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NXP Semiconductors MC9S08QD4MSCR
- Part No.:
- MC9S08QD4MSCR
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MC9S08QD4MSCR.pdf
- Description:
- IC MCU 8BIT 4KB FLASH 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,738
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Product details
Overview
MC9S08QD4MSCR from NXP (formerly Freescale) is an 8-bit HCS08 microcontroller with 16 MHz CPU, 4 KB Flash, 256 B RAM, and integrated ADC, dual timers, and background debug interface - designed for cost-sensitive embedded control in industrial sensors and small-appliance motor management.
For engineers reviewing the MC9S08QD4MSCR datasheet, MC9S08QD4MSCR pinout, MC9S08QD4MSCR application, or MC9S08QD4MSCR equivalent, key selection criteria include Flash/RAM size, ICS-based clock stability (±2% over temp/voltage), single-wire BDM debug support, and 8-pin SOIC package compatibility with legacy QD-series designs.
Technical Context
The MC9S08QD4MSCR implements the HCS08 CPU core with HC08 instruction set plus BGND, supporting up to 32 interrupt/reset sources and hardware breakpoint debugging via on-chip debug module. Its Internal Clock Source (ICS) uses a frequency-locked loop (FLL) with precision-trimmed internal reference (0.2% resolution, ±2% deviation over temperature and supply voltage).
Peripherals include a 4-channel 10-bit ADC with temperature sensor and bandgap reference, two independent timer/PWM modules (TIM1 with 2 channels, TIM2 with 1 channel), and a 4-pin keyboard interrupt (KBI) module with software-selectable edge/level sensitivity. All I/O pins support configurable pullups, slew rate, and drive strength.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | HCS08 8-bit CPU running at 16 MHz - enables deterministic real-time control with low latency interrupt response. |
| Flash Memory | 4096 bytes - sufficient for firmware with ADC calibration, PWM motor profiles, and BDM bootloader. |
| RAM Size | 256 bytes - supports stack depth for nested interrupts and local variable storage in compact control loops. |
| ADC Resolution | 10-bit, 4-channel - delivers 1 mV LSB at 1 V reference for precise analog sensing in battery monitoring or thermal feedback. |
| Timer Modules | TIM1 (2-channel) + TIM2 (1-channel) - each supports input capture, output compare, and edge/center-aligned PWM for dual-motor or LED dimming control. |
| Debug Interface | Single-wire background debug (BDM) - enables in-circuit programming and breakpoint debugging without dedicated JTAG pins. |
| Operating Voltage | 2.7–5.5 V - compatible with both 3.3 V logic systems and legacy 5 V industrial interfaces. |
Pinout & Package
MC9S08QD4MSCR is housed in an 8-pin SOIC package (RoHS compliant), with pin assignments validated per Freescale MC9S08QD4 Rev. 7 datasheet Section 2.1. The device features four general-purpose I/O pins, one input-only (IRQ), one output-only (RESET), and dedicated BKGD/MS for debug mode selection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Separate analog/digital power domains not implemented - single VDD/VSS pair simplifies PCB layout for low-pin-count applications. |
| PTA0–PTA3 | General-purpose I/O | Software-configurable as input (with pullup) or output (10 mA sink/source, 60 mA total package limit). |
| IRQ | Interrupt request input | Active-low, internal pullup enabled by default - eliminates external resistor for basic wake-up or fault signaling. |
| RESET | Reset input | Active-low, internal pullup - ensures reliable reset assertion during power-up without external RC network. |
| BKGD/MS | Background debug / mode select | Single-wire BDM communication and boot-mode control - enables firmware update and debug using only one GPIO. |
Key Features
| Feature | Design Value |
|---|---|
| Internal Clock Source (ICS) with FLL | Eliminates external crystal requirement while maintaining ±2% bus clock accuracy across –40°C to 125°C and 2.7–5.5 V. |
| Hardware-triggered ADC | RTI counter can initiate conversions autonomously - enables precise timing of sensor sampling without CPU intervention. |
| Flash block protection | Prevents accidental overwrite of bootloader or calibration data - critical for field-upgradable devices with long service life. |
| Low-power stop modes (Stop2/Stop3) | Reduces current to <1 µA with LVD and RTI active - extends battery life in intermittent-sensing applications like smoke detectors. |
| On-chip COP watchdog | Configurable timeout sourced from dedicated 32 kHz internal clock - ensures system recovery even if main clock fails. |
Applications
| Industrial Temperature Sensor Node | Small-Appliance Motor Controller |
|---|---|
|
Use Scenario: Standalone wireless temperature node measuring ambient and heatsink temperatures in HVAC ducts using thermistor inputs. IC Role / Device Role / Timing Role: Primary controller executing ADC sampling, linearization, and RF transmission scheduling. Use Value: Integrated 10-bit ADC with internal bandgap reference and temperature sensor enables factory-calibrated readings without external components. |
Use Scenario: Fan speed regulation in portable air purifiers using hall-effect rotor position feedback and PWM-driven BLDC driver. IC Role / Device Role / Timing Role: Real-time motor commutation controller managing TIM1/TIM2 for synchronized phase timing and fault detection. Use Value: Dual timer modules support simultaneous edge-aligned PWM generation and input capture - eliminating need for external timing ICs. |
| Smart Power Outlet Monitoring | Legacy Equipment Retrofit Module |
|
Use Scenario: Energy-monitoring outlet that samples AC voltage/current via resistive dividers and shunt, then computes RMS and power factor. IC Role / Device Role / Timing Role: Signal acquisition and computation engine interfacing with isolated sigma-delta ADC or analog front-end. Use Value: 4-channel ADC with automatic compare function triggers interrupt on overvoltage threshold - enabling fast shutdown response. |
Use Scenario: Drop-in replacement board adding digital control to analog-only legacy lab equipment (e.g., DC power supplies). IC Role / Device Role / Timing Role: System supervisor handling front-panel button scan (via KBI), display update timing, and serial command parsing. Use Value: 4-pin KBI with software-selectable edge/level sensitivity supports diverse switch types without external debounce circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| S9S08QD4CTG | Automotive-grade variant (AEC-Q100 qualified), identical Flash/RAM/peripherals but rated for –40°C to 125°C and qualified for automotive EMI/ESD environments. | Required for under-hood or dashboard-mounted automotive subsystems; not necessary for industrial or consumer use. | Select S9S08QD4CTG only when AEC-Q100 compliance and extended temperature operation are mandatory. |
| MC9S08QG4CDTE | Same HCS08 core and peripheral set, but in 16-pin TSSOP; adds UART and additional I/O - higher pin count and no BKGD pin (uses SWD instead). | Suitable for designs needing serial communication or more GPIOs; incompatible pinout and debug interface prevents drop-in replacement. | Choose MC9S08QG4CDTE when UART connectivity or expanded I/O is required, accepting PCB redesign. |
Compared with MC9S08QD4MSCR, S9S08QD4CTG offers automotive qualification at same footprint and debug interface, while MC9S08QG4CDTE trades pin compatibility for added peripherals and different debug architecture - making MC9S08QD4MSCR optimal for space-constrained, cost-sensitive non-automotive control where single-wire BDM is essential.
Availability
MC9S08QD4MSCR is available at Aetrix Electronics and suitable for industrial temperature sensing, small-appliance motor control, and smart power outlet monitoring requiring stable component supply and long-term lifecycle support.
Supply support for MC9S08QD4MSCR 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 MC9S08QD4MSCR belongs to the HCS08 QD-series - a family of ultra-low-cost, 8-pin microcontrollers engineered for simple, high-volume embedded control tasks where minimal footprint, debug simplicity, and robustness outweigh processing complexity.
FAQ
What is the maximum operating frequency of the MC9S08QD4MSCR CPU?
The MC9S08QD4MSCR features an HCS08 CPU core with a maximum bus frequency of 16 MHz. This is achieved via its integrated Internal Clock Source (ICS) with Frequency-Locked Loop (FLL), which multiplies the internal reference clock - no external crystal is required to reach full speed. The MC9S08QD4MSCR maintains this performance across its full operating voltage range (2.7–5.5 V) and temperature range (–40°C to 125°C).
Does the MC9S08QD4MSCR support in-circuit debugging, and what interface is used?
Yes, the MC9S08QD4MSCR supports in-circuit debugging via a single-wire Background Debug Mode (BDM) interface using the BKGD/MS pin. This allows full read/write memory access, breakpoint setting (one active breakpoint plus two in debug module), and register inspection without halting real-time peripheral operation. The MC9S08QD4MSCR does not require JTAG or SWD hardware - only a compatible BDM pod or debugger with single-wire protocol support.
What are the Flash and RAM capacities of the MC9S08QD4MSCR?
The MC9S08QD4MSCR contains 4096 bytes of on-chip Flash memory and 256 bytes of RAM. Flash supports read/program/erase over full voltage and temperature ranges, with block protection to safeguard bootloader or calibration data. RAM is sufficient for stack usage in interrupt-heavy applications and local variable storage in compact control algorithms executed by the MC9S08QD4MSCR.
Can the MC9S08QD4MSCR generate PWM signals, and how many channels are available?
Yes, the MC9S08QD4MSCR integrates two independent timer/PWM modules: TIM1 (2-channel) and TIM2 (1-channel). Each channel supports input capture, output compare, and buffered edge-aligned or center-aligned PWM - enabling simultaneous control of up to three PWM outputs. This capability makes the MC9S08QD4MSCR suitable for fan speed control, LED dimming, or basic motor commutation without external timer ICs.
Is the MC9S08QD4MSCR pin-compatible with other QD-series microcontrollers?
The MC9S08QD4MSCR in 8-pin SOIC shares identical pinout and electrical characteristics with MC9S08QD2MSCR and S9S08QD4CTG in the same package - enabling direct substitution where Flash/RAM requirements align. However, it is not pin-compatible with QG-series or larger QD variants (e.g., 16-pin versions), as those introduce additional signals like UART or extra I/O not present on the MC9S08QD4MSCR.
MC9S08QD4MSCR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- S08
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- S08
- Core Size:
- 8-Bit
- Speed:
- 16MHz
- Connectivity:
- -
- Peripherals:
- LVD, POR, PWM, WDT
- Number of I/O:
- 4
- Program Memory Size:
- 4KB (4K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 256 x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- A/D 4x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MC9S08QD4MSCR FAQ
1.How can I place an order for MC9S08QD4MSCR through Aetrix?
Please submit a Request for Quotation (RFQ) for MC9S08QD4MSCR 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 MC9S08QD4MSCR reliable?
The price and inventory of MC9S08QD4MSCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC9S08QD4MSCR is usually 5 days.
3.What payment methods are accepted for MC9S08QD4MSCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC9S08QD4MSCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC9S08QD4MSCR?
MC9S08QD4MSCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC9S08QD4MSCR 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 MC9S08QD4MSCR?
For technical support, including MC9S08QD4MSCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC9S08QD4MSCR requirements.
6.How does Aetrix verify that MC9S08QD4MSCR is sourced from the original manufacturer or authorized distributors?
All MC9S08QD4MSCR 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 MC9S08QD4MSCR meets industry standards.
7.What is the process for return or replacement of MC9S08QD4MSCR?
All MC9S08QD4MSCR units undergo pre-shipment inspection (PSI). If there is an issue with MC9S08QD4MSCR, 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 MC9S08QD4MSCR part is unused and in its original packaging.
Return procedure for MC9S08QD4MSCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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