S9S08RN16W2MLFR
S9S08RN16W2MLFR - 16KB 20MHz Automotive 8-Bit MCU | NXP
The NXP Semiconductors S9S08RN16W2MLFR is an automotive-qualified 8-bit S08 microcontroller with 16KB of Flash, a 20 MHz core, 39 I/O pins, and a 48-LQFP 7 x 7 mm package. Its -40C to +125C temperature range supports applications from industrial control to electrically demanding automotive systems. Verified distributor data identifies connectivity including I2C, LINbus, SPI, and UART/USART, along with LVD, POR, PWM, and watchdog peripherals. The MCU provides 256 x 8 bytes of EEPROM according to the available component listing.
What is an automotive 8-bit microcontroller? An MCU is a semiconductor that integrates a processor core, program memory, data memory, peripherals, and I/O on one device. An 8-bit MCU executes compact embedded-control instructions efficiently and belongs to the broader embedded processor and microcontroller hierarchy. The S08RN family targets cost-sensitive systems ranging from simple 2KB-Flash devices in 8-pin packages to feature-rich derivatives with 60KB Flash in 64-pin packages.
The headline features are 16KB of 16K x 8 Flash, operation up to 20 MHz, and an extended -40C to +125C temperature range. Its 39 I/O pins provide substantial external interface capacity for sensing, actuator control, communications, and diagnostics. Verified connectivity includes I2C, LINbus, SPI, and UART/USART, allowing the device to bridge sensors and external controllers without relying on discrete interface devices.
S08RN devices combine an 8-bit CPU with integrated embedded-control peripherals. The listing specifically identifies low-voltage detection, power-on reset, pulse-width modulation, and a watchdog timer. PWM supports proportional actuator or power-control tasks, while the watchdog and reset functions improve recovery behavior. The 256-byte EEPROM provides nonvolatile data storage for calibration, configuration, counters, or diagnostic records, although endurance and write timing require confirmation from the manufacturer documentation.
Typical uses include body and comfort modules, sensor interfaces, small motor controllers, automotive communication nodes, instrumentation, and industrial embedded controls. LINbus is particularly relevant to vehicle networks, while UART/USART, SPI, and I2C support sensors, external memory, transceivers, and supervisory components. The 48-LQFP package also exposes substantially more I/O than smaller S08RN packages, making it suitable for designs that need several peripheral functions without moving to a larger 8-bit device.
Engineers should verify the exact pin multiplexing, clock configuration, memory map, and electrical limits in the official NXP datasheet before layout release. The 7 x 7 mm LQFP has exposed leads on all four sides and benefits from adequate solder mask clearance and thermal-aware placement. Automotive production decisions must also verify qualification, traceability, software support, and supply-chain documentation using controlled NXP records.
This page consolidates verified distributor specifications, automotive and interface positioning, procurement sources, and selection considerations. It distinguishes confirmed public data from parameters that still require manufacturer documentation, helping engineers evaluate the S9S08RN16W2MLFR without treating inferred values as production specifications.
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