NXP Semiconductors MC9S08SH4CWJ

Overview

MC9S08SH4CWJ from Freescale Semiconductor is an 8-bit HCS08 microcontroller featuring a 40-MHz CPU, 4 KB flash memory, and integrated peripherals including 10-bit ADC, analog comparator, SCI, SPI, I²C, TPM PWM timers, and RTC. It operates across -40°C to 105°C with internal clock source (ICS) supporting 2–20 MHz bus frequencies and runs in low-power stop3 mode with real-time interrupt wake-up. Used in industrial sensor nodes and automotive body electronics.

For engineers reviewing the MC9S08SH4CWJ datasheet, MC9S08SH4CWJ pinout, MC9S08SH4CWJ application, or MC9S08SH4CWJ equivalent, key selection criteria include its 24-QFN package, single-wire background debug interface, FLASH block protection, internal bandgap reference for ADC/ACMP, and support for LIN-compliant SCI wake-up and break generation.

Technical Context

The MC9S08SH4CWJ implements the HCS08 CPU core with HC08 instruction set plus BGND, supporting up to 32 interrupt/reset sources and on-chip ICE debug module with two comparators and eight-deep FIFO. Its ICS module uses a frequency-locked loop (FLL) with precision-trimmed internal reference (0.2% resolution, ±2% deviation over voltage/temperature).

Peripherals include a 12-channel 10-bit ADC with 2.5 µs conversion time and temperature sensor, dual 2-channel TPM modules supporting edge- or center-aligned PWM, and SCI with LIN master break generation and slave break detection - all functional in stop3 mode alongside RTC powered by 1-kHz internal oscillator.

Key Specifications

Pinout & Package

MC9S08SH4CWJ is housed in a 24-pin QFN package (case outline 98ASA00474D), 4 mm × 4 mm body, 0.5 mm pitch, with exposed thermal pad for enhanced thermal performance. Pin functions align with MC9S08SH8 family pin compatibility per datasheet Rev. 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08SH4CWJ, MC9S08SH8CWJ offers direct memory scalability within identical hardware constraints, while S9KEAZN32AMFK represents a next-generation architecture shift - making the former ideal for incremental upgrades and the latter suited for greenfield high-performance applications.

Availability

MC9S08SH4CWJ is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, smart appliance interfaces, and portable medical diagnostics requiring stable component supply and long-term manufacturability.

Supply support for MC9S08SH4CWJ 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 global semiconductor company specializing in embedded processing, connectivity, and analog solutions for automotive, industrial, and consumer markets.

The MC9S08SH4CWJ belongs to the HCS08 microcontroller family, designed for cost-sensitive, low-power embedded applications requiring robust peripheral integration, debug flexibility, and automotive-grade reliability.

FAQ

What is the maximum operating frequency of the MC9S08SH4CWJ CPU core?

The MC9S08SH4CWJ features an HCS08 8-bit CPU core rated for up to 40 MHz operation. This maximum frequency is achievable when the internal clock source (ICS) is configured to deliver a 20 MHz bus clock with a 2× prescaler for core operation, or with external crystal input meeting timing specifications. The MC9S08SH4CWJ datasheet specifies this rating under 2.7–5.5 V supply and -40°C to +105°C ambient conditions.

Does the MC9S08SH4CWJ support in-circuit debugging, and what interface is used?

Yes, the MC9S08SH4CWJ supports in-circuit debugging via a single-wire background debug interface using the BKGD/MS pin. This interface enables breakpoint setting, memory inspection, register read/write, and real-time execution control without halting system clocks. The on-chip debug module includes two comparators and nine trigger modes, with an eight-deep FIFO for change-of-flow address capture - all accessible through standard Freescale Codewarrior or compatible tools.

Can the MC9S08SH4CWJ operate in ultra-low-power modes with peripheral functionality enabled?

Yes, the MC9S08SH4CWJ supports stop3 mode - its deepest low-power state - where the CPU, flash, and most clocks are disabled while retaining RAM content and enabling selective peripheral operation. In stop3, the RTC continues running from its 1-kHz internal oscillator, and the ADC, ACMP, and SCI can generate wake-up interrupts. This allows the MC9S08SH4CWJ to achieve sub-10 µA typical current draw while maintaining responsiveness to analog events or scheduled timing triggers.

What analog features are integrated into the MC9S08SH4CWJ?

The MC9S08SH4CWJ integrates a 12-channel, 10-bit ADC with 2.5 µs conversion time, internal temperature sensor, and dedicated bandgap reference channel. It also includes an analog comparator (ACMP) with selectable interrupt on rising/falling/both edges, option to compare against internal bandgap voltage, and output routable to TPM for hardware-triggered actions. Both ADC and ACMP remain operational in stop3 mode, enabling always-on sensing without CPU intervention.

Is the MC9S08SH4CWJ pin-compatible with other members of the SH-series microcontrollers?

Yes, the MC9S08SH4CWJ shares identical 24-QFN pinout (98ASA00474D) and signal mapping with MC9S08SH8CWJ and MC9S08SH16CWJ, as confirmed in the MC9S08SH8 Rev. 3 datasheet and QFN Addendum Rev. 0. All three devices use the same mechanical drawing, thermal pad layout, and I/O assignment - allowing direct substitution in existing designs when memory requirements permit, without PCB revision.