NXP Semiconductors S9S08SG4E2MTGR

Overview

S9S08SG4E2MTGR from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller designed for cost-sensitive, low-power embedded control applications. It features a 40 MHz CPU core, 4 KB flash memory, 512 B RAM, and integrated peripherals including 10-bit ADC, analog comparator, SCI, SPI, I²C, TPM PWM timers, and RTC-all operating across −40 °C to 125 °C. Used in automotive body electronics, industrial sensors, and appliance motor control.

For engineers reviewing the S9S08SG4E2MTGR datasheet, S9S08SG4E2MTGR pinout, S9S08SG4E2MTGR application, or S9S08SG4E2MTGR equivalent, key selection criteria include its 16-pin TSSOP package, 2 MHz–20 MHz bus frequency range via internal clock source (ICS), stop3 mode operation with ADC/ACMP active, LIN-capable SCI interface, and single-wire background debug support.

Technical Context

The S9S08SG4E2MTGR implements the HCS08 CPUV2 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 (±1.5% deviation over −40 °C to 125 °C), enabling stable bus frequencies from 2 MHz to 20 MHz without external crystal.

Peripherals are optimized for low-power operation: ADC and ACMP remain functional in stop3 mode; RTC runs on a free-running 1 kHz on-chip oscillator; SCI supports LIN master break generation and slave break detection; TPM modules provide edge- or center-aligned PWM with input capture and output compare on four total channels.

Key Specifications

Pinout & Package

16-pin TSSOP (Thin Shrink Small Outline Package), 0.65 mm pitch, thermal pad optional per manufacturer mechanical drawing. Pinout validated per MC9S08SG4 data sheet Rev. 8, Section 2.1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08SG8CDT, S9S08SG4E2MTGR trades memory capacity for lower unit cost and smaller code footprint; compared with S9KEAZ128AMLH, it offers proven reliability and toolchain maturity for legacy 8-bit control tasks without architectural migration overhead.

Availability

S9S08SG4E2MTGR is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, and home appliance motor control requiring stable component supply and long-term lifecycle assurance.

Supply support for S9S08SG4E2MTGR 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 S9S08SG4E2MTGR belongs to the HCS08 family - a mature, low-power 8-bit MCU platform engineered for deterministic real-time control in resource-constrained embedded systems with stringent cost and reliability requirements.

FAQ

What is the maximum operating frequency of the S9S08SG4E2MTGR CPU core?

The S9S08SG4E2MTGR CPU core operates at up to 40 MHz at temperatures ≤125 °C. At junction temperatures above 125 °C, the maximum frequency is reduced to 36 MHz to maintain timing integrity and reliability. This derating is specified in the electrical characteristics section of the official MC9S08SG4 data sheet Rev. 8. The S9S08SG4E2MTGR achieves this performance using the HCS08 CPUV2 architecture with optimized pipeline execution.

Does the S9S08SG4E2MTGR support LIN communication natively?

Yes, the S9S08SG4E2MTGR supports LIN 2.x physical layer functionality through its SCI module, which includes dedicated hardware for extended break generation (LIN master) and extended break detection (LIN slave). No external transceiver is required for basic LIN node operation. The S9S08SG4E2MTGR's SCI also supports wake-on-break and automatic baud rate detection, making it suitable for automotive body network applications where the S9S08SG4E2MTGR serves as a LIN endpoint controller.

What low-power modes are available on the S9S08SG4E2MTGR, and which peripherals remain active in stop3 mode?

The S9S08SG4E2MTGR supports two very low-power stop modes (stop2 and stop3), plus reduced-power wait mode. In stop3 mode - its deepest low-power state - the S9S08SG4E2MTGR disables the CPU, flash, and most clocks while keeping the RTC, ADC, ACMP, and selected wake sources (e.g., pin interrupts, RTC overflow) operational. This enables sub-microamp current draw while maintaining analog monitoring capability, a key feature for battery-powered or energy-harvesting applications using the S9S08SG4E2MTGR.

Can the S9S08SG4E2MTGR be programmed and debugged in-circuit without a dedicated JTAG header?

Yes, the S9S08SG4E2MTGR integrates a single-wire background debug (BDM) interface accessible via the BKGD/MS pin. This allows full in-circuit programming, erasure, and debugging - including breakpoint setting and register inspection - using only one signal plus power and ground. No JTAG header or additional debug pins are required, simplifying PCB layout and reducing BOM cost for designs based on the S9S08SG4E2MTGR.

What is the flash memory endurance and data retention specification for the S9S08SG4E2MTGR?

The S9S08SG4E2MTGR features 4 KB of on-chip flash memory with guaranteed endurance of 10,000 program/erase cycles and data retention of 10 years at 85 °C or 20 years at 25 °C. These specifications are verified per Freescale/NXP qualification standards and apply across the full operating voltage and temperature range. Flash operations on the S9S08SG4E2MTGR are controlled via dedicated registers (FSTAT, FCMD, etc.) and support burst programming for efficient firmware updates.