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NXP Semiconductors MC9S08QE8CWJ
- Part No.:
- MC9S08QE8CWJ
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MC9S08QE8CWJ.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,046
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Product details
Overview
MC9S08QE8CWJ from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller with 8 KB flash, 512 B RAM, and integrated peripherals including 12-bit ADC, dual analog comparators, SCI, SPI, I²C, two 16-bit TPM modules, RTC, and single-wire background debug interface. It operates from 1.8 V to 3.6 V at up to 20 MHz and supports ultra-low-power stop3 mode with 0.4 µA typical current at 3 V - used in battery-powered sensor nodes and industrial control modules.
For engineers reviewing the MC9S08QE8CWJ datasheet, MC9S08QE8CWJ pinout, MC9S08QE8CWJ application, or MC9S08QE8CWJ equivalent, this page delivers verified electrical specs, QFN-32 package mapping, real-time counter integration, low-voltage detection thresholds, and functional alternatives for cost-optimized or footprint-constrained designs.
Technical Context
The MC9S08QE8CWJ implements the HCS08 CPU core with HC08 instruction set plus BGND, supporting up to 32 interrupt/reset sources and featuring a frequency-locked-loop (FLL)-based internal clock source (ICS) delivering bus frequencies from 1 MHz to 10 MHz with ±2% deviation over voltage and temperature. Its ICS includes factory-trimmed internal reference (0.2% resolution).
It integrates dual analog comparators (ACMP1/ACMP2) with edge-selectable interrupts and bandgap reference routing, a 10-channel 12-bit ADC with 2.5 µs conversion time and temperature sensor, and two 3-channel timer-pulse-width-modulation (TPM) modules supporting input capture, output compare, and PWM generation - all operational in stop3 mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | HCS08 8-bit core with BGND instruction and 32 interrupt/reset vectors |
| Flash / RAM | 8 KB flash (read/program/erase across full voltage/temperature range); 512 B RAM with security lock |
| Operating Voltage | 1.8 V to 3.6 V - enables direct Li-ion/Li-Po battery operation without external regulator |
| Max Bus Frequency | 10 MHz (ICS FLL mode) or 20 MHz (XOSC direct mode) - supports real-time control loop timing |
| ADC | 10-channel, 12-bit, 2.5 µs conversion; internal bandgap reference and 1.7 mV/°C temp sensor |
| Low-Power Modes | Stop3 mode draws 0.4 µA typical @ 3 V; 6 µs wake-up time; LPO runs RTC during deep sleep |
| Package | 32-pin QFN (2078-01), 5 mm × 5 mm, 0.5 mm pitch, exposed thermal pad |
Pinout & Package
MC9S08QE8CWJ is housed in a 32-pin QFN package (case 2078-01) with 5 mm × 5 mm body, 0.5 mm lead pitch, and exposed thermal pad for enhanced thermal dissipation in compact industrial layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core power supply | Primary 1.8–3.6 V digital supply; decoupling required per datasheet layout guidelines |
| VSS | Digital ground | Reference return for digital logic and I/O; separate from analog ground (VSSA) |
| VDDA/VREFH | Analog power / ADC reference high | Supplies ADC, ACMP, and bandgap; must be filtered and isolated from noisy digital rails |
| VSSA/VREFL | Analog ground / ADC reference low | Separate analog return path; critical for 12-bit ADC accuracy and comparator stability |
| PTA0–PTA7, PTB0–PTB7, PTC0–PTC7, PTD0–PTD3 | GPIO / peripheral multiplexing | 26 GPIOs + 1 output-only + 1 input-only; configurable pullup/pulldown, slew rate, drive strength |
| PTA4/BKGD/MS | Background debug / master select | Single-wire debug interface pin; bi-directional when configured as BKGD; enables in-circuit programming |
| PTA5/IRQ/TCLK/RESET | Interrupt / clock input / reset | Multi-function pin; open-drain RESET with internal pullup; supports external wake-up and debug clock |
| PTB6/SDA/XTAL | I²C data / crystal input | Shared I²C bus line and external crystal oscillator input - requires careful signal isolation |
| PTB7/SCL/EXTAL | I²C clock / crystal output | Shared I²C clock and crystal oscillator output - not usable simultaneously; configuration via SOPT2 |
Key Features
| Feature | Design Value |
|---|---|
| On-chip security circuitry | Prevents unauthorized read-out of flash and RAM contents - essential for firmware IP protection |
| Peripheral clock gating register | Enables selective module clock disable to reduce dynamic current in active modes |
| Low-power external oscillator (LPO) | 1 kHz on-chip oscillator enabling RTC operation and cyclic wake-up in stop2/stop3 without external components |
| Real-time counter (RTC) | 8-bit modulus counter with binary/decimal prescaler; free-running in all MCU modes including stop3 |
| Single-wire background debug (BDC) | Enables full in-circuit debugging using only PTA4 - reduces PCB routing complexity and debug connector size |
Applications
| Smart Sensor Node | Industrial Motor Control |
|---|---|
Use Scenario: Battery-powered environmental sensor collecting temperature, humidity, and motion data for wireless transmission every 5 minutes. IC Role / Device Role / Timing Role: Main system controller managing ADC sampling, RTC-based scheduling, low-power state transitions, and SCI UART communication to transceiver. Use Value: Stop3 mode (0.4 µA) extends 2xAA battery life beyond 5 years; integrated 1.7 mV/°C sensor eliminates external thermistor. |
Use Scenario: Compact BLDC motor driver board requiring precise PWM timing, fault monitoring, and serial command interface. IC Role / Device Role / Timing Role: Real-time PWM generator (TPM1/TPM2), analog comparator for overcurrent detection, and SCI for host command parsing. Use Value: Dual TPM modules deliver independent 3-channel PWM with center-aligned capability; ACMP outputs routed to TPM for hardware-triggered shutdown. |
| Home Automation Controller | Medical Wearable Monitor |
Use Scenario: Zigbee-enabled lighting controller interpreting I²C commands from touch panel and driving LED dimming via PWM. IC Role / Device Role / Timing Role: I²C slave interface, TPM-driven LED dimming, KBI for button inputs, and background debug for field firmware updates. Use Value: I²C multi-master support allows coexistence with other sensors; programmable KBI polarity handles mechanical switch bounce without software debounce. |
Use Scenario: Disposable pulse oximeter using photodiode signals conditioned by internal ADC and comparators. IC Role / Device Role / Timing Role: Analog front-end controller acquiring synchronized red/IR ADC samples, computing SpO₂ ratio, and transmitting via low-energy SCI. Use Value: 12-bit ADC with internal bandgap reference ensures stable gain calibration; ACMP1/ACMP2 enable fast LED current limiting and ambient light rejection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC9S08QG8CDT | 4 KB flash, 512 B RAM, same HCS08 core but no RTC or ACMP2; 16-pin TSSOP only | Lacks RTC and second comparator - unsuitable for time-scheduled wake-up or dual-threshold sensing | Select when footprint and cost are primary constraints and RTC/ACMP2 functionality is unused |
| S9KEAZ128AMLH | Kinetis E-series ARM Cortex-M0+, 128 KB flash, 16 KB RAM, 48 MHz, integrated USB, larger QFP package | Higher performance, richer peripheral set, but higher power and BOM cost; requires toolchain migration | Choose for future-proofing, USB connectivity, or when >10 MHz deterministic throughput is required |
Compared with MC9S08QE8CWJ, MC9S08QG8CDT offers lower cost and smaller footprint but sacrifices RTC and analog comparator flexibility, while S9KEAZ128AMLH provides scalable performance and modern peripherals at the expense of increased power and design complexity.
Availability
MC9S08QE8CWJ is available at Aetrix Electronics and suitable for smart sensor nodes, industrial motor controllers, home automation hubs, and medical wearable monitors requiring stable component supply, long-term lifecycle support, and qualified automotive-grade reliability.
Supply support for MC9S08QE8CWJ 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, IoT, mobile, and communication infrastructure markets.
The MC9S08QE8CWJ belongs to the HCS08 family - designed specifically for cost-sensitive, ultra-low-power embedded control applications where small code footprint, minimal external components, and robust analog integration are critical.
FAQ
What is the maximum operating frequency of the MC9S08QE8CWJ?
The MC9S08QE8CWJ supports up to 20 MHz when using the external crystal oscillator (XOSC) directly, and up to 10 MHz when using the internal clock source (ICS) with its frequency-locked-loop (FLL). The FLL achieves ±2% accuracy over voltage and temperature, making it suitable for timing-critical control loops without external crystals.
Does the MC9S08QE8CWJ support real-time clock (RTC) functionality in low-power modes?
Yes, the MC9S08QE8CWJ includes a dedicated real-time counter (RTC) that operates in all MCU modes, including stop3. It can run from the on-chip low-power oscillator (LPO) at 1 kHz, enabling precise time-of-day tracking and cyclic wake-up without external components - confirmed in Section 3.10.1 and Figure 1 of the Rev. 8 datasheet.
What package type is used for the MC9S08QE8CWJ?
The MC9S08QE8CWJ uses a 32-pin QFN package (case number 2078-01), measuring 5 mm × 5 mm with 0.5 mm pitch and an exposed thermal pad. This package replaced earlier gold-wire variants with copper-wire interconnect per Freescale's QFN Addendum Rev. 0 (July 2014), improving thermal performance and wirebond reliability.
How many analog-to-digital converter (ADC) channels does the MC9S08QE8CWJ have?
The MC9S08QE8CWJ features a 10-channel, 12-bit successive-approximation ADC with 2.5 µs conversion time, automatic compare function, internal bandgap reference channel, and integrated 1.7 mV/°C temperature sensor. All channels remain fully functional from 1.8 V to 3.6 V and operate in stop3 mode per Section 3.12 of the Rev. 8 datasheet.
Is the MC9S08QE8CWJ pin-compatible with other members of the QE8 series?
The MC9S08QE8CWJ shares identical pinout and electrical characteristics with other 32-pin QFN variants in the MC9S08QE8 series, including MC9S08QE8CLH and MC9S08QE8CP. Pin compatibility is confirmed across all 32-pin packages (QFN and LQFP) per Table 1 and Figures 2–5 in the Rev. 8 datasheet - though voltage ratings and thermal resistance differ slightly between QFN and LQFP.
MC9S08QE8CWJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Series:
- S08
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- S08
- Core Size:
- 8-Bit
- Speed:
- 20MHz
- Connectivity:
- I2C, LINbus, SCI, SPI
- Peripherals:
- LVD, PWM, WDT
- Number of I/O:
- 16
- 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:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MC9S08QE8CWJ FAQ
1.How can I place an order for MC9S08QE8CWJ through Aetrix?
Please submit a Request for Quotation (RFQ) for MC9S08QE8CWJ 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 MC9S08QE8CWJ reliable?
The price and inventory of MC9S08QE8CWJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC9S08QE8CWJ is usually 5 days.
3.What payment methods are accepted for MC9S08QE8CWJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC9S08QE8CWJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC9S08QE8CWJ?
MC9S08QE8CWJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC9S08QE8CWJ 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 MC9S08QE8CWJ?
For technical support, including MC9S08QE8CWJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC9S08QE8CWJ requirements.
6.How does Aetrix verify that MC9S08QE8CWJ is sourced from the original manufacturer or authorized distributors?
All MC9S08QE8CWJ 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 MC9S08QE8CWJ meets industry standards.
7.What is the process for return or replacement of MC9S08QE8CWJ?
All MC9S08QE8CWJ units undergo pre-shipment inspection (PSI). If there is an issue with MC9S08QE8CWJ, 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 MC9S08QE8CWJ part is unused and in its original packaging.
Return procedure for MC9S08QE8CWJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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