NXP Semiconductors S9S08RN32W1MLF

Overview

S9S08RN32W1MLF from NXP Semiconductors (formerly Freescale) is an 8-bit S08 MCU with 32 KB flash, 4 KB RAM, and 256-byte EEPROM with ECC, operating at up to 20 MHz bus frequency across –40 °C to 125 °C. It integrates ADC (12-bit, 16-channel), three FTM modules, three SCI/UARTs, I²C, SPI, RTC, TSI, and ACMP - deployed in automotive body control modules, industrial sensor nodes, and motor drive supervision systems.

For engineers reviewing the S9S08RN32W1MLF datasheet, S9S08RN32W1MLF pinout, S9S08RN32W1MLF application, or S9S08RN32W1MLF equivalent, key selection criteria include its -40 °C to 125 °C extended temperature rating, on-chip EEPROM with error correction, stop3 mode current of 3.8 µA at 5 V, 16-channel 12-bit ADC with stop-mode operation, and single-wire BDM debug interface for space-constrained embedded designs.

Technical Context

The S9S08RN32W1MLF implements the S08 CPU core with four-level nested interrupt support and up to 40 interrupt/reset sources. Its clock system combines an external crystal oscillator (XOSC) and internal clock source (ICS) with FLL, enabling precise 1–20 MHz bus frequencies with ±1.0% trim accuracy over 0–70 °C and ±2.0% over –40–125 °C.

System protection includes independent watchdog timer, low-voltage detection with programmable trip points (VLVDH = 4.2–4.4 V, VLVDL = 2.56–2.66 V), illegal opcode/address detection, 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

32-pin LQFP (7 × 7 mm, 0.8 mm pitch), RoHS-compliant, moisture sensitivity level 3 per J-STD-020.

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 S9S08RN32W1MLF uniquely delivers EEPROM with ECC, TSI, and guaranteed –40 °C to 125 °C operation in a compact 32-pin LQFP - making it optimal for cost-sensitive, space-constrained automotive and industrial control where robust nonvolatile storage and capacitive touch are required.

Availability

S9S08RN32W1MLF is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, motor drive supervision, and smart appliance control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for S9S08RN32W1MLF 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 applications, with deep heritage in microcontrollers dating back to Motorola and Freescale.

The S9S08RN32W1MLF belongs to the S08RN family - designed specifically for cost-optimized, high-reliability embedded control in harsh environments, emphasizing extended temperature operation, integrated analog peripherals, and low-power execution for automotive body electronics and industrial automation.

FAQ

What is the maximum bus frequency supported by the S9S08RN32W1MLF?

The S9S08RN32W1MLF 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 FLL or external crystal oscillator (XOSC), with frequency stability maintained via factory-trimmed internal reference and optional external crystal calibration.

Does the S9S08RN32W1MLF include EEPROM with error correction?

Yes, the S9S08RN32W1MLF includes 256 bytes of on-chip EEPROM with built-in error correction code (ECC) and 2-byte erase sectors. It supports concurrent EEPROM program and erase operations while executing code from flash memory, enabling reliable parameter storage and field updates without halting application execution.

What low-power modes are available on the S9S08RN32W1MLF, and what is the lowest current draw?

The S9S08RN32W1MLF offers multiple low-power modes including reduced-power wait and stop3. In stop3 mode - where only the 1 kHz LPO clock remains active - it draws 3.8 µA at 5 V and –40 °C to 125 °C. Additional current adders apply for enabled peripherals (e.g., +44 µA for ADC, +111 µA for TSI), all specified in the datasheet's supply current table.

Can the S9S08RN32W1MLF operate in automotive under-hood environments?

Yes, the S9S08RN32W1MLF is qualified for operation from –40 °C to 125 °C ambient temperature and features automotive-grade system protection including independent watchdog, programmable low-voltage detection (VLVDH = 4.2–4.4 V, VLVDL = 2.56–2.66 V), and illegal opcode/address reset - making it suitable for under-hood applications such as engine bay sensors and body control modules.

How many analog-to-digital converter (ADC) channels does the S9S08RN32W1MLF support, and what is its resolution?

The S9S08RN32W1MLF integrates a 16-channel, 12-bit successive-approximation ADC with 2.5 µs conversion time, internal bandgap reference channel, optional hardware triggering, and full operation in stop mode. It also supports data buffering with watermark interrupts and automatic compare functions to reduce CPU overhead during continuous acquisition tasks.