NXP Semiconductors S9S08QD2J1CSC

Overview

S9S08QD2J1CSC from NXP Semiconductors is an 8-bit HCS08 microcontroller designed for cost-sensitive embedded control applications. It features a 16 MHz CPU, 2048 bytes of on-chip Flash memory, 128 bytes of RAM, and integrated peripherals including a 4-channel 10-bit ADC, two timer/PWM modules (TIM1 and TIM2), and a 4-pin keyboard interrupt module. It operates in automotive-grade temperature range (–40 °C to 125 °C) and targets low-power sensor interface and motor control functions.

For engineers reviewing the S9S08QD2J1CSC datasheet, S9S08QD2J1CSC pinout, S9S08QD2J1CSC application, or S9S08QD2J1CSC equivalent, key selection criteria include Flash/RAM size, ICS-based clock accuracy (±2% over voltage/temperature), single-wire BDM debug support, and 8-pin SOIC packaging for space-constrained PCBs.

Technical Context

The S9S08QD2J1CSC implements the HCS08 CPU core with HC08 instruction set extension (including BGND), supporting up to 32 interrupt/reset sources and background debugging via single-wire BDM interface. Its Internal Clock Source (ICS) uses a frequency-locked loop (FLL) with factory-trimmed internal reference for ±0.2% resolution and ±2% deviation across full operating conditions.

Peripherals are tightly coupled to the CPU: the 10-bit ADC supports hardware triggering by RTI counter and includes internal bandgap reference and temperature sensor; TIM1 provides two independent channels for input capture, output compare, or edge/center-aligned PWM; TIM2 adds one additional channel with identical functionality.

Key Specifications

Pinout & Package

Package: 8-pin SOIC (Small Outline Integrated Circuit), body width 3.9 mm, lead pitch 1.27 mm, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S9S08QD2J1CSC, MC9S08QD2CDT trades automotive qualification and SOIC compatibility for through-hole ease-of-use, while S9S08QD4J1CSC offers direct scalability in memory without changing layout or firmware architecture.

Availability

S9S08QD2J1CSC is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, and consumer appliance control systems requiring stable component supply and long-term lifecycle support.

Supply support for S9S08QD2J1CSC 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 headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.

The S9S08QD2J1CSC belongs to the HCS08 QD-series microcontrollers, designed specifically for cost-optimized, low-power embedded control in automotive subsystems and industrial equipment where reliability and qualification to AEC-Q100 Grade 1 are essential.

FAQ

What is the maximum operating frequency of the S9S08QD2J1CSC CPU core?

The S9S08QD2J1CSC features an HCS08 CPU core with a maximum bus frequency of 16 MHz. This frequency is derived from the internal clock source (ICS) module's FLL output, which is factory-trimmed for stability across voltage and temperature. The actual achievable instruction throughput depends on code density and wait states, but the core supports full-speed execution at 16 MHz under rated VDD (2.7–5.5 V) and temperature (–40 °C to +125 °C). S9S08QD2J1CSC does not require external crystals for basic operation due to its integrated ICS.

Does the S9S08QD2J1CSC support in-circuit debugging, and what interface is used?

Yes, the S9S08QD2J1CSC supports in-circuit debugging via a single-wire Background Debug Mode (BDM) interface using the BKGD/MS pin. This allows full visibility into CPU registers, memory, and peripheral states during development without halting real-time operation. The BDM module supports one hardware breakpoint and two additional breakpoints managed by the on-chip debug module. S9S08QD2J1CSC requires no external debug probe beyond standard BDM-capable programmers such as the NXP DEMO9S08QD4 evaluation board or compatible third-party tools.

What are the memory resources available on the S9S08QD2J1CSC?

The S9S08QD2J1CSC integrates 2048 bytes of on-chip Flash memory for program storage and 128 bytes of RAM for runtime data. Flash supports read/program/erase operations across the full operating voltage (2.7–5.5 V) and temperature (–40 °C to +125 °C) range, with hardware block protection to prevent accidental overwrite. RAM is volatile and retained only in Run, Wait, and Stop3 modes. S9S08QD2J1CSC does not include EEPROM or external memory interfaces - all code and data must reside within these on-chip resources.

Can the S9S08QD2J1CSC operate without an external crystal or resonator?

Yes, the S9S08QD2J1CSC can operate fully without external timing components. Its Internal Clock Source (ICS) module includes a frequency-locked loop (FLL) driven by a factory-trimmed internal reference oscillator, enabling stable 16 MHz bus operation. External crystals are optional and only required if higher frequency accuracy (e.g., <±0.5%) or specific clock domain separation is needed. S9S08QD2J1CSC's ICS achieves ±2% deviation over temperature and voltage, making it suitable for most automotive and industrial control tasks where precise timing is not mission-critical.

Is the S9S08QD2J1CSC qualified for automotive applications?

Yes, the S9S08QD2J1CSC is qualified to AEC-Q100 Grade 1 (–40 °C to +125 °C) and is explicitly designated for automotive use in NXP documentation. Its datasheet covers S9S08QD2 variants alongside MC9S08QD2 and confirms qualification for engine bay–adjacent and cabin control applications. Features such as low-voltage detection, COP watchdog with dedicated 32 kHz clock, flash block protection, and robust I/O drive strength align with automotive functional safety expectations. S9S08QD2J1CSC is not intended for safety-critical ASIL-B/D systems but meets requirements for non-safety-critical body and convenience electronics.