MC9S08JS16CWJ - 8-bit S08 USB MCU, 16KB Flash, 48MHz | NXP
MPN： MC9S08JS16CWJ ✗ 停產MC9S08JS16CWJ 概覽
What is an S08 8-bit microcontroller? The S08 is NXP's (formerly Freescale) 8-bit CISC microcontroller family built around the HCS08 CPU core, which succeeds the legacy HC08 family with an enhanced instruction set, hardware multiply/divide in the accumulator, and a richer peripheral integration strategy. An 8-bit MCU like the MC9S08JS16CWJ is typically chosen when the application requires simple deterministic firmware, USB connectivity, low cost, and easy development with CodeWarrior or the newer Eclipse-based S08 toolchains, rather than the raw processing throughput of a 32-bit Cortex-M device.
Key features that differentiate this part include the integrated USB 2.0 full-speed (12 Mbps) device controller with an on-chip transceiver that eliminates external USB PHY components, 16 KB of flash with 512 bytes of RAM, multiple serial interfaces (SCI, SPI), and a hardware LIN bus capability for automotive sub-bus applications. The part operates from a single 3.0 V or 5.0 V supply rail and supports background debugging via the standard BDM interface. The on-chip regulator and low-power run/wait/stop modes suit battery-powered USB peripherals such as HID input devices and low-data-rate industrial sensors.
The MC9S08JS16CWJ combines a 48 MHz CPU, 24 MHz bus, hardware multiply, and integrated USB into a compact 20-pin SOIC footprint, simplifying BOM and PCB area versus an external MCU + ULPI/UTMI PHY architecture. The on-chip pull-up on the D+ line and integrated 3.3 V USB regulator are particularly valuable for cost-sensitive USB peripheral designs.
Typical applications include USB HID input devices (keyboards, mice, custom HID peripherals), USB-to-UART bridge dongles, low-cost industrial sensor interfaces that expose a USB CDC or vendor-class endpoint, and LIN-to-USB or RS-232-to-USB protocol-converter dongles. The wide operating voltage and integrated transceiver make it a strong fit for any USB peripheral that must interface with a PC host.
When designing with this part, ensure that the USB D+ pull-up (1.5 kohm to 3.3 V) is enabled in firmware after bus attach is desired, and add ESD protection (such as a USBLC6-2SC6 array) on D+/D- lines for production robustness. Decouple VDD and the USB voltage-domain pins with 100 nF and 4.7 uF ceramic capacitors placed within a few millimetres of the IC pins, and follow standard USB 2.0 differential-pair impedance (90 ohm differential) for the D+/D- traces.
This page synthesizes distributor pricing, drop-in alternatives from the JS8/JS16 family and cross-brand pin-compatible USB MCUs, and practical design notes not found in the manufacturer datasheet. Pricing is referenced as of 2026-10-10 from DigiKey and Mouser.
直接替換替代品，適用於 MC9S08JS16CWJ — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： MC9S08JS16CWJ （相同外形與佔位） — 差異在於 Package, RAM, Core, Operating Temperature, Program Memory.
MC9S08JS8CWJ
✅ 直接替換聯絡詢價
查看資料表 →MC9S08JS16CFK
✅ 直接替換📋 參考替代品（不在目錄中）
MC9S08JS16LCWJ
✅ 直接替換📋 參考替代品（不在目錄中）
MC9S08SH8CWJR
✅ 直接替換📋 參考替代品（不在目錄中）
PIC16F1455-I/SL
✅ 直接替換聯絡詢價
查看資料表 →MC9S08JS16CWJ 最大額定值與電氣特性
| Core | HCS08 (S08 CISC 8-bit) |
| Maximum CPU Frequency | 48 MHz |
| Internal Bus Frequency | 24 MHz |
| Program Flash | 16 KB (16K x 8) |
| RAM | 512 bytes |
| 資料匯流排寬度 | 8 bit |
| USB Controller | USB 2.0 Full-Speed Device with on-chip transceiver |
| 供應電壓 | 2.7 V to 5.5 V (single supply) |
| 工作溫度 | -40C to +85C |
| 封裝 | 20-pin SOIC W (wide body) |
| 安裝類型 | Surface Mount |
| Connectivity | USB, SCI, SPI, LINbus |
| Debug Interface | Background Debug Mode (BDM) |
| RoHS 狀態 | Compliant (per NXP product page) |
MC9S08JS16CWJ 腳位配置
| 腳位 1 | PTB5/KBIP5 — General-purpose I/O / keyboard interrupt |
| 腳位 2 | PTB4/KBIP4 — General-purpose I/O / keyboard interrupt |
| 腳位 3 | PTB3/KBIP3/AD3 — GPIO / keyboard interrupt / ADC channel |
| 腳位 4 | VSS — Ground |
| 腳位 5 | VDD — Supply voltage (2.7 V to 5.5 V) |
| 腳位 6 | PTA5/IRQ/TCLK — GPIO / IRQ input / timer clock |
| 腳位 7 | PTA4/RESET_b — Reset input (active low) / GPIO |
| 腳位 8 | PTB2/KBIP2/AD2 — GPIO / keyboard interrupt / ADC channel |
| 腳位 9 | PTB1/KBIP1/AD1 — GPIO / keyboard interrupt / ADC channel |
| 腳位 10 | PTB0/KBIP0/AD0 — GPIO / keyboard interrupt / ADC channel |
| 腳位 11 | PTA3/SPSCK — GPIO / SPI clock |
| 腳位 12 | PTA2/MOSI — GPIO / SPI master out slave in |
| 腳位 13 | PTA1/MISO — GPIO / SPI master in slave out |
| 腳位 14 | PTA0/TXD — GPIO / SCI transmit |
| 腳位 15 | USB_VDD — USB transceiver supply (3.3 V regulated) |
| 腳位 16 | USB_VSS — USB transceiver ground |
| 腳位 17 | USB_D- — USB D- data line |
| 腳位 18 | USB_D+ — USB D+ data line (1.5 kohm pull-up) |
| 腳位 19 | RXD/PTA6 — SCI receive / GPIO |
| 腳位 20 | BKGD/MS — Background Debug Mode / mode select |
典型應用
MC9S08JS16CWJ 適用於 7 應用s: USB HID Input Devices, USB-to-UART Bridge Dongle, Industrial USB Sensor Interface, USB Human Interface / Custom HID Peripherals, USB Firmware Update Bootloader Host, USB-Powered Data Acquisition Module, LIN-to-USB Protocol Converter.
USB HID Input Devices
The MC9S08JS16CWJ is well suited to USB HID class peripherals such as keyboards, mice, game controllers, and custom multi-interface HID devices. Its integrated USB 2.0 full-speed controller plus on-chip transceiver remove the need for an external PHY, while 16 KB of flash comfortably fits HID report descriptors and small application firmware. At 48 MHz CPU / 24 MHz bus, the part handles USB polling and report composition with margin. Typical design: route D+/D- through a USBLC6-2SC6 ESD array to the USB connector, place 100 n+4.7 uF decoupling on VDD within 3 mm of the pins, and program the internal 1.5 kohm D+ pull-up only after the host presents VBUS.
推薦
USB-to-UART Bridge Dongle
The MC9S08JS16CWJ's USB device controller plus on-chip SCI makes it a natural fit for low-cost USB-to-RS232 / USB-to-UART bridge dongles using the USB CDC ACM class. The 16 KB flash holds USB descriptors plus a small command interpreter, while the SCI drives the external logic-level UART. Typical throughput targets 115200 to 921600 bps full-duplex. Use the internal 3.3 V regulator to power external level shifters; add a 12 MHz crystal reference if your design needs precise baud generation rather than the internal FLL.
推薦
Industrial USB Sensor Interface
For low-data-rate industrial sensors that need to expose readings over USB, the MC9S08JS16CWJ delivers vendor-class USB endpoints with deterministic 8-bit timing suited to periodic ADC sampling. The part's 2.7 V to 5.5 V supply range lets it sit directly on a 3.3 V or 5 V industrial rail without an extra regulator, and the -40C to +85C temperature grade covers most factory-floor environments. Pair with an external 12- or 16-bit ADC over SPI when more than the internal ADC channels are needed.
推薦
USB Human Interface / Custom HID Peripherals
Custom HID-class designs (foot pedals, control surfaces, configurable keypads) benefit from the MC9S08JS16CWJ's low BOM count and flexible GPIO mapped to the SOIC-20 pinout. The on-chip USB transceiver plus internal pull-up eliminates external PHY and pull-up components, keeping the design under $1.50 in passive cost on a 4-layer board. Report descriptors fit comfortably in 16 KB flash, and the S08 core's deterministic interrupt latency helps with strict HID polling budgets.
推薦
USB Firmware Update Bootloader Host
The MC9S08JS16CWJ's 16 KB flash can be split between a USB DFU-style bootloader and application firmware, enabling field-upgradable USB peripherals. The on-chip USB device controller handles the DFU class protocol while the SCI/SPI peripherals can act as a passthrough update channel for downstream devices. Use the BDM interface for initial programming and the USB DFU path for production firmware updates; protect the bootloader area by writing the flash security bytes per NXP datasheet.
推薦
USB-Powered Data Acquisition Module
Bus-powered data acquisition dongles can use the MC9S08JS16CWJ as both the USB interface and the acquisition controller, streaming ADC samples over USB isochronous or bulk endpoints. The on-chip 3.3 V regulator derives the analog supply from USB VBUS, simplifying the BOM. With 16 KB flash and 512 bytes of RAM, the firmware should focus on a small ring buffer plus USB descriptor handling; offload heavy DSP to the host PC. Decouple AVCC/AVSS with 100 n+10 uF ceramics for low-noise ADC measurements.
推薦
LIN-to-USB Protocol Converter
The MC9S08JS16CWJ supports the LIN bus through its SCI peripheral, making it usable as a LIN-to-USB bridge for automotive diagnostics tools and bench programmers. Combine the on-chip SCI (LIN-capable) with the USB device controller to expose LIN frames over a CDC or vendor-class USB endpoint. The -40C to +85C industrial temperature range covers most under-hood and cabin environments, but for full automotive grade consider the AEC-Q100 qualified S08JS variants when available.
推薦
推薦產品摘要
工程參考資料，適用於 MC9S08JS16CWJ — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | MC9S08JS8CWJ | MC9S08JS16CFK | MC9S08JS16LCWJ | MC9S08SH8CWJR | PIC16F1455-I/SL |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | Microchip Technology |
| Package | 20-SOIC W | 20-SOIC W | 20-SOIC W | 20-SOIC W | 20-SOIC W | 20-SOIC W |
| Program Flash | 16 KB | 8 KB | 16 KB | 16 KB | 8 KB | 14 KB |
| RAM | 512 bytes | 512 bytes | 512 bytes | 512 bytes | 512 bytes | 1024 bytes |
| Core | HCS08 (S08) 8-bit | HCS08 (S08) 8-bit | HCS08 (S08) 8-bit | HCS08 (S08) 8-bit | HCS08 (SH) 8-bit | PIC16 8-bit |
| Maximum CPU Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 40 MHz | 48 MHz |
| USB Controller | USB 2.0 FS Device + on-chip transceiver | USB 2.0 FS Device + on-chip transceiver | USB 2.0 FS Device + on-chip transceiver | USB 2.0 FS Device + on-chip transceiver | No USB | USB 2.0 FS Device + on-chip transceiver |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.3 V to 5.5 V |
主要差異化特點
- Integrated USB 2.0 full-speed controller with on-chip transceiver (對比MC9S08SH8CWJR)
- Doubles flash versus the JS8 sibling while staying pin-compatible (對比MC9S08JS8CWJ)
- Mature S08/CodeWarrior toolchain and BDM debug interface (對比PIC16F1455-I/SL)
設計說明
Place a 100 nF X7R ceramic decoupling capacitor within 3 mm of the VDD pin and a 4.7 uF X5R bulk capacitor on the same node. For the USB_VDD pin, add a separate 100 nF + 4.7 uF pair. Per the NXP datasheet, USB_VDD must be connected to the internal 3.3 V regulator output; do not drive it from an external supply unless the regulator is disabled via the configuration word.
Route the USB D+ and D- traces as a 90 ohm differential pair with continuous reference ground on the layer beneath. Keep the pair length matched within 150 mil and avoid stubs. Place the USBLC6-2SC6 (or equivalent) ESD protection array within 5 mm of the USB connector, and place ferrite beads on VBUS if the design is bus-powered to suppress EMI from the host. Per USB 2.0 spec, the D+ pull-up is 1.5 kohm to 3.3 V.
Enable the internal 1.5 kohm D+ pull-up in firmware only after USB VBUS is detected and the host has signalled attach; pulling D+ high at power-up can violate USB 2.0 section 7.1.5 (device attach signalling). Also ensure the flash security bytes are programmed after final firmware load, otherwise BDM access remains enabled and field firmware can be extracted - a common pitfall when shipping USB peripherals.
合規資訊
RoHS and lead-free per NXP product page and DigiKey listing as of 2026-10-10. AEC-Q100 not applicable for this industrial-grade SOIC part; consult NXP for AEC-Q100 automotive variants in the JS family. Halogen-free status not stated on the verified web pages.
