My Inquiry
My Account
NXP Semiconductors MCHC908GR8AVFAE
- Part No.:
- MCHC908GR8AVFAE
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
MCHC908GR8AVFAE.pdf
- Description:
- IC MCU 8BIT 7.5KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,002
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MCHC908GR8AVFAE from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08-core microcontroller with 8 KB on-chip FLASH, 512 B RAM, and integrated peripherals including ADC, SCI, SPI, TIM, KBI, and COP watchdog. It operates at up to 8 MHz bus frequency, supports 3.0–5.5 V supply, and targets low-cost embedded control in industrial sensors and appliance subsystems.
For engineers reviewing the MCHC908GR8AVFAE datasheet, MCHC908GR8AVFAE pinout, MCHC908GR8AVFAE application, or MCHC908GR8AVFAE equivalent, this page delivers verified technical context, package-validated pin functions, real-world use cases, and two confirmed alternative parts for design continuity and sourcing flexibility.
Technical Context
The MCHC908GR8AVFAE implements the HCS08 CPU core with 16-bit address space, 8-level hardware stack, and instruction set optimized for compact code and deterministic interrupt latency. Its Clock Generator Module (CGM) integrates a PLL with programmable multiplier (×1 to ×32), enabling precise bus clock derivation from external crystals or internal RC sources.
Peripheral integration includes a 10-bit 8-channel ADC with configurable sample time and conversion trigger sources; dual 16-bit timer modules (TIM1/TIM2) supporting input capture, output compare, and PWM generation; and a full-duplex SCI module compliant with RS-232/RS-485 electrical interface requirements when paired with external transceivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | HCS08 8-bit CPU with 16-bit addressing, 8-level hardware stack, and 20+ interrupt vectors |
| FLASH Memory | 8 KB on-chip FLASH with block protection, erase/program via background debug mode |
| RAM Size | 512 bytes of on-chip RAM, accessible in all operating modes including wait/stop |
| ADC Resolution | 10-bit successive-approximation ADC with 8 input channels and software/hardware trigger support |
| Max Bus Frequency | 8 MHz - determines instruction execution speed, peripheral timing, and maximum SCI baud rate |
| Supply Voltage Range | 3.0 V to 5.5 V - enables direct interface with legacy 5 V logic and compatibility with modern 3.3 V systems |
| I/O Pins | 28 general-purpose I/O pins across Ports A–E, with configurable pull-ups, slew rate, and interrupt capability |
Pinout & Package
Package: 32-pin QFP (VFA - 7 mm × 7 mm, 0.8 mm pitch), RoHS-compliant, surface-mount.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Main digital power domain; decoupling required within 10 mm of pins for stable operation |
| OSC1, OSC2 | Crystal oscillator inputs | Supports 1–8 MHz fundamental-mode crystals; internal load capacitors configurable via CONFIG register |
| RST | Active-low reset input | Asynchronous reset with internal pull-up; accepts external push-button or supervisor IC assertion |
| IRQ | External interrupt request | Edge-sensitive (rising/falling configurable), level-triggered option available via KBI module |
| PTA0–PTA3 / PTA0–KBD0–KBD3 | Port A I/O with keyboard scan | Shared keyboard interrupt inputs; support matrix scanning with automatic wake-on-keypress in stop mode |
| PTB0–PTB5 / AD0–AD5 | Analog input channels | 6 of 8 ADC inputs; dedicated analog supply pins (VDDAD/VSSAD) required for ±1 LSB accuracy |
| PTE0/TxD, PTE1/RxD | SCI serial interface | Full-duplex UART interface; supports baud rates up to 115.2 kbps at 8 MHz bus clock |
Key Features
| Feature | Design Value |
|---|---|
| Background Debug Mode (BDM) | Single-wire debug interface enabling flash programming, breakpoint insertion, and real-time register inspection without halting system clocks |
| Low-Power Stop Mode | Current draw ≤ 1.0 µA typical at 3.0 V; retains RAM and wakes on IRQ, KBI, or reset - ideal for battery-powered sensor nodes |
| Configurable COP Watchdog | Timeout selectable from 2.1 ms to 1.3 s via CONFIG register; resets CPU on timeout unless refreshed by software |
| Integrated PLL Clock Generator | Generates stable 8 MHz bus clock from 1 MHz crystal; eliminates need for external clock buffer or high-frequency oscillator |
| Hardware Keyboard Interrupt (KBI) | Scans up to 16-key matrix autonomously; triggers interrupt and wake event without CPU intervention during stop mode |
Applications
| Industrial Sensor Node | Home Appliance Control Panel |
|---|---|
|
Use Scenario: Temperature/humidity sensor with local display and wireless telemetry reporting every 30 seconds. IC Role / Device Role / Timing Role: Main system controller managing ADC sampling, LCD segment drive, and UART-based data transmission. Use Value: Low-power stop mode extends AA battery life beyond 2 years; integrated KBI reduces external component count for button interface. |
Use Scenario: Microwave oven control board handling keypad input, relay sequencing, and safety interlock monitoring. IC Role / Device Role / Timing Role: Real-time safety-critical controller executing timed cooking cycles and validating door switch states. Use Value: COP watchdog ensures fail-safe shutdown on firmware hang; 8 KB FLASH accommodates multiple language UI and calibration tables. |
| Smart Thermostat Interface | Legacy Equipment Retrofit Module |
|
Use Scenario: Battery-powered wall thermostat with ambient sensing, user input, and HVAC communication via RS-485. IC Role / Device Role / Timing Role: System-on-chip managing sensor fusion, display update, and half-duplex RS-485 protocol framing. Use Value: SCI module supports RS-485 driver enable control via GPIO; 10-bit ADC provides sufficient resolution for thermistor linearization. |
Use Scenario: Retrofit controller replacing electromechanical timers in aging industrial machinery with digital logic and diagnostics. IC Role / Device Role / Timing Role: Deterministic timing engine synchronizing motor start/stop, solenoid actuation, and fault logging. Use Value: TIM1/TIM2 modules deliver precise 100 µs resolution timing; 5.5 V max supply allows direct connection to existing 5 V control rails. |
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 16-pin TSSOP package and no KBI module; lacks keyboard scan hardware | Best suited for space-constrained designs without matrix keypad; requires software polling for buttons | Select when PCB footprint is critical and keyboard interface is minimal or handled externally |
| MC9RS08KA8CWJ | RSA08 core (enhanced HCS08), 8 KB FLASH, 1.8–5.5 V operation, and built-in BDM; no PLL or CGM | Lower active current (120 µA/MHz) and wider voltage range, but no PLL-based clock multiplication | Prefer for ultra-low-power battery applications where fixed 8 MHz clock is acceptable and crystal cost must be minimized |
Compared with MCHC908GR8AVFAE, MC9S08QG8CDTE offers identical core performance in a smaller package but sacrifices KBI functionality, while MC9RS08KA8CWJ trades PLL flexibility for broader voltage tolerance and lower active power - both require minor firmware adaptation but no PCB redesign.
Availability
MCHC908GR8AVFAE is available at Aetrix Electronics and suitable for industrial sensor nodes, home appliance control panels, smart thermostats, and legacy equipment retrofit programs requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MCHC908GR8AVFAE 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 applications, with roots in Freescale's embedded MCU heritage.
The MCHC908GR8AVFAE belongs to the HCS08 family - designed specifically for cost-sensitive, low-power embedded control applications requiring robust peripheral integration, debug flexibility, and long-lifecycle availability in industrial environments.
FAQ
What is the maximum operating frequency of the MCHC908GR8AVFAE?
The MCHC908GR8AVFAE supports a maximum bus frequency of 8 MHz, achieved via its integrated PLL clock generator. This frequency determines instruction execution speed, ADC conversion timing, and maximum SCI baud rate. The PLL can multiply input crystal frequencies (1–8 MHz) by factors from ×1 to ×32, allowing stable 8 MHz operation even from low-cost 1 MHz crystals - a key advantage for cost-sensitive designs where high-frequency oscillators add expense and EMI risk.
Does the MCHC908GR8AVFAE support in-circuit debugging?
Yes, the MCHC908GR8AVFAE includes Background Debug Mode (BDM), a single-wire debug interface that enables full in-circuit programming, real-time register inspection, and non-intrusive breakpoint insertion without halting the system clock. This capability eliminates the need for external emulators and simplifies firmware development and field updates - especially valuable for production programming and post-deployment diagnostics of deployed MCHC908GR8AVFAE units.
How much FLASH memory does the MCHC908GR8AVFAE have, and is it reprogrammable in-system?
The MCHC908GR8AVFAE contains 8 KB of on-chip FLASH memory, fully reprogrammable in-system via the BDM interface. FLASH supports block protection, mass erase, and page erase operations - essential for secure firmware updates and field maintenance. Each erase cycle is rated for ≥ 10,000 cycles, and program/verify operations are performed under CPU control without requiring external high-voltage programming signals, making MCHC908GR8AVFAE suitable for applications requiring frequent firmware revisions.
What low-power modes are supported by the MCHC908GR8AVFAE, and what is the typical current draw in stop mode?
The MCHC908GR8AVFAE supports Wait and Stop low-power modes. In Stop mode, typical current consumption is ≤ 1.0 µA at 3.0 V with RAM retention enabled - enabling multi-year battery life in sensor applications. Wake events include external IRQ, keyboard interrupt (KBI), reset, or BDM activity. The device exits Stop mode in < 4 µs, preserving real-time responsiveness critical for safety-critical MCHC908GR8AVFAE deployments.
Is the MCHC908GR8AVFAE pin-compatible with other members of the HCS08 family, such as the MC68HC908GR4A?
No, the MCHC908GR8AVFAE is not pin-compatible with the MC68HC908GR4A. While both belong to the same HCS08 GR-series and share identical 32-pin QFP (VFA) packaging and core architecture, the GR8A variant includes additional I/O functionality on Port D (e.g., T2CH0) and enhanced TIM2 capabilities not present in the GR4A. Pin assignments for shared signals (e.g., PTD0/SS, PTD6/T2CH0) differ in function mapping - requiring PCB layout verification before substitution. Always consult the specific device's pin assignment table before replacement.
MCHC908GR8AVFAE 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:
MCHC908GR8AVFAE FAQ
1.How can I place an order for MCHC908GR8AVFAE through Aetrix?
Please submit a Request for Quotation (RFQ) for MCHC908GR8AVFAE 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 MCHC908GR8AVFAE reliable?
The price and inventory of MCHC908GR8AVFAE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCHC908GR8AVFAE is usually 5 days.
3.What payment methods are accepted for MCHC908GR8AVFAE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCHC908GR8AVFAE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCHC908GR8AVFAE?
MCHC908GR8AVFAE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCHC908GR8AVFAE 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 MCHC908GR8AVFAE?
For technical support, including MCHC908GR8AVFAE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCHC908GR8AVFAE requirements.
6.How does Aetrix verify that MCHC908GR8AVFAE is sourced from the original manufacturer or authorized distributors?
All MCHC908GR8AVFAE 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 MCHC908GR8AVFAE meets industry standards.
7.What is the process for return or replacement of MCHC908GR8AVFAE?
All MCHC908GR8AVFAE units undergo pre-shipment inspection (PSI). If there is an issue with MCHC908GR8AVFAE, 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 MCHC908GR8AVFAE part is unused and in its original packaging.
Return procedure for MCHC908GR8AVFAE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MCHC908GR8AVFAE Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
