MC9S08RD8CDWE-FR - 8MHz 8KB Flash 28-SOIC MCU | NXP
MPN: MC9S08RD8CDWE-FR ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.8908 | $1.89 |
| 10 | $1.8908 | $18.91 |
| 100 | $1.6939 | $169.39 |
| 500 | $1.6939 | $846.95 |
| 1,000 | $1.6939 | $1,693.90 |
MC9S08RD8CDWE-FR Overview
What is an 8-bit microcontroller? An 8-bit microcontroller is a compact embedded-control semiconductor that executes digital control logic, reads inputs, drives outputs, and manages peripherals on a single integrated circuit. The S08 family belongs to the microcontroller and embedded-processing hierarchy, combining a CPU core, memory, timers, communication interfaces, and interrupt control in one package.
The verified distributor data identifies the device as an S08 8-bit MCU operating at 8 MHz with 8 KB, or 8K x 8, of Flash memory. It is supplied in a 28-pin SOIC package. The -FR ordering suffix is associated with the listed NXP product offering, while detailed electrical limits, peripheral inventory, temperature grades, and pin names were not included in the provided source data and therefore require verification from the manufacturer datasheet before design release.
Typical embedded uses include basic industrial control, keypad and display interfaces, sensor conditioning, simple motor or relay control, and low-cost embedded products. Its 8-bit architecture is suitable when the application is dominated by digital I/O, control sequencing, and modest computation rather than high-throughput processing.
For PCB design, confirm the 28-SOIC footprint, pin assignments, voltage tolerances, oscillator requirements, programming interface, and decoupling recommendations against the official MC9S08RD8CDWE datasheet. The available verified data is sufficient to identify the core, speed, memory, package, and distributor listings, but not to establish a complete production specification set.
Drop-in alternatives for MC9S08RD8CDWE-FR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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MC9S08RD8CDWE
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S08RD8CDWE-FR Maximum Ratings & Electrical Characteristics
| Product Type | 8-bit microcontroller |
| Processor Series | S08 |
| Core Architecture | HCS08 |
| CPU Frequency | 8 MHz |
| Flash Memory | 8 KB (8K x 8) |
| Operating Supply Options | 2.5 V / 3.3 V |
| Package | 28-SOIC |
| Package Width | 7.50 mm |
| Mounting Type | Gull-wing surface mount |
| Terminal Count | 28 pins |
| Manufacturer | NXP Semiconductors |
| Original Product Family | Freescale Semiconductor S08 |
| Lead-Free Status | Lead free |
MC9S08RD8CDWE-FR 7.50 mm Pin Configuration Guide
Pin configuration for MC9S08RD8CDWE-FR (7.50 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 MC9S08RD8CDWE-FR.
Refer to the datasheet for full pin configuration.
Typical Applications
MC9S08RD8CDWE-FR is suitable for 6 applications: Basic Industrial Control, Keypad and Display Interface, Sensor Conditioning and Monitoring, Relay and Actuator Control, Consumer Appliance Control, Embedded Product Programming.
Basic Industrial Control
MC9S08RD8CDWE-FR fits compact control boards that read discrete inputs, operate relays, sequence actuators, and report status over a simple serial interface. Its verified 8-bit S08 core, 8 MHz clock, and 8 KB Flash provide enough program storage for basic control logic without requiring a high-performance processor. The 28-SOIC package also supports conventional surface-mount assembly. Before production use, verify the exact temperature grade, I/O limits, timers, communications, and ADC resources in the NXP datasheet, because those details were not included in the supplied listings.
Recommended
Keypad and Display Interface
The MC9S08RD8CDWE-FR can serve as the controller for a keypad, status display, indicator panel, or menu-driven embedded interface. An 8-bit MCU is appropriate when the design mainly scans inputs, debounces switches, updates display commands, and maintains deterministic control timing. The confirmed 8 MHz operating speed supports straightforward event-driven firmware, while 8 KB of Flash constrains application size. Exact LCD, keypad, SPI, UART, and timer pin assignments must be checked from the official datasheet because the provided web data does not identify the peripheral inventory.
Recommended
Sensor Conditioning and Monitoring
MC9S08RD8CDWE-FR is suitable for small sensor-monitoring products when the MCU must acquire digital or low-bandwidth measurements, apply calibration, and transmit results. Its 8-bit S08 architecture and 8 MHz clock are appropriate for basic thresholding, filtering, state tracking, and alarm handling. The supplied data confirms 2.5 V / 3.3 V operation but does not specify ADC resolution, input count, sampling rate, or analog limits. Those specifications must be verified before selecting it for analog sensor interfaces.
Recommended
Relay and Actuator Control
The MC9S08RD8CDWE-FR can control relays, solenoids, lamps, or other discrete actuators in a compact embedded product. Firmware can implement timing, interlocks, debounce logic, fault counters, and simple safety sequences using the 8-bit S08 processor. The 28-SOIC package provides a manageable assembly format for leaded-style surface-mount production. The verified data does not provide GPIO drive strength, output timing, or absolute maximum ratings, so relay-driver transistors, flyback protection, and pin loading require validation against the official electrical specifications.
Recommended
Consumer Appliance Control
MC9S08RD8CDWE-FR is applicable to low-cost appliance and embedded products that combine button input, status LEDs, a small display, and simple motor or load control. The 8 MHz S08 core offers a straightforward architecture for deterministic firmware, while 8 KB of Flash limits code and data density. A consumer design should confirm whether the -FR suffix corresponds to the intended temperature and sourcing requirements. The supplied data also lacks detailed brownout, ESD, EMC, and temperature information, so those requirements need separate engineering review.
Recommended
Embedded Product Programming
MC9S08RD8CDWE-FR can be used in a production embedded product where an 8-bit MCU controls a small state machine or peripheral subsystem. Its 8 KB Flash memory provides a defined code-storage capacity, and the 8 MHz CPU supports compact interrupt-driven designs. Programming and debugging connections are not documented in the supplied verified data, so engineers must obtain the official programming-test, reset, clock, and debug information before defining the manufacturing fixture. The 28-SOIC package is confirmed, but the individual pin functions are not.
Recommended
Recommended Products Summary
Engineering reference data for MC9S08RD8CDWE-FR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S08RD8CDWE |
|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors |
| Package | 28-SOIC | 28-SOIC |
| Processor | 8-bit S08 | 8-bit S08 |
| CPU Frequency | 8 MHz | 8 MHz |
| Flash Memory | 8 KB (8K x 8) | 8 KB (8K x 8) |
| Supply Options | 2.5 V / 3.3 V | 2.5 V / 3.3 V |
| Verified Price Reference | $1.8908 from LCSC | $1.6939 from Heisener |
Key Differentiators
- Exact -FR ordering identity (vs MC9S08RD8CDWE)
- Confirmed compact 28-SOIC package (vs MC9S08RD8CDWE)
- Defined embedded performance baseline (vs MC9S08RD8CDWE)
Design Notes
Start the layout with the confirmed 28-SOIC footprint, but do not route power, ground, programming, or peripheral signals until the official datasheet pinout is available. The verified data confirms the package family and pin count only. Verify pin 1 orientation, exposed connections if any, supply pins, ground pins, decoupling requirements, oscillator connections, and programming-test pins directly from the manufacturer documentation before fabrication.
Design the supply rail only after checking the exact -FR operating-voltage limits and I/O thresholds. The supplied listings mention 2.5 V / 3.3 V operation, but they do not provide minimum, typical, maximum, absolute maximum, or current-limit values. Select the regulator, bulk capacitance, local decoupling, and brownout behavior from the datasheet, and include appropriate filtering where switching supplies feed the MCU.
Do not treat the related MC9S08RD8CDWE listing as an automatic substitute for the -FR ordering code. Confirm the manufacturer ordering table, temperature grade, qualification status, package form, and lifecycle terms. Likewise, do not assume that a generic 8-bit MCU with 8 KB Flash is interchangeable; software, pin multiplexing, interrupt vectors, memory map, peripherals, and programming requirements can differ even when the package and headline memory values match.
Compliance Information
The verified Heisener and related distributor listings identify the device as lead free, but the supplied data does not explicitly establish RoHS, REACH, AEC-Q100, halogen-free, or conflict-minerals status. Verify these claims against the current NXP product documentation before procurement.
