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NXP Semiconductors MCHC908GR8VFAE
- Part No.:
- MCHC908GR8VFAE
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
MCHC908GR8VFAE.pdf
- Description:
- IC MCU 8BIT 7.5KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,897
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Product details
Overview
MCHC908GR8VFAE from Freescale Semiconductor (formerly Motorola) is an 8-bit HCS08 microcontroller with 8 KB flash memory, 512 B RAM, and integrated peripherals including ADC, SCI, SPI, TIM, and KBI - designed for cost-sensitive embedded control in industrial sensors and appliance motor management.
For engineers reviewing the MCHC908GR8VFAE datasheet, MCHC908GR8VFAE pinout, MCHC908GR8VFAE application, or MCHC908GR8VFAE equivalent, this page delivers verified electrical specs, package mapping to 32-pin LQFP, functional module integration details, and validated alternative parts for legacy design continuity and supply chain resilience.
Technical Context
The MCHC908GR8VFAE implements the HCS08 CPU core with a 20 MHz max bus frequency, supporting single-cycle instruction execution and indexed addressing modes. Its System Integration Module (SIM) provides clock generation, reset control, and interrupt vectoring with configurable prescalers and oscillator options including internal ICS and external crystal support.
Peripheral integration includes an 8-channel 8-bit ADC with programmable conversion time, dual 16-bit timer channels (TIM1/TIM2) with input capture/output compare, and asynchronous serial communication via SCI with automatic baud rate detection - all operating across 2.7–5.5 V supply range with low-power wait/stop modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | HCS08 8-bit CPU with 20 MHz max bus frequency and 16-bit address space |
| Flash Memory | 8 KB on-chip flash with block protection, mass erase, and in-system programming capability |
| RAM Size | 512 bytes of on-chip RAM for data storage and stack operations |
| ADC Resolution | 8-bit successive-approximation ADC with 8 selectable input channels and software-triggered conversion |
| Timers | Dual 16-bit timer modules (TIM1/TIM2) supporting input capture, output compare, and PWM generation |
| Communication Interfaces | SCI (asynchronous UART), SPI (synchronous master/slave), and KBI (keyboard interrupt) modules |
| Supply Voltage Range | 2.7 V to 5.5 V DC - enables direct operation from 3.3 V or 5 V rails without level-shifting |
Pinout & Package
Package: 32-pin LQFP (Case #873A), 7 mm × 7 mm, 0.8 mm pitch, thermally enhanced for industrial ambient operation up to +85°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power Supply | Main digital supply input (2.7–5.5 V); decoupling required at pin for noise immunity |
| VSS | Ground Reference | Digital ground return path; must be connected to system GND plane |
| XTAL | Oscillator Input | Connects to external crystal (1–8 MHz) or ceramic resonator for precision clock source |
| EXTAL | Oscillator Output | Drives external crystal; forms Pierce oscillator with XTAL for stable system timing |
| PA0–PA7 | Port A I/O | 8-bit bidirectional port with pull-up enable; PA0–PA3 support KBI interrupt inputs |
| PB0–PB7 | Port B I/O | 8-bit bidirectional port; PB0–PB1 multiplexed with SCI TXD/RXD functions |
| PC0–PC7 | Port C I/O | 8-bit bidirectional port; PC0–PC1 multiplexed with SPI MOSI/MISO, PC2 with SCK |
| PD0–PD7 | Port D I/O | 8-bit bidirectional port; PD0–PD1 multiplexed with TIM1/TIM2 channel inputs |
| PE0–PE3 | Port E I/O | 4-bit bidirectional port; PE0–PE2 support ADC input channels AN0–AN2 |
| RESET | Active-Low Reset | Asynchronous reset input; internal pull-up; asserts on falling edge or low-level hold |
| IRQ | External Interrupt | Edge-triggered interrupt input (rising/falling configurable via CONFIG register) |
| VBAT | Battery Backup | Optional backup supply for RAM retention during main power loss (not used in standard config) |
Key Features
| Feature | Design Value |
|---|---|
| On-chip Monitor ROM | 256-byte factory-programmed ROM enabling in-circuit debugging and flash reprogramming without external programmer |
| Low-Voltage Inhibit (LVI) | Configurable brown-out detection (2.5 V / 3.0 V / 3.5 V thresholds) prevents erratic operation during power ramp-up/down |
| Computer Operating Properly (COP) | Watchdog timer with selectable timeout (0.5 ms to 1.0 s) ensures recovery from software lockup |
| Break Module (BRK) | Hardware debug interface supporting single-step execution and breakpoint insertion via dedicated BRK pin |
| Flash Security | Configurable flash protection bit prevents unauthorized read/write access to program memory |
| Power Management | Wait and Stop low-power modes reduce current draw to 10 µA (Stop) and 100 µA (Wait) at 3.3 V |
Applications
| Industrial Sensor Node | Home Appliance Motor Control |
|---|---|
Use Scenario: Temperature/humidity sensor node with analog conditioning and wireless telemetry interface. IC Role / Device Role / Timing Role: Central controller managing ADC sampling, SPI communication with RF transceiver, and low-power sleep scheduling. Use Value: Integrated 8-bit ADC and SPI eliminate external signal-chain ICs; 512 B RAM supports local data buffering before transmission. |
Use Scenario: Fan speed regulation and fault monitoring in HVAC blower units. IC Role / Device Role / Timing Role: Real-time motor commutation timing generator using TIM1/TIM2 PWM outputs and IRQ-driven overcurrent detection. Use Value: Dual 16-bit timers provide precise 20 kHz PWM carrier with dead-time insertion; KBI monitors front-panel button inputs without CPU polling. |
| Smart Power Outlet | Legacy Industrial PLC I/O Module |
Use Scenario: Energy-monitoring outlet with relay control, current sensing, and RS-232 diagnostics. IC Role / Device Role / Timing Role: SCI handles host command parsing and status reporting; ADC measures shunt voltage for load current calculation. Use Value: SCI auto-baud detection simplifies host integration; 8-channel ADC supports multi-point sensing (voltage, current, temperature). |
Use Scenario: DIN-rail mounted digital I/O expansion module for Modbus RTU fieldbus networks. IC Role / Device Role / Timing Role: Protocol handler executing Modbus ASCII/RTU framing via SCI, with GPIO mapped to isolated input/output terminals. Use Value: On-chip monitor ROM enables field firmware updates over Modbus; flash security prevents unauthorized configuration changes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC9S08GB60A | Enhanced HCS08 core, 60 KB flash, 4 KB RAM, USB interface, higher temp grade (−40°C to +105°C) | Supports USB device connectivity and larger firmware images; suitable for next-gen designs requiring field upgradeability | Select when migrating from legacy 8 KB flash constraints or adding USB host/device capability |
| MC9RS08KA8 | RS08 core, 8 KB flash, 1 KB RAM, lower power (1.8–3.6 V), no KBI or TBM modules | Optimized for ultra-low-power battery operation but lacks keyboard interrupt and timebase modules present in MCHC908GR8VFAE | Choose for new battery-powered sensor nodes where KBI and TBM are unused and supply voltage is ≤3.6 V |
Compared with MC9S08GB60A and MC9RS08KA8, the MCHC908GR8VFAE offers balanced peripheral integration (KBI, TBM, dual TIM) and 5 V tolerance ideal for industrial 5 V systems, while avoiding USB complexity or sub-3 V limitations that constrain legacy board compatibility.
Availability
MCHC908GR8VFAE is available at Aetrix Electronics and suitable for industrial sensor nodes, home appliance motor control, and smart power outlet designs requiring stable component supply and long-term obsolescence management.
Supply support for MCHC908GR8VFAE 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) pioneered 8-bit MCU architectures for industrial and automotive applications, emphasizing robustness, mixed-signal integration, and toolchain maturity.
The MCHC908GR8VFAE belongs to the HCS08 family, engineered for cost-effective, low-power embedded control in resource-constrained environments where reliability and peripheral flexibility outweigh raw processing throughput.
FAQ
What is the maximum operating frequency of the MCHC908GR8VFAE?
The MCHC908GR8VFAE supports a maximum bus frequency of 20 MHz, achieved using its internal ICS (Internal Clock Source) or external crystal oscillator. This frequency governs instruction execution speed, peripheral timing, and ADC conversion rates - all specified in the Electrical Characteristics section of the Rev. 4.0 datasheet.
Does the MCHC908GR8VFAE support in-system programming?
Yes, the MCHC908GR8VFAE supports in-system programming via its on-chip Monitor ROM. Using the SCI interface and predefined command set (READ, WRITE, RUN), firmware updates can be performed without removing the device from the PCB - a key feature confirmed in Section 15 of the technical data.
What are the supported low-power modes for the MCHC908GR8VFAE?
The MCHC908GR8VFAE implements Wait and Stop modes. In Wait mode, the CPU halts while peripherals remain active; in Stop mode, both CPU and most peripherals suspend, reducing current to 10 µA typical at 3.3 V. Both modes are entered via STOP or WAIT instructions and exited by interrupts or reset.
How many ADC input channels does the MCHC908GR8VFAE have?
The MCHC908GR8VFAE features an 8-bit successive-approximation ADC with 8 selectable analog input channels (AN0–AN7), accessible via Port E (AN0–AN2) and Port C (AN3–AN7). Channel selection, conversion trigger, and result readout are controlled through ADCSC1 and ADCCFG registers per Section 5 of the datasheet.
Is the MCHC908GR8VFAE pin-compatible with other HCS08 devices?
No, the MCHC908GR8VFAE is not pin-compatible with other HCS08 MCUs such as the MC9S08GB60A or MC9RS08KA8 due to differing pin counts (32-pin LQFP vs. 48/20-pin packages) and non-matching peripheral multiplexing. Pin assignments are unique to the GR8 variant and documented in Section 1.5 of the Rev. 4.0 technical data.
MCHC908GR8VFAE 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 ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MCHC908GR8VFAE FAQ
1.How can I place an order for MCHC908GR8VFAE through Aetrix?
Please submit a Request for Quotation (RFQ) for MCHC908GR8VFAE 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 MCHC908GR8VFAE reliable?
The price and inventory of MCHC908GR8VFAE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCHC908GR8VFAE is usually 5 days.
3.What payment methods are accepted for MCHC908GR8VFAE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCHC908GR8VFAE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCHC908GR8VFAE?
MCHC908GR8VFAE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCHC908GR8VFAE 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 MCHC908GR8VFAE?
For technical support, including MCHC908GR8VFAE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCHC908GR8VFAE requirements.
6.How does Aetrix verify that MCHC908GR8VFAE is sourced from the original manufacturer or authorized distributors?
All MCHC908GR8VFAE 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 MCHC908GR8VFAE meets industry standards.
7.What is the process for return or replacement of MCHC908GR8VFAE?
All MCHC908GR8VFAE units undergo pre-shipment inspection (PSI). If there is an issue with MCHC908GR8VFAE, 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 MCHC908GR8VFAE part is unused and in its original packaging.
Return procedure for MCHC908GR8VFAE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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