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NXP Semiconductors MC9S08JS8CWJ
- Part No.:
- MC9S08JS8CWJ
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MC9S08JS8CWJ.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:373
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Product details
Overview
MC9S08JS8CWJ from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller with 8 KB flash, 512 bytes RAM, USB 2.0 full-speed interface, and 24-pin QFN package. It operates at up to 48 MHz CPU frequency and 24 MHz bus speed, featuring MCG clock generator, TPM timer/PWM, SCI, SPI, RTC, and CRC hardware. It targets embedded USB peripheral control in industrial sensors and low-power human-interface devices.
For engineers reviewing the MC9S08JS8CWJ datasheet, MC9S08JS8CWJ pinout, MC9S08JS8CWJ application, or MC9S08JS8CWJ equivalent, this page delivers verified technical context, real-world design meaning for key specs, validated pin functions, confirmed alternatives, and supply-chain support for production deployment.
Technical Context
The MC9S08JS8CWJ implements the HCS08 CPU core with 48 MHz maximum operation and 24 MHz bus frequency, supported by the Multi-Purpose Clock Generator (MCG) offering FLL- and PLL-based modes including PEE, FBE, and BLPE. Its USB module integrates a full-speed transceiver with dedicated 3.3 V regulator (VUSB33), endpoint 0 plus six configurable endpoints, and suspend current as low as 273.3 μA.
Peripherals include one 2-channel 16-bit TPM with edge-aligned PWM and buffered centered PWM, one SCI with LIN master/slave break generation/detection, one SPI with hardware match, 8-pin KBI, 8-bit MTIM, and hardware CRC16-CCITT generator. Power management supports Wait, Stop2, and Stop3 modes, with LVD, COP watchdog, and RTC retention down to 0.6 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | HCS08 8-bit core, 48 MHz max CPU clock - enables real-time deterministic control in resource-constrained systems |
| Flash / RAM | 8 KB on-chip flash (block-protected, secure), 512 bytes RAM - sufficient for USB HID firmware + sensor logic without external memory |
| USB Interface | USB 2.0 full-speed (12 Mbps), integrated transceiver and 3.3 V regulator - eliminates external PHY and LDO for cost-sensitive USB peripherals |
| Operating Voltage | 2.7–5.5 V - supports direct connection to 3.3 V or 5 V system rails without level-shifting |
| Temperature Range | –40 °C to +85 °C - qualified for industrial ambient environments without derating |
| Package | 24-pin QFN (98ASA00734D), 4 × 4 mm, 0.5 mm pitch - compact footprint compatible with automated SMT assembly |
| Low-Power Modes | Stop3 mode draws 1.50 μA (5 V), +300 nA with RTC active - enables multi-year battery life in wake-on-event applications |
Pinout & Package
MC9S08JS8CWJ uses a 24-pin QFN package (case number 98ASA00734D), thermally enhanced with exposed pad, RoHS-compliant, and optimized for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PTB0 / IRQ / TCLK | Interrupt request input / timer clock source | Configurable as edge-triggered interrupt or external clock input for TPM - enables event-driven wake-up or precise timing capture |
| PTB1 / RESET | Active-low reset input | Internal pullup reduces BOM count; accepts standard pushbutton or supervisor IC assertion - simplifies reset circuitry |
| PTB2 / BKGD/MS | Background debug / master select | Single-wire debug interface for flash programming and run-time inspection - eliminates need for JTAG header |
| USBDP / USBDN | USB differential data pair | Integrated ESD protection and impedance-matched routing - meets USB-IF full-speed signal integrity requirements |
| VUSB33 | USB 3.3 V regulator output | Stable 3.3 V supply for internal USB transceiver - decouples USB power from main VDD, improving noise immunity |
| PTA6 / RxD / KBIP6 | SCI receive / keyboard interrupt input | Dual-function pin supports UART communication or capacitive touch sensing - maximizes I/O utility in pin-limited designs |
Key Features
| Feature | Design Value |
|---|---|
| USB Bootloader ROM (4 KB) | Enables field firmware updates over USB without external programmer - reduces service cost and supports remote maintenance |
| Hardware CRC16-CCITT engine | Offloads checksum calculation from CPU during firmware update or data logging - improves throughput and ensures data integrity |
| Programmable drive strength & slew rate | Reduces EMI and signal ringing on long traces or noisy boards - eliminates need for external series resistors or ferrites |
| Internal pullups/pulldowns (20–65 kΩ) | Eliminates external biasing components on KBI, IRQ, RESET, and BKGD pins - cuts BOM cost and board area |
| Real-time counter with binary/decimal prescaler | Provides accurate timekeeping during Stop3 mode with <300 nA overhead - enables calendar-based wake-up or periodic sampling |
Applications
| Industrial Sensor Node | USB Human Interface Device |
|---|---|
|
Use Scenario: Temperature/humidity sensor with local display and USB configuration port. IC Role / Device Role / Timing Role: Main controller executing sensor readout, LCD refresh, and USB HID report handling; TPM generates precise 100 ms sampling interval. Use Value: Integrated USB transceiver and 8 KB flash allow standalone configuration via PC without external USB-UART bridge or EEPROM. |
Use Scenario: Programmable mechanical keyboard with per-key RGB lighting and macro storage. IC Role / Device Role / Timing Role: USB HID device controller managing key matrix scan, debouncing, and RGB PWM timing via TPM channels. Use Value: Hardware CRC and bootloader enable secure, over-the-air firmware updates; KBI supports 8-key rollover with no external diodes. |
| Low-Power Data Logger | Embedded USB Diagnostic Tool |
|
Use Scenario: Battery-powered environmental logger recording data every 5 minutes to internal flash. IC Role / Device Role / Timing Role: System-on-chip managing RTC wake-up, ADC sampling, flash write, and USB mass-storage emulation on connect. Use Value: Stop3 mode with RTC active draws only 1.8 μA total - extends CR2032 battery life beyond 2 years. |
Use Scenario: Field-service tool for reading CAN bus diagnostics via USB-to-CAN translation. IC Role / Device Role / Timing Role: USB CDC ACM device bridging SCI (configured for LIN/CAN physical layer) to host PC serial port. Use Value: SCI's LIN break generation/detection and 13-bit break support simplify implementation of ISO 14229 UDS transport layer. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit USB microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC9S08JS16CWJ | 16 KB flash, same package/peripherals - double program memory with identical pinout and firmware compatibility | Suitable when firmware size exceeds 8 KB or future feature expansion is anticipated | Select if code growth headroom or dual-bank flash security features are required; otherwise MC9S08JS8CWJ optimizes cost |
| MC9RS08KB12CWJ | Smaller 12 KB flash but 8-pin DFN package (98ASA00602D); lacks USB, TPM, and SCI - reduced peripheral set | Applicable only in non-USB, low-pin-count control tasks (e.g., simple LED driver or GPIO expander) | Choose only when USB and advanced timers are unnecessary and board space is extremely constrained |
Compared with MC9S08JS16CWJ, MC9S08JS8CWJ offers optimal cost/performance balance for USB HID and sensor applications requiring ≤8 KB firmware; versus MC9RS08KB12CWJ, it provides full USB capability and richer timing/peripheral resources essential for connected device development.
Availability
MC9S08JS8CWJ is available at Aetrix Electronics and suitable for industrial sensor nodes, USB human-interface devices, low-power data loggers, and embedded diagnostic tools requiring stable component supply across multi-year production cycles.
Supply support for MC9S08JS8CWJ 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, with deep heritage in microcontrollers dating to the Motorola 6800 family.
The MC9S08JS8CWJ belongs to the HCS08 USB microcontroller product line, designed specifically for cost-sensitive, USB-enabled embedded peripherals requiring robust real-time control, low-power operation, and field-upgradable firmware.
FAQ
What is the maximum operating frequency of the MC9S08JS8CWJ CPU core?
The MC9S08JS8CWJ CPU core runs at a maximum frequency of 48 MHz, with corresponding 24 MHz bus frequency. This performance level is achieved using the MCG's PEE mode with external crystal and PLL enabled. The MC9S08JS8CWJ maintains full functionality-including USB, TPM, and SCI-at this speed, making it suitable for real-time USB HID and sensor fusion applications where deterministic timing is critical.
Does the MC9S08JS8CWJ include an integrated USB transceiver?
Yes, the MC9S08JS8CWJ integrates a full-speed USB 2.0 transceiver compliant with USB specification 2.0, supporting 12 Mbps data rates. It includes dedicated circuitry for USBDP/USBDN differential signaling, on-chip 3.3 V regulator (VUSB33), and internal termination - eliminating the need for external PHY, LDO, or resistive termination components in standard USB implementations.
What package type and dimensions does the MC9S08JS8CWJ use?
The MC9S08JS8CWJ is packaged in a 24-pin QFN (quad flat no-lead) with case number 98ASA00734D, measuring 4 mm × 4 mm with 0.5 mm pin pitch and an exposed thermal pad. This RoHS-compliant package supports automated reflow assembly and provides superior thermal performance compared to SOIC variants, making it ideal for compact, thermally demanding industrial modules.
Can the MC9S08JS8CWJ operate from a single 3.3 V supply?
Yes, the MC9S08JS8CWJ operates across a supply range of 2.7 V to 5.5 V, fully supporting 3.3 V nominal operation. At 3.3 V, it delivers 18.74 mA typical run current (PEE mode, 48 MHz), 1.18 μA Stop2 current, and retains full USB functionality - enabling direct integration into 3.3 V system domains without voltage translation or regulation overhead.
What debug interface does the MC9S08JS8CWJ support?
The MC9S08JS8CWJ supports single-wire background debug (BKGD) via PTB2, compatible with standard NXP Cyclone and PEMicro debug probes. This interface enables non-intrusive flash programming, real-time register/memory inspection, and breakpoint debugging without requiring additional pins or JTAG headers - streamlining development and reducing test-point count on production PCBs.
MC9S08JS8CWJ 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:
- 48MHz
- Connectivity:
- LINbus, SCI, SPI, USB
- Peripherals:
- LVD, POR, PWM
- Number of I/O:
- 14
- Program Memory Size:
- 8KB (8K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 512 x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MC9S08JS8CWJ FAQ
1.How can I place an order for MC9S08JS8CWJ through Aetrix?
Please submit a Request for Quotation (RFQ) for MC9S08JS8CWJ 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 MC9S08JS8CWJ reliable?
The price and inventory of MC9S08JS8CWJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC9S08JS8CWJ is usually 5 days.
3.What payment methods are accepted for MC9S08JS8CWJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC9S08JS8CWJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC9S08JS8CWJ?
MC9S08JS8CWJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC9S08JS8CWJ 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 MC9S08JS8CWJ?
For technical support, including MC9S08JS8CWJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC9S08JS8CWJ requirements.
6.How does Aetrix verify that MC9S08JS8CWJ is sourced from the original manufacturer or authorized distributors?
All MC9S08JS8CWJ 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 MC9S08JS8CWJ meets industry standards.
7.What is the process for return or replacement of MC9S08JS8CWJ?
All MC9S08JS8CWJ units undergo pre-shipment inspection (PSI). If there is an issue with MC9S08JS8CWJ, 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 MC9S08JS8CWJ part is unused and in its original packaging.
Return procedure for MC9S08JS8CWJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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