MC9S08RD32DWE - 8-Bit 8MHz 32KB MCU | NXP | SOIC-28
MPN: MC9S08RD32DWE ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.9053 | $1.91 |
| 10 | $1.9053 | $19.05 |
| 100 | $1.9053 | $190.53 |
| 500 | $1.9053 | $952.65 |
| 1,000 | $1.9053 | $1,905.30 |
MC9S08RD32DWE Overview
A microcontroller is a semiconductor device that integrates a processor core, memory, peripherals, and I/O into one embedded-control component. The MC9S08RD32DWE belongs to the S08 8-bit MCU family, using a CISC architecture optimized for control-oriented embedded software. Its position in the hierarchy is microcontroller → embedded processor → integrated circuit, while its practical role is to execute firmware, read inputs, drive outputs, and communicate with external hardware.
The available specification data identifies an 8-bit core, 8 MHz operating speed, and 32 KB of high-speed Flash memory. Distributor listings also identify SCI connectivity and describe the device as an AQUILA SOIC lead-free MCU. These characteristics make it suitable for designs requiring deterministic embedded control without the memory demands of a higher-end 32-bit processor. The 32 KB Flash capacity allows firmware, configuration tables, and application logic to be stored on the MCU itself.
Typical designs using this MCU include small industrial controllers, sensor-interface boards, serial communication equipment, keypad and display controllers, and compact embedded products. SCI connectivity is useful for point-to-point serial links, while the general-purpose MCU architecture supports timers, input/output, and other peripherals described in the manufacturer documentation. The exact peripheral configuration and electrical limits should be confirmed against the manufacturer datasheet before final schematic approval.
A key design consideration is supply and signal compatibility. Use the datasheet's specified voltage range, pin multiplexing, reset requirements, decoupling recommendations, and programming procedure. Do not infer that every S08 device is pin-compatible merely because it uses the same core; package pin assignments and peripheral functions must match exactly. The 28-pin SOIC footprint also requires checking lead pitch and board layout before substitution.
This page combines the verified distributor specifications, source links, and practical sourcing guidance for MC9S08RD32DWE. It is intended to help engineers evaluate the MCU, locate its documentation, compare possible alternatives, and plan a controlled replacement or redesign.
Drop-in alternatives for MC9S08RD32DWE — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC9S08DZ60AMLH
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S08RD32DWE Maximum Ratings & Electrical Characteristics
| Product Type | 8-bit microcontroller |
| Core | S08 CISC |
| Operating Speed | 8 MHz |
| Flash Memory | 32 KB |
| Supply Voltage | 2.5 V to 3.3 V |
| Package | 28-pin SOIC |
| Package Width | 7.50 mm |
| Connectivity | SCI |
| Mounting Type | Surface Mount |
| Lead-Free Package | Lead-free AQUILA SOIC |
| Program Memory | 32 KB high-speed Flash |
| Architecture | 8-bit CISC |
| Manufacturer | NXP Semiconductors |
| Series | AQUILA |
MC9S08RD32DWE lead-free aquila soic Pin Configuration Guide
Pin configuration for MC9S08RD32DWE (lead-free aquila soic 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 MC9S08RD32DWE.
Refer to the datasheet for full pin configuration.
Typical Applications
MC9S08RD32DWE is suitable for 7 applications: Small Industrial Control Panels, Serial Sensor Interface, Keypad and Display Controller, Battery-Powered Embedded Products, Communication Equipment, Compact Data Acquisition System, Legacy Equipment Retrofit.
Small Industrial Control Panels
MC9S08RD32DWE fits compact control-panel designs that require an 8-bit embedded controller, 8 MHz operation, and 32 KB of on-chip Flash for application firmware. SCI connectivity can connect the controller to a local operator interface, sensor hub, or service port. The 28-pin SOIC package is convenient for through-hole assembly and repair, provided the board follows the exact datasheet pinout and power requirements. Before production release, verify temperature range, ESD/EFT requirements, isolation strategy, watchdog behavior, and any regulatory needs against the complete manufacturer documentation.
Recommended
Serial Sensor Interface
The MC9S08RD32DWE can serve as the local controller for a serial sensor node when the design accepts an 8-bit S08 architecture and SCI communications. Its 8 MHz processing speed supports basic acquisition, filtering, status handling, and command parsing, while 32 KB Flash provides room for application code and calibration tables. Keep the serial interface electrically compatible with the selected sensor, define robust reset behavior, and account for communication timing in firmware. The supplied data confirms SCI connectivity but does not specify the complete peripheral map, so final interface selection requires the manufacturer datasheet.
Recommended
Keypad and Display Controller
For keypad scanning, menu handling, status LEDs, and a small local display, MC9S08RD32DWE offers a practical 8-bit MCU with 32 KB Flash and 8 MHz processing speed. The controller can scan inputs in software, debounce contacts, update indicators, and manage a display or external driver through its available I/O and communications resources. The 28-pin SOIC package leaves a defined leaded footprint for assembly. Exact I/O allocation, timing, and electrical characteristics are not supplied in the verified search data, so engineers should use the official pin table and application guidance rather than infer peripheral assignments.
Recommended
Battery-Powered Embedded Products
MC9S08RD32DWE can be evaluated for compact battery-powered products where an 8-bit MCU is sufficient and the 32 KB Flash capacity accommodates embedded application logic. Low-cost 8-bit control can simplify firmware and reduce system complexity compared with a 32-bit processor, although the available data does not specify sleep currents, wake-up time, or battery-life performance. Confirm those parameters in the manufacturer datasheet, use low-leakage external components, and design power gating only after checking whether all I/O and communication functions tolerate the required voltage states.
Recommended
Communication Equipment
The SCI connectivity identified for MC9S08RD32DWE makes the device a candidate for compact communication equipment, protocol converters, and service interfaces. An 8 MHz S08 core can execute framing, command handling, and supervisory logic while 32 KB Flash stores firmware. SCI electrical levels, baud-rate support, protocol timing, and multiplexing details are not included in the verified data, so the system integrator must confirm them from the datasheet. Add protection appropriate to the external line, validate reset and firmware-update behavior, and ensure the selected transceiver matches the target voltage range.
Recommended
Compact Data Acquisition System
MC9S08RD32DWE is suitable for basic embedded data-acquisition functions such as sequential sampling, threshold checks, event logging, and host communication. Its 8 MHz speed supports many control-oriented workloads, while 32 KB Flash can hold a compact application program. The supplied evidence does not identify ADC resolution, sample-rate limits, timer resources, RAM size, or input count, so analog and timing requirements must be verified before selecting it. Use the exact pinout and electrical limits, isolate noisy analog paths, and document calibration and calibration-storage procedures for production.
Recommended
Legacy Equipment Retrofit
MC9S08RD32DWE can be considered for retrofit boards that already use a compatible 28-pin SOIC S08 design and require a like-for-like MCU replacement. The verified distributor record identifies the same general 8-bit S08, 8 MHz, and 32 KB Flash feature set, making archival documentation and firmware compatibility important assets. However, a mechanical footprint match does not establish electrical or firmware equivalence. Verify every pin, reset circuit, programming interface, clock source, memory map, and peripheral difference before fitting the replacement, and retain the original part’s validated firmware and test procedures.
Recommended
Recommended Products Summary
Engineering reference data for MC9S08RD32DWE — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S08DZ60AMLH |
|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors |
| Core | S08 CISC, 8-bit | S08, 8-bit |
| Operating Speed | 8 MHz | 8 MHz |
| Connectivity | SCI | SCI |
Key Differentiators
- Verified 32 KB Flash capacity (vs MC9S08DZ60AMLH)
- 28-pin SOIC package (vs MC9S08DZ60AMLH)
- 8 MHz S08 operating point (vs MC9S08SH4CPJ)
Design Notes
Use the official MC9S08RD32DWE pinout and package drawing before placing the 28-pin SOIC. Confirm pin numbering, power pins, ground connections, reset, programming signals, and alternate functions rather than relying on a generic S08 footprint. The verified data identifies the package and pin count but does not provide the complete pin table, so schematic and PCB review should include a direct comparison with the manufacturer datasheet.
The distributor specification identifies 2.5 V and 3.3 V supply operation, but the exact operating limits, current consumption, and power-pin requirements are not supplied. Confirm minimum and maximum supply voltage, decoupling, startup behavior, and I/O voltage tolerances in the manufacturer datasheet before selecting passive components or defining the system power tree.
Do not substitute another S08 microcontroller solely because it has an 8-bit core and similar speed. MC9S08RD32DWE is verified as a 32 KB Flash device in a 28-pin SOIC, while comparison candidates may differ in memory, package, pin assignments, and peripherals. Treat MC9S08DZ60AMLH as a candidate requiring validation, not as a confirmed drop-in replacement, until every relevant electrical and pin function is checked.
Plan the SCI implementation around the confirmed datasheet pin assignment and the voltage levels of the selected transceiver. Keep communication traces away from switching nodes and noisy analog inputs, provide the required grounding and protection, and validate signal integrity with the actual baud rate and cable or board environment. The verified source confirms SCI connectivity but does not define pin-level electrical details.
Compliance Information
The distributor result describes MC9S08RD32DWE as a lead-free AQUILA SOIC device. RoHS, REACH, halogen-free, and conflict-minerals status were not explicitly provided in the verified data.
