MC908QY4ACPE - HC08 8-Bit MCU 4KB Flash 8MHz | NXP | DIP-16
Référence : MC908QY4ACPE ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $1.67 | $1,67 |
| 10 | $1.5 | $15,00 |
| 100 | $1.35 | $135,00 |
| 500 | $1.2 | $600,00 |
| 1 000 | $1.05 | $1 050,00 |
MC908QY4ACPE Présentation
An 8-bit microcontroller is a single-chip computer that integrates a CPU, program memory (Flash/ROM), data memory (RAM), and peripheral I/O on one die. The M68HC08 family is a Complex Instruction Set Computer (CISC) architecture with a Von Neumann (shared instruction/data bus) topology, and the CPU08 central processor used in this part is an enhanced successor to the original HC05/HC11 cores, adding stack-based instructions, a Y index register, and a background debug mode (BDM). The MC908QY4ACPE sits in the HC908Q sub-family, which is the smallest pin-count member of HC08, optimized for low-cost appliance, sensor, and control applications where a few bytes of analog and digital I/O suffice.
Key features include 4KB (4K x 8) of on-chip Flash, 128 bytes of RAM, 14 general-purpose I/O pins, an internal 8 MHz bus clock derived from an on-chip oscillator, multiple timer channels, and a 5-channel 8-bit ADC. The device operates from 4.5V to 5.5V, draws low quiescent current in wait and stop modes, and includes a built-in M68HC08 instruction-compatible BDM interface for in-circuit debug and Flash programming. Compared to legacy HC05 parts, the HC08Q family adds USB-friendly Flash, more accurate timers, and a smaller footprint option.
Typical applications include low-cost appliance control, sensor signal conditioning, white-goods user interfaces, smart battery chargers, simple motor-control loops (BLDC/PMSM auxiliary), IR remote receiver ICs, and general-purpose 8-bit control replacement boards. The 14-pin I/O budget is sufficient for keypad-scanning, LED-driving, and PWM actuator outputs in space-constrained designs.
When using this part, observe the 4.5V-5.5V supply window and design decoupling around the internal bus clock to avoid spurious resets. The BDM (background debug mode) interface enables Flash programming and debug without an in-circuit emulator, significantly reducing NRE and tool costs for low-volume production.
Alternatives de remplacement direct pour MC908QY4ACPE — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec MC908QY4ACPE (même facteur de forme et même empreinte) — différant par Core Architecture, Mounting Type, Program Memory Size, ADC, I/O Pins.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
MC68HC908QY4CPE
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MC908QY2ACPE
✅ Remplacement direct✓ En stock
$5.1 / unité
Voir la fiche technique →MC908QB4CPE
✅ Remplacement direct✓ En stock
$4.1 / unité
Voir la fiche technique →MC908QY4ACPE
✅ Remplacement direct✓ En stock
$1.05 / unité
Voir la fiche technique →MC908QY2VDW
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MC908QY4ACPE Valeurs maximales et caractéristiques électriques
| Core Architecture | M68HC08 (CISC, Von Neumann) |
| CPU Core | CPU08 |
| Largeur du bus de données | 8-bit |
| Program Memory | 4 KB Flash (4K x 8) |
| RAM | 128 bytes |
| Maximum Bus Clock | 8 MHz (internal) |
| Tension d'alimentation | 4.5 V to 5.5 V |
| I/O Pins | 14 |
| ADC | 8-bit, 5 channels |
| Timers | Multiple 16-bit / 8-bit channels |
| Debug Interface | Background Debug Mode (BDM) |
| Boîtier | 16-PDIP (0.300 inch, 7.62 mm pitch) |
| Type de montage | Through-Hole (THT) |
Configuration des broches de MC908QY4ACPE
| Broche 1 | IRQ — External interrupt request input |
| Broche 2 | PTA0/TCH — GPIO A0 / Timer channel |
| Broche 3 | PTA1/TCH — GPIO A1 / Timer channel |
| Broche 4 | PTA2 — GPIO A2 |
| Broche 5 | PTA3 — GPIO A3 |
| Broche 6 | PTA4/RESET — GPIO A4 / Reset (bidirectional) |
| Broche 7 | VDD — Positive supply (4.5V-5.5V) |
| Broche 8 | VSS — Ground reference |
| Broche 9 | PTB0/ADC0 — GPIO B0 / ADC channel 0 |
| Broche 10 | PTB1/ADC1 — GPIO B1 / ADC channel 1 |
| Broche 11 | PTB2/ADC2 — GPIO B2 / ADC channel 2 |
| Broche 12 | PTB3/ADC3 — GPIO B3 / ADC channel 3 |
| Broche 13 | PTB4/ADC4 — GPIO B4 / ADC channel 4 |
| Broche 14 | OSC1 — Crystal/clock input or external OSC |
| Broche 15 | OSC2 — Crystal/clock output |
| Broche 16 | BKGD — Background Debug Mode (BDM) data |
Applications typiques
MC908QY4ACPE convient pour 6 applications: White Goods Appliance Control, IR Remote-Controlled Toy and Hobby Receivers, Sensor Signal Conditioning and Sensor Hubs, Smart Battery Charger Controllers, HVAC Fan and Damper Actuator Control, Educational 8-Bit MCU Teaching Platform.
White Goods Appliance Control
The MC908QY4ACPE is well-suited for cost-sensitive white-goods controllers such as washing-machine user interfaces, microwave keypads, and dishwasher cycle timers. Its 4 KB of Flash comfortably holds typical multi-cycle state machines and PWM-driven buzzer/LED routines. The 14 GPIO pins are sufficient for 4x4 keypad scanning plus seven-segment display driving via external transistors, while the 5-channel 8-bit ADC reads thermistor divider voltages for temperature regulation. The HC08's CISC code density minimizes Flash footprint, and the rugged PDIP package survives the high-humidity, high-temperature appliance environment.
Recommandé
IR Remote-Controlled Toy and Hobby Receivers
The MC908QY4ACPE serves as a low-cost IR-decoder receiver for hobby electronics, RC toys, and educational kits. Its 8-bit CPU08 easily handles 38 kHz carrier demodulation using an external IR photodiode feeding an edge-triggered timer interrupt. With 4 KB of Flash, multiple device-mode tables (TV/DVD/AUX) fit comfortably along with cycle timing and housekeeping. The 14 GPIOs drive H-bridge transistors for toy motors and servo signals; the 8-bit ADC monitors battery voltage for low-battery shutdown. This is a canonical part for HC08 educational kits and S08 succession path.
Recommandé
Sensor Signal Conditioning and Sensor Hubs
The MC908QY4ACPE's 5-channel 8-bit ADC, combined with its low-power wait and stop modes, makes it ideal for sensor hubs aggregating thermistor, photodiode, and potentiometer inputs in industrial automation. The 14 GPIOs drive external 4-20 mA current loops via analog front-ends, or interface to SPI/SCI peripherals for upstream networked controllers. The HC08 instruction set includes hardware MAC-friendly instructions for simple digital-filter taps on the incoming analog stream. The PDIP-16 package is convenient for through-hole sensor-module designs that must survive mechanical stress in field installations.
Recommandé
Smart Battery Charger Controllers
The MC908QY4ACPE forms an inexpensive charger-controller MCU in sealed-lead-acid (SLA) and NiMH battery chargers. Its 8-bit ADC monitors pack voltage and charge current via shunt resistors, while its timer modules generate PWM for buck/boost charger topologies. Flash-resident charge algorithms (CC-CV stages, temperature-qualified timers) fit comfortably in 4 KB. The 14 GPIOs drive optocouplers, relays, status LEDs, and UART for diagnostics, while the BDM interface allows field firmware updates for evolving cell chemistries. The PDIP-16 form factor simplifies retrofit and aftermarket charger designs.
Recommandé
HVAC Fan and Damper Actuator Control
The MC908QY4ACPE is a cost-efficient controller for HVAC dampers, fresh-air valves, and small fan-coil actuators. The 16-bit timer channels produce 50 Hz servo-style or 25 kHz PWM commutation; the 8-bit ADC reads thermistor temperature and pressure-sensor voltages for closed-loop modulation. The 4 KB Flash fits HVAC proportional-control state diagrams and EEPROM-emulation routines for setpoint retention across power cycles. With VDD tied to a regulated 5 V rail and the standard PDIP footprint, board layout integrates easily with existing HVAC control boards retrofitted from older HC05 designs.
Recommandé
Educational 8-Bit MCU Teaching Platform
The MC908QY4ACPE remains a popular teaching platform for colleges and embedded-systems courses because it pairs a simple CISC instruction set with the BDM debug interface familiar to students. The PDIP-16 package survives repeated breadboard prototyping, while the 14 GPIO, 5-channel ADC, and timer peripherals cover every standard lab exercise: keypad scanner, PWM buzzer, LED chaser, UART echo, ADC capture. CodeWarrior HC08 and P&E BDM toolchains are still functional in 2026 for educational purposes, though migrating assignments to the modern S08 or Kinetis E series is recommended for new courses.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MC908QY4ACPE — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MC68HC908QY4CPE | MC908QY2ACPE | MC908QB4CPE | MC908QY4ACPE | MC908QY2VDW |
|---|---|---|---|---|---|---|
| Package | 16-PDIP | 16-PDIP - same | 16-PDIP - same | 16-PDIP - same | 16-PDIP - same | 16-PDIP - same |
| Brand | NXP Semiconductors | NXP Semiconductors (Freescale legacy) | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Program Memory | 4 KB Flash | 4 KB ROM/OTP | 2 KB Flash (-50%) | 4 KB Flash | 4 KB Flash | 2 KB Flash (-50%) |
| Bus Clock Frequency | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz |
| Architecture | HC08 CISC 8-bit | HC08 CISC 8-bit | HC08 CISC 8-bit | HC08 CISC 8-bit | HC08 CISC 8-bit | HC08 CISC 8-bit |
| Supply 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 |
| GPIO / I/O Pins | 14 | 14 | 14 | 14 | 14 | 14 |
| ADC | 5-channel 8-bit | 5-channel 8-bit | 5-channel 8-bit | 5-channel 8-bit (different mux) | 5-channel 8-bit | 5-channel 8-bit |
| Lifecycle Status | NRND / No Longer Manufactured | Obsolete (NRND) | NRND | NRND | NRND | NRND |
Principaux différenciateurs
- Flash-based QY4 variant enables in-system firmware updates (vs MC68HC908QY4CPE)
- Doubled program memory budget vs QY2 family (vs MC908QY2ACPE)
- Standardized through-hole PDIP-16 footprint (vs MC908QB4CPE)
Notes de conception
Decouple VDD with a 10 uF tantalum or aluminum bulk plus a 0.1 uF ceramic capacitor placed within 5 mm of the VDD pin to suppress switching transients from the internal oscillator. The MC908QY4ACPE specified supply range is 4.5 V to 5.5 V; operation below this risks Flash read errors and brown-out resets. Avoid routing switching loads on the same 5 V rail without additional bulk capacitance, as internal ADC references share the VDD pin.
Place the BDM connector (BKGD, GND, RESET, VDD) at the board edge for easy access during development. Keep the OSC1/OSC2 crystal traces short and symmetrical, or use a ceramic resonator with internal capacitors to reduce BOM count. Route high-current and analog signals away from the oscillator to minimize jitter, and provide a ground guard ring around the analog ADC inputs to reduce digital-coupling noise.
Do not leave the RESET pin floating: configure it with a 10 kohm pull-up to VDD and a 100 nF decoupling capacitor for reset-noise immunity. The BKGD pin is shared with a configuration register; if pulled low at RESET, the device enters BDM-active mode. Ensure Flash security bytes are properly programmed to prevent unauthorized code extraction, and verify the OPT register TRIM values against the factory trim setting for oscillator accuracy.
Informations de conformité
The 'CPE' suffix indicates the legacy tin-lead (SnPb) PDIP variant per Freescale HC08 nomenclature; RoHS compliance for this suffix is not confirmed in the verified web data. AEC-Q100 qualification is not stated and should not be assumed - see automotive-grade S08 KEA parts if required. Compliance attributes should be confirmed via the official NXP material declaration or PCN before new-design adoption.
