NXP Semiconductors S9S08SG8E2CTG

Overview

S9S08SG8E2CTG from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller with 8 KB flash, 512 B RAM, and integrated peripherals including 10-bit ADC, analog comparator, SCI, SPI, I²C, TPM PWM timers, and RTC. It operates at up to 40 MHz (36 MHz above 125 °C), supports stop3 low-power mode, and targets automotive body electronics and industrial control.

For engineers reviewing the S9S08SG8E2CTG datasheet, S9S08SG8E2CTG pinout, S9S08SG8E2CTG application, or S9S08SG8E2CTG equivalent, key selection criteria include its -40 °C to 150 °C extended temperature rating, single-wire background debug interface, on-chip FLL clock source with ±1.5% deviation over temperature, and support for LIN-compliant SCI wake-up and break handling.

Technical Context

The S9S08SG8E2CTG 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) trimmed for ±0.2% resolution and ±1.5% deviation from –40 °C to 125 °C - extended to ±3% above 125 °C.

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 major peripherals remain functional in stop3 mode.

Key Specifications

Pinout & Package

Package: 16-pin TSSOP (lead-free, RoHS-compliant). This package supports the full -40 °C to +150 °C operating range and is qualified for high-temperature automotive applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08SG4E2CTG and S9S08SG16E2CTG, the S9S08SG8E2CTG delivers optimal balance of memory headroom, thermal robustness, and peripheral integration for mid-tier automotive and industrial control nodes - avoiding both under-provisioning and unnecessary cost premium.

Availability

S9S08SG8E2CTG is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor controllers, smart lighting nodes, and engine bay sensor hubs requiring stable component supply across extended temperature ranges.

Supply support for S9S08SG8E2CTG 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 leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with roots in Freescale's embedded MCU heritage.

The S9S08SG8E2CTG belongs to the HCS08 SG-series - a family of cost-optimized, high-temperature-rated 8-bit MCUs designed specifically for automotive body electronics and industrial control where reliability, low power, and LIN/UART interoperability are critical.

FAQ

What is the maximum operating temperature specification for the S9S08SG8E2CTG?

The S9S08SG8E2CTG is rated for continuous operation from –40 °C to +150 °C. This extended temperature range is validated per Freescale/NXP qualification standards for automotive under-hood and engine bay applications. The CPU frequency is derated to 36 MHz above 125 °C to maintain timing integrity, and the internal FLL accuracy specification changes from ±1.5% to ±3% across the full range. S9S08SG8E2CTG maintains full peripheral functionality - including ADC, ACMP, RTC, and SCI - throughout this range.

Does the S9S08SG8E2CTG support LIN communication natively?

Yes, the S9S08SG8E2CTG supports LIN 2.x communication natively through its SCI module. It provides hardware-level generation of extended dominant breaks (13-bit) required for LIN master nodes and detection of extended breaks for slave node synchronization. No external LIN transceiver is needed for basic point-to-point or single-master network topologies. The S9S08SG8E2CTG SCI also supports wake-up on active edge and automatic baud rate detection, simplifying implementation in automotive body networks.

What debug interface does the S9S08SG8E2CTG use, and what capabilities does it provide?

The S9S08SG8E2CTG uses a single-wire background debug (BDM) interface accessible via the BKGD/MS pin. It supports real-time in-circuit debugging, including run/stop control, register and memory inspection, and single-step execution. The on-chip debug module provides one hardware breakpoint and two additional breakpoints via the ICE module, along with an eight-deep FIFO for trace data. This interface enables full firmware development and validation without requiring dedicated JTAG headers or external emulators - reducing test fixture complexity for S9S08SG8E2CTG-based designs.

Can the S9S08SG8E2CTG operate in low-power modes while maintaining analog peripheral functionality?

Yes, the S9S08SG8E2CTG supports stop3 mode - an ultra-low-power state where the CPU and bus clocks are halted but key analog and timing peripherals remain active. In stop3, the 10-bit ADC, 5-V analog comparator (ACMP), real-time counter (RTC), and SCI with wake-up capability continue to function. This allows battery-powered applications to perform periodic sensor sampling, detect threshold crossings, or respond to serial events without waking the CPU, significantly extending operational life. S9S08SG8E2CTG retains RAM contents and register states across stop3 entry/exit.

What clock sources are available on the S9S08SG8E2CTG, and how accurate is the internal option?

The S9S08SG8E2CTG offers two primary clock sources: an external crystal/ceramic resonator (31.25 kHz–16 MHz) via XTAL/EXTAL pins, and an internal clock source (ICS) with frequency-locked loop (FLL). The ICS uses a factory-trimmed internal reference to achieve ±0.2% resolution and ±1.5% deviation over –40 °C to 125 °C - extended to ±3% above 125 °C. This eliminates the need for external crystals in cost-sensitive applications while maintaining sufficient accuracy for UART, LIN, and PWM timing. S9S08SG8E2CTG supports bus frequencies from 2 MHz to 20 MHz using the ICS.