NXP Semiconductors S9S08SG32E1WTG

Overview

S9S08SG32E1WTG 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, industrial sensors, and appliance control.

For engineers reviewing the S9S08SG32E1WTG datasheet, S9S08SG32E1WTG pinout, S9S08SG32E1WTG application, or S9S08SG32E1WTG equivalent, key selection criteria include Flash endurance (100k erase/write cycles), stop3-mode operation with RTC/ADC/ACMP active, internal clock source trimming accuracy (±1.5% over -40°C to 125°C), and TSSOP-28 package compatibility with legacy MC9S08SG designs.

Technical Context

The S9S08SG32E1WTG implements the HCS08 CPU core with BGND instruction support and handles up to 32 interrupt/reset sources. Its Internal Clock Source (ICS) uses a frequency-locked loop (FLL) with precision-trimmed internal reference, enabling stable 2–20 MHz bus frequencies without external crystal in cost-sensitive applications.

Peripherals are tightly integrated with low-power operation: ADC (16-channel, 10-bit, 2.5 µs conversion) and ACMP remain functional in stop3 mode; RTC runs continuously on a dedicated 1 kHz internal oscillator; and single-wire background debug enables in-circuit programming and breakpoint debugging without dedicated debug pins.

Key Specifications

Pinout & Package

Package: 28-pin Thin Shrink Small Outline Package (TSSOP), 4.4 mm × 9.7 mm body, 0.65 mm pitch, JEDEC MO-153 compliant. Thermal resistance: 72 °C/W (single-layer board, 200 ft/min airflow).

Key Features

Applications

Equivalent & Alternatives

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

Compared with S9S08SG32E1WTG, MC9S08SG48E1WTG offers direct pin-compatible Flash expansion, while S9KEAZ128AMLH provides architectural uplift to ARM Cortex-M0+-making the former ideal for incremental upgrades and the latter suited for next-generation feature-rich platforms.

Availability

S9S08SG32E1WTG is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, and smart appliance control requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.

Supply support for S9S08SG32E1WTG 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, mobile, and communication infrastructure markets.

The S9S08SG32E1WTG belongs to NXP's legacy HCS08 microcontroller family, designed specifically for cost-sensitive, low-power embedded control in automotive and industrial environments where reliability, small footprint, and minimal external components are critical.

FAQ

What is the maximum operating temperature specification for the S9S08SG32E1WTG?

The S9S08SG32E1WTG is rated for operation from -40°C to +125°C ambient temperature and is qualified to AEC-Q100 Grade 2 standards. This rating applies across the full 2.7–5.5 V supply range and includes guaranteed functionality of all peripherals-including ADC, ACMP, RTC, and TPM-in stop3 mode at the upper limit. The device does not support the +150°C HT grade variant.

Does the S9S08SG32E1WTG support in-system programming via its single-wire debug interface?

Yes, the S9S08SG32E1WTG supports full in-system programming and debugging through the BKGD/MS pin using the single-wire background debug protocol. This allows flash programming, register read/write, breakpoint setting, and real-time execution control without requiring a dedicated debug header or external JTAG adapter-reducing PCB area and BOM cost.

Can the internal 10-bit ADC in the S9S08SG32E1WTG operate during low-power stop modes?

Yes, the S9S08SG32E1WTG's 10-bit ADC remains fully functional in stop3 mode, enabling periodic sensor sampling without waking the CPU. Conversion results trigger interrupts or DMA transfers, and the internal temperature sensor and bandgap reference remain calibrated and usable-critical for battery-operated monitoring applications requiring µA-level sleep current.

What clock sources are available for the S9S08SG32E1WTG, and how accurate is the internal option?

The S9S08SG32E1WTG supports external crystal/resonator (31.25 kHz–16 MHz) and internal ICS with FLL. The ICS achieves ±1.5% frequency accuracy over -40°C to +125°C after factory trimming-sufficient for UART communication, PWM generation, and non-precision timing tasks without external components.

Is the S9S08SG32E1WTG pin-compatible with earlier MC9S08SG32 variants like the MC9S08SG32CPB?

Yes, the S9S08SG32E1WTG shares identical pinout, electrical characteristics, and memory map with legacy MC9S08SG32 devices in TSSOP-28 packaging-including MC9S08SG32CPB. Firmware and hardware designs are directly interchangeable, though users must verify Flash security settings and ICS trim values match target application requirements.