MC9S08QG8MDNE - 20MHz 8-bit Flash MCU | NXP Semiconductors
MPN: MC9S08QG8MDNE ✓ Active| Qty | Unit Price | Extended |
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| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
MC9S08QG8MDNE Overview
What is an 8-bit microcontroller? An 8-bit microcontroller is a compact embedded-processing component that executes instructions using an 8-bit data path and combines a CPU core, program memory, data memory, I/O, and peripherals in one package. MC9S08QG8MDNE belongs to the S08 8-bit MCU family, a low-power architecture suited to battery-powered devices, control panels, simple sensing systems, and cost-sensitive embedded products.
The main engineering features are a 20 MHz clock speed, 8 KB Flash program storage, six I/O ports, and operation from 1.8 V to 3.6 V. Flash memory allows firmware to be programmed and updated without a separate external memory device. The SOIC-8 package also provides a small surface-mount footprint, while the 20 MHz CPU supports deterministic control tasks in modest embedded systems.
The verified product information identifies the part as part of the S08QG family, whose devices provide serial interfaces and other peripherals for compact embedded designs. The part is listed with HC08 instruction-set compatibility and an added BGND instruction, plus a background debugging system with breakpoint capability. Those debugging features help developers inspect firmware behavior without relying on a full external debug interface.
Typical applications include low-cost consumer controls, battery-operated accessories, small industrial interface modules, sensor-conditioning nodes, and simple motor or actuator controllers. The 8-bit architecture is most appropriate when the application does not require large memory capacity, high arithmetic throughput, or a high-pin-count peripheral arrangement.
Designers should confirm the exact pin functions, peripheral availability, programming method, and electrical limits against the manufacturer datasheet before layout release. SOIC-8 routing must preserve the package pin numbering and provide adequate decoupling near the device. Because the available verified data does not state a current distributor price or lead time, purchasing decisions should use a quotation or live distributor check.
This page consolidates verified distributor specifications, lifecycle information, package details, application guidance, and replacement considerations. It separates confirmed data from unavailable parameters so engineers can make a traceable component-selection decision without relying on unverified assumptions.
Drop-in alternatives for MC9S08QG8MDNE — 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 MC9S08QG8MDNE (same form factor and footprint) — differing in Package, RoHS Status, Mounting Type, Product Type, ADC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC9S08QG8CDNE
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →MC9S08QG4CDNE
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →MC9S08QG8MFQE
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S08QG8CPBE
✅ Drop-In✓ In Stock
$2.46 / Unit
View Datasheet →MC9S08QG8CFFER
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S08QG8MDNE Maximum Ratings & Electrical Characteristics
| Product Type | 8-bit S08 microcontroller |
| CPU Clock Speed | 20 MHz |
| Program Memory | 8 KB Flash |
| Memory Organization | 8K x 8 bits |
| Supply Voltage Range | 1.8 V to 3.6 V |
| I/O Ports | 6 |
| Package | 8-pin SOIC, MS-012AA |
| Package Type | SOIC-8 |
| Terminal Count | 8 |
| Architecture | HCS08 with HC08 instruction set and added BGND instruction |
| Debug Support | Background debugging system with breakpoint capability |
| Process Technology | CMOS |
| RoHS Status | RoHS compliant |
MC9S08QG8MDNE soic-8 Pin Configuration Guide
Pin configuration for MC9S08QG8MDNE (soic-8 package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for MC9S08QG8MDNE.
Refer to the datasheet for full pin configuration.
Typical Applications
MC9S08QG8MDNE is suitable for 6 applications: Battery-Powered Sensor Node, Industrial Control Panel, Battery-Powered Remote Control, Simple Motor or Actuator Controller, LED Indicator and Keypad Controller, Embedded Educational or Prototype Controller.
Battery-Powered Sensor Node
MC9S08QG8MDNE fits a small battery-powered sensor node when the product needs local control logic but not a high-performance processor. Its 20 MHz S08 CPU can execute acquisition, filtering, threshold, and actuator-control routines, while 8 KB of Flash provides room for compact firmware. The 1.8 V to 3.6 V operating range also supports low-voltage power architectures. The design should use the family’s low-power capabilities, but measured current consumption must be obtained from the manufacturer datasheet because no verified sleep or active-current figures were supplied.
Recommended
Industrial Control Panel
MC9S08QG8MDNE can serve as the control MCU for a compact industrial interface with buttons, indicators, relays, and status inputs. The 20 MHz HCS08 core provides deterministic digital control, and the six I/O ports cover basic panel signaling and discrete sensing. Its SOIC-8 package simplifies assembly compared with larger leaded packages, although the limited pin count may require an I/O expander. Industrial qualification details and operating-temperature limits are not present in the verified data and must be confirmed before deployment.
Recommended
Battery-Powered Remote Control
MC9S08QG8MDNE is appropriate for a battery-powered remote or accessory controller where the required firmware fits within 8 KB of Flash and the design uses a small number of digital inputs and outputs. The MCU can manage button debouncing, state logic, indicator control, and low-rate communication. A 20 MHz clock provides useful response margin for simple protocols, while the 1.8 V minimum supply supports low-energy designs. Wireless transceiver selection, current consumption, and regulatory compliance are outside the verified data and require separate engineering review.
Recommended
Simple Motor or Actuator Controller
MC9S08QG8MDNE can control small motors, solenoids, or relays when the application uses discrete drivers and relatively modest timing requirements. The 20 MHz S08 core can execute position, speed, timeout, and fault-management logic, while the six I/O ports provide the interface to driver circuitry. The controller must add appropriate transistor, flyback, current-limiting, and protection components; the MCU itself does not replace the power stage. Verify maximum I/O levels and timing in the exact datasheet before connecting inductive loads.
Recommended
LED Indicator and Keypad Controller
MC9S08QG8MDNE is well suited to a compact keypad, display indicator, or menu-control module because the device combines an 8-bit control core, Flash program storage, and six I/O ports in an 8-pin package. Firmware can scan switches, debounce inputs, drive LEDs, and manage simple status sequences. The SOIC-8 footprint helps minimize board size, but the pin budget may limit direct LED or display connections. An I/O expander or transistor driver may be needed depending on the number of indicators and their drive current.
Recommended
Embedded Educational or Prototype Controller
MC9S08QG8MDNE provides a compact platform for learning embedded-system fundamentals, firmware development, background debugging, and low-voltage control. The 20 MHz S08 processor, 8 KB Flash memory, and six I/O ports are sufficient for introductory projects involving digital inputs, timing, simple serial communication, and actuator control. The background debugging system with breakpoint capability can make firmware inspection more accessible. Developers should use the official programming and debug documentation rather than relying on distributor summaries for pinout or tool-specific details.
Recommended
Recommended Products Summary
Engineering reference data for MC9S08QG8MDNE — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S08QG8CDNE | MC9S08QG4CDNE | MC9S08QG8MFQE |
|---|---|---|---|---|
| Package | SOIC-8 | SOIC-8 candidate | SOIC-8 candidate | SOIC-8 candidate |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| CPU Architecture | 8-bit HCS08 S08 | 8-bit S08QG family candidate | 8-bit S08 family candidate | 8-bit 20 MHz NXP MCU |
Key Differentiators
- Confirmed 8-bit S08 positioning (vs Larger 16-bit or 32-bit MCU systems)
- 20 MHz verified clock specification (vs MC9S08QG8MFQE)
- 8 KB Flash memory (vs MC9S08QG4CDNE)
- Low-voltage SOIC-8 integration (vs Larger-pin-count S08 controllers)
Design Notes
Design the supply around the verified 1.8 V to 3.6 V operating range, while checking every pin-specific voltage limit in the manufacturer datasheet. Place the required bypass capacitor close to the device power pin and keep the return path short. Estimated: if the MCU rail current is I and the supply is 3.3 V, the regulator must provide I plus transient margin; the exact capacitor value and regulator selection cannot be finalized without the verified current and datasheet requirements.
Use an SOIC-8 land pattern that matches the manufacturer package drawing, verify pin 1 orientation, and preserve clearances for programming or debugging access. Because the verified snippets do not provide the complete pin map, do not finalize routing from distributor summaries alone. Cross-check the final schematic against the exact NXP datasheet, especially reset, ground, supply, and any programming or clock pins.
Do not assume that another S08-family MCU is interchangeable merely because its name is similar. Confirm package dimensions, pin functions, Flash capacity, voltage limits, reset behavior, and programming configuration. The cross-reference search surfaced several S08 variants, but the supplied data does not verify that they are pin-to-pin replacements for MC9S08QG8MDNE; mark any substitution as provisional until the manufacturer comparison is completed.
Keep sensitive clock and programming routes short, provide a continuous ground reference beneath the MCU where the package permits, and place external support components according to the manufacturer’s recommended application circuit. For systems with long cables or noisy actuators, separate switching-current paths from low-level control traces and use protection appropriate to the actual interface. The verified data does not specify internal oscillator or communication-routing details, so those points must be checked in the full datasheet.
Compliance Information
RoHS compliance is stated in the verified component data. REACH, AEC-Q100, lead-free status, halogen-free status, and conflict-minerals status are not provided and remain unknown.
