MC9S08QD2MPC - 8-bit S08 MCU, 2KB Flash, 16MHz | NXP DIP-8
MPN: MC9S08QD2MPC ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.95 | $2.95 |
| 10 | $2.65 | $26.50 |
| 100 | $2.1 | $210.00 |
| 500 | $1.78 | $890.00 |
| 1,000 | $1.49 | $1,490.00 |
MC9S08QD2MPC Overview
An 8-bit microcontroller (MCU) is a self-contained processor integrating a CPU, non-volatile program memory, RAM, and peripheral blocks on a single silicon die. The HCS08 core implements the classic HC08 instruction set with extensions such as BGND (background debug) and a single hardware breakpoint, providing a familiar, deterministic Von-Neumann architecture for embedded developers. Within the broader semiconductor taxonomy, an 8-bit MCU sits beneath 32-bit Cortex-M devices in capability and complexity, but remains highly competitive where deterministic GPIO, low cost, and minimal external parts dominate the design trade-off.
Key features of the MC9S08QD2MPC include an integrated 4-channel 10-bit ADC for analog sensor acquisition, an internal clock source that eliminates the need for an external crystal in many designs, a robust watchdog timer with a dedicated internal oscillator for fail-safe operation, and six general-purpose I/O pins multiplexed with peripheral functions. The Flash memory supports in-application programming and in-circuit programming via the background debug mode (BDM), enabling field upgrades and simplified prototyping without removing the part from the board.
On the architecture side, the S08QD family uses a CISC-style HC08 instruction set with bus speeds up to 16MHz (some variants specify 8MHz bus) and integrates a 2KB Flash array with security-lock bits to protect firmware IP. The device operates across 2.7V to 5.5V, supporting both 3.3V and 5V system rails, and includes an on-chip voltage regulator with brown-out reset to simplify power-tree design. The 8-pin PDIP package features a generous pin pitch that is friendly to hand prototyping and through-hole assembly in low-volume production.
Typical applications include consumer appliance controllers, battery chargers, simple sensor interfaces, low-end motor and lamp controls, replacement of legacy HC08 and HC05 designs, and white-goods user-interface panels where only a handful of I/O pins and a small amount of program memory are required. The combination of internal clock, watchdog, and ADC typically reduces the bill of materials to just the MCU plus a bypass capacitor and a connector.
When designing with the MC9S08QD2MPC, engineers should provide a 0.1uF decoupling capacitor as close to VDD/VSS as possible and may add bulk capacitance at the board supply input. Unused I/O pins should be configured as outputs or tied to defined logic levels to minimize supply current. BDM debug access requires the BKGD pin routed to a programming header for in-circuit firmware updates.
Drop-in alternatives for MC9S08QD2MPC — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MC9S08QD2MPC (same form factor and footprint) — differing in Package, Core Processor, Instruction Set, Supply Voltage, RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC9S08QD4CSC
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View Datasheet →MC9S08QG4CFFE
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View Datasheet →MC9S08QG8CFFE
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View Datasheet →MC9S08QG84CFFE
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View Datasheet →MC908KX2CPE
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View Datasheet →MC9S08QD2MPC Maximum Ratings & Electrical Characteristics
| Core | HCS08 (S08QD family) |
| Data Bus Width | 8 bit |
| Instruction Set | HC08 with BGND extension |
| Program Memory | 2 KB Flash |
| RAM | 128 bytes |
| Maximum CPU Frequency | 16 MHz |
| Supply Voltage | 2.7 V to 5.5 V |
| ADC | 4-channel, 10-bit |
| General-Purpose I/O | 6 pins |
| Watchdog | Yes (COP with dedicated internal oscillator) |
| Debug Interface | Background Debug Mode (BDM) |
| Internal Clock | Yes (internal oscillator, no external crystal required) |
| Package | 8-pin PDIP (DIP-8) |
| Mounting Type | Through-Hole |
| Operating Temperature | -40 C to +85 C |
| Packaging | Tube |
| RoHS Status | Compliant |
| Lead-Free | Yes |
MC9S08QD2MPC Pin Configuration
| Pin 1 | VSS — Ground reference |
| Pin 2 | BKGD/MS — Background Debug Mode / Mode Select |
| Pin 3 | PTB5/AD5 — General-purpose I/O / ADC channel 5 |
| Pin 4 | PTB4/AD4 — General-purpose I/O / ADC channel 4 |
| Pin 5 | PTB3/AD3 — General-purpose I/O / ADC channel 3 |
| Pin 6 | VDD — Supply voltage (2.7V to 5.5V) |
| Pin 7 | PTB2/AD2 — General-purpose I/O / ADC channel 2 |
| Pin 8 | PTA3/AD1/RESET — General-purpose I/O / ADC channel 1 / Reset input |
Typical Applications
MC9S08QD2MPC is suitable for 6 applications: Consumer Appliance Control, Battery Charger Controllers, Simple Sensor Interfaces, White Goods User Interface Panels, Legacy HC08 / HC05 Firmware Migration, Hobbyist and Educational Hardware.
Consumer Appliance Control
The MC9S08QD2MPC's 8-pin PDIP footprint, integrated 4-channel 10-bit ADC, and 2.7V-5.5V supply range make it a strong fit for low-cost appliance sub-modules such as coffee makers, blenders, and rice cookers. With 2KB of Flash it can run simple cooking profiles, while the integrated watchdog timer keeps the appliance fail-safe under power-line transients. Estimated firmware footprint of under 2KB comfortably fits typical state-machine cooking logic in this NXP part.
Recommended
Battery Charger Controllers
For simple 2-cell to 6-cell NiMH or single-cell Li-ion chargers the MC9S08QD2MPC is well suited thanks to its 10-bit ADC with four channels for voltage and current telemetry and its low internal oscillator drift tolerance. The HCS08 core's deterministic interrupt latency lets it manage PWM-style charging phases accurately without external timers. The 8-PDIP package simplifies hand-build charger prototypes and educational hardware designs using this NXP MCU.
Recommended
Simple Sensor Interfaces
The MC9S08QD2MPC excels at sensor-hub roles where a small MCU reads analog signals, debounces switches, and forwards processed data via a UART or GPIO. The 4-channel 10-bit ADC allows simultaneous voltage, current, temperature, and user-input sampling without external multiplexers. With 128 bytes of RAM the device easily buffers a few sensor samples; flash-locked firmware protects proprietary calibration values in this NXP part.
Recommended
White Goods User Interface Panels
In washing machine or dishwasher front panels the MC9S08QD2MPC drives LED indicators, scans a 4x4 key matrix through its limited GPIO plus ADC channels, and reports status via a single-wire interface to the main board. Its 2.7V-5.5V supply compatibility with 3.3V and 5V backlight drivers cuts level shifters out of the BOM. The internal watchdog COP protects panel operation from firmware lock-ups.
Recommended
Legacy HC08 / HC05 Firmware Migration
Engineers migrating older HC05 designs to the modern HCS08 instruction set benefit from the MC9S08QD2MPC's HC08-source compatibility, integrated peripherals, and in-circuit BDM debug. The 8-pin PDIP footprint remains identical to classic HC05 parts, enabling PCB reuse without layout changes. Migration accelerates because most HC05 assembly tools translate to HC08 with minimal manual intervention, leveraging NXP's S08QD silicon.
Recommended
Hobbyist and Educational Hardware
The MC9S08QD2MPC's through-hole 8-pin PDIP design makes it ideal for breadboards, solderless prototyping kits, and university embedded-systems labs. The BGM debug port connects to low-cost PE Micro or OpenSDA probes for in-circuit programming and live breakpoints. With 6 general-purpose I/O pins students can experiment with switches, LEDs, and basic serial protocols without soldering fine-pitch SMD parts, taking advantage of NXP's educational ecosystem.
Recommended
Recommended Products Summary
Engineering reference data for MC9S08QD2MPC — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S08QD4CSC | MC9S08QG4CFFE | MC9S08QG8CFFE | MC9S08QG84CFFE | MC908KX2CPE |
|---|---|---|---|---|---|---|
| Package | 8-PDIP (DIP-8) | 8-PDIP-compatible (same family) | 8-PDIP (S08QG family) | 8-PDIP (S08QG family) | 8-PDIP (S08QG family) | 8-PDIP (legacy HC08) |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core | HCS08 (S08QD) | HCS08 (S08QD) | HCS08 (S08QG) | HCS08 (S08QG) | HCS08 (S08QG) | HC08 (legacy) |
| Flash Memory | 2 KB | 4 KB | 4 KB | 8 KB | 8 KB | 2 KB |
| RAM | 128 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 128 bytes |
| Maximum CPU Frequency | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 8-16 MHz |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 2.7 V to 5.5 V |
| ADC | 4-channel, 10-bit | 4-channel, 10-bit | 8-channel, 10-bit | 8-channel, 10-bit | 8-channel, 10-bit | No ADC |
| Watchdog | Yes (COP) | Yes (COP) | Yes (COP) | Yes (COP) | Yes (COP) | Yes (COP) |
Key Differentiators
- Lowest-cost entry into S08 family (vs MC9S08QD4CSC)
- Integrated 4-channel 10-bit ADC (vs MC908KX2CPE)
- Industrial -40C to +85C operating range (vs MC9S08QG4CFFE)
Design Notes
Place a 0.1uF X7R ceramic decoupling capacitor as close as possible to VDD (pin 6) and VSS (pin 1). Add a bulk capacitor of 1uF to 10uF at the board supply input to handle inrush from GPIO switching. The MC9S08QD2MPC's internal voltage regulator and brown-out reset block at about 1.9V so the supply rail must remain above this threshold; use the LVD threshold register to detect voltage drops early.
Route the BKGD/MS pin (pin 2) directly to a 2x5 or 2x3 header for background debug mode programming, keeping the trace short and away from noisy power traces. The 8-PDIP package's wide 2.54mm pin pitch allows through-hole assembly without via fan-outs - keep all signal traces on one side to simplify hand rework during prototype bring-up.
The MC9S08QD2MPC shares its PTA3 pin between GPIO and RESET - this dual function must be configured correctly during initialization or the part will appear 'bricked' on power-up. Estimated: if firmware unintentionally drives RESET low after boot, the BDM interface can still recover the part, but production boards must ensure no contention. Add a 10kohm pull-up to VDD on PTA3 to default the MCU to run mode.
Compliance Information
RoHS-compliant per NXP product page. AEC-Q100 not applicable - this is a general-purpose industrial MCU, not automotive-qualified; for AEC-Q100 S08 options consult NXP's automotive line. Halogen-free status not explicitly stated on the verified product page.
