PC9RS08KA2PAE - 8-Bit RS08 MCU, 2KB Flash, 10MHz | NXP
MPN： PC9RS08KA2PAE ✗ 停產PC9RS08KA2PAE 概覽
An RS08 microcontroller is a reduced-pin-count, low-cost derivative of the Freescale/NXP S08 family, optimized for cost-sensitive, space-constrained applications that need deterministic 8-bit performance without external components. Architecturally, an RS08 sits within the broader 8-bit MCU taxonomy: microcontroller -> embedded controller -> 8-bit MCU -> HCS08/RS08 family -> cost-optimized sub-family. The CPU core implements a streamlined S08 instruction set so legacy ColdFire/S08 code can be ported with minimal effort while the silicon footprint and BOM cost remain minimal.
Key feature highlights include 2KB FLASH (in-system programmable), 63 bytes of RAM supporting a tiny memory model with single-byte direct addressing for the first 16 locations, an internal oscillator that eliminates the need for an external crystal in most designs, four GPIO pins multiplexed with peripheral functions, and shadow register support for fast context switching in interrupt service routines. The simplified instruction set retains ADD, SUB, INC, and DEC for tiny addressing mode, allowing C compilers and assembler code to generate compact binaries.
Typical applications include low-cost consumer appliances, IR remote controls, single-chip sensor interfaces, LED lighting controllers, simple battery chargers, and any embedded product that needs an 8-bit brain with on-chip non-volatile memory and a small pin count. The integrated LVD and watchdog make it suitable for unattended or mains-powered equipment that must reset cleanly on brown-out events.
When designing with the PC9RS08KA2PAE, ensure the supply rail stays within the device's Vcc/Vdd range and place a 0.1 uF decoupling capacitor as close as possible to pin 8 (Vdd). CodeWarrior for RS08 (now offered as NXP's free CodeWarrior for ColdFire+RS08) and P&E Multilink/Cyclone programmers are required for in-circuit development. As the part is marked Obsolete in distributor listings, designers of new products should plan for last-time-buy or consider NXP S08KA2 series successors.
直接替換替代品，適用於 PC9RS08KA2PAE — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PC9RS08KA2PAE （相同外形與佔位） — 差異在於 Mounting Type, Program Memory Size, Instruction Set, Package / Case, RAM Size.
PC9RS08KA2PAE
✅ 直接替換聯絡詢價
查看資料表 →PC9RS08KA2FPE
✅ 直接替換📋 參考替代品（不在目錄中）
PC9RS08KA2DWE
✅ 直接替換聯絡詢價
查看資料表 →MC9RS08KA2CSC
✅ 直接替換📋 參考替代品（不在目錄中）
MC9RS08KA4CWJ
✅ 直接替換聯絡詢價
查看資料表 →PIC10F200T-I/OT
✅ 直接替換📋 參考替代品（不在目錄中）
PC9RS08KA2PAE 最大額定值與電氣特性
| Core Processor | RS08 |
| Core Size | 8-Bit |
| Maximum CPU Speed | 10 MHz |
| Program Memory Size | 2 KB (2K x 8) FLASH |
| RAM Size | 63 x 8 (63 bytes) |
| EEPROM Size | None (FLASH-based) |
| Number of I/O Pins | 4 |
| 封裝 / 外殼 | 8-DIP (0.300 inch, 7.62 mm) |
| Oscillator Type | Internal |
| Peripherals | LVD, POR, WDT |
| Connectivity | None (stand-alone MCU) |
| Supply Voltage (Vcc/Vdd) | 1.8 V to 5.5 V (typical RS08 KA family range) |
| 安裝類型 | Through-hole (DIP) |
| MSL 等級 | Not applicable (through-hole) |
| Instruction Set | Simplified S08 with LDA/STA/CLR high-performance extensions |
| Packaging | Tube |
PC9RS08KA2PAE 腳位配置
| 腳位 1 | PTA0/KBIP0 — GPIO PTA0 / Keyboard Interrupt Pin 0 |
| 腳位 2 | PTA1/KBIP1 — GPIO PTA1 / Keyboard Interrupt Pin 1 |
| 腳位 3 | PTA2/KBIP2/RESET — GPIO PTA2 / Keyboard Interrupt Pin 2 / RESET (multiplexed) |
| 腳位 4 | Vss — Ground reference |
| 腳位 5 | PTA3/KBIP3 — GPIO PTA3 / Keyboard Interrupt Pin 3 |
| 腳位 6 | PTA4/KBIP4 — GPIO PTA4 / Keyboard Interrupt Pin 4 |
| 腳位 7 | Vdd — Positive supply voltage (typical 1.8 V to 5.5 V) |
| 腳位 8 | PTA5/KBIP5 — GPIO PTA5 / Keyboard Interrupt Pin 5 |
典型應用
PC9RS08KA2PAE 適用於 6 應用s: IR Remote Control Transmitter, Low-Cost Sensor Interface MCU, LED Lighting Controller, Battery-Powered Appliance Timer, Toy and Hobby Electronics, Industrial Replaceable Sensor Nodes.
IR Remote Control Transmitter
The PC9RS08KA2PAE is a strong fit for single-purpose IR remote transmitters because the application requires only 4 GPIO pins (one for the IR LED driver, one for the keyboard matrix, two for supply/key), 10 MHz CPU speed to bit-bang RC5/RC6 or NEC protocols, and 2 KB FLASH to hold a small protocol state machine plus key debounce code. According to the RS08 KA family datasheet, the internal oscillator is accurate enough for 38 kHz carrier generation at typical indoor temperatures, eliminating the external crystal and reducing BOM cost. The integrated WDT protects against button-stuck lockups, while the LVD ensures clean reset on weak-battery events. Typical current draw during keypress is under 2 mA at 3 V.
推薦
Low-Cost Sensor Interface MCU
The PC9RS08KA2PAE suits simple digital sensor interfacing where the MCU needs to read a single GPIO, apply basic linearization, and report the result over a slow UART or PWM line. Its 4 GPIO pins provide enough headroom for a one-wire DS18B20-style sensor, an LED indicator, a configuration push-button, and a serial output. The 2 KB FLASH is sufficient for fixed-point temperature conversion, and the 10 MHz RS08 core executes the loop in under 100 microseconds per sample. The internal oscillator removes the crystal cost that is otherwise required for accurate UART baud rates, though designers should characterize timing tolerance against the sensor protocol.
推薦
LED Lighting Controller
Decorative and architectural LED controllers benefit from the PC9RS08KA2PAE's small footprint, internal oscillator, and PWM-capable GPIO. The 4 GPIO pins can drive two channels of MOSFET-switched LED strings plus two user inputs (mode select, brightness). According to the manufacturer datasheet, the RS08 core supports timer-based PWM with software-configurable duty cycle, allowing smooth color fades for RGB tape without external driver ICs. The integrated watchdog timer prevents lockups if software enters an invalid state, which is essential for unattended lighting installations.
推薦
Battery-Powered Appliance Timer
Simple appliance timers (kitchen aids, irrigation pumps, fan controllers) running from two or three AA cells are a perfect match for the PC9RS08KA2PAE. The wide Vcc range (down to ~1.8 V) supports operation all the way to alkaline end-of-life, and the 4 GPIO pins can drive a relay, sense a push-button, light an LED, and monitor a low-battery ADC pin (via internal bandgap reference). The 2 KB FLASH holds a scheduling table, while the WDT triggers a clean shutdown if firmware fails to acknowledge within a watchdog window. Estimated quiescent current of the RS08 KA family is under 1 mA, preserving battery life.
推薦
Toy and Hobby Electronics
Cost-sensitive consumer toys, model train controllers, and hobby electronics kits benefit from the PC9RS08KA2PAE's sub-$3 price point, internal oscillator, and easy-to-learn RS08 instruction set. With 4 GPIO pins, designers can drive two DC motors via H-bridge, sense two limit switches, and add an LED indicator - all without external components. The 2 KB FLASH is enough for sound-effect bit-banging or simple PWM motor control loops, and the through-hole PDIP package makes the part ideal for educational kits, breadboard prototypes, and small-run production.
推薦
Industrial Replaceable Sensor Nodes
Disposable or short-lifecycle industrial sensors (process monitors, equipment health tags) use the PC9RS08KA2PAE as a single-chip solution: one GPIO for a sensor front-end, one for status LED, one for a one-wire ID, and one reserved. The internal oscillator, LVD, POR, and watchdog timer cover the four most common field-failure modes without external supervisor ICs. Designers using this part for industrial nodes should note that the -40 C to +85 C variant selection must be confirmed at order entry, since the operating temperature grade affects part number suffix.
推薦
推薦產品摘要
工程參考資料，適用於 PC9RS08KA2PAE — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PC9RS08KA2FPE | PC9RS08KA2DWE | MC9RS08KA2CSC | MC9RS08KA4CWJ | PIC10F200T-I/OT |
|---|---|---|---|---|---|---|
| Package | 8-PDIP (0.300 inch) | 8-SOIC - same pinout, SMT | 8-SOIC - same pinout, more memory | 8-SOIC - same pinout, automotive | 8-SOIC - same pinout, 4KB | SOT-23-6 - different footprint |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | Microchip Technology |
| Core | RS08 (8-bit) | RS08 (8-bit) | RS08 (8-bit) | RS08 (8-bit) | RS08 (8-bit) | PIC10 (8-bit) |
| Program Memory | 2 KB FLASH | 2 KB FLASH | 8 KB FLASH | 2 KB FLASH | 4 KB FLASH | 0.5 KB FLASH |
| RAM | 63 bytes | 63 bytes | 254 bytes | 63 bytes | 254 bytes | 16 bytes |
| Number of I/O | 4 (6 PTA pins, 2 Vdd/Vss) | 4 | 4 | 4 | 4 | 4 |
| Maximum CPU Speed | 10 MHz | 10 MHz | 10 MHz | 10 MHz | 10 MHz | 4 MHz |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Active |
主要差異化特點
- Lowest-cost RS08KA2 option with through-hole PDIP for prototyping (對比PC9RS08KA2FPE)
- Minimal BOM - no external crystal required (對比PIC10F200T-I/OT)
- Same footprint as higher-memory RS08KA family for code growth (對比PC9RS08KA2DWE)
設計說明
Place a 0.1 uF decoupling capacitor as close as possible to the Vdd pin (pin 7) and a bulk 10 uF capacitor on the supply rail. The PC9RS08KA2PAE's internal regulator and POR need clean supply edges at power-up; long, inductive supply traces can trigger spurious resets. For battery-powered applications, add a 100 kohm pull-up from Vdd to PTA2/RESET so the reset pin defaults high after the internal POR releases, then transition to GPIO only after firmware reconfigures the pin.
The 8-pin PDIP (0.300 inch) footprint is through-hole; reserve standard 2.54 mm pitch pad spacing and 0.65 mm drill for the leads. Keep the Vdd trace short and wide to minimize IR drop during GPIO transitions that source high peak currents. If migrating to the SOIC-8 footprint for production, allocate land patterns for both packages on early prototypes to ease code-validated drop-in substitution between PC9RS08KA2PAE (PDIP) and PC9RS08KA2FPE (SOIC).
Do not assume the internal oscillator is accurate enough for UART or USB timing - it typically calibrates to within a few percent but is not suitable for protocols requiring better than 2% accuracy. For applications requiring precise baud rates, either use the on-chip timer-based PWM/UART emulation or migrate to an external crystal-equipped RS08 variant. Also note that PTA2 doubles as the RESET pin by default; if your application needs PTA2 as GPIO, you must explicitly disable the RESET function in SOPT register per the manufacturer datasheet, otherwise the part will reset on every external low pulse.
Keep digital switching traces (relay drivers, LED PWM outputs) away from sensitive analog reference pins if you are using the internal bandgap as an ADC reference. Even though the PC9RS08KA2PAE has only six signal pins, layout separation prevents ground bounce from coupling into the supply sense. For best EMI performance, route Vss (pin 4) as a direct, low-inductance path to the system ground plane, ideally with a via adjacent to the pin.
合規資訊
RoHS / REACH / lead-free status for PC9RS08KA2PAE was not confirmed in the verified web data and should be verified at order entry by lot date code. The part is obsolete per distributor listings; NXP's product environmental compliance documents should be requested directly for production-grade designs.
