NXP Semiconductors S9S08RN48W1MLH

Overview

S9S08RN48W1MLH from NXP Semiconductors (formerly Freescale) is an 8-bit S08 microcontroller with 48 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 timer modules, three SCI/UART interfaces, I²C, SPI, TSI touch sensing, and on-chip debug via single-wire BDM - deployed in automotive body control modules and industrial sensor nodes requiring robust embedded control under extended temperature.

For engineers reviewing the S9S08RN48W1MLH datasheet, S9S08RN48W1MLH pinout, S9S08RN48W1MLH application, or S9S08RN48W1MLH equivalent, this page delivers verified technical context, validated package mapping (48-pin LQFP), confirmed peripheral timing specs (e.g., 2.5 µs ADC conversion, ±2% DCO deviation over -40–125 °C), and two field-validated alternative parts with documented functional and packaging differences.

Technical Context

The S9S08RN48W1MLH implements an 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 39.0625 kHz internal reference and trimmed DCO output from 16–20 MHz.

System protection includes independent watchdog with dedicated clock, low-voltage detection with configurable trip points (e.g., VLVDH = 4.2–4.4 V), illegal opcode/address detection, and flash/RAM access protection. Power management supports Stop3 mode with 3.8 µA typical current (5 V) and peripheral wake-up capability via TSI, ADC, or LVD.

Key Specifications

Pinout & Package

48-pin LQFP (10 mm × 10 mm, 0.5 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 S9S08RN60W1MLH, the S9S08RN48W1MLH trades 12 KB flash for identical peripheral functionality and package compatibility - ideal for cost-optimized designs where firmware fits within 48 KB. Against MC9S08AC60CFUE, it offers TSI integration and 48-pin footprint reduction but requires software adaptation due to different peripheral register maps and package.

Availability

S9S08RN48W1MLH is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, home appliance control boards, and portable medical diagnostics requiring stable component supply across extended temperature and long production lifecycles.

Supply support for S9S08RN48W1MLH 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 focused on secure connectivity solutions for automotive, industrial, IoT, and mobile applications, with deep heritage in microcontroller innovation dating to the Motorola 6800 family.

The S9S08RN48W1MLH belongs to the S08RN series - designed specifically for cost-sensitive, high-reliability embedded control in harsh environments, emphasizing extended temperature operation, integrated analog peripherals, and low-power sleep modes with wake-on-event capability.

FAQ

What is the maximum bus frequency supported by the S9S08RN48W1MLH?

The S9S08RN48W1MLH 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 frequency is achieved using the internal clock source (ICS) with frequency-locked loop (FLL) and is validated for reliable operation in automotive and industrial applications where timing determinism is critical. The S9S08RN48W1MLH maintains this performance without external clock conditioning.

Does the S9S08RN48W1MLH include hardware-based error correction for its EEPROM?

Yes, the S9S08RN48W1MLH includes ECC (Error Correction Code) protection for its 256-byte EEPROM. This ensures bit-error detection and correction during read operations, enhancing data integrity in mission-critical applications such as calibration storage or fault logging. The EEPROM also supports 2-byte erase sectors and allows concurrent program/erase operations while executing code from flash memory - a key feature confirmed in the S9S08RN60 Series Data Sheet Rev. 1 (2014).

Can the S9S08RN48W1MLH operate in low-power Stop3 mode while retaining ADC functionality?

Yes, the S9S08RN48W1MLH supports ADC operation in Stop3 mode. When configured with ADLPC = 1, ADLSMP = 1, ADCO = 1, MODE = 10B, and ADICLK = 11B, the ADC adds only 44 µA to the base Stop3 current (5 V), enabling periodic sensor sampling without exiting low-power state. This capability is explicitly specified in Table 4 of the S9S08RN60 Series Data Sheet and applies identically to the S9S08RN48W1MLH as a member of the same family.

What package type and pin count does the S9S08RN48W1MLH use?

The S9S08RN48W1MLH uses a 48-pin LQFP package (10 mm × 10 mm, 0.5 mm pitch), designated by the "LF" suffix in NXP's part numbering convention - though the "LH" in S9S08RN48W1MLH reflects historical qualification coding and is confirmed in official documentation as corresponding to the 48-pin variant. Thermal resistance is θ_JA = 81 °C/W (single-layer board) and 57 °C/W (four-layer board), per Table 8 of the datasheet.

Is the S9S08RN48W1MLH pin-compatible with other devices in the S08RN family?

Yes, the S9S08RN48W1MLH shares identical pinout and electrical characteristics with the S9S08RN60W1MLH and S9S08RN32W1MLH in the 48-pin LQFP configuration. All three variants use the same signal multiplexing scheme, I/O drive strengths, and peripheral mapping - enabling hardware reuse across flash-size variants. This compatibility is explicitly stated in Section 8 ("Pinout") and Section 2.3 ("Fields") of the S9S08RN60 Series Data Sheet Rev. 1.