NXP Semiconductors S9S08RNA16W2MTG

Overview

S9S08RNA16W2MTG from NXP Semiconductors (formerly Freescale) is an automotive-grade 8-bit S08 microcontroller with 16 KB flash, 256-byte EEPROM with ECC, and 2 KB RAM, operating at up to 20 MHz bus frequency across –40 °C to 125 °C. It integrates ADC (10-bit, 8-channel), dual SCI/UART, SPI, I²C, FTM timers, TSI touch sensing, and low-voltage detection - deployed in engine control modules, body electronics, and HVAC actuators.

For engineers reviewing the S9S08RNA16W2MTG datasheet, S9S08RNA16W2MTG pinout, S9S08RNA16W2MTG application, or S9S08RNA16W2MTG equivalent, this page delivers verified technical context, package-specific pin mapping, real-world use-value per application, and two validated alternative parts for functional migration - all grounded in Rev 1 (02/2014) S9S08RN16DS documentation.

Technical Context

The S9S08RNA16W2MTG implements an S08 CPU core with four-level nested interrupt support and up to 40 interrupt/reset sources. Its clock system combines a Pierce external oscillator (XOSC) and an internal clock source (ICS) with FLL, enabling precise 1–20 MHz operation with ±2% DCO deviation over –40 °C to 125 °C.

System protection includes independent watchdog, programmable low-voltage detect (LVD) with four warning levels, illegal opcode/address reset, and flash/RAM access protection. Debug is enabled via single-wire background debug interface (BDM) with three breakpoints and on-chip ICE module supporting nine trigger modes.

Key Specifications

Pinout & Package

16-pin Thin Shrink Small Outline Package (TSSOP), surface-mount, 0.65 mm pitch, JEDEC MO-153 compliant. Thermal resistance θ_JA = 130 °C/W (single-layer board), 87 °C/W (four-layer board).

Key Features

Applications

Equivalent & Alternatives

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

Compared with S9S08RNA16W2MTG, MC9S08RN16W2MTG offers identical functionality under legacy branding, while S9S08RN8W2MTG reduces memory resources without altering I/O, timing, or environmental capability - enabling scalable platform design across entry and mid-tier automotive modules.

Availability

S9S08RNA16W2MTG is available at Aetrix Electronics and suitable for engine control units, body electronics modules, and HVAC actuator controllers requiring stable component supply across automotive production lifecycles.

Supply support for S9S08RNA16W2MTG 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, and IoT applications, with deep heritage in microcontroller innovation dating to the Motorola and Freescale eras.

The S9S08RN series was designed specifically for cost-optimized, high-reliability automotive body and powertrain control applications demanding extended temperature operation, robust EMC performance, and long-term supply stability.

FAQ

What is the maximum bus frequency supported by the S9S08RNA16W2MTG?

The S9S08RNA16W2MTG 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 via the internal clock source (ICS) with frequency-locked loop (FLL), which can be driven by either the internal trimmed reference or an external crystal/resonator. The 20 MHz limit applies to both FEI and FBE operating modes.

Does the S9S08RNA16W2MTG support EEPROM wear leveling or automatic erase management?

The S9S08RNA16W2MTG does not include hardware wear leveling or automatic erase management. Its 256-byte EEPROM uses 2-byte erase sectors and supports program/erase while executing code from flash, but endurance (100k cycles) and data retention (10 years) require firmware-level management. Users must implement software logic to distribute writes across sectors and track erase counts - no built-in controller handles this autonomously.

Can the S9S08RNA16W2MTG operate in stop mode while maintaining ADC or TSI functionality?

Yes, the S9S08RNA16W2MTG supports ADC and TSI operation in Stop3 mode. In Stop3, the 1 kHz low-power oscillator (LPO) remains active, enabling the ADC to perform conversions and the TSI module to scan up to 16 electrodes - both capable of generating interrupts to wake the MCU. The datasheet specifies +40 µA ADC adder and +121 µA TSI adder to baseline Stop3 current (4.6 µA), confirming active peripheral operation during low-power states.

What are the key thermal limitations for the S9S08RNA16W2MTG in a 16-pin TSSOP package?

The S9S08RNA16W2MTG in 16-pin TSSOP has a junction-to-ambient thermal resistance (θ_JA) of 130 °C/W on a single-layer board and 87 °C/W on a four-layer board. Its maximum junction temperature is 135 °C, and ambient operating range is –40 °C to 125 °C. To avoid thermal shutdown, total power dissipation (P_D = I_DD × V_DD + P_I/O) must satisfy T_J = T_A + (P_D × θ_JA) ≤ 135 °C - e.g., at 125 °C ambient and 5 V, max allowable P_D is ~77 mW on single-layer layout.

Is the S9S08RNA16W2MTG pin-compatible with other members of the S9S08RN family?

The S9S08RNA16W2MTG is pin-compatible with the S9S08RN8W2MTG (8 KB flash variant) in the same 16-pin TSSOP package, sharing identical pin assignments, electrical characteristics, and peripheral mapping. However, it is not pin-compatible with 20-pin, 32-pin, or 48-pin variants (e.g., S9S08RN16W2MLF) due to differing pin counts and signal multiplexing - package-specific pinouts must be verified per device marking.