MC9RS08KA1CDBR - 8-bit RS08 MCU, 1KB Flash, 6-DFN | NXP (Tape & Reel)
N.º de pieza: MC9RS08KA1CDBR ✗ Fin de vida| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $2.49 | $2,49 |
| 10 | $2.37 | $23,70 |
| 100 | $2.25 | $225,00 |
| 500 | $2.15 | $1.075,00 |
| 1.000 | $2.05 | $2.050,00 |
MC9RS08KA1CDBR Descripción general
An entry-level 8-bit microcontroller (MCU) is the smallest class of programmable system-on-chip: it combines a processor core, program flash, data RAM, clock generation, reset supervision, and a few peripherals on one die. Within the hierarchy of embedded processors - MCU -> microcontroller unit -> embedded IC -> semiconductor - ultra-low-end MCUs like the RS08KA family target applications where a discrete logic solution would otherwise be used, replacing glue logic and analog timers with reprogrammable silicon at a comparable cost.
Key features include the simplified S08-derived RS08 instruction set with high-performance LDA, STA, and CLR instructions, 1KB of on-chip flash (self-programmable), an analog comparator (ACMP), low-voltage inhibit (LVI) and power-on reset (POR) supervision, and multiple low-power modes. Supply operation spans 2.5V, 3.3V, and 5V rails, which simplifies integration into both legacy 5V systems and modern 3.3V designs.
Architecturally, the RS08 core is a cost-reduced derivative of the industry-proven S08 (HC08 lineage) core from Freescale Semiconductor, now part of NXP Semiconductors. CISC-style addressing keeps code density high, important when program space is only 1KB. System protection features - COP watchdog, LVI, and POR - reduce external component count in cost-sensitive appliances and small consumer products.
Typical applications include small appliance control, LED lighting and dimming, battery charger supervision, timer and sequencer replacement, and simple human-interface functions in cost-driven consumer electronics. The 3x3 mm 6-DFN footprint suits extremely space-constrained boards.
Design consideration: this part is End-of-Life per the NXP product page, so new designs should verify remaining supply or plan a migration path; the 6-DFN footprint is shared with the pin-compatible MC9RS08KA2CDB, which doubles flash to 2KB.
This page synthesizes distributor pricing, drop-in alternative data, lifecycle status, and practical design notes not found in the manufacturer datasheet alone.
Alternativas directas para MC9RS08KA1CDBR — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con MC9RS08KA1CDBR (mismo factor de forma y huella) — difiere en Package, Maximum CPU Frequency, Maximum Clock Frequency, RoHS Status, Instruction Set.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
MC9RS08KA2CDB
✅ Sustitución directa✓ En stock
$1.75 / unidad
Ver hoja de datos →MC9RS08KA1CDBR Valores máximos y características eléctricas
| Core Processor | RS08 (8-bit CISC) |
| Core Size | 8-bit |
| Frecuencia de reloj máxima | 10 MHz |
| Flash Memory | 1 KB (1K x 8) |
| RAM | 128 bytes |
| Tensión de alimentación | 2.5 V / 3.3 V / 5 V operation |
| General Purpose I/O | 6 GPIO pins |
| Analog Comparator (ACMP) | Yes, integrated |
| Low Voltage Inhibit (LVI) | Yes |
| Power-On Reset (POR) | Yes |
| Encapsulado | 6-DFN with Exposed Pad (3x3 mm), QFN 6 |
| Tipo de montaje | Surface Mount |
| Product Series | MC9RS08KA (RS08KA) |
| Estado del ciclo de vida | End of Life (per NXP product page) |
| Instruction Set Features | Simplified S08 set with LDA, STA, CLR high-performance instructions |
Guía de configuración de pines de MC9RS08KA1CDBR 6-dfn with exposed pad (3x3 mm), qfn 6
Configuración de pines para MC9RS08KA1CDBR (encapsulado 6-dfn with exposed pad (3x3 mm), qfn 6). Este CI digital incluye GPIO, interfaces de comunicación (UART, SPI, I2C) y pines de alimentación. Consulte la hoja de datos del fabricante para conocer las funciones alternativas de los pines y las opciones de configuración. Esencial para el diseño de sistemas embebidos y el diseño de PCB.
No hay datos detallados de patillaje disponibles para MC9RS08KA1CDBR.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
MC9RS08KA1CDBR es adecuado para 6 aplicacións: Small Appliance Control, LED Lighting and Dimming Control, Battery Charger Supervision, Timer and Sequencer Replacement (Glue Logic Displacement), Human Interface and Touch-Adjacent Functions in Consumer Electronics, Industrial Sensor Level Detection.
Small Appliance Control
Cost-sensitive appliances such as coffee makers, kettles, and small fans need only a few digital outputs, a simple user interface, and basic timing - exactly the profile of the MC9RS08KA1CDBR. Its 6 GPIO pins cover LED indicators, relay or triac drive, and one or two switch inputs, while the integrated analog comparator and LVI/POR supervision eliminate external supervisory components. Operating from a 5V rail keeps it compatible with legacy appliance power supplies. The 1KB flash is sufficient for state-machine control code. The main consideration today is End-of-Life status: for ongoing appliance production, MC9RS08KA2CDB offers a pin-to-pin drop-in with 2KB flash on the identical 6-DFN 3x3 mm footprint.
Recomendado
LED Lighting and Dimming Control
The MC9RS08KA1CDBR fits LED lamp drivers and dimmers where PWM generation plus one analog input suffice. The integrated analog comparator can monitor current-sense voltages for basic over-current protection or level detection without an external comparator IC, while firmware-generated PWM drives the LED string switch. The 3x3 mm 6-DFN exposed-pad package fits into lamp base and driver PCBs where height and area are constrained, and 2.5V/3.3V/5V supply options match typical off-line driver auxiliary rails. Because code space is only 1KB, dimming algorithms must be lean state machines. Designers still in production should prefer MC9RS08KA2CDB (same footprint, 2KB flash) given the EOL status of the KA1 variant.
Recomendado
Battery Charger Supervision
In low-cost chargers, the MC9RS08KA1CDBR provides charge-state sequencing, LED indication, and termination detection. The analog comparator monitors the sense voltage against an internal reference to detect full-charge thresholds, LVI guards against brown-out during charge transients, and POR guarantees a defined startup state when the pack is inserted. The 6 GPIO pins drive charge-enable, indicator LEDs, and a thermistor-switched input. Its 5V operation matches common charger adapter rails directly. With only 1KB of flash, termination algorithms must use fixed thresholds rather than learned profiles. As the part is End of Life, new charger designs should verify drop-in availability of MC9RS08KA2CDB or migrate to the active MC9S08 family.
Recomendado
Timer and Sequencer Replacement (Glue Logic Displacement)
A classic RS08KA use case is replacing 555 timers, RC delay networks, counters, and discrete logic with one programmable 3x3 mm device. The MC9RS08KA1CDBR's 10 MHz RS08 core executes timing loops with far better accuracy than RC networks, and firmware changes implement new delays or sequences without a board respin. Six GPIO pins handle input triggers and output drives, while LVI and POR ensure deterministic behavior at power-up - an advantage over analog timers that can mis-trigger during slow ramps. The 2.5V/3.3V/5V range lets one design serve multiple rail voltages. For programs expected to run many years, evaluate the pin-compatible MC9RS08KA2CDB or an active NXP MCU because this part is End of Life.
Recomendado
Human Interface and Touch-Adjacent Functions in Consumer Electronics
Small consumer products - shavers, trimmers, toy controllers, novelty lighting - need a few button reads, LED effects, and a motor or buzzer output. The MC9RS08KA1CDBR covers this with 6 GPIO, a comparator usable for simple button or sensor level detection, and firmware PWM for effects. The 6-DFN 3x3 mm package keeps the controller nearly invisible on densely populated boards, and 1KB flash suffices for mode-switching firmware. Cost per function is the decisive factor here, and this ultra-low-end MCU undercuts larger parts while retaining full flash reprogrammability. Given End-of-Life status, volume consumer projects should design in MC9RS08KA2CDB (drop-in, 2KB flash) or an active MC9S08/Kinetis part for supply continuity.
Recomendado
Industrial Sensor Level Detection
Simple industrial nodes - limit switches, level sensors, thermal flags - benefit from the MC9RS08KA1CDBR's integrated analog comparator, which thresholds a sensor input directly against a reference, with firmware adding hysteresis and output qualification that analog comparators alone cannot provide. LVI and POR protect against unreliable decisions during supply sag, important on long cable runs in factory environments. The 5V supply compatibility matches industrial logic levels, and the small 6-DFN package fits into sensor head housings. With only 1KB flash, firmware must stay deterministic and small. For new industrial designs, note the End-of-Life status and consider the pin-compatible MC9RS08KA2CDB as a drop-in, or the active MC9S08 family for long-term sourcing.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MC9RS08KA1CDBR — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | MC9RS08KA2CDB | MC9RS08KA1CPC |
|---|---|---|---|
| Package | 6-DFN-EP (3x3 mm) | 6-DFN-EP (3x3 mm) - same | 8-PDIP - different package |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors (NXP USA Inc.) |
| Core | RS08 8-bit CISC | RS08 8-bit CISC | RS08 8-bit CISC |
| Flash Memory | 1 KB | 2 KB | 1 KB |
| Max Clock Frequency | 10 MHz | 10 MHz | 10 MHz |
| Mounting Type | Surface Mount | Surface Mount | Through Hole |
| Lifecycle Status | End of Life | Active (per NXP product page) | Obsolete (per Xecor comparison) |
Diferenciadores clave
- Smallest memory option in the RS08KA family for lowest system cost (frente a MC9RS08KA2CDB)
- Surface-mount 3x3 mm footprint vs through-hole sibling (frente a MC9RS08KA1CPC)
- Integrated analog comparator reduces external BOM (frente a MC9RS08KA1CPC)
Notas de diseño
This device is designated End of Life on the NXP product page. Before committing it to any design or continuing an existing BOM, check NXP's Product Change Notice and last-order dates on the official product page, then secure last-time-buy stock or qualify the pin-compatible MC9RS08KA2CDB. Distributor stock such as Heisener's 275,052 pieces is finite and date codes should be verified, since independent-channel stock for EOL parts can include reclaimed units.
The 6-DFN exposed-pad package requires the center thermal/electrical pad to be soldered to a matching copper land pattern - typically tied to VSS per the datasheet land-pattern guidance. Follow NXP's recommended footprint for the 3x3 mm DFN: an exposed-pad solder mask opening with several vias to the ground plane to aid heat dissipation and ensure reliable reflow. Verify paste aperture segmentation on the exposed pad to avoid voiding and part float during reflow of this small, lightweight package.
The device supports 2.5V, 3.3V, and 5V operation, but the LVI trip thresholds are fixed per supply-option ordering configuration. Confirm that your operating rail matches the voltage option specified in the ordering part number suffix before relying on LVI protection. Place a 0.1uF ceramic decoupling capacitor directly across the supply pins, as close to the package as possible; with only six pins, routing discipline around the exposed pad is essential for a clean comparator reference.
Información de cumplimiento
NXP product page lists an Environmental Quality section for this part, but specific RoHS/REACH/lead-free status was not present in the verified source data. Consult the NXP product page Environmental tab for authoritative compliance data.
