NXP Semiconductors S9S08RN32W1MLH

Overview

S9S08RN32W1MLH from NXP Semiconductors (formerly Freescale) is an 8-bit S08 core microcontroller designed for automotive and industrial control applications requiring extended temperature operation. It integrates 32 KB flash memory, 256-byte EEPROM with ECC, 2 KB RAM, and operates at up to 20 MHz bus frequency across –40 °C to +125 °C. Key peripherals include dual SCI/UART, I²C, SPI, two FTM timer modules, 12-bit ADC (12-channel), analog comparator, CRC module, RTC, and TSI touch-sensing interface.

For engineers reviewing the S9S08RN32W1MLH datasheet, S9S08RN32W1MLH pinout, S9S08RN32W1MLH application, or S9S08RN32W1MLH equivalent, this page delivers verified technical context, package-specific pin mapping, real-world use cases in engine control and body electronics, and validated alternative parts - all grounded in the official S9S08RN16DS Rev 1 (02/2014) datasheet and NXP product documentation.

Technical Context

The S9S08RN32W1MLH implements the 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 configurable trip points (e.g., VLVDH = 4.2–4.4 V), illegal opcode/address reset, and flash/RAM access protection. Debug is supported via single-wire background debug interface (BDM) with three breakpoints and on-chip ICE module featuring two comparators and nine trigger modes.

Key Specifications

Pinout & Package

Package: 32-pin LQFP (7 mm × 7 mm, 0.8 mm pitch), RoHS-compliant, moisture sensitivity level MSL3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08RN32CFUE and S9KEAZ32AMLH, the S9S08RN32W1MLH offers optimal balance of proven automotive qualification, ultra-low Stop3 current (4.6 µA), integrated touch sensing, and compact 32-pin LQFP packaging - making it ideal for cost-sensitive, space-constrained engine and body control nodes where legacy S08 software investment must be preserved.

Availability

S9S08RN32W1MLH is available at Aetrix Electronics and suitable for engine control units, body control modules, and industrial motor interface applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant operation.

Supply support for S9S08RN32W1MLH 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 specializing in secure connectivity solutions for automotive, industrial, and IoT markets, with deep heritage in microcontroller innovation dating back to Motorola and Freescale.

The S9S08RN32W1MLH belongs to the S08RN family - engineered specifically for cost-optimized, high-reliability automotive body electronics and powertrain subsystems operating at extended temperature ranges and demanding EMC environments.

FAQ

What is the maximum bus frequency supported by the S9S08RN32W1MLH?

The S9S08RN32W1MLH supports a maximum bus frequency of 20 MHz across its full operating voltage range (2.7–5.5 V) and temperature range (–40 °C to +125 °C). This is achieved using the internal clock source (ICS) with frequency-locked-loop (FLL) in FEE or FBE mode, or via external crystal/resonator through the XOSC module. The 20 MHz limit is guaranteed per the S9S08RN16DS Rev 1 datasheet Section 5.2.1.

Does the S9S08RN32W1MLH support in-circuit debugging, and what interface is used?

Yes, the S9S08RN32W1MLH supports in-circuit debugging via a single-wire background debug interface (BDM) using the BKGD/MS pin. It includes breakpoint capability for up to three breakpoints and an on-chip in-circuit emulator (ICE) debug module with two comparators and nine trigger modes. This interface is fully compatible with standard Freescale/NXP BDM debug tools and does not require additional JTAG hardware.

What are the flash and EEPROM endurance specifications for the S9S08RN32W1MLH?

The S9S08RN32W1MLH features 32 KB of flash memory rated for ≥100,000 program/erase cycles with data retention exceeding 20 years at +125 °C. Its 256-byte EEPROM includes built-in ECC for single-bit correction and double-bit detection per 2-byte sector, and is specified for ≥100,000 erase/write cycles. Both memories support concurrent execution and programming - allowing code to run from flash while writing to EEPROM.

Which package type and pin count does the S9S08RN32W1MLH use?

The S9S08RN32W1MLH uses a 32-pin LQFP package (7 mm × 7 mm, 0.8 mm pitch), designated by the "LH" suffix in the part number per the S9S08RN16 Series Data Sheet Section 2.3. This package is RoHS-compliant, moisture sensitivity level MSL3, and thermally rated for θ_JA = 88 °C/W on single-layer board and 59 °C/W on four-layer board.

Can the S9S08RN32W1MLH operate in low-power modes while maintaining peripheral functionality?

Yes, the S9S08RN32W1MLH supports multiple low-power modes including Stop3, where only the 1 kHz LPO clock remains active. In Stop3, peripherals like the ADC, TSI, and LVD can be configured to wake the device - with documented current adders of +40 µA (ADC), +121 µA (TSI), and +128 µA (LVD). The peripheral clock enable register allows selective clock gating to unused modules, reducing active current without disabling critical wake sources.