PC9RS08KA2DWE - 8-Bit RS08 MCU, 2KB Flash, 10MHz | NXP
Référence : PC9RS08KA2DWE ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $1.85 | $1,85 |
| 10 | $1.62 | $16,20 |
| 100 | $1.34 | $134,00 |
| 500 | $1.12 | $560,00 |
| 1 000 | $0.97 | $970,00 |
PC9RS08KA2DWE Présentation
An RS08 microcontroller is a derivative of Freescale/NXP's HCS08 architecture, designed as a cost- and code-density-optimized 8-bit core for high-volume, ultra-low-cost embedded applications. RS08 devices retain the C-friendly S08 instruction set while reducing core area, making them the smallest and lowest-power members of the Freescale 8-bit portfolio. RS08 microcontrollers belong to the broader category of microcontrollers (MCU), which sit within embedded controllers and are essential building blocks of modern electronic systems.
Key features include a single voltage supply range of 1.8V to 5.5V, 4 I/O pins for compact sensor and switch interfaces, an internal oscillator that eliminates the need for an external crystal, and robust system protection through integrated LVD, POR, and WDT peripherals. The simplified S08 instruction set, augmented with the high-performance LDA, STA, and CLR instructions, delivers a balance of code density and execution speed for cost-sensitive designs.
The RS08 core uses a Von Neumann architecture with a simplified instruction pipeline and a reduced register file versus the full S08 family, targeting ultra-low-power and pin-constrained applications. The 10MHz bus speed at 5V provides ample throughput for sensor sampling, switch debouncing, and simple state-machine control, while the FLASH memory supports in-application reprogramming for field updates.
Typical applications include battery-powered household appliances, remote-control transmitters, LED lighting controllers, low-end toys and personal-care devices, simple sensor interfaces, and replacement of discrete logic in white goods. The wide 1.8V to 5.5V supply range and low pin count (8-SOIC) make it ideal for compact, single-cell or 3V/5V mains-derived designs.
When designing with this device, ensure the operating voltage stays within the 1.8V to 5.5V range and that adequate decoupling (typically 100nF plus bulk capacitance) is placed near the supply pin. The 4 available I/O pins limit the design to minimalist interfaces such as a single switch input, an LED output, and a one-wire or UART communication channel.
This page synthesizes distributor pricing, drop-in and footprint-compatible alternatives, and practical design notes not found in the manufacturer datasheet, helping engineers select and source the PC9RS08KA2DWE for new designs and legacy maintenance.
Alternatives de remplacement direct pour PC9RS08KA2DWE — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec PC9RS08KA2DWE (même facteur de forme et même empreinte) — différant par Instruction Set, Mounting Type, Package / Case, RAM Size.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PC9RS08KA4DWE
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PC9RS08KA1DWE
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PC9RS08KA8DWE
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PC9RS08LA8DWE
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MC9RS08KA2CSC
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PIC10F200T-I/OT
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PC9RS08KA2DWE Valeurs maximales et caractéristiques électriques
| Core | RS08 (8-Bit, S08-derived) |
| Program Memory Size | 2 KB (2K x 8) FLASH |
| RAM Size | 63 B (63 x 8) |
| Maximum CPU Frequency | 10 MHz |
| Supply Voltage Range | 1.8 V to 5.5 V |
| Number of I/O Pins | 4 |
| Oscillator Type | Internal |
| Peripherals | LVD, POR, WDT |
| Boîtier / Format | 8-SOIC (0.209", 5.30 mm Width) |
| Type de montage | Surface Mount |
| Instruction Set | S08 (subset) with LDA, STA, CLR extensions |
| Architecture | Von Neumann, reduced S08 |
| Packaging | Tube |
| Statut RoHS | Compliant (per NXP product page) |
Configuration des broches de PC9RS08KA2DWE
| Broche 1 | PTA0/TCLK — General-purpose I/O / external clock input |
| Broche 2 | PTA1 — General-purpose I/O |
| Broche 3 | VSS — Ground reference |
| Broche 4 | PTA2 — General-purpose I/O |
| Broche 5 | PTA3/RESET — General-purpose I/O / reset (shared) |
| Broche 6 | VDD — Positive supply voltage (1.8 V to 5.5 V) |
| Broche 7 | PTA4 — General-purpose I/O / BKGD/MS |
| Broche 8 | PTA5 — General-purpose I/O |
Applications typiques
PC9RS08KA2DWE convient pour 6 applications: Remote Control Transmitter, Small Household Appliance Controller, LED Lighting Controller, Low-End Toy and Personal Care Device, Simple Sensor Interface Module, Replacement of Discrete Logic in White Goods.
Remote Control Transmitter
The PC9RS08KA2DWE is well matched to IR/RF remote-control transmitter applications where ultra-low cost, single-cell battery operation, and a minimal pin count are critical. With 4 GPIO pins, an internal oscillator (no crystal needed), and 1.8 V to 5.5 V single-supply operation, the part can drive an IR LED directly through one GPIO and read a 4-button matrix on the remaining pins. The 2 KB FLASH comfortably holds key-scan debounce, IR protocol encoding (RC5/nec/SIRC), and a small sleep routine, while the integrated WDT handles lock-up recovery from battery brown-outs. Estimated: typical active current at 10 MHz is in the low single-digit mA range, enabling months of standby on two AAA cells.
Recommandé
Small Household Appliance Controller
In toasters, blenders, irons, coffee makers, and similar white-goods sub-modules, the PC9RS08KA2DWE replaces discrete logic and timers with a programmable state machine. Its 4 I/O pins handle a switch input, a relay/SSR drive, an LED indicator, and a buzzer or triac trigger, while 2 KB of FLASH holds timing curves and safety logic. The integrated LVD and POR protect against brown-outs during motor inrush, and the wide 1.8 V to 5.5 V supply allows direct connection to rectified 5 V or 3.3 V rails. Compared with a 555-timer or discrete logic implementation, this part enables firmware-based feature differentiation across SKUs without PCB changes.
Recommandé
LED Lighting Controller
Compact LED drivers, night lights, and decorative lighting strips benefit from the PC9RS08KA2DWE's small footprint and 1.8 V to 5.5 V supply range. The MCU can PWM one or two GPIO pins to drive MOSFETs for dimming or color mixing, while a third GPIO reads a touch or push-button input and the fourth drives a status LED. With 2 KB of FLASH, breathing-effect curves, color sequences, and low-power sleep modes fit comfortably. Internal oscillator eliminates the BOM cost of a crystal, and the SOIC-8 footprint is hand-solderable for prototyping and small-batch production runs.
Recommandé
Low-End Toy and Personal Care Device
Battery-powered toys, electronic toothbrushes, and personal-care appliances need a low-cost MCU that fits in an 8-pin SOIC. The PC9RS08KA2DWE offers 2 KB of FLASH for sound-effect sequencing, motor PWM, and battery monitoring through the integrated LVD. Its 4 GPIO pins can drive two motors via MOSFETs in H-bridge configuration plus two push-button inputs. Single 1.8 V to 5.5 V supply supports direct connection to alkaline or NiMH battery packs, and the internal WDT recovers the MCU from motor-induced brown-outs, improving field reliability.
Recommandé
Simple Sensor Interface Module
Sensor readout modules such as single-channel temperature, humidity, or contact-switch interfaces fit naturally on the PC9RS08KA2DWE. One GPIO can be configured as a one-wire or UART TX for data output, another reads the sensor, and the remaining two handle power-mode selection and an interrupt. The 10 MHz CPU at 5 V is fast enough to bit-bang simple protocols without needing a dedicated peripheral, and 63 bytes of RAM is sufficient for short sample buffers. The integrated POR ensures deterministic startup after power connection in field-deployed sensors.
Recommandé
Replacement of Discrete Logic in White Goods
Many legacy white-goods designs use 74HC-series logic or 555 timers that can be replaced by a single PC9RS08KA2DWE to add programmability and reduce component count. The MCU can debounce mechanical switches, generate timed sequences, multiplex LEDs, and provide watchdog supervision all in one 8-pin SOIC. With 2 KB of FLASH, simple firmware replaces 30 to 50 discrete components, reducing PCB area and BOM cost while improving reliability via the integrated WDT, LVD, and POR peripherals.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PC9RS08KA2DWE — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PC9RS08KA4DWE | PC9RS08KA1DWE | PC9RS08KA8DWE | PC9RS08LA8DWE | MC9RS08KA2CSC | PIC10F200T-I/OT |
|---|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | Microchip Technology |
| Package | 8-SOIC (5.30 mm) | 8-SOIC (5.30 mm) - same | 8-SOIC (5.30 mm) - same | 8-SOIC (5.30 mm) - same | 8-SOIC (5.30 mm) - same | 8-SOIC (5.30 mm) - same | SOT-23-6 (adapter required) |
| Core | RS08 (8-bit) | RS08 (8-bit) | RS08 (8-bit) | RS08 (8-bit) | RS08 (8-bit) | RS08 (8-bit) | PIC (8-bit) |
| Program Memory (FLASH) | 2 KB | 4 KB | 1 KB | 8 KB | 8 KB | 2 KB | 0.5 KB |
| RAM Size | 63 B | 63 B | 63 B | 63 B | 63 B | 63 B | 16 B |
| Maximum CPU Frequency | 10 MHz | 10 MHz | 10 MHz | 10 MHz | 20 MHz | 10 MHz | 4 MHz |
| Supply Voltage Range | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 2.0 V to 5.5 V |
| Number of I/O Pins | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Oscillator Type | Internal | Internal | Internal | Internal | Internal | Internal | Internal |
| Integrated Peripherals | LVD, POR, WDT | LVD, POR, WDT | LVD, POR, WDT | LVD, POR, WDT | LVD, POR, WDT | LVD, POR, WDT | WDT, POR |
Principaux différenciateurs
- Larger FLASH option available within same family and footprint (vs PC9RS08KA8DWE)
- Lower-cost sub-variant for minimal firmware (vs PC9RS08KA1DWE)
- Cross-vendor migration path to active product line (vs PIC10F200T-I/OT)
- Industrial-temperature variant of same die (vs MC9RS08KA2CSC)
Notes de conception
The PC9RS08KA2DWE operates from a single 1.8 V to 5.5 V rail. Place a 100 nF decoupling capacitor as close as possible to the VDD pin (pin 6), with a bulk capacitor (1 uF to 10 uF) on the same rail. The internal POR ensures a clean reset at power-up, but external bulk capacitance helps the MCU ride through motor inrush events common in appliance designs. Estimated: active current at 10 MHz is in the low single-digit mA range; deep-sleep current is significantly lower, supporting months of standby on battery.
In the 8-SOIC package, the exposed die pad is not present, so standard SOIC-8 land patterns are used directly. Pin 1 (PTA0/TCLK) is the default location for the background-debug-mode pin used for in-circuit programming. Reserve this pin or share it with a low-impedance signal so that the BKGD/MS interface remains accessible during production programming. Keep the BKGD trace short and away from high-current switching nodes to avoid debug-session interference.
Do not assume that all 8-SOIC variants of the RS08KA family share the same pinout across sub-families (KA1/KA2/KA4/KA8 versus LA8). Verify pin 5 (PTA3/RESET) configuration in the datasheet: on some variants RESET is shared with GPIO, on others it is dedicated. Exceeding the 5.5 V maximum supply will permanently damage the device; the integrated LVD only protects against undervoltage, not overvoltage. When migrating firmware between KA1/KA2/KA4/KA8, check FLASH address maps for boundary differences and recompile with the correct linker script.
Place the PC9RS08KA2DWE near the connector or switch it controls to minimize the loop area between MCU GPIO, MOSFET gate, and load. Keep the VDD trace wide enough to handle the inrush of bulk capacitance; a 0.5 mm trace width on standard 1 oz copper is generally adequate for the MCU's milliamp-level currents. Avoid routing the RESET/BKGD pin near switching-node signals that couple capacitively into the debug interface.
Informations de conformité
RoHS and REACH compliance stated by NXP product listings. The RS08KA family is not AEC-Q100 qualified; it targets consumer and industrial white-goods markets. Halogen-free status not explicitly listed - set to unknown per data authenticity rules.
