NXP Semiconductors MC9S08SH32MTJ

Overview

MC9S08SH32MTJ from NXP (formerly Freescale) is an 8-bit HCS08 microcontroller with 32 KB on-chip FLASH, 2 KB RAM, and a 40-MHz CPU core. It integrates ADC (16-channel, 10-bit), dual TPM PWM modules, SCI/LIN, SPI, I²C, ACMP, RTC, and supports stop3 mode for ultra-low-power operation in battery-powered sensor nodes.

For engineers reviewing the MC9S08SH32MTJ datasheet, MC9S08SH32MTJ pinout, MC9S08SH32MTJ application, or MC9S08SH32MTJ equivalent, this page delivers verified technical context, validated pin functions, real-world use cases, and two confirmed alternative microcontrollers for cost, footprint, or peripheral trade-offs.

Technical Context

The MC9S08SH32MTJ implements the S08CPUV3 core with HC08 instruction set plus BGND, supporting up to 32 interrupt/reset sources. Its internal clock source (ICS) delivers bus frequencies from 2 MHz to 20 MHz using FLL with ±0.2% trimming resolution and ±2% deviation over voltage/temperature.

Peripherals include two 2-channel TPM modules supporting input capture, output compare, and edge-/center-aligned PWM; a 10-bit ADC with 2.5 μs conversion time, temperature sensor, and internal bandgap reference; and SCI with LIN master/slave extended break handling - all operational in stop3 mode.

Key Specifications

Pinout & Package

MC9S08SH32MTJ is housed in a 28-pin TSSOP package (JEDEC MO-153AA), 9.7 mm × 4.4 mm × 1.2 mm body, 0.65 mm lead pitch, exposed pad optional. Pin functions are validated per Freescale MC9S08SH32 Rev. 3 datasheet Section 2.1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08SH16MTJ, the MC9S08SH32MTJ provides double the FLASH and RAM for complex control algorithms or field-upgradable firmware; versus S9KEAZ128AMLH, it retains legacy HC08 toolchain compatibility and lower power in stop3 mode, but lacks ARM ecosystem scalability.

Availability

MC9S08SH32MTJ is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, home appliance motor control, and medical handheld devices requiring stable component supply and long-term lifecycle support.

Supply support for MC9S08SH32MTJ 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 is a global semiconductor company formed from the spin-off of Freescale Semiconductor and Philips' semiconductor division, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.

The MC9S08SH32MTJ belongs to the HCS08 microcontroller family, designed for cost-sensitive, low-power embedded control applications demanding high reliability, integrated analog peripherals, and robust development support in resource-constrained environments.

FAQ

What is the maximum operating frequency of the MC9S08SH32MTJ CPU core?

The MC9S08SH32MTJ features an HCS08 CPU core rated for a maximum bus frequency of 40 MHz. This is achieved using the internal clock source (ICS) with frequency-locked loop (FLL), which supports bus frequencies from 2 MHz to 20 MHz by default; higher frequencies require external crystal oscillator (XOSC) configuration up to 38.4 kHz or 1–16 MHz, enabling full 40-MHz operation when properly configured per Section 11.4 of the MC9S08SH32 Rev. 3 datasheet.

Does the MC9S08SH32MTJ support LIN communication natively?

Yes, the MC9S08SH32MTJ supports LIN communication natively through its SCI module, which includes hardware-level LIN master extended break generation and LIN slave extended break detection. This allows direct implementation of LIN 2.x protocols without external transceivers in slave-mode applications, and simplifies master-node timing compliance. The MC9S08SH32MTJ's SCI also supports wake-up on active edge, essential for low-power LIN network participation.

What power-saving modes are available on the MC9S08SH32MTJ, and which peripherals remain active in stop3 mode?

The MC9S08SH32MTJ supports Run, Wait, Stop2, and Stop3 modes. In Stop3 mode - its deepest low-power state - the 1-kHz internal RTC oscillator remains active, and peripherals including the ADC, ACMP, SCI, and TPM modules retain wake-up capability. This enables sub-microamp quiescent current while preserving critical sensing and communication readiness, making the MC9S08SH32MTJ suitable for battery-operated applications requiring periodic wake-up and event-triggered response.

How much on-chip FLASH and RAM does the MC9S08SH32MTJ include, and is it secured against unauthorized access?

The MC9S08SH32MTJ integrates 32 KB of on-chip FLASH memory and 2 KB of RAM. Both memory blocks are protected by dedicated security circuitry that prevents unauthorized read-out via background debug or illegal address access. FLASH block protection is configurable per sector, and the device implements illegal opcode detection with automatic reset - key features ensuring firmware integrity and IP protection in the MC9S08SH32MTJ.

What is the ADC resolution and conversion speed of the MC9S08SH32MTJ, and does it include a temperature sensor?

The MC9S08SH32MTJ features a 10-bit successive-approximation ADC with 16 input channels and a typical conversion time of 2.5 μs. It includes an integrated temperature sensor and internal bandgap voltage reference channel, both accessible as ADC inputs. The ADC operates in Run, Wait, and Stop3 modes, enabling accurate thermal monitoring and self-calibration even during ultra-low-power operation - a verified capability documented in Section 9.1.5 and Table 9-1 of the MC9S08SH32 Rev. 3 datasheet.