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NXP Semiconductors MC9S08QB8CGK
- Part No.:
- MC9S08QB8CGK
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 24-VQFN Exposed Pad
- Datasheet:
-
MC9S08QB8CGK.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,938
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Product details
Overview
MC9S08QB8CGK from NXP (formerly Freescale) is an 8-bit HCS08 microcontroller designed for ultra-low-power battery-operated systems. It features 8 KB flash, 512 bytes RAM, 8-channel 12-bit ADC, UART (SCI), 16-bit TPM, analog comparator, and keyboard interrupt module - all operating down to 1.8 V at 20 MHz CPU speed in industrial temperature range (-40°C to +85°C).
For engineers reviewing the MC9S08QB8CGK datasheet, MC9S08QB8CGK pinout, MC9S08QB8CGK application, or MC9S08QB8CGK equivalent, key selection considerations include its 24-pin QFN package, 6 µs wake-up from stop mode, dual ultra-low-power stop modes with peripheral retention, clock gating for dynamic power control, and compatibility with QE-family development tools like DEMO9S08QB8.
Technical Context
The MC9S08QB8CGK implements the HCS08 CPU core with backward object-code compatibility to 68HC08/68HC05, supporting bus speeds up to 10 MHz at 1.8 V. Its internal clock system integrates a frequency-locked loop (FLL) and ultra-low-power oscillator (31.25 kHz–38.4 kHz or 1–16 MHz crystal/resonator support) enabling dynamic frequency scaling to reduce current draw.
Peripherals are managed via clock gating registers, allowing selective disabling of unused modules. The 16-bit timer/pulse-width modulator (TPM) supports input capture, output compare, and edge-/center-aligned PWM, with software-relocatable channel mapping (default PTA0, optional PTB5). The ADC operates in low-power stop mode with internal bandgap reference and temperature sensor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | HCS08 8-bit core with BGND instruction; backward-compatible with 68HC08/68HC05 object code |
| Max CPU Speed | 20 MHz at 1.8–3.6 V; 10 MHz bus speed guaranteed across full voltage/temp range |
| Flash Memory | 8 KB on-chip flash with read/program/erase over full operating voltage and temperature |
| ADC Resolution | 12-bit, 8-channel; 2.5 µs conversion time; supports low-power stop mode operation |
| Wake-up Time | 6 µs typical from ultra-low-power stop mode - enables rapid response to external events |
| Operating Voltage | 1.8 V to 3.6 V - allows direct use with single-cell Li-ion or two-cell alkaline batteries |
| Temperature Range | -40°C to +85°C - qualified for industrial and residential embedded applications |
Pinout & Package
MC9S08QB8CGK is housed in a 24-pin QFN (4 × 4 mm, 0.5 mm pitch) package with wettable flanks, optimized for compact PCB layouts and automated optical inspection. Pin functions align with QB family standard I/O mapping, including dedicated SCI, TPM, ADC, KBI, and ACMP signal routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual VDD/VSS pairs ensure stable core/peripheral rail decoupling in noise-sensitive low-power designs |
| PTA0–PTA7 | Port A general-purpose I/O | Includes default TPM channel and SCI TX/RX; supports keyboard interrupt and analog input |
| PTB0–PTB7 | Port B general-purpose I/O | Includes optional TPM relocation (PTB5), ACMP inputs, and KBI-capable pins |
| EXTAL/XTAL | External oscillator connection | Supports 31.25 kHz–38.4 kHz or 1–16 MHz crystals/resonators for precise timing or ultra-low-power RTC |
| RESET | Active-low reset input | Accepts external reset or internal COP/LVD reset assertion; debounced internally |
Key Features
| Feature | Design Value |
|---|---|
| Two ultra-low-power stop modes | One mode retains RAM and selected peripherals (e.g., ADC, ACMP); enables background sensing without full wake-up |
| 6 µs wake-up from stop | Minimizes latency for event-driven responses (e.g., smoke detector alarm trigger or garage door RF command) |
| Internal clock system (ICS) with FLL | Enables dynamic clock scaling - e.g., drop to 1 MHz during idle, ramp to 20 MHz for ADC burst sampling |
| 8-channel keyboard interrupt (KBI) | Hardware-accelerated keypad scanning with polarity-selectable edges; reduces firmware overhead in remote controls |
| Flash block protection | Prevents accidental overwrite of bootloader or calibration data during field firmware updates |
Applications
| Garage Door Openers | Smoke Detectors |
|---|---|
Use Scenario: Wireless remote control receiver unit with motor actuation logic and safety sensor interface. IC Role / Device Role / Timing Role: Main system controller managing RF decoding, motor drive sequencing, and real-time obstacle detection via analog comparator. Use Value: Ultra-low-power stop modes extend battery life >2 years; 6 µs wake-up ensures immediate response to RF packet reception. | Use Scenario: Standalone photoelectric smoke alarm with self-test, low-battery warning, and audible alarm driver. IC Role / Device Role / Timing Role: Sensor fusion controller reading optical chamber signal (via ADC), temperature (internal sensor), and driving piezo buzzer via TPM PWM. Use Value: 1.8 V operation enables direct use of AA/AAA cells; internal bandgap reference ensures ADC accuracy across battery discharge curve. |
| Remote Window Shutters | Battery-Powered Toys |
Use Scenario: Solar-assisted or battery-powered motorized shutter controller receiving RF commands and monitoring position feedback. IC Role / Device Role / Timing Role: Low-power coordinator handling bidirectional RF communication (SCI), motor direction/PWM control (TPM), and end-stop sensing (ACMP). Use Value: Clock gating disables UART when idle; KBI pins detect manual override switches without CPU polling. | Use Scenario: Interactive learning toy with touch sensors, LED animations, and sound playback triggered by button presses. IC Role / Device Role / Timing Role: Embedded application processor executing game logic, driving RGB LEDs via TPM PWM, and scanning tactile inputs via KBI. Use Value: 8 KB flash accommodates multi-level firmware; 512-byte RAM with low-retention voltage preserves state during brief battery removal. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC9S08QB4CGK | 4 KB flash, same 24-pin QFN package, identical peripheral set and low-power architecture | Suitable for simpler firmware (e.g., basic remote controls without complex UI or sensor fusion) | Select when code size < 4 KB suffices and cost reduction is prioritized without sacrificing pinout or power profile |
| MC9S08QD4CGK | 4 KB flash, adds CAN 2.0B controller; otherwise matches QB8 peripheral count and low-power modes | Required where automotive-grade diagnostics or distributed sensor networks demand CAN bus integration | Choose only if CAN physical layer and protocol stack support are mandatory - adds complexity and BOM cost |
Compared with MC9S08QB8CGK, the QB4CGK offers identical packaging and power behavior at reduced memory capacity, while the QD4CGK trades flash density for CAN capability - neither is pin-compatible with QB8CGK's full feature set, but both share the same QFN footprint and core power architecture.
Availability
MC9S08QB8CGK is available at Aetrix Electronics and suitable for battery-powered toys, residential garage door openers, smoke detectors, and remote window shutter systems requiring stable component supply and long-term industrial temperature support.
Supply support for MC9S08QB8CGK 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.
The MC9S08QB8CGK belongs to NXP's legacy S08QB ultra-low-power microcontroller family, engineered specifically for cost-sensitive, long-life battery applications where sub-µA sleep current and sub-10 µs wake-up are critical design requirements.
FAQ
What is the minimum operating voltage for the MC9S08QB8CGK?
The MC9S08QB8CGK operates down to 1.8 V across its full industrial temperature range (-40°C to +85°C), enabling direct use with single-cell lithium or two-cell alkaline batteries without voltage regulation. This specification is validated per the official Freescale 9S08QB84FS datasheet Rev 2, with guaranteed 20 MHz CPU performance and full peripheral functionality at 1.8 V.
Does the MC9S08QB8CGK support in-circuit debugging?
Yes, the MC9S08QB8CGK includes an on-chip background debug module (BDM) supporting single breakpoint setting plus three additional breakpoints. It is fully compatible with NXP's USB-BDM cable and CodeWarrior Development Studio for Microcontrollers 6.2 Special Edition, enabling real-time register inspection, flash programming, and low-power mode validation during development.
What package type is used for the MC9S08QB8CGK?
The MC9S08QB8CGK uses a 24-pin QFN package (4 mm × 4 mm, 0.5 mm pitch) with wettable flanks. This package is specified in Freescale document 9S08QB84FS and confirmed across authorized distributors including Digi-Key and Mouser. It differs from the 16-pin TSSOP and 28-pin SOIC variants in the QB8 family.
Can the MC9S08QB8CGK ADC operate in low-power stop mode?
Yes, the MC9S08QB8CGK's 12-bit ADC can perform conversions in ultra-low-power stop mode using the internal bandgap reference and temperature sensor channel. This capability is explicitly documented in the "Analog-to-Digital Converter" section of the 9S08QB84FS datasheet, enabling periodic sensor sampling without full CPU wake-up.
Is the MC9S08QB8CGK pin-compatible with other QB family members?
No - the MC9S08QB8CGK (24-pin QFN) is not pin-compatible with the 16-pin TSSOP (MC9S08QB8CTG) or 28-pin SOIC (MC9S08QB8CWL) QB8 variants. While all share the same peripheral register map and instruction set, their pin counts, I/O allocations, and physical footprints differ. Pin compatibility exists only within same-package variants (e.g., QB8CGK ↔ QB4CGK).
MC9S08QB8CGK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 24-VQFN Exposed Pad
- Series:
- S08
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- S08
- Core Size:
- 8-Bit
- Speed:
- 20MHz
- Connectivity:
- LINbus, SCI
- Peripherals:
- LVD, PWM, WDT
- Number of I/O:
- 18
- Program Memory Size:
- 8KB (8K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 512 x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- A/D 8x12b
- Oscillator Type:
- External
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MC9S08QB8CGK FAQ
1.How can I place an order for MC9S08QB8CGK through Aetrix?
Please submit a Request for Quotation (RFQ) for MC9S08QB8CGK 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 MC9S08QB8CGK reliable?
The price and inventory of MC9S08QB8CGK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC9S08QB8CGK is usually 5 days.
3.What payment methods are accepted for MC9S08QB8CGK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC9S08QB8CGK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC9S08QB8CGK?
MC9S08QB8CGK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC9S08QB8CGK 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 MC9S08QB8CGK?
For technical support, including MC9S08QB8CGK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC9S08QB8CGK requirements.
6.How does Aetrix verify that MC9S08QB8CGK is sourced from the original manufacturer or authorized distributors?
All MC9S08QB8CGK 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 MC9S08QB8CGK meets industry standards.
7.What is the process for return or replacement of MC9S08QB8CGK?
All MC9S08QB8CGK units undergo pre-shipment inspection (PSI). If there is an issue with MC9S08QB8CGK, 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 MC9S08QB8CGK part is unused and in its original packaging.
Return procedure for MC9S08QB8CGK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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