NXP Semiconductors S9S08RN32W1CLF

Overview

S9S08RN32W1CLF from NXP Semiconductors (formerly Freescale) is an 8-bit S08 core microcontroller designed for automotive and industrial embedded control. It features 32 KB on-chip flash, 256-byte EEPROM with ECC, 4 KB RAM, operates from 2.7–5.5 V across –40 °C to 125 °C, and supports up to 20 MHz bus frequency. It integrates ADC, FTM, SCI, SPI, IIC, TSI, and real-time clock - deployed in engine control modules, body electronics, and motor drive interfaces.

For engineers reviewing the S9S08RN32W1CLF datasheet, S9S08RN32W1CLF pinout, S9S08RN32W1CLF application, or S9S08RN32W1CLF equivalent, this page delivers verified technical context, validated package mapping (32-pin LQFP), confirmed peripheral timing specs, low-power stop3 mode current (3.8 µA), and two field-validated alternative parts for functional migration paths.

Technical Context

The S9S08RN32W1CLF implements an enhanced S08 CPU with four-level nested interrupt support and up to 40 interrupt/reset sources. Its internal clock system combines a Pierce oscillator (XOSC) and frequency-locked-loop (FLL)-based ICS, enabling precise 39.0625 kHz internal reference and ±2.0% DCO output deviation over –40 °C to 125 °C.

Peripherals include three FlexTimer Modules (one 6-channel, two 2-channel), 16-channel 12-bit ADC with 2.5 µs conversion time and stop-mode operation, and a single-wire background debug interface with three hardware breakpoints. Memory protection, watchdog with independent clock, and low-voltage detection with configurable trip points ensure robust operation in safety-critical environments.

Key Specifications

Pinout & Package

Package: 32-pin LQFP (lead-free, RoHS-compliant), thermal resistance θJA = 86 °C/W (single-layer board), 57 °C/W (four-layer board).

Key Features

Applications

Equivalent & Alternatives

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

Compared with S9S08RN32W1CLF, MC9S08RN32CFUE requires PCB revision but offers broader commercial temperature support, while S9S08RN48W1CLF provides seamless pin-compatible upgrade path with 50% more flash - both preserve identical peripheral timing, debug interface, and low-power behavior.

Availability

S9S08RN32W1CLF is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor drives, smart appliance control, and medical sensor interface applications requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-aligned reliability.

Supply support for S9S08RN32W1CLF 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 through its acquisition of Freescale Semiconductor.

The S08RN family was engineered for cost-sensitive, high-reliability embedded control in harsh environments - emphasizing low-power operation, integrated analog peripherals, and automotive-grade qualification (–40 °C to 125 °C, AEC-Q100 stress-tested).

FAQ

What is the maximum bus frequency supported by the S9S08RN32W1CLF?

The S9S08RN32W1CLF 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 frequency-locked-loop (FLL) with trimmed internal reference or external crystal input. The S9S08RN32W1CLF maintains timing compliance and flash access integrity at this rate under worst-case conditions.

Does the S9S08RN32W1CLF support in-circuit debugging, and what interface is used?

Yes, the S9S08RN32W1CLF supports in-circuit debugging via a single-wire background debug (BKGD) interface shared with PTA0. It includes three hardware breakpoints, on-chip in-circuit emulator (ICE) with two comparators and nine trigger modes, and full flash programming capability - all without requiring a dedicated JTAG header or additional pins.

What are the low-power modes available on the S9S08RN32W1CLF, and what is the lowest current consumption?

The S9S08RN32W1CLF offers multiple low-power modes including wait mode and stop3 mode. In stop3 mode with only the 1 kHz LPO clock active, typical current consumption is 3.8 µA at 5 V and –40 °C to 125 °C. Additional peripherals like ADC (+44 µA), TSI (+111 µA), or LVD (+130 µA) increment this base current, all measured and specified in the official datasheet.

Can the S9S08RN32W1CLF operate from a single 3.3 V supply, and are there any limitations?

Yes, the S9S08RN32W1CLF operates reliably from a 3.3 V supply within its 2.7–5.5 V range. At 3 V, bus frequency is limited to 20 MHz (same max as 5 V), and I/O drive strength remains fully functional - standard-drive pins deliver VOH ≥ VDD – 0.8 V and VOL ≤ 0.8 V at 2.5 mA load. Flash programming and EEPROM operations are fully supported at 3 V.

What packaging and RoHS compliance status does the S9S08RN32W1CLF have?

The S9S08RN32W1CLF is supplied in a 32-pin LQFP package (body size 7 mm × 7 mm, 0.8 mm pitch) with lead-free (Pb-free) terminations compliant with RoHS Directive 2011/65/EU. It carries moisture sensitivity level (MSL) 3 per J-STD-020 and is qualified for reflow soldering at peak temperatures up to 260 °C.