NXP Semiconductors S9S08SG4E2MTG

Overview

S9S08SG4E2MTG from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller with 4 KB flash, 256 B RAM, and integrated ADC, ACMP, SCI, SPI, I²C, TPM, RTC, and background debug interface. It operates at up to 40 MHz CPU frequency, supports stop3 low-power mode, and targets automotive body electronics and industrial control applications requiring extended temperature operation.

For engineers reviewing the S9S08SG4E2MTG datasheet, S9S08SG4E2MTG pinout, S9S08SG4E2MTG application, or S9S08SG4E2MTG equivalent, key selection criteria include its 16-TSSOP package, -40°C to 125°C operating range, 10-bit 12-channel ADC with temperature sensor, internal clock source with ±1.5% FLL accuracy over temperature, and single-wire BDM debug support.

Technical Context

The S9S08SG4E2MTG implements the HCS08 CPU core with HC08 instruction set plus BGND, supporting up to 32 interrupt/reset sources. Its internal clock source (ICS) uses a frequency-locked loop (FLL) trimmed for ±1.5% deviation from –40°C to 125°C, enabling bus frequencies from 2 MHz to 20 MHz without external crystal.

Peripherals include a 10-bit ADC with 2.5 µs conversion time and automatic compare, a 5-V analog comparator with edge-selectable interrupt and bandgap reference, and two 2-channel TPM modules supporting input capture, output compare, and PWM. All operate in stop3 mode, enabling ultra-low-power wake-up capability.

Key Specifications

Pinout & Package

Package: 16-pin Thin Shrink Small Outline Package (TSSOP), 4.4 mm × 5.0 mm body, 0.65 mm pitch, lead-free and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08SG8CDT and S9S08SG32E2MTJ, the S9S08SG4E2MTG delivers the minimal viable feature set for cost-sensitive, thermally demanding embedded control - retaining full peripheral compatibility and stop3 operation while reducing flash footprint and package size.

Availability

S9S08SG4E2MTG is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, smart appliance control units, and low-power HVAC thermostats requiring stable component supply across extended temperature ranges.

Supply support for S9S08SG4E2MTG 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 S9S08SG4E2MTG belongs to the HCS08 SG-series microcontrollers, designed specifically for cost-optimized, thermally robust embedded control in automotive and industrial environments where reliability under extended temperature and low-power operation are critical.

FAQ

What is the maximum operating frequency of the S9S08SG4E2MTG CPU core?

The S9S08SG4E2MTG CPU core operates at up to 40 MHz at temperatures ≤125°C. At higher ambient temperatures (up to 125°C), the maximum guaranteed frequency is 36 MHz per the device's electrical specifications. This derating ensures stable execution under thermal stress without requiring external clock adjustment - the internal ICS automatically maintains bus timing within specification.

Does the S9S08SG4E2MTG support debugging in-circuit without additional hardware?

Yes, the S9S08SG4E2MTG integrates a single-wire background debug (BDM) interface that enables full in-circuit debugging using only the BKGD pin and ground. No external JTAG adapter or debug probe is required - standard BDM tools like P&E Multilink or OpenSDA-based debuggers connect directly. The S9S08SG4E2MTG also includes an on-chip ICE module with two comparators and eight-deep FIFO for trace capture.

Can the S9S08SG4E2MTG ADC operate while the MCU is in stop3 mode?

Yes, the S9S08SG4E2MTG ADC remains fully functional in stop3 mode. It supports hardware-triggered conversions using the real-time counter (RTC) or external events, and its automatic compare function can generate interrupts to wake the CPU. This capability allows precise, low-power sensor sampling - for example, reading the integrated temperature sensor every 500 ms without exiting stop3.

What is the purpose of the separate VDDAD and VSSAD pins on the S9S08SG4E2MTG?

The S9S08SG4E2MTG provides dedicated analog supply (VDDAD) and ground (VSSAD) pins to isolate noise-sensitive analog circuitry - including the 10-bit ADC and 5-V analog comparator - from digital switching noise. Routing these pins to a clean analog power domain improves measurement accuracy and reduces quantization error, especially critical when using the internal temperature sensor or bandgap reference channel.

Is the S9S08SG4E2MTG pin-compatible with other members of the HCS08 SG-series?

The S9S08SG4E2MTG in 16-TSSOP is pin-compatible with the MC9S08SG8CDT (8 KB flash) and MC9S08SG16CDT (16 KB flash) in the same package. However, it is not pin-compatible with 20-TSSOP variants like S9S08SG32E2MTJ. Pin compatibility is limited to devices sharing identical pin count, physical layout, and signal mapping - verified in Section 2.1 of the MC9S08SG8 Rev. 8 datasheet covering the SG4/SG8/SG16 family.