NXP Semiconductors S9S08RN16W2MLFR

Overview

S9S08RN16W2MLFR from NXP Semiconductors (formerly Freescale) is an automotive-grade 8-bit S08 microcontroller with 16 KB flash, 256-byte EEPROM with ECC, and 2 KB RAM, operating from 2.7 V to 5.5 V across –40 °C to +125 °C. It integrates dual SCI/UART, I²C, SPI, two FTM timer modules, 12-bit ADC (12-channel in 48-pin variant), TSI touch sensing, and on-chip background debug interface - deployed in engine control units, body electronics, and industrial sensor nodes.

For engineers reviewing the S9S08RN16W2MLFR datasheet, S9S08RN16W2MLFR pinout, S9S08RN16W2MLFR application, or S9S08RN16W2MLFR equivalent, this page delivers verified technical context, package-specific pin mapping, real-world use cases, and validated alternative options for automotive and industrial embedded designs requiring AEC-Q100–qualified MCU continuity.

Technical Context

The S9S08RN16W2MLFR implements an enhanced S08 CPU core with four-level nested interrupt support and up to 40 interrupt/reset sources. Its clock system combines a Pierce oscillator (XOSC) for crystal/resonator operation and an internal clock source (ICS) with frequency-locked-loop (FLL), enabling precise 1–20 MHz bus frequencies with ±2% deviation over –40 °C to +125 °C.

System protection includes independent watchdog timer, low-voltage detection with programmable trip points (LVDH/LVDL ranges), illegal opcode/address reset, and flash/RAM access protection. Peripherals are selectively gated via peripheral clock enable register to reduce current in Stop3 mode, where only 1 kHz LPO remains active - achieving 4.6 µA typical supply current.

Key Specifications

Pinout & Package

Package: 48-pin LQFP (7 mm × 7 mm, 0.5 mm pitch), thermally rated θ_JA = 82 °C/W (single-layer board) and 58 °C/W (four-layer board).

Key Features

Applications

Equivalent & Alternatives

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

Compared with S9S08RN16W2MLFR, MC9S08RN16W2MLF offers identical functionality in alternate packaging, while S9S08RN8W2MLFR reduces memory and peripherals - making it suitable only for scaled-down implementations where firmware footprint and feature count are strictly constrained.

Availability

S9S08RN16W2MLFR is available at Aetrix Electronics and suitable for automotive ECU development, industrial sensor node design, and smart HVAC controller production requiring stable component supply and long-term lifecycle support.

Supply support for S9S08RN16W2MLFR 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 maintains full support for the legacy S08 portfolio, delivering high-reliability microcontrollers for automotive, industrial, and consumer applications.

The S9S08RN16W2MLFR belongs to the S08RN family - engineered specifically for cost-optimized, AEC-Q100–qualified automotive body electronics and engine management systems demanding extended temperature operation and robust on-chip peripherals.

FAQ

What is the maximum bus frequency supported by the S9S08RN16W2MLFR?

The S9S08RN16W2MLFR 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) or external crystal oscillator (XOSC) configurations. The 20 MHz performance is guaranteed per datasheet Table 5, with timing parameters characterized over the full industrial temperature range.

Does the S9S08RN16W2MLFR include hardware-based error correction for non-volatile memory?

Yes, the S9S08RN16W2MLFR includes ECC (Error Correction Code) for its 256-byte EEPROM block. This allows single-bit error correction and double-bit error detection during read operations, enhancing data integrity in automotive and industrial environments subject to radiation or voltage transients. Flash memory does not include ECC, but supports 100,000 program/erase cycles with >20-year data retention at 125 °C.

Can the S9S08RN16W2MLFR operate in ultra-low-power modes while maintaining real-time clock functionality?

Yes, the S9S08RN16W2MLFR supports Stop3 mode with the 16-bit RTC active using the 1 kHz low-power oscillator (LPO). In this state, total supply current is typically 4.6 µA (at 5 V), increasing by <1 µA when RTC is enabled. The RTC continues counting and can generate interrupts or wake the MCU - enabling precise timekeeping in battery-backed applications such as telematics loggers or HVAC scheduling.

What touch sensing capabilities does the S9S08RN16W2MLFR provide?

The S9S08RN16W2MLFR integrates a dedicated Touch Sensing Interface (TSI) module supporting up to 16 external electrodes. It features configurable software/hardware scan triggers, full compatibility with NXP's touch sensing software library, and the ability to wake the MCU from Stop3 mode upon electrode activation. TSI operates independently of CPU load and supports noise filtering for reliable operation in electrically noisy automotive environments.

Is the S9S08RN16W2MLFR pin-compatible with other members of the S08RN family?

The S9S08RN16W2MLFR in 48-pin LQFP is pin-compatible with the S9S08RN8W2MLFR (8 KB flash variant) in the same package, sharing identical pin assignments and electrical characteristics. However, it is not pin-compatible with 32-pin, 20-pin, or 16-pin variants of the S08RN family due to differing pin counts and signal multiplexing - always verify package-specific pinout diagrams before PCB layout.