MC908AP8ACBE - 8-Bit HC08 MCU 8KB Flash 8MHz 42-PDIP
N.º de pieza: MC908AP8ACBE ✗ Fin de vida| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $12.85 | $12,85 |
| 10 | $11.2 | $112,00 |
| 100 | $9.75 | $975,00 |
| 500 | $8.4 | $4.200,00 |
| 1.000 | $7.15 | $7.150,00 |
MC908AP8ACBE Descripción general
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.
Alternativas directas para MC908AP8ACBE — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con MC908AP8ACBE (mismo factor de forma y huella) — difiere en Program Memory Size, Mounting Type, Operating Temperature, Package, RAM Size.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
MC908AP8CBE
✅ Sustitución directa✓ En stock
$2.95 / unidad
Ver hoja de datos →MC68HC908AP8CFA
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MC908AP16ACBE
✅ Sustitución directa✓ En stock
$5.4 / unidad
Ver hoja de datos →MC908AP32ACBE
✅ Sustitución directa✓ En stock
Consulte el precio
Ver hoja de datos →MC68HC908AP8MFAE
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MC908AP8ACBE Valores máximos y características eléctricas
| 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 |
| Ancho del bus de datos | 8-bit |
| Encapsulado | 42-SPDIP (Plastic DIP, 0.600 in / 15.24 mm) |
| Tipo de montaje | Through-Hole |
| Operating Voltage | 4.5 V to 5.5 V (5 V typical) |
| Temperatura de funcionamiento | -40 C to +85 C |
| Recuento de pines | 42 |
| Nivel MSL | Not applicable (through-hole package) |
Configuración de pines de MC908AP8ACBE
| Pin 1 | OSC1 — Crystal/oscillator input |
| Pin 2 | OSC2 — Crystal/oscillator output |
| Pin 3 | RST — External reset (active low) |
| Pin 4 | IRQ — External interrupt request |
| Pin 5 | VDD — Power supply (5V) |
| Pin 6 | VSS — Ground |
| Pin 7 | PTB0 — Port B bit 0 (GPIO) |
| Pin 8 | PTB1 — Port B bit 1 (GPIO) |
| Pin 9 | PTB2 — Port B bit 2 (GPIO) |
| Pin 10 | PTB3 — Port B bit 3 (GPIO) |
| Pin 11 | PTB4 — Port B bit 4 (GPIO) |
| Pin 12 | PTB5 — Port B bit 5 (GPIO) |
| Pin 13 | PTB6 — Port B bit 6 (GPIO) |
| Pin 14 | PTB7 — Port B bit 7 (GPIO) |
| Pin 15 | PTA0 — Port A bit 0 (GPIO/ADC) |
| Pin 16 | PTA1 — Port A bit 1 (GPIO/ADC) |
| Pin 17 | PTA2 — Port A bit 2 (GPIO/ADC) |
| Pin 18 | PTA3 — Port A bit 3 (GPIO/ADC) |
| Pin 19 | PTA4 — Port A bit 4 (GPIO/ADC) |
| Pin 20 | PTA5 — Port A bit 5 (GPIO/ADC) |
| Pin 21 | PTA6 — Port A bit 6 (GPIO/ADC) |
| Pin 22 | PTA7 — Port A bit 7 (GPIO/ADC) |
| Pin 23 | PTC0 — Port C bit 0 (GPIO/Timer) |
| Pin 24 | PTC1 — Port C bit 1 (GPIO/Timer) |
| Pin 25 | PTC2 — Port C bit 2 (GPIO/Timer) |
| Pin 26 | PTC3 — Port C bit 3 (GPIO/Timer) |
| Pin 27 | PTC4 — Port C bit 4 (GPIO/Timer) |
| Pin 28 | PTC5 — Port C bit 5 (GPIO/Timer) |
| Pin 29 | PTC6 — Port C bit 6 (GPIO) |
| Pin 30 | PTC7 — Port C bit 7 (GPIO) |
| Pin 31 | PTD0 — Port D bit 0 (GPIO/TxD) |
| Pin 32 | PTD1 — Port D bit 1 (GPIO/RxD) |
| Pin 33 | PTD2 — Port D bit 2 (GPIO) |
| Pin 34 | PTD3 — Port D bit 3 (GPIO) |
| Pin 35 | PTD4 — Port D bit 4 (GPIO/SPI) |
| Pin 36 | PTD5 — Port D bit 5 (GPIO/SPI) |
| Pin 37 | PTD6 — Port D bit 6 (GPIO/SPI) |
| Pin 38 | PTD7 — Port D bit 7 (GPIO/SPI) |
| Pin 39 | PTE0 — Port E bit 0 (GPIO/SPI/SCI) |
| Pin 40 | PTE1 — Port E bit 1 (GPIO/SPI/SCI) |
| Pin 41 | VSS — Ground (second) |
| Pin 42 | VDD — Power supply (5V, second) |
Aplicaciones típicas
MC908AP8ACBE es adecuado para 6 aplicacións: 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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MC908AP8ACBE — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | 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 |
Diferenciadores clave
- In-system programmable Flash with HC08 CISC core (frente a MC68HC908AP8CFA)
- Industrial -40C to +85C temperature grade (frente a MC908AP8CBE)
- Lower unit cost at 8KB density (frente a MC908AP16ACBE)
Notas de diseño
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.
Información de cumplimiento
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
