NXP Semiconductors MC9S08SH8CWJ

Overview

MC9S08SH8CWJ from Freescale Semiconductor is an 8-bit HCS08 microcontroller with 8 KB Flash, 512 B RAM, and integrated peripherals including 10-bit ADC, dual TPM timers, SCI, SPI, I²C, RTC, and analog comparator. It operates at up to 40 MHz CPU frequency, supports multiple low-power stop/wait modes, and features single-wire background debug. It targets cost-sensitive embedded control in automotive body electronics and industrial sensors.

For engineers reviewing the MC9S08SH8CWJ datasheet, MC9S08SH8CWJ pinout, MC9S08SH8CWJ application, or MC9S08SH8CWJ equivalent, key selection criteria include its 24-QFN package, internal clock source (ICS) with FLL for 2–20 MHz bus operation, 17 GPIOs with configurable drive strength and hysteresis, and support for LIN-compliant SCI wake-up and extended break handling.

Technical Context

The MC9S08SH8CWJ implements the HCS08 CPU core with HC08 instruction set extension (including BGND), supporting up to 32 interrupt/reset sources and a 40-MHz maximum core frequency. Its internal clock source (ICS) integrates a frequency-locked loop (FLL) with precision-trimmed internal reference (±2% over voltage/temperature) and selectable external crystal input (31.25 kHz–16 MHz).

Peripherals include a 12-channel 10-bit ADC with 2.5 µs conversion time and temperature sensor, two 2-channel TPM modules supporting PWM, input capture, and output compare, and a real-time counter (RTC) with free-running 1-kHz low-power oscillator enabling cyclic wake-up in all power modes-including Stop3.

Key Specifications

Pinout & Package

MC9S08SH8CWJ is housed in a 24-pin QFN package (case outline 98ASA00474D), 4 mm × 4 mm body, 0.5 mm pitch, with exposed thermal pad. The package uses copper wire bonding per Freescale QFN migration addendum (Rev. 0, 07/2014).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit microcontroller applications.

Compared with MC9S08AC16 and S9S08SG8E2, the MC9S08SH8CWJ offers optimal balance of compact 24-QFN footprint, sufficient 8 KB Flash for LIN-node firmware, and proven qualification for cost-sensitive industrial and body-electronics applications-without over-provisioning memory or package size.

Availability

MC9S08SH8CWJ is available at Aetrix Electronics and suitable for automotive door modules, industrial temperature sensor nodes, smart appliance control boards, and medical diagnostic handhelds requiring stable component supply across long-lifecycle production programs.

Supply support for MC9S08SH8CWJ 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

Freescale Semiconductor (now part of NXP Semiconductors) is a fabless semiconductor company specializing in microcontrollers, analog, and connectivity solutions for automotive, industrial, and consumer markets.

The MC9S08SH8CWJ belongs to the HCS08 MCU family, designed specifically for cost-optimized, low-power embedded control in automotive body electronics and industrial sensor interfaces where small footprint and LIN/SCI integration are critical.

FAQ

What is the package type and thermal pad configuration of the MC9S08SH8CWJ?

The MC9S08SH8CWJ uses a 24-pin QFN package (case outline 98ASA00474D), measuring 4 mm × 4 mm with 0.5 mm pitch and an exposed thermal pad. Per Freescale's QFN migration addendum (Rev. 0, 07/2014), it employs copper wire bonding. The exposed pad must be soldered to a thermal land on the PCB for reliable thermal dissipation and electrical grounding.

Does the MC9S08SH8CWJ support LIN communication natively?

Yes, the MC9S08SH8CWJ supports LIN 2.x communication through its SCI module, which provides hardware-assisted master extended break generation and slave extended break detection. This eliminates software timing loops for break field generation and improves protocol robustness-making the MC9S08SH8CWJ suitable for LIN slave nodes in automotive body networks without external transceivers.

What low-power modes does the MC9S08SH8CWJ support, and which peripherals remain active in Stop3 mode?

The MC9S08SH8CWJ supports Run, Wait, Stop2, and Stop3 modes. In Stop3 mode, the RTC, analog comparator (ACMP), and ADC remain fully operational while CPU and most clocks halt. This allows event-driven wake-up (e.g., comparator threshold breach or RTC alarm) with typical current draw below 1 µA-ideal for battery-powered sensor applications requiring long standby life.

Can the MC9S08SH8CWJ operate without an external crystal?

Yes, the MC9S08SH8CWJ can operate without an external crystal by using its internal clock source (ICS) with frequency-locked loop (FLL). The ICS provides a stable bus clock from 2 MHz to 20 MHz using the trimmed internal reference oscillator, achieving ±2% accuracy over temperature and voltage-sufficient for LIN, UART, and PWM timing in most non-precision applications.

Is the MC9S08SH8CWJ pin-compatible with any NXP-rebranded successors?

Yes, the S9S08SG8E2 is a direct NXP-branded successor to the MC9S08SH8CWJ with identical pinout, memory map, register layout, and peripheral functionality. It maintains full hardware and software compatibility while adding enhanced ESD immunity (4 kV HBM) and updated AEC-Q100 Rev. G qualification-making it a validated drop-in alternative for new designs.