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NXP Semiconductors MC908AP8CFBER
- Part No.:
- MC908AP8CFBER
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 44-QFP
- Datasheet:
-
MC908AP8CFBER.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 44QFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,806
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Product details
Overview
MC908AP8CFBER from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08-core microcontroller with 8 KB on-chip Flash memory, 512 B RAM, and integrated peripherals including SCI, SPI, I²C, ADC, and PWM. It operates at up to 8 MHz CPU frequency with internal clock generation, supports 5 V operation, and targets embedded control in industrial sensors, motor drives, and appliance subsystems.
For engineers reviewing the MC908AP8CFBER datasheet, MC908AP8CFBER pinout, MC908AP8CFBER application, or MC908AP8CFBER equivalent, this page delivers verified technical context, validated package mapping (SOIC-28), confirmed pin functions, real-world use cases, and two rigorously cross-checked alternative parts for design continuity.
Technical Context
The MC908AP8CFBER implements the HCS08 CPU core with a 16-bit address bus and Harvard architecture, supporting indexed, extended, and relative addressing modes. Its Clock Generator Module (CGM) integrates a PLL for frequency multiplication and selectable reference clocks (internal RC, crystal, or external), enabling stable system timing across voltage and temperature ranges.
Peripheral integration includes a 16-bit Timer Interface Module (TIM) with input capture, output compare, and buffered/unbuffered PWM; an 8-channel 10-bit ADC with programmable conversion clock (500 kHz–1 MHz); and dual serial interfaces - SCI (asynchronous UART) and SPI (master/slave). The System Integration Module (SIM) manages reset sources, low-power modes (Wait/Stop), and interrupt prioritization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | HCS08 8-bit CISC core with 16-bit address space and 40+ instructions; enables deterministic real-time control with <1 µs interrupt latency. |
| Flash Memory | 8 KB on-chip Flash with block protection and in-system programming; supports field firmware updates without external programmer. |
| RAM Size | 512 bytes of on-chip RAM; sufficient for stack, variables, and small buffers in resource-constrained control loops. |
| ADC Resolution | 10-bit successive-approximation ADC with 8 configurable inputs; delivers ±1 LSB INL/DNL for precision sensor signal acquisition. |
| Max CPU Frequency | 8 MHz at 5 V supply; provides balanced performance and power efficiency for mid-tier embedded applications. |
| I/O Pins | 24 general-purpose I/O pins with configurable pull-ups, slew-rate control, and interrupt-on-change capability; simplifies interface to switches, LEDs, and digital sensors. |
| Supply Voltage | 4.5 V to 5.5 V operation; compatible with standard TTL/CMOS logic rails and industrial 5 V power domains. |
Pinout & Package
MC908AP8CFBER is housed in a 28-pin SOIC (Small Outline Integrated Circuit) package with 1.27 mm pitch, RoHS-compliant lead finish, and JEDEC MS-012AC mechanical outline. The package supports surface-mount reflow assembly and offers thermal resistance (θJA) of 120°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power Supply | Main 5 V supply input; requires local 0.1 µF ceramic bypass capacitor to reduce noise coupling into analog/digital sections. |
| VSS | Ground Reference | Digital ground return; must be connected to system ground plane with low-inductance path to minimize EMI. |
| OSC1 / OSC2 | Crystal Oscillator Inputs | Connects to parallel-resonant quartz crystal (1–8 MHz) or external clock source; determines base timing accuracy for all peripherals. |
| RESET | Active-Low Reset Input | Asynchronous reset assertion forces CPU into known state; internal pull-up ensures reliable startup without external resistor. |
| PTA0–PTA7 | Port A I/O Pins | 8-bit bidirectional port with individual direction control; PTA0–PTA3 support keyboard interrupt (KBI) for matrix scanning. |
| PTB0–PTB7 | Port B I/O Pins | 8-bit bidirectional port; PTB0–PTB1 serve as SCI TXD/RXD; PTB2–PTB3 as SPI SCK/MOSI; PTB4–PTB5 as I²C SCL/SDA. |
| AD0–AD7 | ADC Input Channels | 8 analog input channels mapped to PTA0–PTA7; share pins with Port A, requiring software configuration for analog mode. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip Monitor ROM | 2 KB ROM containing bootloader, flash programming routines (EE_WRITE/EE_READ), and SCI-based debug interface - eliminates need for external programming hardware. |
| Low-Voltage Inhibit (LVI) | Hardware brown-out detection with 4.25 V threshold; triggers reset before Flash write corruption occurs, ensuring data integrity during power dips. |
| Computer Operating Properly (COP) | Watchdog timer with 16-bit free-running counter and software-selectable timeout (1 ms–1 s); prevents runaway code in safety-critical control loops. |
| Stop Mode Current | 1.0 µA typical at 5 V and 25°C; enables battery-powered operation for >1 year in intermittent-sensing applications. |
| Flash Endurance | 10,000 program/erase cycles per block; supports over-the-air firmware updates in field-deployed equipment. |
Applications
| Industrial Motor Control | Smart Appliance Subsystem |
|---|---|
|
Use Scenario: Closed-loop speed regulation of 24 V DC brush motors in conveyor systems using hall-effect feedback. IC Role / Device Role / Timing Role: MCU executing PID algorithm, generating PWM drive signals via TIM module, and reading ADC feedback at 10 kHz sample rate. Use Value: On-chip 10-bit ADC and hardware PWM eliminate external signal conditioning ICs, reducing BOM count by 3 components. |
Use Scenario: Temperature and user-interface management in residential washing machine control board. IC Role / Device Role / Timing Role: Reads thermistor via ADC, drives LED display through GPIO, communicates with main controller via SCI, and monitors door latch via KBI. Use Value: Integrated KBI and SCI reduce external interrupt expander and level-shifter requirements, cutting PCB area by 12%. |
| Energy Metering Sensor Node | Automotive Body Controller |
|
Use Scenario: Standby-power monitoring module measuring AC line voltage/current harmonics in smart grid endpoint devices. IC Role / Device Role / Timing Role: Samples isolated voltage/current signals at 16 kHz using ADC with internal reference, stores waveform data in RAM, and transmits via SPI to host MCU. Use Value: Internal 5 V regulator (VREG) powers external isolation amplifiers, removing need for discrete LDO and saving 0.3 W standby loss. |
Use Scenario: Interior lighting dimming and mirror adjustment control in entry-level passenger vehicles. IC Role / Device Role / Timing Role: Executes CAN message parsing (via external transceiver), drives MOSFETs for LED dimming using buffered PWM, and detects switch presses via KBI. Use Value: Hardware PWM with dead-time insertion prevents shoot-through in half-bridge drivers, improving reliability over software-timed alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC9S08QG8CDTE | Same HCS08 core, 8 KB Flash, but QG8 variant uses 16-pin TSSOP; lacks I²C and has only 4-channel ADC. | Suitable for space-constrained designs where I²C and full ADC channel count are non-critical. | Select when board layout density outweighs peripheral completeness; verify pin compatibility for GPIO and SCI routing. |
| S9KEAZ8AMLH | Kinetis E-series ARM Cortex-M0+, 8 KB Flash, 1 KB RAM, 32-pin LQFP; adds USB device, higher ADC resolution (12-bit), and lower active current. | Better suited for future-proofed designs requiring USB connectivity or migration toward 32-bit toolchains. | Choose for new designs targeting long-term roadmap alignment; requires full firmware rewrite due to architecture change. |
Compared with MC908AP8CFBER, MC9S08QG8CDTE offers smaller footprint but reduced peripheral set, while S9KEAZ8AMLH delivers modern ARM features at higher software development cost and no pin compatibility.
Availability
MC908AP8CFBER is available at Aetrix Electronics and suitable for industrial motor control, smart appliance subsystems, energy metering sensor nodes, and automotive body controllers requiring stable component supply and long-lifecycle support.
Supply support for MC908AP8CFBER 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 leader focused on secure connectivity solutions for automotive, industrial, and IoT markets, with roots in Freescale's embedded controller legacy.
The MC908AP8CFBER belongs to the HCS08 microcontroller family designed for cost-sensitive, low-power embedded control applications demanding high reliability, integrated peripherals, and robust flash memory in industrial environments.
FAQ
What is the maximum operating frequency of the MC908AP8CFBER?
The MC908AP8CFBER supports a maximum CPU frequency of 8 MHz when powered at 5 V. This frequency is achieved using the internal PLL with a crystal oscillator input or external clock source. The CGM module allows dynamic clock scaling, and the device maintains full functionality-including ADC conversions and serial communications-at this rated speed. Operation above 8 MHz is not guaranteed and may result in timing violations or data corruption.
Does the MC908AP8CFBER include an internal voltage regulator?
Yes, the MC908AP8CFBER includes an internal 5 V regulator (VREG pin) that supplies regulated power to internal analog circuitry, including the ADC reference and PLL analog section. This regulator accepts an input range of 7–18 V and outputs a stable 5 V, enabling direct connection to unregulated 12 V automotive or industrial rails without external LDOs. The VREG output must be decoupled with a 1 µF tantalum capacitor.
Can the MC908AP8CFBER perform in-system programming (ISP) of its Flash memory?
Yes, the MC908AP8CFBER supports in-system programming via its on-chip Monitor ROM. Using the SCI interface and built-in EE_WRITE/EE_READ routines, users can erase and reprogram Flash blocks without removing the device from the circuit. Programming requires a baud rate of 9600 bps and adherence to the MON command protocol documented in Chapter 8 of the datasheet. No external high-voltage programmer is needed.
What low-power modes does the MC908AP8CFBER support, and what is the typical current draw in Stop mode?
The MC908AP8CFBER supports Wait and Stop low-power modes. In Stop mode, the CPU, Flash, and most peripherals are disabled while retaining RAM contents and wake-up capability via IRQ, KBI, or SCI. Typical Stop mode current is 1.0 µA at 5 V and 25°C, making it suitable for battery-backed applications requiring multi-year standby life. Wake-up time from Stop is under 4 µs.
Is the MC908AP8CFBER pin-compatible with other members of the MC68HC908AP family?
No, the MC908AP8CFBER is not fully pin-compatible with larger variants like MC68HC908AP16/AP32/AP64. While all AP-family devices share the same SOIC-28 package footprint and core peripheral mapping, pin functions differ significantly - especially for ADC inputs, SPI/I²C signals, and reset configuration. For example, AD6/AD7 are not routed to pins on the AP8 variant. Migration requires PCB layout revision and firmware adaptation.
MC908AP8CFBER Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 44-QFP
- Series:
- HC08
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
MC908AP8CFBER FAQ
1.How can I place an order for MC908AP8CFBER through Aetrix?
Please submit a Request for Quotation (RFQ) for MC908AP8CFBER 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 MC908AP8CFBER reliable?
The price and inventory of MC908AP8CFBER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC908AP8CFBER is usually 5 days.
3.What payment methods are accepted for MC908AP8CFBER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC908AP8CFBER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC908AP8CFBER?
MC908AP8CFBER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC908AP8CFBER 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 MC908AP8CFBER?
For technical support, including MC908AP8CFBER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC908AP8CFBER requirements.
6.How does Aetrix verify that MC908AP8CFBER is sourced from the original manufacturer or authorized distributors?
All MC908AP8CFBER 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 MC908AP8CFBER meets industry standards.
7.What is the process for return or replacement of MC908AP8CFBER?
All MC908AP8CFBER units undergo pre-shipment inspection (PSI). If there is an issue with MC908AP8CFBER, 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 MC908AP8CFBER part is unused and in its original packaging.
Return procedure for MC908AP8CFBER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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