NXP Semiconductors MC9S08QD2CSC

Overview

MC9S08QD2CSC from NXP Semiconductors is an 8-bit HCS08 microcontroller with 16 MHz CPU, 2048 bytes of flash memory, 128 bytes of RAM, and integrated ADC, dual timers (TIM1/TIM2), keyboard interrupt (KBI), and internal clock source (ICS). It operates in industrial temperature range (–40 °C to 125 °C) and targets low-pin-count embedded control in cost-sensitive applications such as appliance motor interfaces and sensor signal conditioning.

For engineers reviewing the MC9S08QD2CSC datasheet, MC9S08QD2CSC pinout, MC9S08QD2CSC application, or MC9S08QD2CSC equivalent, this page delivers verified technical context, package-specific I/O mapping, real-world peripheral use cases, and validated alternative options for design continuity and sourcing resilience.

Technical Context

The MC9S08QD2CSC implements the HCS08 CPU core with HC08 instruction set extension (including BGND), background debugging support via single-wire BDM interface, and up to 32 interrupt/reset sources. Its ICS module provides FLL-based clock generation with ±2% accuracy over voltage and temperature using factory-trimmed internal reference.

Peripherals include a 4-channel 10-bit ADC with hardware trigger from RTI, two independent timer modules (TIM1: 2-channel; TIM2: 1-channel) supporting input capture, output compare, and edge/center-aligned PWM, plus a 4-pin keyboard interrupt module with software-selectable edge/level sensitivity and internal pullups.

Key Specifications

Pinout & Package

MC9S08QD2CSC is housed in an 8-pin SOIC package (SOIC-8, 150 mil width), RoHS-compliant, with 4 general-purpose I/O pins, 1 input-only (IRQ), 1 output-only (RESET), and dedicated BKGD/MS debug pin.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08QD2CSC, MC9S08QD4CSC offers double flash capacity for complex control logic, while S9S08QD2F1ACSK adds automotive qualification and ESD hardening - both retain identical peripherals, pinout, and firmware binary compatibility.

Availability

MC9S08QD2CSC is available at Aetrix Electronics and suitable for appliance motor control, industrial sensor nodes, automotive body electronics, and consumer keypad interfaces requiring stable component supply and long-term lifecycle support.

Supply support for MC9S08QD2CSC 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.

The MC9S08QD2CSC belongs to the HCS08 QD-series - designed specifically for ultra-low-cost, low-pin-count embedded control in space- and power-constrained environments.

FAQ

What is the maximum operating frequency of the MC9S08QD2CSC CPU?

The MC9S08QD2CSC features an HCS08 CPU core rated for up to 16 MHz operation. This frequency is achieved using the internal clock source (ICS) with FLL enabled and properly configured bus dividers. The 16 MHz clock drives instruction execution, peripheral timing, and interrupt response - enabling sub-microsecond task scheduling in real-time control loops.

Does the MC9S08QD2CSC support in-circuit debugging?

Yes, the MC9S08QD2CSC supports single-wire background debug mode (BDM) via the BKGD/MS pin. This interface allows full read/write memory access, breakpoint setting (one active breakpoint plus two in debug module), and real-time register inspection without halting system operation - essential for validating timing-critical firmware during development.

What are the ADC capabilities of the MC9S08QD2CSC?

The MC9S08QD2CSC integrates a 4-channel, 10-bit successive-approximation ADC with internal bandgap reference, temperature sensor channel, and automatic compare function. Conversions can be triggered by software, RTI overflow, or external events - enabling precise analog monitoring for thermal protection, supply voltage supervision, and sensor signal conditioning.

Can the MC9S08QD2CSC operate from a single supply voltage?

Yes, the MC9S08QD2CSC operates from a single 2.7–5.5 V supply (VDD) with internal voltage regulation. It includes low-voltage detect (LVD) circuitry that generates reset or interrupt when VDD drops below programmable thresholds - ensuring reliable operation across battery discharge curves and unregulated wall adapters.

Is the MC9S08QD2CSC pin-compatible with other devices in the QD series?

Yes, the MC9S08QD2CSC in SOIC-8 package shares identical pinout with MC9S08QD4CSC and S9S08QD2 variants. All share the same VDD/VSS placement, I/O mapping (PTA0–PTA3), RESET/BKGD/MS assignments, and peripheral signal routing - enabling hardware reuse across flash-size and qualification-tier variants.