NXP Semiconductors S9S08SG32E1WTGR

Overview

S9S08SG32E1WTGR from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller with 32 KB on-chip FLASH, 2 KB RAM, and integrated peripherals including 10-bit ADC, dual TPM timers, SCI, SPI, I²C, ACMP, and RTC. It operates at up to 40 MHz bus frequency, supports -40°C to +125°C temperature range, and targets automotive body electronics and industrial control applications.

For engineers reviewing the S9S08SG32E1WTGR datasheet, S9S08SG32E1WTGR pinout, S9S08SG32E1WTGR application, or S9S08SG32E1WTGR equivalent, key selection criteria include its 28-pin TSSOP package, single-wire BDM debug interface, stop3 mode operation with ADC/ACMP active, internal clock source (ICS) with ±1.5% accuracy over temperature, and AEC-Q100 Grade 2 qualification.

Technical Context

The S9S08SG32E1WTGR implements the HCS08 CPU core with HC08 instruction set extension, supporting up to 32 interrupt/reset sources and BGND instruction for background debugging. Its memory subsystem includes 32 KB FLASH with block protection, 2 KB RAM, and nonvolatile option registers (NVOPT, NVFTRIM) for system configuration.

Peripherals are tightly coupled to low-power operation: the RTC runs on a dedicated 1 kHz internal oscillator in all modes; ADC and ACMP remain functional in stop3; and the ICS module provides bus frequencies from 2–20 MHz using FLL with internal or external reference, trimmed to 0.2% resolution.

Key Specifications

Pinout & Package

28-pin Thin Shrink Small Outline Package (TSSOP), thermally enhanced with exposed pad (not electrically connected). Pinout conforms to MC9S08SG32 Series standard layout per Rev. 8 datasheet Figure 2-1 and Section 2.1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S9S08SG32E1WTGR, the S9S08SG48E1WTGR provides direct FLASH capacity headroom within identical hardware and software constraints, while the MKE02Z32VLC2 represents a platform shift toward ARM-based development with trade-offs in legacy code reuse and debug infrastructure.

Availability

S9S08SG32E1WTGR is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor control, smart lighting nodes, and appliance control panels requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for S9S08SG32E1WTGR 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 company formed from the spin-off of Philips' semiconductor division, now specializing in secure connectivity solutions for automotive, industrial, and IoT markets.

The S9S08SG32E1WTGR belongs to the HCS08 microcontroller family, designed specifically for cost-sensitive, high-reliability embedded applications in automotive body electronics and industrial control where deterministic real-time response and extended temperature operation are critical.

FAQ

What is the maximum bus frequency supported by the S9S08SG32E1WTGR?

The S9S08SG32E1WTGR supports a maximum bus frequency of 40 MHz at temperatures from –40°C to +125°C. At temperatures above +125°C, the maximum bus frequency is derated to 36 MHz to maintain timing integrity and reliability. This specification is guaranteed per the electrical characteristics table in Rev. 8 of the MC9S08SG32 datasheet and applies directly to the S9S08SG32E1WTGR variant.

Does the S9S08SG32E1WTGR support AEC-Q100 qualification?

Yes, the S9S08SG32E1WTGR is AEC-Q100 Grade 2 qualified, meaning it is certified for operation from –40°C to +105°C ambient (junction up to +125°C) in automotive applications. This qualification is documented in the "Electrical Characteristics" chapter of the MC9S08SG32 Rev. 8 datasheet, specifically in Table A-9 (ICS specifications) and associated footnotes referencing AEC Grade 0 and Grade 2 test conditions.

Can the S9S08SG32E1WTGR operate in ultra-low-power stop modes with analog peripherals active?

Yes, the S9S08SG32E1WTGR supports stop3 mode, in which the RTC, ADC, and ACMP remain fully operational while CPU and most clocks are halted. This enables wake-up on analog events (e.g., comparator threshold crossing or ADC conversion complete) with typical current consumption below 1 µA. The capability is explicitly confirmed in Chapter 3.6.1 ("Stop3 Mode") and Chapter 9 ("ADC") of the MC9S08SG32 Rev. 8 datasheet.

What debug interface does the S9S08SG32E1WTGR use, and what capabilities does it provide?

The S9S08SG32E1WTGR uses a single-wire background debug (BDM) interface via the BKGD/MS pin. It supports in-circuit debugging with breakpoint setting, on-chip emulation (ICE) featuring two comparators and nine trigger modes, and an eight-deep FIFO for flow tracking. These features are detailed in Chapter 17 ("Development Support") of the MC9S08SG32 Rev. 8 datasheet and apply identically to the S9S08SG32E1WTGR.

Is the S9S08SG32E1WTGR pin-compatible with other members of the MC9S08SGxx family?

Yes, the S9S08SG32E1WTGR in 28-pin TSSOP is pin-compatible with the S9S08SG48E1WTGR and S9S08SG16E1WTGR in the same package variant. All share identical pin assignments, electrical characteristics, and peripheral mapping per the MC9S08SG32 Rev. 8 datasheet Section 2.1 and Figure 2-1. This allows hardware reuse across FLASH size variants without PCB modification.