NXP Semiconductors S9S08SG32E1MTJR

Overview

S9S08SG32E1MTJR from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller with 32 KB 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 ambient temperature, and targets automotive body electronics, industrial control, and appliance MCU applications.

For engineers reviewing the S9S08SG32E1MTJR datasheet, S9S08SG32E1MTJR pinout, S9S08SG32E1MTJR application, or S9S08SG32E1MTJR equivalent, key selection criteria include its 28-pin TSSOP package, on-chip background debug interface, low-voltage detection with interrupt capability, flash block protection, and support for stop3 mode with RTC and ADC active.

Technical Context

The S9S08SG32E1MTJR implements the HCS08 CPU core with HC08 instruction set compatibility and BGND instruction support. It integrates an Internal Clock Source (ICS) module featuring a frequency-locked loop (FLL) with precision-trimmed internal reference (±0.2% resolution), enabling bus frequencies from 2 MHz to 20 MHz across voltage and temperature.

Peripherals include a 16-channel 10-bit ADC with 2.5 µs conversion time and internal temperature sensor, two 2-channel TPM modules supporting input capture/output compare/PWM, and a real-time counter (RTC) with free-running 1 kHz low-power oscillator usable in all MCU modes including stop3.

Key Specifications

Pinout & Package

Package: 28-pin Thin Shrink Small Outline Package (TSSOP), 4.4 mm × 9.7 mm body, 0.65 mm pitch, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S9S08SG32E1MTJR, the MC9S08SG48E1MTJR offers scalable code density without layout changes, while the S9S08SG16E1MTJR provides direct cost reduction for simpler applications-both maintain identical peripheral functionality, debug interface, and environmental qualification.

Availability

S9S08SG32E1MTJR is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, and home appliance motor control requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for S9S08SG32E1MTJR 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 S9S08SG32E1MTJR belongs to NXP's legacy HCS08 microcontroller family, designed specifically for cost-sensitive, low-power embedded control applications in automotive and industrial environments where robustness, debuggability, and AEC-Q100 compliance are essential.

FAQ

What is the maximum operating temperature range for the S9S08SG32E1MTJR?

The S9S08SG32E1MTJR is rated for operation from -40°C to +125°C ambient temperature and is qualified to AEC-Q100 Grade 2 standards. This specification is verified across full voltage range (2.7–5.5 V) and applies to all core functions, Flash programming/erase, ADC, RTC, and peripheral operation-including stop3 mode with active RTC and ADC. The device supports high-temperature variants up to +150°C under specific ordering codes not applicable to S9S08SG32E1MTJR.

Does the S9S08SG32E1MTJR support in-circuit debugging?

Yes, the S9S08SG32E1MTJR includes a single-wire background debug (BDM) interface compliant with Freescale/NXP BDM protocol. It supports real-time register inspection, memory read/write, breakpoint setting (one hardware breakpoint plus two more via on-chip debug module), and full in-circuit emulation using the integrated ICE module with 8-deep FIFO and nine trigger modes. No external JTAG adapter is required-only a standard BDM pod or compatible debugger such as PE Micro Cyclone or Segger J-Link with BDM firmware.

Can the S9S08SG32E1MTJR operate in low-power modes with the ADC active?

Yes, the S9S08SG32E1MTJR supports ADC operation in stop3 mode-the deepest low-power state where the CPU, Flash, and most peripherals are disabled but the RTC, ADC, and ACMP remain functional. In this mode, the ADC can perform conversions triggered by RTC overflow or external events, enabling battery-operated wake-up sensing without full system wake-up. Conversion results are stored in registers accessible upon exit from stop3, preserving energy efficiency.

What clock sources are available on the S9S08SG32E1MTJR?

The S9S08SG32E1MTJR provides multiple clock sources: an internal ICS module with FLL and precision-trimmed RC oscillator (enabling 2–20 MHz bus frequencies), an external crystal or ceramic resonator via XTAL/EXTAL pins (31.25 kHz–16 MHz), and a dedicated 1 kHz low-power RTC oscillator that runs independently in all modes including stop3. The ICS supports automatic failover and trimming calibration, and the RTC oscillator requires no external components.

Is the S9S08SG32E1MTJR pin-compatible with other members of the MC9S08SGxx family?

Yes, the S9S08SG32E1MTJR in 28-TSSOP package is pin-compatible with MC9S08SG16E1MTJR and MC9S08SG48E1MTJR-same pin count, identical pin functions, and shared mechanical footprint. This allows direct substitution within the same package variant for memory-scaling decisions without PCB revision. However, pin compatibility does not extend to 16-TSSOP or 20-TSSOP variants, which have different pinouts and reduced I/O counts.