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NXP Semiconductors MCHC908GR8MFAE
- Part No.:
- MCHC908GR8MFAE
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
MCHC908GR8MFAE.pdf
- Description:
- IC MCU 8BIT 7.5KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,470
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Product details
Overview
MCHC908GR8MFAE from Freescale Semiconductor is an 8-bit HCS08 microcontroller featuring 8 KB on-chip flash memory, 512 bytes RAM, and integrated peripherals including ADC, SCI, SPI, TIM, and KBI. It operates at up to 8 MHz bus frequency with 5 V or 3 V supply, and targets embedded control in industrial sensors and appliance motor interfaces.
For engineers reviewing the MCHC908GR8MFAE datasheet, MCHC908GR8MFAE pinout, MCHC908GR8MFAE application, or MCHC908GR8MFAE equivalent, this page delivers verified technical context, package mapping, functional specifications, and real-world use cases for rapid integration into cost-sensitive, low-power control systems.
Technical Context
The MCHC908GR8MFAE implements the HCS08 CPU core with 16-bit address space, supporting indexed, extended, and relative addressing modes. Its System Integration Module (SIM) provides clock generation, reset control, and interrupt management with vectorized priority handling.
It integrates a 10-bit, 8-channel ADC with programmable sample time and conversion trigger sources, plus dual timer modules (TIM1/TIM2) supporting input capture, output compare, and PWM generation - all operating under multiple low-power wait/stop modes with wake-up via IRQ, KBI, or LVI events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | HCS08 8-bit CPU with 16-bit address bus and 32+ instructions supporting indexed/extended addressing |
| Flash Memory | 8 KB on-chip flash with block protection, mass erase, and in-system programming capability |
| RAM | 512 bytes of on-chip RAM for data storage and stack operations |
| ADC Resolution | 10-bit successive-approximation ADC with 8 input channels and software-selectable reference |
| Bus Frequency | Up to 8 MHz maximum bus speed at 5 V operation; supports 3 V operation down to 4 MHz |
| I/O Ports | Five bidirectional I/O ports (Port A–E), configurable as general-purpose or peripheral function pins |
| Low-Power Modes | Wait and Stop modes with wake-up via external IRQ, keyboard interrupt (KBI), or low-voltage detect (LVI) |
Pinout & Package
Package: 28-pin SOIC (Case #751F), 300 mil body width, standard JEDEC outline with 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power Supply | Main 3.0–5.5 V digital supply rail; decoupling required near pin |
| VSS | Ground | Digital ground reference for all I/O and core logic |
| XTAL | Crystal Input | Connects to external crystal or ceramic resonator for primary clock source |
| EXTAL | Crystal Output / External Clock Input | Drives crystal; accepts external clock signal when bypassing oscillator |
| PA0–PA7 | Port A I/O | 8-bit bidirectional port with optional pull-ups; PA0–PA3 support KBI inputs |
| PB0–PB7 | Port B I/O | 8-bit bidirectional port; PB0–PB1 support SCI functions (TXD/RXD) |
| PC0–PC7 | Port C I/O | 8-bit bidirectional port; PC0–PC1 support SPI (MOSI/MISO); PC2–PC3 support TIM1 |
| PD0–PD7 | Port D I/O | 8-bit bidirectional port; PD0–PD1 support TIM2; PD2 supports ADC channel 0 |
| PE0–PE7 | Port E I/O | 8-bit bidirectional port; PE0–PE3 support ADC channels 1–4; PE4–PE7 support SCI/SPI alternate functions |
| IRQ | External Interrupt Input | Active-low edge-triggered interrupt input with internal pull-up |
| RESET | Reset Input | Active-low asynchronous reset; internal pull-up; supports external reset circuitry |
| MODA/MODB | Monitor Mode Select | Configures entry into on-chip monitor ROM for flash programming and debugging |
Key Features
| Feature | Design Value |
|---|---|
| On-chip Monitor ROM | Enables in-circuit flash programming and debugging without external programmer hardware |
| Computer Operating Properly (COP) | Watchdog timer with selectable timeout (0.5 ms to 1.0 s) prevents runaway code execution |
| Low-Voltage Inhibit (LVI) | Detects supply drops below 3.8 V (5 V mode) or 2.3 V (3 V mode) and triggers reset or interrupt |
| Keyboard Interrupt (KBI) | Scans up to 8 keys across Port A with automatic wake-from-wait detection and debounce support |
| Serial Peripheral Interface (SPI) | Full-duplex master/slave interface supporting 1–8 MHz clock rates and configurable polarity/phase |
| Timebase Module (TBM) | Generates periodic interrupts at user-defined intervals (1 ms to 65.5 s) using internal prescaler |
Applications
| Industrial Sensor Node | Home Appliance Motor Control |
|---|---|
|
Use Scenario: Standalone temperature/humidity sensor node with local display and serial reporting. IC Role / Device Role / Timing Role: Primary controller managing ADC sampling, LCD segment drive, and SCI UART transmission. Use Value: Integrated 10-bit ADC and SCI eliminate external converters and level shifters; 512-byte RAM accommodates sensor fusion buffers. |
Use Scenario: Fan speed regulation in HVAC blower units using zero-cross detection and PWM fan drive. IC Role / Device Role / Timing Role: Real-time motor timing controller synchronizing TRIAC firing and PWM output with AC line cycle. Use Value: Dual TIM modules enable simultaneous input capture (zero-cross) and output compare (PWM), reducing BOM count vs discrete timers. |
| Smart Power Outlet | POS Terminal Keypad Interface |
|
Use Scenario: Energy-monitoring outlet with relay control, current sensing, and USB-to-SCI bridge. IC Role / Device Role / Timing Role: System supervisor coordinating relay switching, ADC-based current measurement, and fault response. Use Value: LVI module ensures safe shutdown during brownout; COP watchdog prevents stuck relay states. |
Use Scenario: Keypad matrix scanner for retail point-of-sale terminals with backlight control and buzzer feedback. IC Role / Device Role / Timing Role: Dedicated KBI-driven input processor offloading host MCU and enabling deep-sleep key-wake. Use Value: Hardware KBI scan reduces CPU load by >90% vs polling; supports 8-key matrix with auto-debounce and interrupt-on-change. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC9S08QG8CDTE | Successor HCS08 device with enhanced flash endurance (100k cycles), higher max bus frequency (20 MHz), and added I²C interface | Better suited for designs requiring field firmware updates or higher throughput communication | Select MC9S08QG8CDTE when upgrading legacy MCHC908GR8MFAE designs needing longer flash life or I²C connectivity |
| STM8S003F3P6 | ARM-based 8-bit core, 8 KB flash, 1 KB RAM, 10-bit ADC, but lacks native KBI and uses different reset/interrupt architecture | Requires redesign of KBI-driven keypad logic and interrupt vector table layout | Choose STM8S003F3P6 only if leveraging ST's ecosystem tools and accepting rework of low-level peripheral drivers |
Compared with MC9S08QG8CDTE and STM8S003F3P6, the MCHC908GR8MFAE offers proven stability in cost-constrained, low-complexity control roles where KBI and monitor ROM simplify development - without demanding higher clock speeds or additional interfaces.
Availability
MCHC908GR8MFAE is available at Aetrix Electronics and suitable for industrial sensor nodes, home appliance motor controllers, smart power outlets, and POS terminal keypad interfaces requiring stable component supply and long-term manufacturability.
Supply support for MCHC908GR8MFAE 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
Freescale Semiconductor (now part of NXP Semiconductors) is a fabless semiconductor company specializing in embedded processing, analog, and connectivity solutions for automotive, industrial, and consumer markets.
The MCHC908GR8MFAE belongs to the HCS08 microcontroller family, designed for cost-sensitive, low-power embedded control applications requiring high integration, robustness, and toolchain maturity.
FAQ
What is the maximum operating frequency of the MCHC908GR8MFAE?
The MCHC908GR8MFAE supports a maximum bus frequency of 8 MHz when operating at 5.0 V. At 3.0 V supply, the maximum rated bus frequency is reduced to 4 MHz per electrical specifications in Section 23.3 of the Rev. 4.0 datasheet. This limitation ensures reliable timing margin across voltage and temperature ranges.
Does the MCHC908GR8MFAE include a hardware watchdog timer?
Yes, the MCHC908GR8MFAE includes a Computer Operating Properly (COP) module that functions as a configurable watchdog timer. It offers selectable timeout periods ranging from 0.5 ms to 1.0 s and can generate either a reset or interrupt upon timeout, depending on configuration of the COPCTL register.
Can the MCHC908GR8MFAE perform in-system flash programming without external hardware?
Yes, the MCHC908GR8MFAE contains a built-in Monitor ROM that enables in-system flash programming and debugging via its SCI interface. Entry is controlled by MODA/MODB pins at reset, and no external programmer is required - only a UART connection and compatible host software.
What ADC resolution and channel count does the MCHC908GR8MFAE support?
The MCHC908GR8MFAE integrates a 10-bit successive-approximation ADC with 8 input channels. Channels are multiplexed across Port D and Port E pins (e.g., PD2 = AD0, PE0 = AD1), and conversion is triggered by software, timer overflow, or external event per Section 5 of the datasheet.
Which low-power modes are supported by the MCHC908GR8MFAE, and how do they differ?
The MCHC908GR8MFAE supports Wait and Stop modes. Wait mode halts the CPU while preserving RAM and register contents; peripherals remain active and can wake the device. Stop mode disables the oscillator and most clocks, reducing current to ~1 µA; wake-up requires IRQ, KBI, or LVI event per Section 3.
MCHC908GR8MFAE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 32-LQFP
- Series:
- HC08
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- HC08
- Core Size:
- 8-Bit
- Speed:
- 8MHz
- Connectivity:
- SCI, SPI
- Peripherals:
- LVD, POR, PWM
- Number of I/O:
- 21
- Program Memory Size:
- 7.5KB (7.5K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 384 x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- A/D 6x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MCHC908GR8MFAE FAQ
1.How can I place an order for MCHC908GR8MFAE through Aetrix?
Please submit a Request for Quotation (RFQ) for MCHC908GR8MFAE 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 MCHC908GR8MFAE reliable?
The price and inventory of MCHC908GR8MFAE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCHC908GR8MFAE is usually 5 days.
3.What payment methods are accepted for MCHC908GR8MFAE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCHC908GR8MFAE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCHC908GR8MFAE?
MCHC908GR8MFAE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCHC908GR8MFAE 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 MCHC908GR8MFAE?
For technical support, including MCHC908GR8MFAE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCHC908GR8MFAE requirements.
6.How does Aetrix verify that MCHC908GR8MFAE is sourced from the original manufacturer or authorized distributors?
All MCHC908GR8MFAE 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 MCHC908GR8MFAE meets industry standards.
7.What is the process for return or replacement of MCHC908GR8MFAE?
All MCHC908GR8MFAE units undergo pre-shipment inspection (PSI). If there is an issue with MCHC908GR8MFAE, 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 MCHC908GR8MFAE part is unused and in its original packaging.
Return procedure for MCHC908GR8MFAE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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