 2026-10-17.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MC908AP8CBE — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | MC908AP8ACBE | MC908AP16ACBE | MC908AP16CBE | MC68HC908JL8CSPE | MC9S08AW50CFUE |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors (Freescale) |
| Package | 42-SPDIP | 42-SPDIP - same | 42-SPDIP - same | 42-SPDIP - same | 42-SDIP - same | 64-QFP - different (cross_package) |
| Program Memory (FLASH) | 8 KB | 8 KB | 16 KB | 16 KB | 8 KB | 50 KB |
| RAM Size | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB | 2 KB |
| CPU Frequency | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 40 MHz |
| Core | HC08 (8-bit CISC) | HC08 (8-bit CISC) | HC08 (8-bit CISC) | HC08 (8-bit CISC) | HC08 (8-bit CISC) | HCS08 (8-bit, enhanced) |
| Number of I/O | 30 | 30 | 30 | 30 | 23 | 54 |
| ADC | 10-bit | 10-bit | 10-bit | 10-bit | 8-bit | 12-bit |
| Lifecycle Status | NRND | NRND | NRND | NRND | Active (per distributor) | Active |
Bảo phân biệt quan trọng
- Field-service-friendly 42-SPDIP through-hole package (vsMC9S08AW50CFUE (64-QFP))
- Balanced 8 KB FLASH / 1 KB RAM for compact control firmware (vsMC908AP16ACBE (16 KB FLASH))
- 10-bit ADC adequate for most sensor conditioning (vsMC68HC908JL8CSPE (8-bit ADC))
Ghi chú thiết kế
The MC908AP8CBE accepts a single 3.3 V or 5 V rail and exposes VDD/VSS on multiple pins distributed around the 42-SPDIP package. Decouple each VDD pin with a 0.1 uF ceramic capacitor placed within 5 mm of the pin, and add a single 10 uF bulk capacitor on the rail. This star-grounding approach prevents digital switching noise from coupling into the analog ADC inputs on shared port pins.
Do not assume all HC908AP8 family variants share the same FLASH size - the MC908AP8CBE has 8 KB while the MC908AP16ACBE has 16 KB, even though both share the same 42-SPDIP pinout. Verify the specific mask/revision on the device top marking before programming. Also, FLASH programming voltage is generated internally; no external programming supply is required, but the BDM pod must follow NXP's HC08 BDM protocol sequence.
Reserve the BKGD (BDM), RST, OSC1, and OSC2 pins on the PCB even if unused in production - the BKGD pin enables field firmware updates and in-circuit debugging throughout the product lifecycle. Place the optional external crystal near OSC1/OSC2 with short traces and a guard ground to keep EMI low if the design later migrates from internal to external oscillator operation.
Thông tin tuân thủ
RoHS/lead-free status not explicitly stated in the verified web data; this part is from the legacy HC908 family that predates many modern compliance disclosures. Contact NXP or authorized distributors for the latest compliance documentation.
