MC9S08JS16LCFK - 8-bit USB MCU 16KB Flash 48MHz | NXP
MPN: MC9S08JS16LCFK ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.34 | $3.34 |
| 10 | $3.18 | $31.80 |
| 100 | $2.95 | $295.00 |
| 500 | $2.8 | $1,400.00 |
| 1,000 | $2.65 | $2,650.00 |
MC9S08JS16LCFK Overview
An 8-bit microcontroller is a self-contained computing IC that integrates a processor core, program memory, data memory, and peripherals on a single chip. The S08 (HCS08) family sits within NXP's broader Freescale MCU hierarchy: HCS08 -> 8-bit microcontroller -> embedded processor -> semiconductor. 8-bit MCUs dominate cost-sensitive embedded control tasks such as USB peripherals, appliance control, and simple human-interface devices.
The defining feature of the JS16 family is its full-speed USB 2.0 device controller with an on-chip USB transceiver, eliminating external transceiver components and reducing bill-of-materials cost. Supporting peripherals include LVD (low-voltage detect), POR (power-on reset), and PWM modules, with connectivity via LINbus, SCI, and SPI in addition to USB. An internal oscillator option removes the need for an external crystal in many designs.
The HCS08 CPU executes at up to 48MHz with a 24MHz internal bus, delivering efficient interrupt-driven operation for USB endpoint servicing. The 16KB Flash accommodates USB stack firmware alongside application code, while 512 bytes of RAM handle endpoint buffers and application variables. The 24-VQFN exposed-pad package provides compact 5x5 mm footprint suitable for space-limited PC peripheral boards.
Typical applications include affordable PC peripherals such as HID devices, USB dongles, sensor bridges, and game controllers - applications the NXP product page explicitly targets. The integrated USB transceiver makes it a strong fit for compact, low-cost USB-to-UART or USB-to-SPI bridges.
Designers should budget RAM carefully: with only 512 bytes, USB endpoint buffering and application data must be allocated conservatively. Enabling the internal oscillator saves a crystal but verify USB timing tolerance in your design.
This page synthesizes distributor pricing, verified specifications from the NXP MC9S08JS16 datasheet, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for MC9S08JS16LCFK — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MC9S08JS16LCFK (same form factor and footprint) — differing in Connectivity, Core Processor, Program Memory Size, RAM Size.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC9S08JS8LCFK
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.41 / Unit
View Datasheet →MC9S08DV48ACLF
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.85 / Unit
View Datasheet →MC9S08JS16LCFK Maximum Ratings & Electrical Characteristics
| Core Processor | S08 (HCS08) |
| Core Size | 8-Bit |
| CPU Speed | 48 MHz |
| Internal Bus Speed | 24 MHz |
| Program Memory Size | 16KB (16K x 8) |
| Program Memory Type | FLASH |
| RAM Size | 512 x 8 |
| Number of I/O | 14 |
| Connectivity | LINbus, SCI, SPI, USB |
| USB Controller | USB 2.0 full-speed device with integrated transceiver |
| Peripherals | LVD, POR, PWM |
| Oscillator Type | Internal |
| Package / Case | 24-VQFN Exposed Pad (5x5 mm) |
| Mounting Type | Surface Mount |
| Packaging | Tray |
| Part Status | Active |
MC9S08JS16LCFK 24-vqfn exposed pad (5x5 mm) Pin Configuration Guide
Pin configuration for MC9S08JS16LCFK (24-vqfn exposed pad (5x5 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for MC9S08JS16LCFK.
Refer to the datasheet for full pin configuration.
Typical Applications
MC9S08JS16LCFK is suitable for 6 applications: USB HID PC Peripherals, USB-to-UART / USB-to-SPI Bridges, USB Sensor Dongles and Data Loggers, Game Controllers and Gaming Accessories, Industrial USB Configuration Ports, Consumer Appliance USB Interfaces.
USB HID PC Peripherals
The MC9S08JS16LCFK was designed for affordable PC peripherals, per NXP's own product positioning. Its full-speed USB 2.0 device controller with integrated transceiver supports the 12 Mbps bus speed required by HID class devices, while removing the external transceiver that would otherwise add cost and board area. The 16KB Flash stores the HID stack plus button/LED handling logic, and 512 bytes of RAM accommodate endpoint buffers for typical mouse, keyboard, and joystick reports. In this application the MCU enumerates as an HID device, services endpoint 0 for control transfers, and pushes interrupt-in reports on button or encoder events. The internal oscillator can clock the part in cost-sensitive designs, though designers should verify USB timing accuracy against the datasheet specification. Overall, the JS16 delivers a complete USB peripheral node in a 5x5 mm QFN footprint.
Recommended
USB-to-UART / USB-to-SPI Bridges
With SCI (serial) and SPI modules integrated alongside the USB 2.0 device controller, the MC9S08JS16LCFK functions as a low-cost USB-to-UART or USB-to-SPI protocol bridge. Firmware shuttles bytes between USB bulk endpoints and the SCI/SPI peripheral; at a 48MHz core and 24MHz bus, the device sustains full-speed USB traffic rates typical of configuration and sensor-streaming links. The 14 GPIO lines provide chip-select, handshaking, and status signals for the bridged side. The key design constraint is the 512-byte RAM budget, which must hold both USB endpoint buffers and serial transaction buffers, so deep-FIFO streaming designs should move to a larger-memory sibling. For moderate-rate bridges connecting sensors, flash memories, or legacy serial devices to a PC, the JS16 provides a single-chip solution without an external transceiver or dedicated bridge IC.
Recommended
USB Sensor Dongles and Data Loggers
Compact USB dongles that sample analog or digital sensors and stream data to a host are a natural fit for the MC9S08JS16LCFK. The integrated USB transceiver means the entire product can fit around a 5x5 mm QFN plus a USB connector, enabling small form-factor stick designs. Sensor interfaces connect via the 14 GPIO, SPI, or SCI pins, while LVD and POR peripherals guarantee clean startup from the USB 5V supply with proper brown-out behavior. The PWM module can drive indicator LEDs or simple actuator control alongside data acquisition. The 16KB Flash holds the vendor-specific USB class firmware and sensor drivers, and the internal oscillator option removes the crystal, further shrinking the board. Data throughput is bounded by full-speed USB (12 Mbps) and the 512-byte RAM buffering window.
Recommended
Game Controllers and Gaming Accessories
USB game controllers - joysticks, gamepads, and racing peripherals - require reliable HID endpoint servicing, multiple ADC/GPIO inputs, and a low bill-of-materials cost, all of which the MC9S08JS16LCFK provides. The 48MHz HCS08 core handles debouncing, joystick scaling, and force-feedback command decoding while maintaining HID interrupt-in timing on the 12 Mbps bus. Its integrated USB transceiver keeps the controller PCB compact enough for handheld enclosures, and the 24-VQFN exposed pad grounds well to multilayer boards handling ESD events at the USB connector. The 16KB Flash leaves room for device-specific descriptors, calibration tables, and firmware update code. NXP positions the JS16 family squarely at this affordable-peripheral segment and supplies USB stack software to accelerate controller certification cycles.
Recommended
Industrial USB Configuration Ports
Industrial equipment increasingly needs a USB service port for configuration, diagnostics, and firmware field updates, and the MC9S08JS16LCFK serves as a dedicated USB front-end for this role. The MCU bridges USB CDC or vendor-class endpoints to the host system's SCI/SPI buses, letting technicians reconfigure parameters using a laptop without opening the enclosure. LVD (low-voltage detect) and POR (power-on reset) peripherals ensure the USB interface resets deterministically when equipment power cycles, an important reliability consideration in factory environments. The LINbus connectivity also suits vehicle-mounted and industrial bus service tools. Because the USB transceiver is integrated, the service port adds only the MCU and connector to the system cost. The 16KB Flash accommodates the USB stack, command parser, and update loader with margin.
Recommended
Consumer Appliance USB Interfaces
Small appliances - coffee machines, massagers, personal-care devices - increasingly offer USB ports for charging feedback, mode selection, or companion-app configuration. The MC9S08JS16LCFK provides the USB device connectivity these products need at consumer price points, with the integrated transceiver eliminating the discrete USB PHY cost line. Its PWM peripheral drives status LEDs, heaters, or haptic feedback elements, while 14 GPIO handle touch buttons and encoders. The internal oscillator supports cost-optimized boards; where USB compliance matters, a crystal-derived clock should be evaluated against datasheet tolerances. The compact 24-VQFN (5x5 mm) package fits space-constrained handheld housings. With 16KB Flash, manufacturers can include USB HID control interfaces plus appliance state machines, and the 512-byte RAM suffices for simple device-class endpoint buffering.
Recommended
Recommended Products Summary
Engineering reference data for MC9S08JS16LCFK — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S08JS8LCFK | MC9S08DV48ACLF |
|---|---|---|---|
| Package | 24-VQFN Exposed Pad (5x5 mm) | 24-VQFN Exposed Pad (5x5 mm) - same | 24-VQFN Exposed Pad (5x5 mm) - same footprint, verify pin map |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core | S08 8-bit, 48 MHz | S08 8-bit, 48 MHz | S08 8-bit, 48 MHz |
| Flash Memory | 16KB (16K x 8) | 8KB (8K x 8) | 48KB |
| RAM | 512 x 8 | 512 x 8 | 2 KB |
| USB Controller | USB 2.0 full-speed device, integrated transceiver | USB 2.0 full-speed device, integrated transceiver | No USB (CAN instead) |
| Connectivity | LINbus, SCI, SPI, USB | LINbus, SCI, SPI, USB | LINbus, SCI, SPI, CAN |
Key Differentiators
- Integrated full-speed USB 2.0 transceiver (vs MC9S08DV48ACLF)
- More Flash headroom within the JS family (vs MC9S08JS8LCFK)
- Compact single-chip USB node (vs MC9S08DV48ACLF)
Design Notes
Route the USB D+ and D- pins as a tightly coupled differential pair with approximately 90-ohm differential impedance. Keep the traces as short as possible - ideally under 25 mm - and match their lengths within a few mils. Since the transceiver is integrated on-chip, do not add series resistors that assume an external PHY; follow the reference circuit in the NXP MC9S08JS16 datasheet. Connect the exposed pad of the 24-VQFN to a solid ground pour with an array of vias to reduce ground bounce during USB signaling.
The 512-byte RAM is the most common source of firmware failures on this device. USB endpoint buffers, stack usage, and application variables all share this space; allocate endpoint buffer descriptors conservatively and test with maximum-size reports. Also note there is no EEPROM: data needing persistence must be written to Flash using the emulated-EEPROM routines from NXP, which must respect the Flash erase/program voltage and timing specifications in the datasheet. Budget Flash carefully - the USB stack consumes a significant fraction of 16KB.
The JS16 is powered from the USB bus 5V rail in typical applications, so include a local 3.3V regulator (per the datasheet supply specification) with 100 nF decoupling at each VDD pin placed within 2 mm of the device. Use the LVD (low-voltage detect) peripheral to hold reset until supply rails are stable, preventing corrupted USB enumeration after hot-plug events. Estimated: a linear regulator dropping 5V to 3.3V at ~20 mA MCU load dissipates roughly 34 mW, which is negligible thermally in the QFN package.
Compliance Information
Compliance details were not stated in the verified web data retrieved for this page. Confirm RoHS/REACH/lead-free status on the official NXP product page or distributor certificate of conformance.
