MC9S08SF4MTG - 40MHz 8-Bit S08 MCU | NXP Semiconductors
MPN: MC9S08SF4MTG ✗ End of LifeMC9S08SF4MTG Overview
A microcontroller is a programmable semiconductor that combines a processor core, memory, timers, input/output ports, and communication peripherals on one integrated circuit. MC9S08SF4MTG belongs to the S08 8-bit microcontroller family and provides the deterministic control resources needed to read sensors, operate actuators, and manage embedded products. Its instruction set extends the HCS08 architecture with additional instructions.
The S08 family includes six timers and as many as 18 general-purpose input/output pins, supporting accurate timing, pulse generation, sensing, and motor-control sequencing. Depending on the selected device and package configuration, 13 I/O ports are identified for MC9S08SF4MTG. The 40 MHz CPU provides greater execution headroom for motor-control algorithms than slower 8-bit controllers while retaining a compact, low-power architecture.
The MC9S08SF4 MCU family is specifically optimized for precise and safe simple motor-control applications. Its combination of fast execution, dedicated timers, and broad GPIO access helps reduce software overhead in position, speed, or sequence-control systems. The 4 KB Flash capacity supports compact control firmware, while the 13 available I/O ports provide connections for sensors, switches, drivers, and status indicators.
Typical applications include small brushless DC motor controllers, stepper-motor sequencers, fan and pump controllers, appliance-control modules, and compact industrial automation boards. The 16-TSSOP package, 0.65 mm pitch, and 2.7 V to 5.5 V supply range make the device suitable for space-constrained control boards operating from either 3.3 V or 5 V system rails.
Designers should verify the exact pin assignments, peripheral routing, and programming requirements in the manufacturer datasheet before layout. Adequate decoupling, careful grounding, and separate routing of sensitive input signals remain essential for reliable motor-control behavior. This page also organizes lifecycle, application, replacement, and engineering information for faster component selection.
Drop-in alternatives for MC9S08SF4MTG — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
No drop-in alternatives available for this product.
Request AlternativesMC9S08SF4MTG Maximum Ratings & Electrical Characteristics
| CPU Architecture | 8-bit S08 Central Processor Unit |
| Maximum Clock Speed | 40 MHz |
| Program Memory | 4 KB Flash |
| Program Memory Organization | 4K x 8 |
| Operating Voltage Range | 2.7 V to 5.5 V |
| Nominal Logic Rails | 3.3 V and 5 V |
| GPIO Port Count | 13 ports |
| Maximum Family GPIO Count | 18 pins |
| Timer Count | 6 timers |
| Instruction Set | HCS08 instruction set with added instructions |
| Package | 16-pin TSSOP |
| Package Pitch | 0.65 mm |
| Package Width | 4.40 mm |
| Mounting Type | Surface Mount |
| Shipping Format | Tube |
| RoHS Status | Compliant |
| Lifecycle Status | End of Life |
| Primary Application | Simple motor control |
MC9S08SF4MTG 4.40 mm Pin Configuration Guide
Pin configuration for MC9S08SF4MTG (4.40 mm 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 MC9S08SF4MTG.
Refer to the datasheet for full pin configuration.
Typical Applications
MC9S08SF4MTG is suitable for 6 applications: Small Brushless DC Motor Controller, Stepper Motor Sequencer, Pump and Fan Controller, Appliance Control Module, Industrial Sensor Interface, Compact Sequence Controller.
Small Brushless DC Motor Controller
The MC9S08SF4MTG fits compact brushless DC motor controllers that require deterministic switching, direction sequencing, and protection handling in a small board area. Its 40 MHz 8-bit S08 CPU gives the firmware additional execution headroom for commutation logic, while six family timers support timing-sensitive control functions and 13 I/O ports provide connections for position sensors, Hall inputs, gate-driver signals, and status indication. Operating from 2.7 V to 5.5 V also allows the controller to use either 3.3 V or 5 V system rails. The design should isolate motor-current paths from the MCU ground and verify every timer channel and pin function against the selected motor-driver circuit.
Recommended
Stepper Motor Sequencer
MC9S08SF4MTG can implement step sequencing, direction control, travel limits, and simple position-feedback logic for small stepper-motor systems. The 40 MHz processor provides enough response time for precise pulse timing and fault handling, while the MC9S08SF4 family's six timers help organize step-rate generation and independent timebases. Thirteen I/O ports are available for step, direction, enable, limit-switch, and diagnostic functions. In a compact 16-TSSOP implementation, careful pin assignment is essential because external drivers, protection circuits, and connectors can consume several pins. Firmware should include acceleration limits and safe disable behavior for missed-command or sensor-error conditions.
Recommended
Pump and Fan Controller
The MC9S08SF4MTG is suitable for compact pump and fan controllers that combine speed commands with sensor monitoring and protective shutdown. Its six timers support periodic measurement, motor-drive timing, and configurable delay functions, while 13 I/O ports can connect command inputs, speed feedback, fault signals, and indicator outputs. The 4 KB Flash capacity is appropriate for a focused control program containing state logic and fault handling rather than a large user interface. A 3.3 V implementation can reduce system power and simplify integration with modern sensors, although motor-driver losses and supply transients must be controlled independently of the MCU rail.
Recommended
Appliance Control Module
MC9S08SF4MTG can serve as the central controller in a compact appliance module containing relays, indicators, user controls, and safety sensing. The 40 MHz S08 processor supports responsive state management, while the family timer resources allow periodic tasks, debouncing, and timing sequences. Thirteen I/O ports provide useful connectivity for buttons, level sensors, motor or relay commands, and diagnostic outputs. The 16-pin TSSOP package helps minimize board area, but designers should allocate pins carefully and add appropriate transistor or driver stages rather than driving loads directly. Firmware should validate sensor ranges and enforce safe outputs when conditions exceed the appliance's operating limits.
Recommended
Industrial Sensor Interface
The MC9S08SF4MTG can be used in a small industrial sensing module that reads switches, analog-control inputs, or digital sensors and converts them into controlled outputs. Its 2.7 V to 5.5 V operating range supports both legacy 5 V sensors and 3.3 V systems, while the 13 I/O ports allow multiple channels to be connected without moving to a larger package. Six timers support input sampling, debounce intervals, watchdog-style timing, and periodic reporting. For factory equipment, the complete assembly must address electrical transients, grounding, enclosure temperature, and functional isolation outside the MCU; the 2.7 V to 5.5 V specification alone does not establish suitability for harsh industrial environments.
Recommended
Compact Sequence Controller
MC9S08SF4MTG is appropriate for compact sequence controllers that coordinate a short series of actuators according to sensor inputs or operator commands. The 40 MHz CPU can execute the main control state machine and safety checks, while six timers support step duration, dead time, and event timing. Its 4 KB Flash capacity favors focused control firmware, and the 16-pin TSSOP package supports dense, low-cost assemblies. The system should define startup behavior, maximum sequence duration, and emergency-stop handling in firmware, while hardware interlocks handle conditions that must remain safe independently of the microcontroller. Because the device is end of life, new production designs should confirm lifecycle risk before committing the architecture.
Recommended
Engineering reference data for MC9S08SF4MTG — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product |
|---|---|
| Package | 16-pin TSSOP |
| Brand | NXP Semiconductors |
| CPU Architecture | 8-bit S08 |
| Maximum Clock Speed | 40 MHz |
| Program Memory | 4 KB Flash |
| Operating Voltage | 2.7 V to 5.5 V |
| GPIO Port Count | 13 ports |
| Timer Count | 6 timers |
| Lifecycle Status | End of Life |
Key Differentiators
- Purpose-built compact motor-control positioning (vs MC9S08SH4MTGR)
- Higher clock than an entry-level 8-bit controller class (vs C8051F020R)
- Compact 16-pin integration (vs MC9S08SG4E2MTGR)
- Dual 3.3 V and 5 V system compatibility (vs MC9S08QE4CTG)
Design Notes
Use the 16-pin TSSOP land pattern and pin assignments from the manufacturer datasheet without substituting a generic 16-pin footprint. Place input and output decoupling capacitors close to their associated device pins, provide a low-impedance ground reference, and keep switching-node and motor-current paths away from sensitive control traces. The 0.65 mm package pitch also makes assembly and inspection important, so verify soldermask, paste, and courtyard geometry against the selected manufacturing process.
Separate the quiet MCU ground path from high-current motor returns whenever the layout allows it. Connect analog and digital return paths at a controlled low-noise point, keep sensor traces short, and place any input filtering close to the relevant pins. Motor drivers can create fast current transitions on the board, so maintain compact power loops and use the PCB's available copper area for thermal spreading where the enclosure and current level permit it.
Do not treat the 2.7 V to 5.5 V MCU supply rating as permission to apply the maximum voltage at every peripheral or I/O pin. Check signal levels, pull-up values, injected current, and driver outputs against the electrical-characteristics tables. Also verify that the selected timer channels and peripheral functions map to the intended pins, because the S08 family's internal signal routing can constrain simultaneous motor-control functions even when enough nominal GPIO pins are listed.
Estimate the MCU rail's steady and transient demand before selecting the regulator and bypass network. The 40 MHz operating point and enabled peripherals determine actual current, while motor-driver switching can disturb the local supply even when the average load is modest. Use local high-frequency decoupling at the device and maintain a low-resistance return to the supply source. Any system power-loss or brownout behavior should be tested together with the motor's safe-stop requirements.
Estimate PCB junction temperature from the actual supply voltage, MCU current, and package thermal characteristics rather than relying on the 40 MHz clock alone. For an estimated calculation, use P_D approximately equal to (V_IN minus V_CORE) multiplied by I_SUPPLY, then apply the applicable package and board thermal-resistance estimate. State the ambient temperature and copper assumptions, and verify the result against the manufacturer's operating-temperature limits and motor-driver heat sources.
Compliance Information
The MC9S08SF4MTG listing identifies the 16-TSSOP device as RoHS compliant. No explicit REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statement was identified, so those fields remain unknown.