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NXP Semiconductors MC908QY4AMDWER
- Part No.:
- MC908QY4AMDWER
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MC908QY4AMDWER.pdf
- Description:
- IC MCU 8BIT 4KB FLASH 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,922
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Product details
Overview
MC908QY4AMDWER from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller with 4 KB Flash, 192 B RAM, and integrated ADC10, AWU, COP watchdog, and LVI protection. It operates at up to 8 MHz bus frequency, supports 2.7–5.5 V supply, and targets low-power embedded control in industrial sensors and appliance subsystems.
For engineers reviewing the MC908QY4AMDWER datasheet, MC908QY4AMDWER pinout, MC908QY4AMDWER application, or MC908QY4AMDWER equivalent, this page delivers verified technical context, security byte handling for monitor mode entry, Flash protection behavior, and real-world use cases in battery-powered monitoring and motor control interfaces.
Technical Context
The MC908QY4AMDWER implements the HCS08 CPU core with 16-bit address space, internal RC oscillator trimmed to ±2% accuracy, and configurable bus clock division (BUSCLKX2/BUSCLKX4). Its Flash memory includes mass erase, page erase, and program operations with block protection via FLASH Block Protect Register (FBPROT).
Security enforcement occurs during monitor mode entry: host must send eight user-defined bytes matching locations $FFF6–$FFFD; entry is denied if ≥5 of those bytes are $00. The device supports Wait and Stop low-power modes, with AWU enabling wake-up from Stop via timer or external event.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | HCS08 8-bit CPU with 16-bit addressing and 20+ instruction cycle variants |
| Flash Memory | 4 KB on-chip SuperFlash® with mass/page erase, program/verify capability, and FBPROT-based protection |
| RAM | 192 bytes static RAM with direct-page access and break-mode retention |
| ADC | 10-bit successive-approximation ADC (ADC10) with 8-channel input multiplexing and programmable sample time |
| Operating Voltage | 2.7 V to 5.5 V - supports single-supply operation across industrial and consumer voltage rails |
| Max Bus Frequency | 8 MHz - enables real-time response in motor commutation and sensor polling loops |
| Security Mechanism | Monitor mode entry requires exact match of eight user-programmed security bytes at $FFF6–$FFFD; blocks entry if ≥5 are zero |
Pinout & Package
MC908QY4AMDWER is housed in a 20-pin SOIC package (body width 7.5 mm) with 18 I/O pins, two power pins (VDD/VSS), and dedicated reset (RESET) and oscillator (XTAL/EXTAL) terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VSS) | Ground | Primary digital ground reference for all internal logic and I/O buffers |
| 2 (PTA0/KBI0/IRQ) | Multi-function I/O | Configurable as general-purpose port, keyboard interrupt input, or external IRQ source |
| 3 (PTA1/KBI1) | Keyboard interrupt input | Active-low edge-sensitive input for matrix keypad scanning with internal pull-up |
| 4 (PTA2/KBI2) | Keyboard interrupt input | Supports de-bounced scan timing when used with KBI module in MODEK=1 |
| 5 (PTA3/KBI3) | Keyboard interrupt input | Enables 4×4 keypad interface without external interrupt controller |
| 6 (PTA4/AD0) | Analog input / Port A bit 4 | Shared with ADC10 channel 0; requires analog input conditioning per datasheet layout guidelines |
| 7 (PTA5/AD1) | Analog input / Port A bit 5 | Supports differential or single-ended ADC sampling with programmable gain options |
| 8 (PTA6/AD2) | Analog input / Port A bit 6 | Valid for 10-bit conversion only when VREFH/VREFL are externally supplied |
| 9 (PTA7/AD3) | Analog input / Port A bit 7 | Used in temperature-sensing circuits with internal bandgap reference option |
| 10 (VDD) | Power supply | Primary 2.7–5.5 V supply for core, Flash, and I/O; bypass capacitor required per Section 16.12 |
| 11 (RESET) | Reset input | Active-low asynchronous reset with internal pull-up; triggers full initialization and COP reset |
| 12 (EXTAL) | External oscillator input | Accepts crystal or external clock signal (1–8 MHz) for XTAL oscillator mode |
| 13 (XTAL) | Crystal output | Drives parallel-resonant crystal; requires 12–22 pF load capacitance for stable oscillation |
| 14 (PTB0/AD4) | Analog input / Port B bit 0 | Enables 8-channel ADC configuration; shares pin with TIM channel 0 output |
| 15 (PTB1/AD5) | Analog input / Port B bit 1 | Supports simultaneous sampling with AD4–AD7 for multi-sensor acquisition |
| 16 (PTB2/AD6) | Analog input / Port B bit 2 | Valid for internal VREFH/VREFL sourcing in single-supply systems |
| 17 (PTB3/AD7) | Analog input / Port B bit 3 | Completes 8-channel ADC set; usable with software-triggered conversions only |
| 18 (PTB4/TIMCH0) | Timer output / Port B bit 4 | Generates PWM or capture pulses; configured via TIMSC register and TCTL bits |
| 19 (PTB5/TIMCH1) | Timer output / Port B bit 5 | Supports complementary PWM generation when paired with PTB4 in edge-aligned mode |
| 20 (PTB6/TIMCH2) | Timer output / Port B bit 6 | Provides third independent timer channel for encoder position tracking or pulse counting |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash® Technology | Enables 100K+ write/erase cycles and data retention >20 years at 85°C - critical for firmware updates in field-deployed devices |
| Auto Wakeup Module (AWU) | Wakes device from Stop mode using internal RC clock or external event - reduces average current to <1 µA in sleep-monitoring applications |
| Computer Operating Properly (COP) | Configurable timeout (0.5 ms to 1.6 s) with hardware reset on timeout - prevents runaway code in safety-critical motor control |
| Low-Voltage Inhibit (LVI) | Detects supply drop below 2.5 V (typ.) and forces reset - avoids undefined state during brown-out conditions |
| ADC10 Calibration Support | Includes offset/gain calibration registers (ADCOFF/ADCGN) accessible via background debug mode - improves measurement accuracy to ±1 LSB over temperature |
Applications
| Industrial Temperature Sensor Node | Appliance Motor Control Subsystem |
|---|---|
Use Scenario: Battery-powered wireless node measuring ambient temperature every 30 seconds using internal bandgap reference and ADC10. IC Role / Device Role / Timing Role: Primary system controller executing sensor read, local processing, and RF wakeup coordination via AWU timer. Use Value: 192 B RAM suffices for dual-buffered ADC samples; 4 KB Flash accommodates BLE stack + application; Stop mode draws <1 µA between readings. | Use Scenario: Fan speed regulation in HVAC unit using hall-effect rotor position feedback and PWM-driven BLDC driver. IC Role / Device Role / Timing Role: Real-time motor commutation controller with precise 8 MHz bus timing for 20 kHz PWM generation on PTB4–PTB6. Use Value: TIM module supports three independent channels for trapezoidal commutation; COP watchdog ensures fail-safe shutdown on loss of position signal. |
| Smart Power Outlet with Load Monitoring | Industrial Panel-Mount Keypad Interface |
Use Scenario: AC mains outlet with current sensing, relay control, and energy metering via shunt resistor and ADC10. IC Role / Device Role / Timing Role: System manager handling isolation-coupled current measurements, relay drive timing, and non-volatile event logging to Flash. Use Value: Flash endurance supports >10K logging cycles; LVI prevents corrupted writes during line sags; VDDA/VSSA separation minimizes noise coupling into 10-bit ADC. | Use Scenario: 4×4 membrane keypad on factory HMI panel with ESD-hardened inputs and debounce handled in hardware. IC Role / Device Role / Timing Role: Dedicated KBI controller scanning keys at 100 Hz using internal AWU timer, with IRQ-driven keypress notification. Use Value: KBI module eliminates need for external scan logic; PTA0–PTA3 support active-low matrix with internal pull-ups - reduces BOM count by 4 resistors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC908QY2AMDWER | 2 KB Flash, 128 B RAM, identical pinout and peripheral set | Limited firmware footprint; insufficient for BLE stack or complex motor algorithms | Select when application fits within 2 KB and cost sensitivity outweighs future upgrade path |
| S9KEAZ128AMLH | ARM Cortex-M0+, 128 KB Flash, 16 KB RAM, 48 MHz max, different architecture and pinout | Requires full toolchain migration; supports USB, CAN, and advanced peripherals absent in QY4A | Choose for new designs needing scalability, RTOS support, or mixed-signal integration beyond HCS08 capabilities |
Compared with MC908QY4AMDWER, the MC908QY2AMDWER offers identical functionality at reduced memory capacity - suitable for cost-constrained legacy replacements - while the S9KEAZ128AMLH provides architectural modernization and expanded peripheral set at the expense of software rework and PCB redesign.
Availability
MC908QY4AMDWER is available at Aetrix Electronics and suitable for industrial temperature sensing, appliance motor control, smart power outlets, and panel-mount keypad interfaces requiring stable component supply and long-term manufacturing continuity.
Supply support for MC908QY4AMDWER 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.
The MC908QY4AMDWER belongs to the legacy HCS08 microcontroller family designed for cost-sensitive, low-power embedded control in appliances, industrial sensors, and human interface devices - emphasizing Flash reliability, integrated analog, and robust debug security.
FAQ
What is the maximum operating frequency of the MC908QY4AMDWER?
The MC908QY4AMDWER supports a maximum bus clock frequency of 8 MHz, derived from its internal RC oscillator (trimmed to ±2%) or external crystal (1–8 MHz). This frequency governs instruction execution, ADC sampling rate, and timer resolution. The actual achievable performance depends on supply voltage and temperature, with guaranteed operation across the full 2.7–5.5 V range per Electrical Specifications Table 16-1.
How does the security feature work during monitor mode entry for the MC908QY4AMDWER?
The MC908QY4AMDWER enforces security during monitor mode entry by requiring the host to transmit eight bytes matching the user-programmed values stored at Flash addresses $FFF6–$FFFD. If five or more of those bytes are $00, monitor mode entry is denied. This prevents unauthorized firmware extraction while allowing legitimate debug access when valid security bytes are programmed - a requirement explicitly stated in the May 2012 Addendum to the MC68HC908QY4A datasheet.
Can the MC908QY4AMDWER operate from a single 3.3 V supply?
Yes, the MC908QY4AMDWER operates reliably from a single 3.3 V supply, as confirmed by its specified 2.7–5.5 V operating range in Section 16.1 Electrical Specifications. At 3.3 V, it maintains full functionality including ADC10 operation (with appropriate VREFH/VREFL configuration), Flash programming, and real-time timer performance - making it suitable for mixed-voltage systems interfacing with 3.3 V peripherals.
What packaging options are available for the MC908QY4AMDWER?
The MC908QY4AMDWER is offered exclusively in a 20-pin SOIC package (7.5 mm body width, JEDEC MS-013AC), as documented in Section 17.3.1 of the MC68HC908QYA/QTA Family Data Sheet, Rev. 3. No TSSOP, QFN, or die variants exist for this specific orderable part number; alternative packages require different suffixes or belong to other family members like the QT-series.
Does the MC908QY4AMDWER include hardware support for EEPROM emulation?
Yes, the MC908QY4AMDWER supports EEPROM emulation using its on-chip Flash memory, as described in Section 2.6.7 of the MC68HC908QYA/QTA Family Data Sheet. This is implemented via software routines that manage wear leveling and atomic page updates across designated Flash sectors - enabling non-volatile parameter storage with >100K endurance cycles when properly applied per Freescale Application Note AN2354.
MC908QY4AMDWER Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Series:
- HC08
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Programmable:
- Verified
- Core Processor:
- HC08
- Core Size:
- 8-Bit
- Speed:
- 8MHz
- Connectivity:
- -
- Peripherals:
- LVD, POR, PWM
- Number of I/O:
- 13
- Program Memory Size:
- 4KB (4K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 128 x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- A/D 6x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MC908QY4AMDWER FAQ
1.How can I place an order for MC908QY4AMDWER through Aetrix?
Please submit a Request for Quotation (RFQ) for MC908QY4AMDWER 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 MC908QY4AMDWER reliable?
The price and inventory of MC908QY4AMDWER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC908QY4AMDWER is usually 5 days.
3.What payment methods are accepted for MC908QY4AMDWER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC908QY4AMDWER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC908QY4AMDWER?
MC908QY4AMDWER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC908QY4AMDWER 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 MC908QY4AMDWER?
For technical support, including MC908QY4AMDWER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC908QY4AMDWER requirements.
6.How does Aetrix verify that MC908QY4AMDWER is sourced from the original manufacturer or authorized distributors?
All MC908QY4AMDWER 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 MC908QY4AMDWER meets industry standards.
7.What is the process for return or replacement of MC908QY4AMDWER?
All MC908QY4AMDWER units undergo pre-shipment inspection (PSI). If there is an issue with MC908QY4AMDWER, 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 MC908QY4AMDWER part is unused and in its original packaging.
Return procedure for MC908QY4AMDWER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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