NXP Semiconductors MC9S08JS16CWJ

Overview

MC9S08JS16CWJ from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller with 16 KB flash, 512 B 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 integrated MCG clock generator, TPM timer/PWM, SCI, SPI, RTC, and CRC engine. It targets embedded USB peripheral control in industrial sensors and automotive body electronics.

For engineers reviewing the MC9S08JS16CWJ datasheet, MC9S08JS16CWJ pinout, MC9S08JS16CWJ application, or MC9S08JS16CWJ equivalent, key selection criteria include USB transceiver integration, 24-QFN thermal performance (θJA = 92°C/W on 1s board), low-power stop modes (as low as 1.36 μA), and verified 3.3 V USB regulator compliance per Section 3.12 of Rev. 4 datasheet.

Technical Context

The MC9S08JS16CWJ implements the HCS08 CPU core with 48 MHz maximum operation and 24 MHz internal bus frequency. Its Multi-Purpose Clock Generator (MCG) supports FLL and PLL modes, enabling flexible clock sourcing from crystal (32 kHz–16 MHz), resonator, or external clock - with trimmable internal reference (31.25–39.0625 kHz).

USB functionality includes a dedicated on-chip 3.3 V regulator (VUSB33), full-speed transceiver (12 Mbps), endpoint 0 plus six configurable endpoints, and hardware CRC16-CCITT support. Peripheral set includes one 2-channel 16-bit TPM, one SCI with LIN break generation/detection, one SPI with hardware match, and real-time counter with binary/decimal prescaler.

Key Specifications

Pinout & Package

MC9S08JS16CWJ uses a 24-pin quad flat no-lead (QFN) package (Case 1982-01, 4×4 mm body, 0.5 mm pitch) with exposed thermal pad. The copper-wire interconnect version (document number 98ASA00734D) replaces legacy gold-wire variants for improved reliability and cost.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with MC9S08AC16CFGE and S9KEAZ128AMLH, the MC9S08JS16CWJ delivers optimal integration for cost-sensitive USB peripheral designs where compact 24-QFN footprint, self-contained USB PHY, and sub-2 μA stop current are critical - without requiring architectural migration or external USB components.

Availability

MC9S08JS16CWJ is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body electronics, USB HID devices, and programmable I/O modules requiring stable component supply and long-term manufacturability.

Supply support for MC9S08JS16CWJ 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 acquired Freescale in 2015 and maintains full support for the HCS08 portfolio, delivering high-reliability microcontrollers for industrial, automotive, and consumer applications.

The MC9S08JS16CWJ belongs to the HCS08 JS-series, designed specifically for USB-enabled embedded control applications requiring low power, small footprint, and integrated analog/digital peripherals - targeting cost-sensitive endpoints in factory automation and vehicle subsystems.

FAQ

What is the maximum operating frequency of the MC9S08JS16CWJ CPU core?

The MC9S08JS16CWJ CPU core runs at a maximum frequency of 48 MHz, with a corresponding 24 MHz internal bus frequency. This timing is achieved using the MCG's PLL mode with an external crystal or resonator input, and is fully characterized across the –40°C to +85°C temperature range per Section 3.8 of the Rev. 4 datasheet. The MC9S08JS16CWJ achieves deterministic real-time response suitable for USB transaction handling and motor control loops.

Does the MC9S08JS16CWJ include an integrated USB transceiver?

Yes, the MC9S08JS16CWJ integrates a full-speed USB 2.0 transceiver compliant with USB specification 2.0 at 12 Mbps. It includes dedicated USBDP and USBDN pins, on-chip 3.3 V regulator (VUSB33), and hardware endpoint management supporting endpoint 0 plus up to six additional endpoints. Electrical characteristics are specified in Section 3.12 of the Rev. 4 datasheet, confirming compliance with USB voltage and timing requirements.

What power-saving modes does the MC9S08JS16CWJ support, and what is the lowest current draw?

The MC9S08JS16CWJ supports Wait mode plus two Stop modes (Stop2 and Stop3). In Stop3 mode with all modules disabled, typical current consumption is 1.50 μA at 5 V and 1.31 μA at 3 V (Section 3.6, Table 7). With RTC enabled, adder current is only 300 nA. These ultra-low currents enable multi-year battery operation in portable USB peripherals and remote sensors - confirmed by characterization data across temperature and voltage.

Is the MC9S08JS16CWJ pin-compatible with other members of the JS-series?

The MC9S08JS16CWJ shares the same 24-pin QFN package (Case 1982-01) and identical pin assignments with MC9S08JS8 and MC9S08JS16L, making it pin-compatible within the JS-series QFN variants. However, memory size (8 KB vs. 16 KB flash) and feature sets (e.g., USB enablement) differ - so firmware and BOM must be validated per part number. Pin compatibility is documented in Table 1 and Figures 2–3 of the Rev. 4 datasheet.

What clock sources are supported by the MC9S08JS16CWJ's MCG module?

The MC9S08JS16CWJ MCG supports crystal/resonator (32 kHz–16 MHz), external square-wave clock (31.25 kHz–40 MHz), and internal trimmed/untrimmed reference (31.25–39.0625 kHz). It operates in FEI, FEE, FBE, PBE, PEE, BLPE, and BLPI modes, with PLL lock time ≤1 ms and FLL acquisition ≤1 ms. All clock configurations are electrically characterized per Tables 8 and 9 in the Rev. 4 datasheet.