NXP Semiconductors S9S08QD4J1VSC

Overview

S9S08QD4J1VSC from NXP Semiconductors is an 8-bit HCS08 microcontroller with 16 MHz CPU, 4 KB Flash, 256 B RAM, and integrated ADC, dual timers (TIM1/TIM2), KBI, and ICS clock module. It operates across –40 °C to 105 °C and targets low-cost automotive body electronics and industrial control nodes requiring single-wire debug and robust power management.

For engineers reviewing the S9S08QD4J1VSC datasheet, S9S08QD4J1VSC pinout, S9S08QD4J1VSC application, or S9S08QD4J1VSC equivalent, key selection criteria include its 8-pin SOIC package, 10-bit 4-channel ADC with hardware trigger, internal FLL-based clock with ±2% accuracy over voltage/temperature, and support for Wait + three Stop modes including Stop3 with RTI wake-up capability.

Technical Context

The S9S08QD4J1VSC implements the HCS08 CPU core with BGND instruction and background debugging system enabling single-wire in-circuit debug with one active breakpoint plus two additional breakpoints in the on-chip debug module. It supports up to 32 interrupt/reset sources and uses a unified memory map with flash block protection and security features.

Its ICS module integrates a frequency-locked loop (FLL) with precision-trimmed internal reference (0.2% resolution, ±2% deviation over temperature/voltage), delivering stable bus clocks without external crystals. The ADC10V1 includes asynchronous clocking, automatic compare, temperature sensor, and bandgap reference - all hardware-triggerable via the RTI counter.

Key Specifications

Pinout & Package

Package: 8-pin SOIC (Small Outline Integrated Circuit), RoHS compliant, footprint compatible with industry-standard 8-pin SOIC layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08QD4CPBE and S9S08QD2J1VSC, the S9S08QD4J1VSC provides automotive-grade temperature operation (–40 °C to 105 °C), larger memory headroom, and identical 8-pin SOIC footprint - making it optimal for production automotive modules where reliability, debug access, and thermal margin are critical.

Availability

S9S08QD4J1VSC is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, smart appliance interfaces, and LED lighting control systems requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned qualification.

Supply support for S9S08QD4J1VSC 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, and IoT applications, with deep expertise in microcontrollers, RF, and analog technologies.

The S9S08QD4J1VSC belongs to the HCS08 QD-series - a family of cost-optimized, low-pin-count MCUs designed specifically for automotive body electronics and industrial control where small size, debug accessibility, and robust power management are essential.

FAQ

What is the operating temperature range of the S9S08QD4J1VSC?

The S9S08QD4J1VSC is qualified for operation from –40 °C to +105 °C, meeting automotive under-hood and cabin module requirements. This extended temperature range is confirmed in the official NXP MC9S08QD4 Series Data Sheet Rev. 7 and distinguishes it from commercial variants like the MC9S08QD4CPBE, which is rated only to +85 °C. The S9S08QD4J1VSC maintains full functionality across this range, including Flash programming and ADC accuracy.

Does the S9S08QD4J1VSC support in-circuit debugging?

Yes, the S9S08QD4J1VSC supports single-wire background debug (BDM) via the BKGD/MS pin, enabling full in-circuit programming, breakpoint setting, and register inspection without halting system operation. It implements the HCS08 background debug system with one active breakpoint plus two additional breakpoints in the on-chip debug module - all accessible using standard NXP BDM tools and compatible third-party debug probes.

What are the Flash and RAM sizes of the S9S08QD4J1VSC?

The S9S08QD4J1VSC contains 4096 bytes of on-chip Flash memory and 256 bytes of RAM. These values are explicitly specified in the NXP MC9S08QD4 Series Data Sheet Rev. 7 under the "Memory" section and apply uniquely to the S9S08QD4 and MC9S08QD4 part numbers - distinguishing them from the S9S08QD2 variant, which has only 2048 bytes of Flash and 128 bytes of RAM.

Which peripherals are integrated into the S9S08QD4J1VSC?

The S9S08QD4J1VSC integrates a 10-bit 4-channel ADC with hardware trigger (RTI), two timer/PWM modules (TIM1 with 2 channels, TIM2 with 1 channel), a 4-pin keyboard interrupt (KBI) module, internal clock source (ICS) with FLL, real-time interrupt (RTI), COP watchdog, and low-voltage detection (LVD). All peripherals are documented in the MC9S08QD4 Series Data Sheet Rev. 7 and operate within the device's 8-pin SOIC constraint.

Is the S9S08QD4J1VSC pin-compatible with other QD-series MCUs?

Yes, the S9S08QD4J1VSC shares identical pinout and electrical characteristics with the MC9S08QD4CPBE (PDIP) and S9S08QD2J1VSC (same SOIC package), as confirmed in the "Device Pin Assignment" chapter of the MC9S08QD4 Series Data Sheet Rev. 7. This enables direct substitution between S9S08QD4J1VSC and S9S08QD2J1VSC on the same PCB layout, provided firmware accommodates the reduced memory size of the latter.