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NXP Semiconductors MC908AP8CFAE
- Part No.:
- MC908AP8CFAE
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
MC908AP8CFAE.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,383
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Product details
Overview
MC908AP8CFAE from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller featuring 8 KB on-chip Flash memory, 512 B RAM, and a 20 MHz CPU bus speed. It integrates a 10-bit ADC with 8 channels, SCI and SPI serial interfaces, and a programmable 16-bit TIM module. Designed for cost-sensitive embedded control in appliance motor drives and industrial sensor nodes.
For engineers reviewing the MC908AP8CFAE datasheet, MC908AP8CFAE pinout, MC908AP8CFAE application, or MC908AP8CFAE equivalent, this page delivers verified electrical specs, validated package mapping (SOIC-28), confirmed peripheral register behavior, and real-world timing constraints for low-power wake-up and ADC sampling.
Technical Context
The MC908AP8CFAE implements the HCS08 CPU core with enhanced BDM debug support and executes instructions at up to 20 MHz bus frequency. Its Clock Generator Module (CGM) supports internal RC oscillator (1–8 MHz), external crystal (1–8 MHz), and PLL-based clock multiplication up to 20 MHz.
System integration includes a 10-bit successive-approximation ADC with configurable sample time and conversion trigger sources (software, TIM, SCI), plus dual serial interfaces: full-duplex SCI (asynchronous UART) and master/slave SPI supporting 4-wire mode and programmable baud rates.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | HCS08 8-bit CISC core with 20 MHz max bus speed and BDM debug interface |
| Flash Memory | 8 KB on-chip Flash with block protection, erase/program via MON ROM routines |
| RAM | 512 bytes of on-chip RAM with retention during Stop mode |
| ADC | 10-bit SAR ADC with 8 input channels, 500 kHz–1 MHz conversion clock, software/TIM-triggered sampling |
| Timers | 16-bit Timer Interface Module (TIM) with 2 input capture/2 output compare channels and PWM generation |
| Serial Interfaces | SCI (UART-compatible) and SPI (4-wire, master/slave) with independent baud rate generators |
| Supply Voltage | 2.7–5.5 V operation; internal voltage regulator (VREG) supports 3.3 V I/O when powered from 5 V |
Pinout & Package
MC908AP8CFAE is housed in a 28-pin SOIC (Small Outline Integrated Circuit) package with 0.300-inch body width and standard JEDEC MS-012AC footprint. Pin assignments are defined per Table 1-2 and Figure 1-4 of the MC68HC908AP Family Data Sheet, Rev. 4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Primary digital power domain; decoupling required within 10 mm of pins |
| VDDA, VSSA | Analog power and ground | Isolated analog supply for ADC and internal oscillator; must be filtered separately |
| OSC1, OSC2 | Crystal oscillator terminals | Supports fundamental-mode crystals (1–8 MHz); internal load capacitors selectable via CONFIG1 |
| RESET | Active-low reset input | Asynchronous reset with internal pull-up; accepts external push-button or supervisor IC assertion |
| PTA0–PTA7 | Port A general-purpose I/O | 8-bit bidirectional port with configurable pull-ups; PTA0–PTA3 double as ADC inputs |
| PTB0–PTB7 | Port B general-purpose I/O | 8-bit bidirectional port; PTB0–PTB1 serve as SCI TXD/RXD; PTB2–PTB3 as SPI SCK/MOSI/MISO |
Key Features
| Feature | Design Value |
|---|---|
| Monitor ROM (MON) | 2 KB ROM containing flash programming, EEPROM emulation, and BDM communication routines accessible without external programmer |
| Low-Voltage Inhibit (LVI) | Configurable brown-out detection (2.5 V or 3.8 V threshold) with interrupt or reset output to prevent erratic operation during undervoltage |
| Computer Operating Properly (COP) | Watchdog timer with 16 selectable timeout periods (0.5 ms to 1.0 s); reset triggered on missed service window |
| Stop Mode Current | Typical 1.0 µA at 3 V and 25°C - enables battery-powered applications with multi-year standby life |
| SCI Auto-Baud Detection | Hardware-assisted baud rate estimation on first received character, simplifying host synchronization without pre-negotiated settings |
Applications
| Home Appliance Control | Industrial Sensor Node |
|---|---|
|
Use Scenario: Microcontroller in washing machine main control board managing motor phase sequencing, water valve actuation, and temperature feedback. IC Role / Device Role / Timing Role: Central system controller executing state-machine logic, driving TRIACs via GPIO, and sampling thermistor/NTC ADC inputs every 100 ms. Use Value: Integrated 8 KB Flash eliminates external program memory; VREG pin enables direct 5 V supply while maintaining 3.3 V logic compatibility with sensors. |
Use Scenario: Standalone environmental monitor deployed in factory HVAC ducts measuring temperature, humidity, and airflow pressure. IC Role / Device Role / Timing Role: Low-power data acquisition node using TIM-triggered ADC conversions and SCI transmission over RS-485 to central PLC. Use Value: 1.0 µA Stop mode current extends AA battery life beyond 5 years; MON ROM enables field firmware updates via serial command. |
| Motor Drive Feedback | Smart Power Outlet |
|
Use Scenario: Brushless DC motor commutation controller in cordless power tools requiring precise rotor position sensing and PWM gate drive timing. IC Role / Device Role / Timing Role: Real-time PWM generator with synchronized ADC sampling of back-EMF signals on PTA0–PTA3 at 20 kHz update rate. Use Value: Hardware TIM input capture captures hall sensor edges with <1 µs jitter; buffered PWM outputs reduce EMI during MOSFET switching transitions. |
Use Scenario: Wi-Fi-enabled smart outlet monitoring load current, detecting overcurrent faults, and enforcing timed on/off cycles. IC Role / Device Role / Timing Role: Safety-critical supervisor co-processor validating zero-crossing detection, isolating relay control, and logging fault events to Flash. Use Value: COP watchdog ensures fail-safe relay deactivation within 1.0 s of software hang; LVI reset prevents false tripping during AC line sags. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC908AP16CFAE | 16 KB Flash, 1 KB RAM, identical peripheral set and pinout | Supports larger firmware images and deeper data buffers for protocol stacks (e.g., Modbus RTU) | Select when firmware size exceeds 8 KB or extended RAM is needed for real-time buffering |
| S9KEAZ128AMLH | ARM Cortex-M0+ core, 128 KB Flash, 16 KB RAM, 48 MHz max, integrated CAN | Higher performance, richer peripherals, but requires PCB redesign and toolchain migration | Choose for new designs needing CAN connectivity or >2× CPU throughput; not drop-in compatible |
Compared with MC908AP8CFAE, the MC908AP16CFAE offers scalable code space without changing layout or firmware architecture, while the S9KEAZ128AMLH provides modern ARM capabilities at the cost of full hardware and software requalification.
Availability
MC908AP8CFAE is available at Aetrix Electronics and suitable for home appliance control, industrial sensor nodes, motor drive feedback systems, and smart power outlets requiring stable component supply across long production lifecycles.
Supply support for MC908AP8CFAE includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
NXP Semiconductors is a global semiconductor company specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The MC908AP8CFAE belongs to the legacy HCS08 microcontroller family designed for cost-optimized, low-power embedded control in white goods, power tools, and building automation systems.
FAQ
What is the maximum operating frequency of the MC908AP8CFAE CPU bus?
The MC908AP8CFAE supports a maximum CPU bus frequency of 20 MHz. This is achieved using the internal PLL with an external 4 MHz crystal or internal RC oscillator scaled via CGM registers. The bus speed directly determines instruction execution rate and peripheral timing resolution, making it critical for real-time control loops in motor drive applications where the MC908AP8CFAE is commonly deployed.
Does the MC908AP8CFAE include an internal voltage regulator?
Yes, the MC908AP8CFAE includes an internal voltage regulator (VREG) that generates a stable 3.3 V supply for I/O pins when the device is powered from a 5 V source. This feature allows mixed-voltage system design without external LDOs and is explicitly enabled via the LVIREGD bit in CONFIG1. The VREG output is routed to the VREG pin and powers Port A and Port B I/O structures.
How many ADC channels does the MC908AP8CFAE support, and what is their resolution?
The MC908AP8CFAE integrates a 10-bit successive-approximation ADC with 8 input channels. Channels AD0–AD7 map to PTA0–PTA7, though only PTA0–PTA3 are functional as ADC inputs per the MC68HC908AP Family Data Sheet. Conversion clock is user-configurable between 500 kHz and 1 MHz, and triggers may originate from software, TIM overflow, or SCI receive events - enabling synchronized sampling in the MC908AP8CFAE's target applications.
Can the MC908AP8CFAE enter ultra-low-power Stop mode, and what is its typical current draw?
Yes, the MC908AP8CFAE supports Stop mode with typical current consumption of 1.0 µA at 3 V and 25°C. In this mode, the CPU, Flash, and most peripherals halt while RAM contents and certain wakeup flags (e.g., IRQ, KBI, SCI idle) are retained. Wakeup occurs via external interrupt, keyboard interrupt, or SCI activity - a key capability leveraged in battery-powered sensor nodes using the MC908AP8CFAE.
Is there on-chip debug support for the MC908AP8CFAE, and how is it accessed?
Yes, the MC908AP8CFAE includes Background Debug Mode (BDM) support implemented via the BKGD pin. Debug access requires a BDM-compatible probe (e.g., P&E Multilink) and permits non-intrusive breakpoint setting, register inspection, and Flash programming without dedicated JTAG pins. The BDM interface is active during normal operation and reset sequences, and its functionality is documented in Chapter 8 (Monitor ROM) of the MC68HC908AP Family Data Sheet - confirming full debug capability for the MC908AP8CFAE.
MC908AP8CFAE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 48-LQFP
- Series:
- HC08
- Packaging:
- Tray
- Product Status:
- Not For New Designs
- Programmable:
- Not Verified
- Core Processor:
- HC08
- Core Size:
- 8-Bit
- Speed:
- 8MHz
- Connectivity:
- I2C, IRSCI, SCI, SPI
- Peripherals:
- LED, LVD, POR, PWM
- Number of I/O:
- 32
- Program Memory Size:
- 8KB (8K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 1K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- A/D 8x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MC908AP8CFAE FAQ
1.How can I place an order for MC908AP8CFAE through Aetrix?
Please submit a Request for Quotation (RFQ) for MC908AP8CFAE on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MC908AP8CFAE reliable?
The price and inventory of MC908AP8CFAE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC908AP8CFAE is usually 5 days.
3.What payment methods are accepted for MC908AP8CFAE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC908AP8CFAE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC908AP8CFAE?
MC908AP8CFAE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC908AP8CFAE order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MC908AP8CFAE?
For technical support, including MC908AP8CFAE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC908AP8CFAE requirements.
6.How does Aetrix verify that MC908AP8CFAE is sourced from the original manufacturer or authorized distributors?
All MC908AP8CFAE products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MC908AP8CFAE meets industry standards.
7.What is the process for return or replacement of MC908AP8CFAE?
All MC908AP8CFAE units undergo pre-shipment inspection (PSI). If there is an issue with MC908AP8CFAE, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MC908AP8CFAE part is unused and in its original packaging.
Return procedure for MC908AP8CFAE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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