NXP Semiconductors MC9S08SH4MTGR

Overview

MC9S08SH4MTGR from Freescale Semiconductor is an 8-bit HCS08 microcontroller with 4 KB Flash, 256 B RAM, and a 40-MHz CPU core. It integrates ADC (12-channel, 10-bit), SPI, I²C, SCI, two TPM modules, RTC, ACMP, and supports Stop3 mode for ultra-low-power operation. Used in battery-powered sensor nodes and industrial control panels requiring deterministic real-time response.

For engineers reviewing the MC9S08SH4MTGR datasheet, MC9S08SH4MTGR pinout, MC9S08SH4MTGR application, or MC9S08SH4MTGR equivalent, key selection criteria include Flash endurance (100k erase/write cycles), internal clock source accuracy (±2% over voltage/temperature), QFN-24 package thermal performance, and background debug interface compatibility with standard S08 tools.

Technical Context

The MC9S08SH4MTGR implements the HCS08 CPU 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 -40°C to 125°C) to generate bus frequencies from 2 MHz to 20 MHz.

Peripherals operate across power modes: ADC and ACMP remain functional in Stop3 mode; RTC runs continuously on 1-kHz low-power oscillator; SCI supports LIN master break generation and wake-up on active edge; TPM modules support input capture, output compare, and edge- or center-aligned PWM.

Key Specifications

Pinout & Package

MC9S08SH4MTGR is housed in a 24-pin QFN package (5 mm × 5 mm, 0.5 mm pitch) with exposed thermal pad. Pinout conforms to MC9S08SH8 family layout per datasheet Rev. 3 (June 2008), with identical signal mapping for all 24 pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08SH4MTGR, MC9S08SH8MTGR offers immediate memory scalability within identical QFN-24 packaging and toolchain compatibility, while S9S08SG48E1MTJR trades pin compatibility for significantly expanded resources and thermal robustness - making it appropriate only for new designs targeting higher complexity.

Availability

MC9S08SH4MTGR is available at Aetrix Electronics and suitable for industrial sensor nodes, smart thermostat controllers, and automotive body control modules requiring stable component supply and long-term production continuity.

Supply support for MC9S08SH4MTGR 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) was a leading designer of embedded processors, analog, and connectivity solutions for automotive, industrial, and consumer markets.

The MC9S08SHx series targets cost-sensitive, low-power 8-bit control applications - emphasizing integrated analog peripherals, ultra-low-power stop modes, and single-wire debug for rapid development in resource-constrained environments.

FAQ

What is the maximum operating frequency of the MC9S08SH4MTGR?

The MC9S08SH4MTGR features a 40-MHz HCS08 CPU core, enabling instruction execution at 25 ns per cycle. Its internal clock source (ICS) supports bus frequencies from 2 MHz to 20 MHz using the frequency-locked loop (FLL), and external crystal oscillators up to 16 MHz. The 40-MHz core rating reflects peak processing capability under optimal conditions, and the MC9S08SH4MTGR maintains full functionality across its specified voltage (2.7–5.5 V) and temperature (−40°C to 125°C) ranges.

Does the MC9S08SH4MTGR support in-circuit debugging?

Yes, the MC9S08SH4MTGR includes a single-wire background debug interface (BKGD/MS pin) compliant with the HCS08 standard. This interface supports breakpoint setting, memory inspection, register read/write, and flash programming without halting real-time operation. The on-chip debug module contains two comparators, nine trigger modes, and an eight-deep FIFO for change-of-flow tracing - all accessible via standard S08 debug tools such as P&E Micro's Cyclone or SEGGER J-Link with appropriate adapter.

What power-saving modes does the MC9S08SH4MTGR offer?

The MC9S08SH4MTGR provides three primary low-power modes: Wait mode (CPU halted, peripherals active), Stop2 (deep sleep with partial peripheral retention), and Stop3 (ultra-low-power state drawing <1 µA while maintaining RTC operation). In Stop3, the 1-kHz internal low-power oscillator continues running to sustain real-time wake-up intervals, and both ADC and ACMP retain functionality - allowing sensor sampling without full wake-up. These modes are controlled via the System Power Management Status and Control registers (SPMSC1/SPMSC2).

Is the MC9S08SH4MTGR pin-compatible with other devices in the SHx family?

Yes, the MC9S08SH4MTGR shares identical pin assignment and electrical characteristics with the MC9S08SH8MTGR and MC9S08SH16MTGR in the 24-QFN package variant. All SHx QFN-24 devices use the same mechanical outline (98ASA00474D per Freescale QFN Addendum Rev. 0, July 2014) and signal mapping per datasheet Rev. 3. This allows direct substitution of MC9S08SH4MTGR with MC9S08SH8MTGR for memory upgrades without PCB redesign - provided firmware accommodates the increased Flash/RAM resources.

What analog peripherals are integrated into the MC9S08SH4MTGR?

The MC9S08SH4MTGR integrates a 12-channel, 10-bit successive-approximation ADC with 2.5 µs conversion time, automatic compare function, and built-in temperature sensor; plus a dual-input analog comparator (ACMP) with selectable interrupt edges and routing capability to TPM modules. Both peripherals operate in Stop3 mode. An internal 1.2 V bandgap reference serves ADC and ACMP, eliminating external reference components. Analog supplies (VDDAD/VSSAD) are separated from digital rails to ensure noise immunity in mixed-signal applications.