NXP Semiconductors MC9S08SH8MPJ

Overview

MC9S08SH8MPJ from Freescale Semiconductor is an 8-bit HCS08 microcontroller with 8 KB Flash, 512 B RAM, and a 40-MHz CPU core. It integrates ADC (12-channel, 10-bit), analog comparator, RTC, two TPM modules, SCI, SPI, and I²C interfaces. Packaged in 24-QFN, it supports stop3 mode operation and real-time interrupt wake-up for low-power sensor monitoring applications.

For engineers reviewing the MC9S08SH8MPJ datasheet, MC9S08SH8MPJ pinout, MC9S08SH8MPJ application, or MC9S08SH8MPJ equivalent, key selection criteria include its 24-QFN footprint, internal clock source with FLL (2–20 MHz bus), 17 GPIOs with configurable slew rate and pull-ups, and support for LIN-compliant SCI with extended break generation.

Technical Context

The MC9S08SH8MPJ implements the S08CPUV2 core with HC08 instruction set plus BGND, supporting up to 32 interrupt/reset sources. Its Internal Clock Source (ICS) uses a frequency-locked loop (FLL) with precision-trimmed internal reference (0.2% resolution, ±2% deviation over voltage/temperature), enabling stable bus frequencies from 2 MHz to 20 MHz without external crystal.

Peripherals include a 10-bit ADC with 2.5 µs conversion time and temperature sensor channel, dual 2-channel TPM modules supporting edge- or center-aligned PWM, and an RTC with free-running 1-kHz low-power oscillator that operates in all MCU modes-including stop3-enabling cyclic wake-up without external components.

Key Specifications

Pinout & Package

MC9S08SH8MPJ is housed in a 24-pin QFN package (case outline 98ASA00474D), measuring 4 mm × 4 mm × 0.85 mm with an exposed thermal pad. The package uses copper wire bonding and is RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08SH8MPJ, MC9S08AC16CPUE offers scalable memory while preserving identical peripheral functionality and layout compatibility; S9KEAZ128AMLH delivers architectural modernization and expanded peripherals but requires full hardware and software redesign due to non-overlapping pinout and core architecture.

Availability

MC9S08SH8MPJ is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, smart appliance control boards, and portable medical diagnostics requiring stable component supply and long-term lifecycle support.

Supply support for MC9S08SH8MPJ 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 was a U.S.-based semiconductor company specializing in embedded processors, analog, and connectivity solutions before its acquisition by NXP Semiconductors in 2015.

The MC9S08SH8MPJ belongs to the HCS08 microcontroller family, designed for cost-sensitive, low-power embedded control applications in automotive, industrial, and consumer markets where deterministic real-time response and minimal external components are critical.

FAQ

What is the maximum operating frequency of the MC9S08SH8MPJ?

The MC9S08SH8MPJ features an HCS08 CPU core rated for up to 40 MHz operation. Its internal clock source (ICS) supports bus frequencies from 2 MHz to 20 MHz using the frequency-locked loop (FLL), with external crystal or resonator options extending system clock flexibility. The 40-MHz core rating ensures deterministic execution of time-critical control loops in applications like motor timing and LIN communication.

Does the MC9S08SH8MPJ support LIN communication?

Yes, the MC9S08SH8MPJ supports LIN communication through its SCI module, which includes dedicated hardware for LIN master extended break generation and LIN slave extended break detection. This enables direct implementation of LIN 2.0/2.1 protocols without external transceivers or bit-banging, making MC9S08SH8MPJ suitable for automotive body electronics and distributed sensor networks requiring standardized serial communication.

What power-saving modes does the MC9S08SH8MPJ offer?

The MC9S08SH8MPJ provides multiple low-power modes: Run, Wait, Stop2, and Stop3. Stop3 is the deepest sleep mode, drawing less than 10 µA while retaining operation of the RTC, analog comparator, and certain wakeup sources. This allows MC9S08SH8MPJ to maintain timekeeping and respond to analog events autonomously - essential for battery-powered sensor nodes and energy-conscious designs.

Is the MC9S08SH8MPJ pin-compatible with other HCS08 devices in 24-QFN packages?

Yes, the MC9S08SH8MPJ shares the same 24-QFN footprint (98ASA00474D) and pin assignment with other members of the SH-series such as MC9S08SH4MPJ, and also matches the 24-QFN variants of the AC-series (e.g., MC9S08AC16CPUE). This enables hardware reuse across product variants with differing Flash/RAM configurations, reducing PCB redesign effort during feature scaling or cost optimization.

How is debug supported on the MC9S08SH8MPJ?

The MC9S08SH8MPJ supports single-wire background debug (BDM) via the BKGD/MS pin, enabling full in-circuit emulation with breakpoint capability, on-chip debug module (ICE), and flash programming. It includes one hardware breakpoint and two additional breakpoints in the on-chip debug module, along with an eight-deep FIFO for change-of-flow tracing - providing robust development visibility without requiring a multi-pin debug header or external emulator.