NXP Semiconductors S9S08RN8W2MTGR

Overview

S9S08RN8W2MTGR from NXP Semiconductors (formerly Freescale) is an 8-bit S08 MCU with 8 KB flash, 256-byte EEPROM with ECC, and 2 KB RAM, operating at up to 20 MHz bus frequency across -40 °C to 125 °C. It integrates ADC (10-channel, 10-bit), dual SCI/UART, SPI, I²C, two FTM modules, RTC, TSI, and ACMP - designed for automotive body control, industrial sensor nodes, and low-power embedded systems requiring robust system protection and debug capability.

For engineers reviewing the S9S08RN8W2MTGR datasheet, S9S08RN8W2MTGR pinout, S9S08RN8W2MTGR application, or S9S08RN8W2MTGR equivalent, key selection criteria include its -40 °C to 125 °C extended temperature grade, on-chip EEPROM with error correction, stop3 mode current of 4.6 µA at 5 V, single-wire BDM debug interface, and support for LIN-compliant SCI operation in automotive subsystems.

Technical Context

The S9S08RN8W2MTGR implements an S08 CPU core with four-level nested interrupt handling and up to 40 interrupt/reset sources. Its clock system combines an external crystal oscillator (XOSC) and an internal clock source (ICS) with FLL, enabling precise frequency locking and factory-trimmed DCO output (±2.0% deviation over -40 °C to 125 °C).

System-level protection includes independent watchdog timer, configurable low-voltage detection (LVD) with multiple trip points (e.g., VLVDH = 4.2–4.4 V), illegal opcode/address reset, and flash/RAM access protection. Peripheral clock gating via PCE registers enables selective module power-down in low-power wait and stop3 modes.

Key Specifications

Pinout & Package

16-pin TSSOP (TG package), 0.65 mm pitch, exposed pad not present. Pin functions validated per S9S08RN16 Series Data Sheet Rev 1 (02/2014), Table 8.2 "Device pin assignment" for 16-pin variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08RN8CTG, S9S08RN8W2MTGR delivers certified automotive-grade thermal resilience and enhanced system protection; versus S9S08RN16W2MTGR, it trades flash capacity for lower cost and smaller memory footprint while retaining identical peripheral functionality and pin compatibility.

Availability

S9S08RN8W2MTGR is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, and smart appliance subsystems requiring stable component supply across extended temperature and long product lifecycles.

Supply support for S9S08RN8W2MTGR 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 acquired Freescale in 2015 and continues development of the S08 portfolio, focusing on high-reliability microcontrollers for automotive, industrial, and IoT edge applications.

The S08RN series was designed specifically for cost-sensitive, thermally demanding embedded control tasks - emphasizing low-power operation, integrated analog peripherals, and robust system-level fault handling without external supervision circuitry.

FAQ

What is the maximum bus frequency supported by the S9S08RN8W2MTGR?

The S9S08RN8W2MTGR supports a maximum bus frequency of 20 MHz across its full operating voltage range (2.7 V to 5.5 V) and temperature range (-40 °C to 125 °C). This is achieved using the internal clock source (ICS) with frequency-locked-loop (FLL) and factory-trimmed DCO, delivering ±2.0% accuracy over the full temperature range. The S9S08RN8W2MTGR maintains timing compliance under worst-case voltage and thermal conditions without derating.

Does the S9S08RN8W2MTGR support in-circuit debugging, and what interface is used?

Yes, the S9S08RN8W2MTGR supports in-circuit debugging via a single-wire background debug (BDM) interface using the BKGD pin. It includes on-chip in-circuit emulator (ICE) functionality with two comparators and nine trigger modes, plus breakpoint capability for up to three simultaneous breakpoints. This allows full visibility into program flow, register state, and memory contents during live operation without requiring dedicated debug pins beyond BKGD and RESET_B.

What are the EEPROM endurance and data retention specifications for the S9S08RN8W2MTGR?

The S9S08RN8W2MTGR features 256 bytes of EEPROM with built-in error-correcting code (ECC), rated for a minimum of 100,000 erase/write cycles and guaranteed data retention of 10 years at 85 °C or 20 years at 25 °C. ECC detects and corrects single-bit errors transparently during read operations, ensuring data integrity in safety-critical or logging applications where uncorrected corruption could compromise system behavior.

Can the S9S08RN8W2MTGR operate in low-power modes while maintaining real-time clock functionality?

Yes, the S9S08RN8W2MTGR supports RTC operation in stop3 mode using the 1 kHz low-power oscillator (LPO) clock source. In this state, the RTC continues incrementing while total supply current remains at 4.6 µA (typical at 5 V), enabling accurate timekeeping during extended sleep periods. The RTC can generate interrupts to wake the MCU, and its 16-bit counter provides resolution up to 65.535 seconds before rollover.

What is the ADC configuration for the S9S08RN8W2MTGR in the 16-pin TSSOP package?

In the 16-pin TSSOP package (TG), the S9S08RN8W2MTGR implements an 8-channel, 10-bit successive-approximation ADC with 2.5 µs conversion time, internal bandgap reference channel, automatic compare function, and optional hardware trigger. It supports operation in stop mode and includes data buffers with watermark capability. Channel count is reduced from 12 (48-pin) or 10 (20-pin) variants due to pin count limitations, with analog inputs mapped to PTA0–PTA3 and PTB0–PTB3.