MC9RS08KA1CSC - 8-Bit RS08 MCU, 1KB Flash, SOIC-8 | NXP
料号： MC9RS08KA1CSC ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $2.27 | $2.27 |
| 10 | $2.27 | $22.70 |
| 100 | $2.27 | $227.00 |
| 500 | $2.27 | $1,135.00 |
| 1,000 | $2.27 | $2,270.00 |
MC9RS08KA1CSC 概述
The RS08 core is a compact CISC processor built around the S08 instruction set with additional high-performance LDA, STA, and CLR instructions. This MCU is intended for simple control, sensing, and actuator tasks where a larger 8-bit MCU would add unnecessary cost, memory, and board area. Its 63-byte RAM and 1 KB flash are sufficient for startup code, basic state machines, and tightly bounded control logic rather than general-purpose applications.
The device operates from a low-voltage supply suitable for embedded and battery-oriented designs, with an internal oscillator eliminating a mandatory external clock source. The RS08KA family also includes timer and interrupt resources for periodic sensing and event handling. Power-management features and the small package help reduce both board footprint and system complexity in cost-driven products.
Typical uses include simple keypad or button interfaces, low-speed motor and relay controllers, basic sensor nodes, household appliance controls, and auxiliary embedded functions. The compact SOIC-8 outline is useful when through-hole or leaded assembly is preferred, but its 1 KB program memory is a strict constraint for larger control algorithms.
When designing around MC9RS08KA1CSC, verify the exact pin multiplexing, reset behavior, oscillator limits, and supply-voltage range in the NXP datasheet. Avoid assuming that all RS08 family members are software-compatible, because memory size and peripheral configurations can differ. A migration to a larger MCU may be required if the application grows beyond the 63-byte RAM and 1 KB flash budget.
This product page combines verified distributor data, lifecycle information, package details, design constraints, and an honest assessment of alternative availability. It is intended to help engineers quickly determine whether this RS08KA device fits a minimal embedded-control design before requesting documentation and sourcing support.
直接替换替代料： MC9RS08KA1CSC ——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： MC9RS08KA1CSC （相同外形与封装尺寸） ——差异在于 Package, Maximum Clock Frequency, Mounting Type, Core Processor, Data Bus Width.
快速对比工具——选择替代料号进行并排对比：
MC9RS08KA1CDB
✅ 直接替换✓ 有现货
$2.05 / 个
查看数据手册 →MC9RS08KA2CSC
✅ 直接替换📋 参考替代料（不在目录中）
MC9RS08KA2CSCR
✅ 直接替换📋 参考替代料（不在目录中）
MC9RS08KA1CSC 最大额定值与电气特性
| Product Type | 8-bit microcontroller (MCU) |
| Processor Core | RS08 |
| Processor Series | RS08KA |
| 数据总线宽度 | 8-bit |
| 最大时钟频率 | 10 MHz |
| Flash Memory | 1 KB (1K x 8) |
| Internal RAM | 63 bytes |
| Supply Voltage Range | 1.8 V to 5.5 V |
| Architecture | CISC |
| Internal Oscillator | Yes |
| System Protection | LVD, POR, WDT |
| 封装 | 8-pin SOIC |
| 安装类型 | Surface Mount |
| Operating Voltage | 2.5 V / 3.3 V / 5 V |
| Programming Memory | 1 KB internal flash |
| Timer | 8-bit modulo timer |
| Keyboard Interrupts | Five keyboard interrupt resources |
| RoHS 状态 | Unknown; not stated in verified data |
| Manufacturer | NXP Semiconductors |
MC9RS08KA1CSC 8-pin soic 引脚配置指南
MC9RS08KA1CSC（8-pin soic 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： MC9RS08KA1CSC.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MC9RS08KA1CSC 适用于 7 应用s: Cost-Sensitive Basic Control, Simple Sensor Node, Button and Keypad Interface, Simple Relay and Actuator Controller, Battery-Powered Household Device, Low-Speed Motor or Relay Timing, Compact Auxiliary Embedded Function.
Cost-Sensitive Basic Control
MC9RS08KA1CSC fits simple appliance controls, button interfaces, and small state-machine products where a 1 KB flash budget is sufficient. The RS08 8-bit CISC core and 63 bytes of RAM can handle sequencing, basic logic, and low-rate input polling without a larger MCU. The 8-pin SOIC package keeps the board compact, while the internal oscillator removes a mandatory external clock component. Designers should constrain firmware size and verify the exact pin functions in the NXP datasheet before finalizing the control PCB.
推荐
Simple Sensor Node
The MC9RS08KA1CSC can supervise basic analog or digital sensing functions in a compact embedded node. Its 1.8 V to 5.5 V feature range and internal oscillator make it useful in low-power, low-complexity systems, provided the exact operating limits are confirmed. The small memory footprint favors short acquisition and decision code rather than buffering or complex algorithms. Use the 63-byte RAM carefully, and avoid designs that require substantial protocol stacks or high-resolution data storage.
推荐
Button and Keypad Interface
MC9RS08KA1CSC is appropriate for small keypad, debounced switch, and menu-control subsystems. The family description identifies five keyboard interrupt resources, allowing the MCU to respond to external events while executing a compact control loop. This is useful in products where the keypad is the primary human interface and the required firmware remains below the 1 KB flash limit. Validate debounce timing, interrupt behavior, and active levels against the exact datasheet rather than assuming compatibility with larger RS08 devices.
推荐
Simple Relay and Actuator Controller
The compact RS08KA MCU can control relays, indicators, or other low-rate actuators in compact embedded products. Its 8-bit architecture and timer resources are sufficient for basic sequencing and debounce logic, while the 8-pin SOIC package simplifies leaded assembly. The device is not a replacement for a high-current driver; external transistors, protection, and appropriate power components remain necessary. Confirm pin drive capability, supply behavior, and watchdog requirements in the manufacturer documentation.
推荐
Battery-Powered Household Device
MC9RS08KA1CSC can serve as the control core in a small battery-powered household device where the application is primarily event-driven. The internal oscillator and low-resource architecture reduce component count, while the compact SOIC-8 package supports space-constrained boards. Actual battery life depends on the complete firmware, peripherals, pull states, and sleep behavior, none of which are fully quantified in the supplied data. Validate low-power modes and current consumption against the NXP datasheet and application requirements.
推荐
Low-Speed Motor or Relay Timing
The MC9RS08KA1CSC is suitable for simple timing and open-loop control tasks where the system does not require high computation or precision motor algorithms. The RS08 core can manage scheduled outputs and basic feedback logic within its limited memory budget. External driver circuitry is required for most motors, and protection against inductive transients must be designed separately. Confirm timer resolution, maximum clock conditions, and pin electrical limits before relying on timing-critical behavior.
推荐
Compact Auxiliary Embedded Function
MC9RS08KA1CSC can add a small local control function to a larger appliance or module without committing to a high-memory microcontroller. This is useful for status LEDs, limit detection, simple interlocks, or local button logic while another processor handles system-wide tasks. The 63-byte RAM and 1 KB flash make partitioning the firmware essential. Define communication boundaries carefully because the supplied data does not specify a rich communications peripheral set for this exact variant.
推荐
推荐产品汇总
工程参考数据： MC9RS08KA1CSC ——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 | MC9RS08KA1CDB | MC9RS08KA2CSC | MC9RS08KA2CSCR |
|---|---|---|---|---|
| Package | 8-pin SOIC | SOIC-8 | SOIC-8 | SOIC-8 |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Processor Core | RS08 | RS08 | RS08 | RS08 |
| Data Bus Width | 8-bit | 8-bit | 8-bit | 8-bit |
关键差异点
- Extremely compact memory footprint （对比 MC9RS08KA2CSC)
- Targeted ultra-low-cost positioning （对比 MC908GP32CFBE)
- Internal oscillator integration （对比 MC9RS08KA2CSCR)
设计说明
Before power-up, confirm the exact supply range, operating voltage modes, absolute maximum ratings, and power-on reset behavior in the NXP datasheet. The supplied distributor data references 1.8 V to 5.5 V and also 2.5 V, 3.3 V, and 5 V, so do not select decoupling or regulator values from the broadest listing alone. Keep the supply decoupling path short and validate brownout behavior for the final external load.
Use the manufacturer package drawing and verified pin table to finalize the SOIC-8 land pattern. Place the decoupling capacitor close to the device power pin and preserve a clean ground return. Because the verified data does not provide the complete MC9RS08KA1CSC pin table, do not infer programming, reset, oscillator, or I/O functions from a related RS08 part without schematic review.
The 1 KB flash and 63-byte RAM are the dominant design constraints. Measure the linked code size early, avoid library-heavy middleware, and keep stack depth conservative. The related MC9RS08KA2CSC has 2 KB flash, so treating it as a direct replacement without checking the memory and pin behavior can create software or hardware surprises.
For simple switching or keypad applications, separate sensitive timing paths from high-current switching loops and keep external driver traces away from the MCU supply and signal pins. If relays or motors are used, provide protection networks and adequate return-current paths; the MCU should control drivers through defined interfaces rather than carry inductive current directly.
合规信息
The supplied web data does not explicitly state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status. AEC-Q100 is not indicated for this general-purpose MCU.