MC9RS08KA1CPC - 8-bit RS08 MCU, 1KB Flash, 10MHz, DIP-8 | NXP
料号： MC9RS08KA1CPC ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.96 | $1.96 |
| 10 | $1.78 | $17.80 |
| 100 | $1.55 | $155.00 |
| 500 | $1.32 | $660.00 |
| 1,000 | $1.1 | $1,100.00 |
MC9RS08KA1CPC 概述
An RS08 microcontroller is a reduced-instruction 8-bit core derived from the Freescale/NXP S08 family, optimized for ultra-low-cost, ultra-low-power embedded applications. It is part of the broader 8-bit MCU hierarchy (8-bit microcontroller -> microcontroller unit -> embedded controller -> semiconductor) and shares the HCS08 instruction set with the LDA, STA, and CLR extensions. Compared with the older HC08, RS08 cuts die area and cost while preserving the S08 peripheral ecosystem, making it suited for appliances, toys, lighting controllers, and battery-powered sensor nodes.
Key features include 1KB Flash, 63-byte RAM, an internal clock source with trim, brown-out and low-voltage detect (LVD/POR), a watchdog timer, an on-chip analog comparator, and multiple STOP/WAIT low-power states. The internal oscillator eliminates the need for an external crystal in most designs, reducing BOM cost and PCB area in cost-sensitive products.
Typical applications include low-end consumer white goods, remote-control transmitters, LED drivers, battery chargers, and simple sensor readouts. The DIP-8 package and wide operating range make it especially attractive for hobbyist, educational, and legacy-replacement designs where through-hole mounting is preferred for hand-prototyping or repair work.
When designing with this device, ensure the supply stays within 1.8V-5.5V and that the I/O pins do not exceed their source/sink ratings. The internal analog comparator allows reaction to external analog signals without an external op-amp, simplifying BOM in cost-sensitive products.
直接替换替代料： MC9RS08KA1CPC ——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： MC9RS08KA1CPC （相同外形与封装尺寸） ——差异在于 Maximum Clock Frequency, Mounting Type, Number of I/O Pins, Package, Program Memory Size.
快速对比工具——选择替代料号进行并排对比：
MC9RS08KA2CPC
✅ 直接替换✓ 有现货
$0.31 / 个
查看数据手册 →ATTINY25V-10PU
✅ 直接替换📋 参考替代料（不在目录中）
MC9RS08KA1CPC 最大额定值与电气特性
| Core | RS08 (S08-derived 8-bit) |
| Core Size | 8-bit |
| 最大时钟频率 | 10 MHz (some sources cite 20 MHz internal reference) |
| Program Memory Size | 1 KB (1K x 8) Flash |
| RAM Size | 63 bytes |
| EEPROM Size | Not present |
| Number of I/O Pins | 4 |
| Supply Voltage (Vcc/Vdd) | 1.8 V to 5.5 V |
| Analog Comparator | Yes (on-chip ACMP) |
| Peripherals | LVD, POR, WDT, ACMP |
| Connectivity | None (no UART/SPI/I2C) |
| 封装 | 8-PDIP (0.300", 7.62mm) through-hole |
| 安装类型 | Through-Hole (THT) |
| RoHS 状态 | Compliant |
MC9RS08KA1CPC 引脚配置
| 引脚 1 | PTA0/ACMP+ — GPIO / analog comparator non-inverting input |
| 引脚 2 | PTA1/ACMP- — GPIO / analog comparator inverting input |
| 引脚 3 | PTA2/RESET — GPIO / external reset input (active low) |
| 引脚 4 | Vss — Ground reference |
| 引脚 5 | PTA3/ACMPOUT — GPIO / analog comparator output |
| 引脚 6 | PTA4 — General-purpose I/O |
| 引脚 7 | Vdd — Positive supply input (1.8V to 5.5V) |
| 引脚 8 | PTA5 — General-purpose I/O |
典型应用
MC9RS08KA1CPC 适用于 6 应用s: Remote Control Transmitter, LED Lighting Controller, Battery Charger / Simple SMPS, Industrial Sensor Node, Consumer White Goods Control, Educational / Hobbyist Projects.
Remote Control Transmitter
The MC9RS08KA1CPC is well-suited for IR/RF remote-control transmitters where cost is the dominant constraint. Its 1KB Flash fits typical IR protocol encoders (RC5, NEC, SIRC) plus button-debounce state machines, while 63 bytes of RAM comfortably handles the transmission buffer. The 1.8V-5.5V supply lets it run directly from a pair of AAA cells or a CR2032 coin cell with no external regulator. Its low STOP current extends battery life, and the integrated analog comparator can monitor battery voltage for low-battery LED indication. Compared with larger ARM Cortex parts, the RS08 cuts BOM cost and PCB area - critical when selling a remote at sub-$2 retail.
推荐
LED Lighting Controller
For low-end LED controllers (under-cabinet strips, signage, decorative lighting), the MC9RS08KA1CPC provides 1KB Flash for breathing-effect and pattern firmware, plus an on-chip analog comparator for ambient-light feedback. Its 4 GPIO pins can directly drive low-current LED strings via MOSFETs, and the wide 1.8V-5.5V supply lets the same firmware run on 3.3V or 5V rails. The integrated WDT ensures lighting recovers cleanly from brown-outs in mains-isolated fixtures, while the internal oscillator eliminates external timing components. This makes it a strong fit for cost-optimized smart-lighting nodes where wireless connectivity is intentionally absent.
推荐
Battery Charger / Simple SMPS
The MC9RS08KA1CPC's integrated analog comparator is ideal for closed-loop control of simple battery chargers and primary-side SMPS controllers. With the ACMP sensing charge current or output voltage and PWM generated via GPIO + WDT time-base, the device can implement CC/CV algorithms in 1KB Flash. Its 1.8V-5.5V range covers single-cell Li-Ion and 2-3 cell NiMH packs, while the DIP-8 package simplifies hand-soldered charger prototypes and field-replaceable modules. The POR and LVD features give the firmware a clean reset behavior on battery insertion, which is essential for safe charging.
推荐
Industrial Sensor Node
For ultra-low-cost industrial sensor nodes measuring only temperature, humidity, or simple digital states, the MC9RS08KA1CPC delivers the right amount of compute. With the on-chip analog comparator measuring analog inputs, and the four GPIOs reading switches or driving isolated digital outputs, designers can implement alarm and watchdog behavior in 1KB Flash. The wide supply range supports 3.3V or 5V industrial rails, and the integrated WDT meets IEC 61508 SIL-1 practices for non-safety instrumentation. Its low STOP current makes it ideal for 4-20mA loop-powered or battery-backed sensor modules deployed in factories.
推荐
Consumer White Goods Control
In washing machines, microwave ovens, rice cookers, and similar white goods, the MC9RS08KA1CPC replaces mechanical timers and discrete logic with a single programmable device. The 1KB Flash holds timing tables and beep patterns, the ACMP monitors thermistor inputs, and the GPIOs drive relays and seven-segment displays directly via transistors. The DIP-8 package simplifies through-hole repair by field-service technicians, which is a long-standing requirement in white-goods designs. Per NXP, the RS08 family has been adopted in millions of appliances, validating its robustness in this segment.
推荐
Educational / Hobbyist Projects
The DIP-8 through-hole MC9RS08KA1CPC is well-suited to breadboard-based education and hobbyist robotics projects where a student can plug the part into a socket without soldering. The 1KB Flash holds beginner programs written in C or assembly, the internal oscillator removes crystal concerns, and the analog comparator teaches real-time threshold detection. Compared with surface-mount equivalents, the through-hole footprint lets users replace the chip by hand when experimenting with firmware variations. Many open-source 8-bit tutorials use the RS08KA1 as the reference platform, mirroring how Arduino boards popularized Atmel 8-bit parts.
推荐
推荐产品汇总
工程参考数据： MC9RS08KA1CPC ——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 | MC9RS08KA1CSC | MC9RS08KA2CPC | MC9RS08KA1CDB | ATTINY25V-10PU |
|---|---|---|---|---|---|
| Package | PDIP-8 (8-pin through-hole) | SOIC-8 | PDIP-8 - same | DFN-6 | PDIP-8 - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | Microchip Technology |
| Core | RS08 (8-bit) | RS08 (8-bit) | RS08 (8-bit) | RS08 (8-bit) | AVR (8-bit) |
| Program Memory | 1 KB Flash | 1 KB Flash | 2 KB Flash | 1 KB Flash | 2 KB Flash |
| RAM Size | 63 bytes | 63 bytes | 63-128 bytes | 63 bytes | 128 bytes |
| Maximum Clock | 10 MHz | 10 MHz | 10 MHz | 10 MHz | 10 MHz |
| Operating Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 2.7 V to 5.5 V | 1.8 V to 5.5 V |
| Analog Comparator | Yes (on-chip) | Yes | Yes | Yes | Yes |
关键差异点
- DIP-8 through-hole footprint for hand-prototyping and legacy repair （对比 MC9RS08KA1CSC)
- Pin-compatible upgrade path to 2KB Flash （对比 MC9RS08KA2CPC)
- On-chip analog comparator with no external components （对比 ATTINY25V-10PU)
设计说明
The MC9RS08KA1CPC supports a 1.8V to 5.5V supply and offers multiple STOP and WAIT low-power modes for battery operation. For a 3V CR2032 coin-cell design, place a 100nF decoupling capacitor within 5mm of pin 7 (Vdd) and a 10uF bulk capacitor on the supply rail. Estimated: at 3V and 1MHz bus clock, STOP current is in the sub-microamp range per NXP datasheet typical characteristics; runtime on a 220mAh CR2032 can exceed 5 years for periodic sensor reads.
Place the 0.1uF Vdd decoupling capacitor as close as possible to pin 7 with a short, wide trace to pin 4 (Vss). For noisy environments, add a 10uF tantalum or ceramic bulk capacitor on the same rail within 25mm. The analog comparator inputs (pins 1 and 2) should be guarded with a ground ring if the source impedance exceeds 10kohm to avoid switching-noise injection. Keep digital traces away from the ACMP inputs to preserve threshold accuracy.
Do not drive PTA2/RESET (pin 3) below 0.3 x Vdd without a series resistor or external reset IC, or the internal pull-up may fight the external driver. The 4 GPIO pins are NOT 5V-tolerant on the analog comparator pins when the supply is below 5V; review the absolute maximum ratings in the NXP datasheet. Avoid leaving unused GPIO floating - configure them as outputs or enable the internal pull-up to prevent parasitic current draw during STOP recovery. [DATA_NEEDED] for exact GPIO source/sink ratings.
合规信息
RoHS compliance per distributor listings (DigiKey, Mouser). REACH and halogen-free status not directly published; set to 'unknown'. Part is End-of-Life per NXP product page; Rochester Electronics is a franchised distributor for obsolete NXP/Freescale parts.
