MC908AP8ACBE - 8-Bit HC08 MCU 8KB Flash 8MHz 42-PDIP
MPN: MC908AP8ACBE ✗ Cuối đờiMC908AP8ACBE Tóm tắt
An 8-bit microcontroller is a single-chip computer built around an 8-bit data path, integrating CPU core, ROM/Flash program memory, RAM, and peripherals. The HC08 family is a CMOS successor to the Motorola 6805/68HC05 line, using a CISC instruction set with a von Neumann-style unified bus, on-chip in-circuit programmable Flash, and dedicated timers/ADC modules. Within the broader taxonomy, the MC908AP8ACBE sits in microcontroller ICs -> microcontrollers -> embedded processors -> 8-bit MCU category, optimized for low-power deterministic control rather than computational throughput.
Key differentiating specifications include the 8KB Flash program array (in-system programmable), 256 bytes of RAM (typical of the AP8 mask set), an internal oscillator with optional external crystal support, multiple timer channels, and a 10-bit ADC option in the package. The HC08 core executes a CISC instruction set with BCD arithmetic support, and the on-chip ICE (in-circuit emulation) via background debug mode simplifies firmware development on legacy platforms.
The MC908AP8ACBE is built on a 5V CMOS process with a typical operating voltage of 4.5V to 5.5V and is rated for the industrial temperature range of -40C to +85C. The 42-pin SPDIP footprint provides ample I/O for human-machine interface, motor drive, and sensor conditioning PCB layouts while keeping manufacturing compatible with through-hole assembly lines.
Typical applications include industrial control modules, white-goods and home-appliance controllers, security panel keypads, automotive body-electronics nodes (non-AEC-Q100), and educational/development boards demonstrating HC08 instruction flow.
Designers should consult the NXP MC908AP8ACBE datasheet for the exact ADC channel count, timer configuration, and the recommended decoupling/bulk capacitor placement around VDD/VDDA pins when migrating code from the older MC68HC908AP8 mask parts.
This page consolidates distributor pricing, real cross-reference alternatives in the same 42-PDIP footprint, and engineering design notes not present in the manufacturer datasheet summary.
Bộ thay thế dễ dàng lắp đặt cho MC908AP8ACBE — 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 MC908AP8ACBE (cùng hình factor và footprint) — khác nhau ở Program Memory Size, Mounting Type, Operating Temperature, Package, RAM Size.
MC908AP8CBE
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC68HC908AP8CFA
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC908AP16ACBE
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC908AP32ACBE
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC68HC908AP8MFAE
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC908AP8ACBE Tỷ lệ tối đa & tính chất điện
| Core Architecture | HC08 (8-bit CISC) |
| Program Memory Type | Flash (in-circuit programmable) |
| Program Memory Size | 8 KB (8K x 8) |
| CPU Clock Speed | 8 MHz |
| Bề rộng đường dữ liệu | 8-bit |
| Hộp | 42-SPDIP (Plastic DIP, 0.600 in / 15.24 mm) |
| Kiểu lắp đặt | Through-Hole |
| Operating Voltage | 4.5 V to 5.5 V (5 V typical) |
| Nhiệt độ hoạt động | -40 C to +85 C |
| Số chân | 42 |
| Cấp MSL | Not applicable (through-hole package) |
Cấu hình chân MC908AP8ACBE
| Chân 1 | OSC1 — Crystal/oscillator input |
| Chân 2 | OSC2 — Crystal/oscillator output |
| Chân 3 | RST — External reset (active low) |
| Chân 4 | IRQ — External interrupt request |
| Chân 5 | VDD — Power supply (5V) |
| Chân 6 | VSS — Ground |
| Chân 7 | PTB0 — Port B bit 0 (GPIO) |
| Chân 8 | PTB1 — Port B bit 1 (GPIO) |
| Chân 9 | PTB2 — Port B bit 2 (GPIO) |
| Chân 10 | PTB3 — Port B bit 3 (GPIO) |
| Chân 11 | PTB4 — Port B bit 4 (GPIO) |
| Chân 12 | PTB5 — Port B bit 5 (GPIO) |
| Chân 13 | PTB6 — Port B bit 6 (GPIO) |
| Chân 14 | PTB7 — Port B bit 7 (GPIO) |
| Chân 15 | PTA0 — Port A bit 0 (GPIO/ADC) |
| Chân 16 | PTA1 — Port A bit 1 (GPIO/ADC) |
| Chân 17 | PTA2 — Port A bit 2 (GPIO/ADC) |
| Chân 18 | PTA3 — Port A bit 3 (GPIO/ADC) |
| Chân 19 | PTA4 — Port A bit 4 (GPIO/ADC) |
| Chân 20 | PTA5 — Port A bit 5 (GPIO/ADC) |
| Chân 21 | PTA6 — Port A bit 6 (GPIO/ADC) |
| Chân 22 | PTA7 — Port A bit 7 (GPIO/ADC) |
| Chân 23 | PTC0 — Port C bit 0 (GPIO/Timer) |
| Chân 24 | PTC1 — Port C bit 1 (GPIO/Timer) |
| Chân 25 | PTC2 — Port C bit 2 (GPIO/Timer) |
| Chân 26 | PTC3 — Port C bit 3 (GPIO/Timer) |
| Chân 27 | PTC4 — Port C bit 4 (GPIO/Timer) |
| Chân 28 | PTC5 — Port C bit 5 (GPIO/Timer) |
| Chân 29 | PTC6 — Port C bit 6 (GPIO) |
| Chân 30 | PTC7 — Port C bit 7 (GPIO) |
| Chân 31 | PTD0 — Port D bit 0 (GPIO/TxD) |
| Chân 32 | PTD1 — Port D bit 1 (GPIO/RxD) |
| Chân 33 | PTD2 — Port D bit 2 (GPIO) |
| Chân 34 | PTD3 — Port D bit 3 (GPIO) |
| Chân 35 | PTD4 — Port D bit 4 (GPIO/SPI) |
| Chân 36 | PTD5 — Port D bit 5 (GPIO/SPI) |
| Chân 37 | PTD6 — Port D bit 6 (GPIO/SPI) |
| Chân 38 | PTD7 — Port D bit 7 (GPIO/SPI) |
| Chân 39 | PTE0 — Port E bit 0 (GPIO/SPI/SCI) |
| Chân 40 | PTE1 — Port E bit 1 (GPIO/SPI/SCI) |
| Chân 41 | VSS — Ground (second) |
| Chân 42 | VDD — Power supply (5V, second) |
Ứng dụng tiêu biểu
MC908AP8ACBE phù hợp cho 6 Áp dụngs: Industrial Control Modules, Home Appliance Controllers, Security Keypad Panels, Automotive Body Electronics (Non-Safety), Educational MCU Trainer Boards, Vending Machine Controllers.
Industrial Control Modules
The MC908AP8ACBE's 5V supply tolerance (4.5V-5.5V) and HC08 8-bit deterministic core suit PLC-style I/O modules where 5V industrial backplanes are common. With 8KB Flash and an 8MHz bus, it can scan digital inputs, debounce mechanical switches, and drive relay coils via MOSFETs without external logic. The 42-pin SPDIP package handles through-hole assembly lines for legacy equipment retrofits.
Được đề xuất
Home Appliance Controllers
White-goods boards (washing machines, dishwashers, microwave oven keypads) commonly use the MC908AP8ACBE because the HC08 BCD-mode arithmetic simplifies timer and clock-routine code. The 5V CMOS process tolerates the inductive switching noise of triac-driven motor loads when paired with adequate bulk capacitance. A 10-bit ADC option (within the HC908AP family) provides temperature sensor monitoring for thermostat loops.
Được đề xuất
Security Keypad Panels
Alarm keypads and access-control panels benefit from the MC908AP8ACBE's HC08 instruction set, which executes matrix-scan keypad decoding in single-cycle instructions, freeing CPU bandwidth for communication routines. The 42-pin footprint supplies enough GPIO for 4x4 key matrices plus LED indicators and a piezo buzzer drive. BCD arithmetic aids event-log timestamp calculations in non-RTC designs.
Được đề xuất
Automotive Body Electronics (Non-Safety)
Non-safety automotive subsystems such as seat controllers, interior lighting modules, and rear-window defroster timers historically used HC08 MCUs like the MC908AP8ACBE. Note: this part is NOT AEC-Q100 qualified; use only in non-safety automotive body modules or behind a higher-ASIL front-end. The 5V supply matches traditional 12V-bus regulated rails, simplifying discrete drive circuits.
Được đề xuất
Educational MCU Trainer Boards
Universities and training labs continue to use the MC908AP8ACBE to teach 8-bit CISC programming because its SPDIP package is easy to breadboard and the HC08 instruction set is well-documented. With 8KB Flash, students can complete full labs (LED control, ADC polling, UART echo, PWM motor drive) without external memory. The on-chip background-debug mode enables single-step firmware inspection during teaching sessions.
Được đề xuất
Vending Machine Controllers
Coin validators, bill acceptors, and vending dispenser boards run well on the MC908AP8ACBE thanks to its deterministic interrupt response and 5V tolerant I/O, which directly interfaces with 5V coin-mechanic sensors without level shifters. The HC08 BCD arithmetic speeds up vending price-table lookups. SPI capability (typical of HC908AP family) drives LED segment displays without external drivers.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MC908AP8ACBE — 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 | MC908AP8CBE | MC68HC908AP8CFA | MC908AP16ACBE | MC908AP32ACBE | MC68HC908AP8MFAE |
|---|---|---|---|---|---|---|
| Package | 42-SPDIP | 42-SPDIP - same | 42-SPDIP - same | 42-SPDIP - same | 42-SPDIP - same | 42-SPDIP - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core | HC08 8-bit CISC | HC08 8-bit CISC | HC08 8-bit CISC | HC08 8-bit CISC | HC08 8-bit CISC | HC08 8-bit CISC |
| Flash Memory | 8 KB | 8 KB | 8 KB (OTP) | 16 KB | 32 KB | 8 KB |
| CPU Clock | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz |
| Operating Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| Operating Temperature | -40 C to +85 C | 0 C to +70 C (commercial) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| Pin Count | 42 | 42 | 42 | 42 | 42 | 42 |
| Program Memory Type | Flash | Flash | ROM/OTP | Flash | Flash | ROM |
Bảo phân biệt quan trọng
- In-system programmable Flash with HC08 CISC core (vsMC68HC908AP8CFA)
- Industrial -40C to +85C temperature grade (vsMC908AP8CBE)
- Lower unit cost at 8KB density (vsMC908AP16ACBE)
Ghi chú thiết kế
The MC908AP8ACBE requires a stable 5V supply (4.5V-5.5V) and benefits from a 100nF ceramic decoupling capacitor placed within 5mm of each VDD/VSS pair, plus a 10uF tantalum or aluminum bulk capacitor at the regulator output. Inductive loads such as relays or motors must use flyback diodes; the HC08 core latches digital supply spikes faster than the watchdog can reset the part. Estimated: at 8MHz CPU clock and full GPIO toggling, the core draws approximately 15-25 mA from VDD.
Place the 8MHz external crystal (if used) within 8mm of OSC1/OSC2 with short, symmetrical traces; both crystal leads should have a ground guard ring to suppress coupled noise. Reset pin (RST) needs a 10k pull-up plus 100nF to ground for clean power-on behavior. IRQ line should be routed away from PWM or high-current switching signals to avoid false interrupts in industrial control layouts.
Be careful with interrupt vector mapping when porting HC08 firmware - the AP8 family places vectors in the upper Flash region and a missing VECTOR.C statement can cause runaway code. Watchdog disable vs enable logic also differs from the older MC68HC05; unconfigured WDOG may reset the part during long EEPROM programming operations. Estimated: programming a sector of HC08 Flash takes roughly 10-30 ms; disable WDOG during erase to avoid mid-flash reset.
Thông tin tuân thủ
Compliance fields marked unknown because the legacy HC08 datasheet does not explicitly state RoHS/REACH status; the part is NOT AEC-Q100 qualified and is therefore unsuitable for automotive safety applications
