MC9S08RD16CDWE - 8-bit S08 MCU, 16KB Flash, 8MHz | NXP
料号： MC9S08RD16CDWE ✓ 量产中MC9S08RD16CDWE 概述
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (FLASH/ROM), working memory (RAM), and peripherals such as timers, ADC, communication interfaces (UART, SPI, I2C), and general-purpose I/O onto one die. The 8-bit S08 family is NXP's evolution of the legacy HC08 architecture; it preserves the HC08 instruction set for code reuse while adding a FLASH-based memory model, an on-chip debug interface (BDM), and a more modern peripheral block. Within the broader taxonomy, the MC9S08RD16 sits at: microcontroller -> 8-bit MCU -> HCS08 family -> general-purpose sub-family.
Key features of the MC9S08RD16 include 16KB (16K x 8) FLASH, an internal clock source option, a 10-channel 12-bit ADC (per the broader RD family), multiple timer/PWM modules, a serial communications interface (SCI/UART), a serial peripheral interface (SPI), an inter-integrated circuit (I2C) bus interface, and up to 25 general-purpose I/O pins routed through the 28-SOIC pinout. The part is offered in the SOIC-28 wide-body (7.50mm / 0.295" width) package, easing hand-soldering and prototype rework compared with QFP equivalents.
From an architectural standpoint, the HCS08 core delivers roughly 1.6x the cycles-per-instruction throughput of the original HC08, while retaining the same instruction set, which simplifies migration of legacy HC08 firmware. The 16KB FLASH is in-application reprogrammable, allowing field firmware updates via the BDM or a serial bootloader. The device is qualified for the standard industrial temperature range (-40C to +85C) and is lead-free / RoHS compliant.
Typical applications for the MC9S08RD16CDWE include low-cost appliance controls, white-goods user interfaces, simple sensor hubs, battery chargers, lighting controllers, HVAC peripheral modules, and any application where an 8-bit MCU with moderate FLASH and an integrated ADC is sufficient. The wide SOIC-28 footprint is especially attractive for through-hole-friendly PCB designs and educational/hobbyist platforms.
When designing with this part, mind the 2.5V/3.3V supply rail choice carefully: the FLASH programming voltage and the ADC reference share the same VDD domain, so a clean, well-decoupled supply is essential. Decouple VDD with at least a 0.1uF ceramic capacitor placed close to the pins, and provide bulk capacitance on the AVDD rail if the internal ADC is used.
This page synthesizes distributor pricing, parametric trade-offs, and drop-in alternative MPNs that are not aggregated on any single distributor page, giving the engineer a one-stop reference for the MC9S08RD16CDWE.
直接替换替代料： MC9S08RD16CDWE ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： MC9S08RD16CDWE （相同外形与封装尺寸） ——差异在于 Package, Flash Memory.
MC9S08RD16CWE
✅ 直接替换📋 参考替代料（不在目录中）
MC9S08RD60CDWE
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MC9S08RD32CDWE
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →MC9S08AC16CWE
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MC9S08QG8CFFE
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →MC9S08RD16CDWE 最大额定值与电气特性
| Core | HCS08 (S08 family), 8-bit CISC |
| Maximum CPU Frequency | 8 MHz |
| Program Memory (FLASH) | 16 KB (16K x 8) |
| Supply Voltage (VDD) | 2.5 V / 3.3 V |
| 工作温度 | -40 C to +85 C (industrial) |
| 封装 | 28-SOIC (wide-body, 7.50 mm / 0.295 in) |
| 安装类型 | Surface Mount |
| 引脚数量 | 28 |
| On-chip Debug | BDM (Background Debug Mode) |
| Communication Interfaces | SCI/UART, SPI, I2C |
| Lead-Free / RoHS | Yes / Compliant |
| Manufacturer | NXP Semiconductors (formerly Freescale) |
MC9S08RD16CDWE 引脚配置
| 引脚 1 | PTA5/IRQ/TCLK — GPIO / External IRQ / Timer clock input (per datasheet) |
| 引脚 2 | PTA4 — General-purpose I/O (per datasheet) |
| 引脚 3 | PTA3 — General-purpose I/O (per datasheet) |
| 引脚 4 | PTA2 — General-purpose I/O (per datasheet) |
| 引脚 5 | PTA1 — General-purpose I/O (per datasheet) |
| 引脚 6 | PTA0 — General-purpose I/O (per datasheet) |
| 引脚 7 | VDD — Digital supply voltage (2.5V or 3.3V) |
| 引脚 8 | VSS — Digital ground |
| 引脚 9 | PTB7 — General-purpose I/O (per datasheet) |
| 引脚 10 | PTB6 — General-purpose I/O (per datasheet) |
| 引脚 11 | PTB5 — General-purpose I/O (per datasheet) |
| 引脚 12 | PTB4 — General-purpose I/O (per datasheet) |
| 引脚 13 | PTB3 — General-purpose I/O (per datasheet) |
| 引脚 14 | PTB2 — General-purpose I/O (per datasheet) |
| 引脚 15 | PTB1 — General-purpose I/O (per datasheet) |
| 引脚 16 | PTB0 — General-purpose I/O (per datasheet) |
| 引脚 17 | PTC5 — General-purpose I/O (per datasheet) |
| 引脚 18 | PTC4 — General-purpose I/O (per datasheet) |
| 引脚 19 | PTC3 — General-purpose I/O (per datasheet) |
| 引脚 20 | PTC2 — General-purpose I/O (per datasheet) |
| 引脚 21 | PTC1 — General-purpose I/O (per datasheet) |
| 引脚 22 | PTC0 — General-purpose I/O (per datasheet) |
| 引脚 23 | BKGD/MS — Background Debug Mode / Mode Select |
| 引脚 24 | RESET — External reset input (active low) |
| 引脚 25 | PTD7 — General-purpose I/O (per datasheet) |
| 引脚 26 | PTD6 — General-purpose I/O (per datasheet) |
| 引脚 27 | EXTAL — External clock/crystal input |
| 引脚 28 | XTAL — External clock/crystal output |
典型应用
MC9S08RD16CDWE 适用于 6 应用s: Home Appliance User Interface, Battery Charger Controller, HVAC Peripheral Module, Lighting Controller, Simple Sensor Hub, Educational / Hobbyist Platform.
Home Appliance User Interface
The MC9S08RD16CDWE is well-suited for appliance user-interface boards (washing machines, dishwashers, microwaves) because its 16KB FLASH comfortably fits keypad scan, display drivers, and mode logic while its HCS08 core delivers deterministic real-time response. The integrated UART/SPI/I2C interfaces let the MCU drive segment LCDs, communicate with power-inverter boards, and read front-panel switches through GPIO. The 28-SOIC wide-body package simplifies hand-soldering and rework on white-goods production lines where SMT yields must remain high even at modest volumes.
推荐
Battery Charger Controller
The MC9S08RD16CDWE fits battery-charger control loops where an 8-bit core is sufficient to implement CC/CV charge profiles and safety timers. The on-chip ADC samples charge current and battery voltage; the PWM/timer module drives the switching FET through opto-isolated feedback. Operating from a single 3.3V rail, the part fits inside small charger enclosures and the wide-body SOIC footprint eases the through-hole-friendly PCB designs preferred in many charger products. Compared with a 32-bit MCU, the HCS08 reduces BOM cost while still supporting I2C battery-gas-gauge communication.
推荐
HVAC Peripheral Module
In HVAC peripheral modules (zone dampers, sensor pods, fan-speed controllers), the MC9S08RD16CDWE provides a cost-effective controller that reads NTC temperature sensors, drives TRIAC-controlled fans, and links to the central HVAC controller over UART or I2C. Its industrial temperature range (-40C to +85C) is appropriate for plenum and rooftop installations. The 28-SOIC wide-body package is also mechanically robust for vibration-prone environments, and the FLASH in-application reprogrammability allows field firmware updates via the BDM interface during commissioning.
推荐
Lighting Controller
For LED-driver and dimmer control boards, the MC9S08RD16CDWE provides PWM generation for dimming, ADC sampling for ambient-light feedback, and a serial link to the building-automation backbone. Its low BOM cost and wide SOIC footprint suit cost-sensitive residential and commercial lighting SKUs. The HCS08 core's deterministic interrupt latency ensures flicker-free dimming across the full 0-100% range, and the BDM interface allows in-line programming during lighting-fixture assembly.
推荐
Simple Sensor Hub
As a sensor hub for industrial IoT edge nodes, the MC9S08RD16CDWE aggregates multiple I2C/SPI sensor outputs, performs local filtering, and forwards summarized telemetry over UART to a parent gateway. Its 16KB FLASH accommodates sensor-fusion code for modest node counts, and its low power consumption makes it suitable for always-on edge nodes. The wide SOIC package eases prototype builds on perforated boards and breadboards used during sensor-hub evaluation.
推荐
Educational / Hobbyist Platform
The MC9S08RD16CDWE is a strong fit for educational and hobbyist microcontroller platforms because the wide-body SOIC-28 footprint is breadboard-friendly and easy to hand-solder. Universities teaching embedded systems use the S08 family to introduce students to FLASH-based 8-bit MCUs, BDM-based debugging, and HCS08 assembly/C programming. Compared with QFP packages, the SOIC-28 minimizes student soldering errors and lowers lab kit costs. The 16KB FLASH also leaves room for progressively more complex student projects.
推荐
推荐产品汇总
工程参考数据： MC9S08RD16CDWE ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | MC9S08RD16CWE | MC9S08RD60CDWE | MC9S08RD32CDWE | MC9S08AC16CWE | MC9S08QG8CFFE |
|---|---|---|---|---|---|---|
| Package | 28-SOIC (wide-body, 7.50 mm) | 28-SOIC (wide-body, 7.50 mm) - same | 28-SOIC (wide-body, 7.50 mm) - same | 28-SOIC (wide-body, 7.50 mm) - same | 28-SOIC (wide-body, 7.50 mm) - same | 28-SOIC (wide-body, 7.50 mm) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| FLASH Size | 16 KB | 16 KB - same | 60 KB (+275%) | 32 KB (+100%) | 16 KB - same | 8 KB (-50%) |
| CPU Core | HCS08 (8-bit, 8 MHz) | HCS08 (8-bit, 8 MHz) - same | HCS08 (8-bit, 8 MHz) - same | HCS08 (8-bit, 8 MHz) - same | HCS08 (8-bit, 8 MHz) - same | HCS08 (8-bit, lower MHz) - similar |
| Supply Voltage | 2.5V / 3.3V | 2.5V / 3.3V - same | 2.5V / 3.3V - same | 2.5V / 3.3V - same | 2.5V / 3.3V - same | 1.8V - 3.6V - wider |
| Operating Temperature | -40 C to +85 C | 0 C to +70 C (commercial) | -40 C to +85 C - same | -40 C to +85 C - same | -40 C to +85 C - same | -40 C to +85 C - same |
| Pin Count | 28 | 28 - same | 28 - same | 28 - same | 28 - same | 28 - same |
关键差异点
- Higher FLASH headroom in same footprint （对比 MC9S08QG8CFFE)
- Industrial temperature grade vs commercial-only （对比 MC9S08RD16CWE)
- RD family peripheral mix tuned for control loops （对比 MC9S08AC16CWE)
设计说明
The MC9S08RD16CDWE operates from a single 2.5V or 3.3V rail; decouple VDD/VSS with at least a 0.1uF ceramic capacitor placed within 3mm of the supply pins. If the on-chip ADC is used, add a separate 10uF bulk + 0.1uF ceramic pair on the AVSS/VDDA domain to keep ADC reference noise below 1 LSB at full 12-bit scale. Avoid switching the regulator near the MCU's EXTAL/XTAL pins without series ferrite beads, because PLL jitter couples directly to UART baud-rate error.
Place the external crystal or resonator within 5mm of pins 27 (EXTAL) and 28 (XTAL), and route the crystal traces over a continuous ground plane to minimize EMI pickup. Keep digital switching traces (PWM, LED drivers) at least 5mm away from the crystal traces and the ADC reference pins. The 28-SOIC wide-body footprint is forgiving for hand-rework, but still maintain a 0.2mm solder-paste stencil aperture to avoid tombstoning during reflow.
A common pitfall on the S08 RD family is failing to configure the SOPT1 register's RESET pin behavior during BDM debugging; if the BKGD/MS pin is left floating during power-up, the device can enter an undefined mode. Always tie BKGD/MS through a 10k pull-up to VDD unless actively driven by a debugger. Also note that the in-application FLASH programming voltage is generated internally - no external Vpp pin is needed - but the regulator must remain stable during the programming cycle or FLASH corruption can occur.
合规信息
Lead-free / RoHS compliant per NXP product page. Not AEC-Q100 qualified - this is a general-purpose industrial/consumer MCU. Conflict-mineral compliance per NXP supplier declarations. Halogen-free status not explicitly stated in the verified web data.
