MC9S08RE16FG - 8-Bit 16KB Flash MCU | NXP | 44-LQFP
MPN: MC9S08RE16FG ✓ ActiveMC9S08RE16FG Overview
An 8-bit microcontroller is a programmable semiconductor containing a processor core, memory, peripherals, and input/output circuitry on one integrated circuit. Within the embedded-device hierarchy, the MC9S08RE16FG belongs to the S08 family of microcontrollers and sits below the broader categories of embedded processors and semiconductor control devices. Its 8-bit architecture is suited to monitoring digital inputs, controlling discrete outputs, communicating through serial peripherals, and coordinating compact sensor or actuator modules.
The principal device characteristics visible for this part include 16 KB of built-in Flash memory, 1 KB of RAM, an 8 MHz maximum clock, and operation from 1.8 V to 3.6 V. The commercial-grade ordering information identifies a 0 °C to 70 °C ambient-temperature range for MC9S08RE16FG. These specifications make the device appropriate for consumer appliances, industrial control modules, instrumentation, and embedded systems where a low-voltage controller can handle logic-level sensors and actuators.
The S08 architecture provides a compact platform for embedded control rather than a high-performance computing solution. Flash memory retains programmed code when power is removed, while the 1 KB RAM supports working variables, stack operations, buffers, and peripheral data handling. An 8 MHz operating frequency provides a defined timing basis for deterministic control tasks, although final performance depends on the selected peripherals, code organization, interrupt structure, and external circuitry.
Typical applications include digital thermometers, small environmental-monitoring nodes, appliance controllers, keypad interfaces, motor-control supervisory circuits, and compact industrial interface modules. The 1.8 V to 3.6 V supply range permits integration with low-voltage logic systems, while the 44-LQFP package provides enough pins for multiple digital interfaces and selected analog or control functions.
Designers should verify the complete pin assignment, peripheral configuration, clock requirements, decoupling recommendations, and programming procedure in the MC9S08RE16 datasheet before layout release. Pay particular attention to the 10 mm by 10 mm footprint, exposed thermal and supply connections, available I/O voltage domains, and the startup behavior of any external crystal or timing components.
This product record combines the verified ordering characteristics with practical guidance for component selection, PCB implementation, power planning, and system integration. It also distinguishes confirmed electrical and packaging facts from parameters that require direct confirmation from the manufacturer datasheet, helping engineers shorten component-evaluation and hardware bring-up cycles.
Drop-in alternatives for MC9S08RE16FG — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
MC9S08RE16CG
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MC9S08RE16AG
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MC9S08RE16FG Maximum Ratings & Electrical Characteristics
| Product Type | 8-bit S08 microcontroller |
| Maximum Clock Frequency | 8 MHz |
| Program Memory | 16 KB Flash |
| Flash Organization | 16K x 8 bits |
| RAM | 1 KB |
| Operating Voltage Range | 1.8 V to 3.6 V |
| Ambient Operating Temperature | 0 °C to 70 °C |
| Architecture | 8-bit |
| Package | 44-LQFP, 10 mm x 10 mm |
| Mounting Type | Surface mount |
| Program Memory Type | Built-in Flash |
MC9S08RE16FG 44-lqfp, 10 mm x 10 mm Pin Configuration Guide
Pin configuration for MC9S08RE16FG (44-lqfp, 10 mm x 10 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 MC9S08RE16FG.
Refer to the datasheet for full pin configuration.
Typical Applications
MC9S08RE16FG is suitable for 6 applications: Environmental Monitoring Node, Appliance Control Module, Digital Thermometer, Industrial Interface and Data Logger, Battery-Powered Sensor Hub, Keypad and Status Interface.
Environmental Monitoring Node
The MC9S08RE16FG fits a compact environmental-monitoring node because its 16 KB Flash can hold acquisition, filtering, threshold, and communication firmware, while 1 KB of RAM supports working state and measurement buffers. Operating from 1.8 V to 3.6 V permits integration with low-voltage sensors and 3.3 V digital interfaces. An 8 MHz S08 core can service periodic sensor reads, debounce inputs, update indicators, and transmit results through an available serial peripheral. Use the family datasheet to confirm the required ADC channels and I/O mapping, and budget the layout for local supply decoupling and low-power operation.
Recommended
Appliance Control Module
The MC9S08RE16FG is appropriate for a compact appliance controller that must coordinate switches, indicators, sensors, and a user interface. Its 16 KB of Flash provides sufficient space for a structured state machine and device-specific logic, and the 1 KB RAM can hold configuration values, counters, and serial buffers. The 1.8 V to 3.6 V operating range supports compact low-voltage logic designs, while the 44-LQFP package offers more I/O opportunities than a small-outline MCU. Verify relay-driver isolation, reset behavior, and power-loss requirements in the system schematic.
Recommended
Digital Thermometer
The MC9S08RE16FG can serve as the control center of a digital thermometer by acquiring a temperature signal, applying calibration and filtering, driving a display, and responding to user inputs. The 8 MHz operating frequency supports regular sampling without requiring a high-power processor, and 16 KB of Flash leaves room for conversion routines, calibration tables, and display formatting. Its 1.8 V to 3.6 V supply range is compatible with low-voltage sensor and display architectures. Confirm ADC resolution, reference accuracy, and pin multiplexing in the MC9S08RE16 datasheet before assigning the sensor input.
Recommended
Industrial Interface and Data Logger
For a compact industrial interface or data logger, the MC9S08RE16FG provides an 8-bit control core, 16 KB Flash, 1 KB RAM, and a 44-pin package with ample external connections. Firmware can capture digital events, timestamp samples, maintain a rolling buffer, and forward records through a serial link. The 0 °C to 70 °C ordering grade supports ordinary commercial environments, while the 1.8 V to 3.6 V range simplifies integration into low-voltage control boards. Design protection, isolation, and wider-temperature requirements separately because those requirements are not addressed by the basic controller package.
Recommended
Battery-Powered Sensor Hub
The MC9S08RE16FG can coordinate a battery-powered sensor hub when the system is designed around low-voltage logic and periodic sensing. Its 1.8 V minimum operating voltage supports common low-energy architectures, while 16 KB of Flash can hold compact drivers and 1 KB of RAM can maintain short-term observations between activity periods. The S08 platform is more appropriate for straightforward acquisition and control than for demanding edge analytics. Check the exact low-power modes, active current, and clock-startup behavior in the manufacturer documentation before estimating battery life.
Recommended
Keypad and Status Interface
The MC9S08RE16FG is well suited to a keypad, display, and status-indicator interface because an 8-bit S08 processor can scan inputs, debounce contacts, update outputs, and manage simple menus with limited memory. Its 16 KB Flash is appropriate for fixed control logic and 1 KB RAM is sufficient for short key histories or display buffers in a modest design. The 44-LQFP package provides more pins than the smallest S08 options, which can simplify direct LED and switch connections. Confirm debounce-capable pins and any multiplexed display requirements before assigning the board netlist.
Recommended
Recommended Products Summary
Engineering reference data for MC9S08RE16FG — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S08RE16CG | MC9S08RE16AG |
|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 44-LQFP (10 mm x 10 mm) | 44-LQFP (10 mm x 10 mm) | 44-LQFP (10 mm x 10 mm) |
| Architecture | 8-bit | 8-bit | 8-bit |
| Maximum Clock Frequency | 8 MHz | 8 MHz | 8 MHz |
| Flash Program Memory | 16 KB | 16 KB | 16 KB |
| RAM | 1 KB | 1 KB | 1 KB |
| Operating Voltage Range | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| Program Memory Type | Built-in Flash | Built-in Flash | Built-in Flash |
Key Differentiators
- Exact core-memory and clock match (vs MC9S08RE16CG)
- Pin-compatible family option (vs MC9S08RE16AG)
- Compact integrated memory (vs MC9S08QE4CTG)
Design Notes
Create the footprint from the manufacturer drawing for the 44-LQFP, 10 mm by 10 mm package rather than from the generic QFP-44 dimensions. Confirm pin-1 orientation, the exposed thermal connection, lead pitch, courtyard, and solder-mask clearance. Place the input and output decoupling capacitors close to their corresponding power pins, and route high-current return paths over continuous ground copper to minimize supply disturbance.
The MC9S08RE16FG operates from 1.8 V to 3.6 V, but every peripheral and signal connected to the controller must tolerate the selected rail. Check input thresholds, pull-up levels, I/O drive limits, and any mixed-voltage interface before assigning pins. Use the datasheet's recommended capacitance and ESR requirements for bypass capacitors, and evaluate startup current against the source supply's ramp and current-limit behavior.
Assign analog-sensitive and communication-related pins only after reviewing the MC9S08RE16 pin table and alternate-function matrix. Keep switching nodes, inductors, and fast digital return currents away from sensor inputs and external clock circuitry. Route oscillator and reset signals away from noisy power stages, use short return paths for bypassing, and maintain a quiet reference area around sensitive analog components to reduce coupling into the controller.
Do not substitute an S08 device solely because its memory size or package pin count is similar. The firmware can depend on peripheral placement, interrupt vectors, clock behavior, and specific pin multiplexing. For a replacement, compare the complete pin table, power pins, reset and debug connections, Flash and RAM capacity, clock limits, supply range, temperature grade, and package drawing before treating the alternative as a true drop-in replacement.
Compliance Information
The device is a commercial-temperature 8-bit microcontroller, but no RoHS, REACH, lead-free, halogen-free, or conflict-minerals declaration was identified. The commercial ordering grade does not imply AEC-Q100 qualification.
