NXP Semiconductors MC9S08QD2VSC

Overview

MC9S08QD2VSC from NXP (formerly Freescale) is an 8-bit HCS08 microcontroller with 2048 bytes of flash, 128 bytes of RAM, and a 16 MHz CPU core. It integrates ADC10, two timer/PWM modules (TIM1 and TIM2), keyboard interrupt (KBI), internal clock source (ICS) with FLL, and background debug interface - designed for cost-sensitive embedded control in space-constrained applications such as small appliance motor control and sensor interface modules.

For engineers reviewing the MC9S08QD2VSC datasheet, MC9S08QD2VSC pinout, MC9S08QD2VSC application, or MC9S08QD2VSC equivalent, key selection criteria include its 8-pin SOIC package, single-wire BDM debug support, 4-channel 10-bit ADC with hardware trigger, low-power stop modes, and compatibility with legacy HCS08 toolchains and development environments.

Technical Context

The MC9S08QD2VSC implements the HCS08 CPU core with HC08 instruction set extension including BGND, supporting up to 32 interrupt/reset sources and single-wire background debugging. Its ICS module delivers precise clock generation via frequency-locked-loop (FLL) with internal reference trimmed to ±0.2% resolution and ±2% deviation over voltage and temperature.

Peripherals include a 4-channel 10-bit ADC with automatic compare, temperature sensor, and bandgap reference; TIM1 (2-channel) and TIM2 (1-channel) timers supporting input capture, output compare, and edge/center-aligned PWM; and a 4-pin KBI module with software-selectable edge/level sensitivity and internal pullups.

Key Specifications

Pinout & Package

MC9S08QD2VSC is housed in an 8-pin SOIC package (3.9 mm × 4.9 mm, 1.27 mm pitch), RoHS-compliant and rated for industrial temperature range (–40 °C to +105 °C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08QD2VSC, MC9S08QG4CDTE offers more memory but demands layout changes, while S9S08QD2F1VSC provides identical functionality with automotive qualification - making it the only true functional and pin-compatible alternative for industrial designs needing AEC-Q100 compliance.

Availability

MC9S08QD2VSC is available at Aetrix Electronics and suitable for small-appliance motor control, industrial sensor nodes, LED lighting dimmers, and consumer remote control interfaces requiring stable component supply and long-term production continuity.

Supply support for MC9S08QD2VSC 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 MC9S08QD2VSC belongs to the HCS08 family - engineered for ultra-low-cost, space-constrained embedded control where minimal BOM, single-wire debug, and integrated analog peripherals reduce system complexity.

FAQ

What is the maximum operating frequency of the MC9S08QD2VSC?

The MC9S08QD2VSC features an HCS08 CPU core capable of running at up to 16 MHz. This frequency is achieved using the internal clock source (ICS) with frequency-locked-loop (FLL) and internal reference trimming. The actual bus frequency depends on ICS configuration, but the core executes instructions at this rate under full-speed conditions with appropriate voltage and temperature margins.

Does the MC9S08QD2VSC support in-circuit debugging?

Yes, the MC9S08QD2VSC supports single-wire background debug (BDM) via the BKGD/MS pin. This allows full in-circuit programming, real-time register inspection, and breakpoint setting during development - eliminating the need for external debug probes or dedicated JTAG headers. The on-chip debug module supports one active breakpoint plus two additional breakpoints managed by the debug host.

What are the power supply requirements for the MC9S08QD2VSC?

The MC9S08QD2VSC operates from a single supply rail between 2.7 V and 5.5 V. It includes built-in low-voltage detection (LVD) that can generate either a reset or interrupt when VDD falls below a user-programmable threshold. The device draws less than 1 µA in Stop3 mode, making it suitable for battery-powered applications where standby current is critical.

How many analog input channels does the MC9S08QD2VSC ADC support?

The MC9S08QD2VSC integrates a 10-bit analog-to-digital converter (ADC) with four selectable input channels (AD0–AD3). It also includes an internal temperature sensor and bandgap reference channel, enabling self-calibration and environmental monitoring without external components. Conversion can be triggered automatically by the RTI counter for deterministic timing.

Is the MC9S08QD2VSC pin-compatible with other members of the QD series?

The MC9S08QD2VSC shares the same 8-pin SOIC package and pinout with MC9S08QD4VSC and S9S08QD2F1VSC. All three devices use identical VDD, VSS, RESET, BKGD/MS, and PTA0–PTA5 assignments. However, flash size (2 KB vs. 4 KB) and qualification grade (industrial vs. automotive) differ - firmware and qualification requirements must be verified per application.