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NXP Semiconductors MC9RS08KB12CSG
- Part No.:
- MC9RS08KB12CSG
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MC9RS08KB12CSG.pdf
- Description:
- IC MCU 8BIT 12KB FLASH 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,305
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Product details
Overview
MC9RS08KB12CSG from NXP Semiconductors (formerly Freescale) is an 8-bit RS08 core microcontroller in a 24-pin QFN package, featuring 12 KB flash, 254-byte RAM, 10-bit ADC with 12 channels, and integrated peripherals including TPM, IIC, SCI, ACMP, and RTI. It operates from 1.8 V to 5.5 V at up to 20 MHz CPU frequency across –40 °C to +85 °C, targeting low-cost embedded control in consumer appliances and industrial sensors.
For engineers reviewing the MC9RS08KB12CSG datasheet, MC9RS08KB12CSG pinout, MC9RS08KB12CSG application, or MC9RS08KB12CSG equivalent, key selection criteria include its 24-pin QFN thermal performance (θJA = 113 °C/W), single-wire background debug interface, 0.2% internal clock trimming accuracy, stop-mode current of 1.4 µA (typical at 3 V), and support for LIN-compliant SCI operation.
Technical Context
The MC9RS08KB12CSG implements a subset of the HC08 instruction set with added BGND instruction and a single global interrupt vector, enabling deterministic real-time response. Its internal clock source (ICS) uses a frequency-locked loop (FLL) with precision-trimmed internal reference, delivering ±2% deviation over voltage and temperature while supporting bus frequencies up to 10 MHz.
System protection includes COP reset with dedicated 1 kHz low-power oscillator, low-voltage detection with configurable reset/interrupt, illegal opcode/address detection, and flash-block protection. Wakeup from Stop/Wait modes is supported via RTI, KBI, ADC, ACMP, SCI, and LVD - all functional in ultra-low-power states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | 8-bit RS08 with BGND instruction and single global interrupt vector - enables compact code footprint and deterministic interrupt latency. |
| Flash Memory | 12 KB on-chip flash with read/program/erase over full voltage (1.8–5.5 V) and temperature (–40 to +85 °C) - supports field firmware updates without external programming hardware. |
| RAM Size | 254 bytes of on-chip RAM - sufficient for real-time data buffering and stack depth in sensor-interface and motor-control applications. |
| ADC Resolution | 10-bit SAR ADC with 12 input channels and 2.5 µs conversion time - enables fast sampling of analog sensors (e.g., thermistors, potentiometers) with internal bandgap reference. |
| Supply Current (Stop) | 1.4 µA typical at 3 V - allows battery-powered devices to achieve multi-year shelf life in sleep-dominated duty cycles. |
| Package | 24-pin QFN (Case 1982-01, 4 × 4 mm, 0.5 mm pitch) with exposed pad - provides low thermal resistance (θJA = 113 °C/W) and compact PCB footprint. |
| Clock Accuracy | ±2% deviation over voltage and temperature using internal FLL with 0.2% resolution trimming - eliminates need for external crystal in cost-sensitive timing applications. |
Pinout & Package
MC9RS08KB12CSG is housed in a 24-pin QFN package (Case 1982-01) with 4 mm × 4 mm body, 0.5 mm pitch, and exposed thermal pad. Pin 1 is marked by a corner notch or dot; the package supports reflow soldering per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Primary 1.8–5.5 V supply rail; powers core, peripherals, and I/O; requires local decoupling near pin 1. |
| VSS | Ground reference | Digital ground return; must be connected to PCB ground plane with low-inductance path to exposed pad. |
| PTA0/KBIP0/TPMCH0/ADP0/ACMP+ | Multi-function GPIO | Configurable as keyboard interrupt input, TPM channel 0, ADC channel 0, or ACMP+ input - enables shared signal routing in space-constrained designs. |
| PTA4/ACMPO/BKGD/MS | Output-only terminal | ACMP output, background debug interface (BKGD), or master select - cannot be used as general-purpose input; critical for in-circuit debugging. |
| PTA5/TCLK/RESET/VPP | Input-only terminal | External trigger clock input, active-low reset, or high-voltage programming pin - internal clamp only to VSS; requires external pull-up for reset functionality. |
| PTB6/SDA/XTAL | Bi-directional I²C/oscillator | Default I²C data line or crystal oscillator input - remappable to PTA2/PTA3; supports standard-mode (100 kbps) I²C communication. |
Key Features
| Feature | Design Value |
|---|---|
| Single-wire background debug (BKGD) | Enables full in-circuit debugging (breakpoint, memory access, register inspection) using only one pin - reduces test point count and simplifies production programming. |
| 12-channel 10-bit ADC with temperature sensor | Integrated 1.7 mV/°C temperature sensor and internal bandgap reference allow self-calibrated thermal monitoring without external components. |
| Low-power stop mode (1.4 µA typ.) | Permits extended battery life in remote sensors; wakeup sources include ADC completion, keyboard interrupts, and serial activity - no external wake controller needed. |
| Hardware LIN-compliant SCI | Supports LIN 2.x frame formatting and 13-bit break detection - enables direct integration into automotive body electronics networks without protocol translation. |
| Configurable I/O drive strength | Programmable high/low drive modes per pin (e.g., 2 mA / 5 mA at 5 V) - optimizes EMI and power consumption for each peripheral interface. |
Applications
| Home Appliance Control | Industrial Sensor Node |
|---|---|
Use Scenario: Microcontroller in washing machine main control board managing motor sequencing, water level sensing, and user interface. IC Role / Device Role / Timing Role: Central system controller executing real-time motor PWM, reading analog pressure/temperature sensors via ADC, and communicating status via SCI to display module. Use Value: 12 KB flash accommodates complex wash-cycle logic and safety firmware; 254-byte RAM supports concurrent sensor buffering and UI state management. | Use Scenario: Battery-powered environmental monitor deployed in factory HVAC ducts measuring temperature, humidity, and air quality. IC Role / Device Role / Timing Role: Low-power data acquisition node performing periodic ADC reads, processing sensor data, and transmitting via I²C to gateway MCU. Use Value: Stop-mode current of 1.4 µA (typ.) extends 2-AA battery life beyond 5 years; integrated temperature sensor eliminates BOM cost of discrete thermal IC. |
| Smart Lighting Dimmer | Automotive Body Controller |
Use Scenario: LED driver module in commercial lighting fixture regulating brightness via TRIAC or MOSFET dimming circuits. IC Role / Device Role / Timing Role: PWM generator and zero-crossing detector interfacing with AC mains; handles user input via keyboard interrupt (KBI) and adjusts light intensity via TPM outputs. Use Value: TPM's edge-aligned and center-aligned PWM modes support both leading-edge and trailing-edge dimming; hysteresis on KBI pins rejects mechanical switch bounce. | Use Scenario: Door module controlling window lift, mirror adjustment, and interior lighting in entry-level vehicles. IC Role / Device Role / Timing Role: LIN slave node receiving commands from body control module (BCM) via SCI, driving motors and relays, and reporting switch status. Use Value: Native LIN-compliant SCI eliminates external transceiver; 18 GPIOs support direct connection to switches, motors, and LEDs without port expanders. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC9RS08KB8CSG | 8 KB flash, 254-byte RAM, identical package and peripheral set - reduced program memory only. | Suitable for simpler control tasks with smaller firmware footprints (e.g., basic timer-based appliances). | Select when application code size is < 8 KB and cost optimization is prioritized over future firmware scalability. |
| S9KEAZ128AMLH | ARM Cortex-M0+ core, 128 KB flash, 16 KB RAM, 50 MHz max, same 24-pin QFN - higher performance, larger memory, different architecture. | Required for applications needing floating-point math, USB connectivity, or RTOS support beyond RS08 capability. | Choose for migration paths requiring enhanced compute throughput or peripheral richness; not pin-compatible. |
Compared with MC9RS08KB8CSG, the MC9RS08KB12CSG offers 4 KB additional flash for feature-rich firmware and bootloader space; versus S9KEAZ128AMLH, it delivers lower power and simpler toolchain requirements but lacks ARM ecosystem compatibility and advanced peripherals.
Availability
MC9RS08KB12CSG is available at Aetrix Electronics and suitable for home appliance control, industrial sensor nodes, smart lighting dimmers, and automotive body controllers requiring stable component supply and long-term manufacturability.
Supply support for MC9RS08KB12CSG includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
NXP Semiconductors is a global semiconductor company formed from the spin-off of Philips' semiconductor division, now headquartered in Eindhoven, Netherlands, with design centers worldwide.
The MC9RS08KB12CSG belongs to NXP's RS08 microcontroller family, designed specifically for cost-sensitive, ultra-low-power embedded applications where small code size, minimal external components, and robust operation across industrial temperature ranges are essential.
FAQ
What is the maximum operating frequency of the MC9RS08KB12CSG CPU core?
The MC9RS08KB12CSG CPU core operates at up to 20 MHz across its full voltage range (1.8 V to 5.5 V) and temperature range (–40 °C to +85 °C). This frequency is achieved using either the internal clock source (ICS) with FLL or an external crystal/ceramic resonator connected to the XOSC pins. The bus frequency is limited to 10 MHz, which governs peripheral timing.
Does the MC9RS08KB12CSG support in-circuit debugging, and what interface is used?
Yes, the MC9RS08KB12CSG supports in-circuit debugging via a single-wire background debug (BKGD) interface. This interface uses the PTA4 pin and enables breakpoint setting, memory inspection, and register access during live operation. No additional debug headers or JTAG adapters are required - only a compatible BDM pod or debugger supporting RS08 protocol is needed.
What are the power-saving modes available on the MC9RS08KB12CSG, and how do they differ?
The MC9RS08KB12CSG offers Wait and Stop modes. In Wait mode, the CPU halts but system clocks continue running and voltage regulation remains active - allowing fast wakeup (< 1 µs) via peripherals like KBI or RTI. In Stop mode, all clocks stop and the voltage regulator enters standby, reducing current to 1.4 µA (typ. at 3 V); wakeup requires external event or internal module (e.g., ADC completion) and incurs longer latency.
Can the MC9RS08KB12CSG ADC operate while the device is in Stop mode?
Yes, the MC9RS08KB12CSG ADC can perform conversions in Stop mode. The ADC adder current increases total Stop-mode current by approximately 140 µA (typ. at 3 V), but the module retains full functionality - including automatic compare, hardware triggering, and use of internal bandgap reference - enabling low-power sensor polling without waking the CPU.
What is the function of the PTA5 pin on the MC9RS08KB12CSG, and why is it input-only?
The PTA5 pin on the MC9RS08KB12CSG serves as TCLK (external trigger clock), RESET (active-low reset input), and VPP (high-voltage programming input). It is designated input-only because internal circuitry connects it directly to reset logic and programming latches without output drivers. This prevents contention during reset assertion or flash programming and ensures reliable high-voltage signaling without risk of damage from accidental output drive.
MC9RS08KB12CSG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Series:
- RS08
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- RS08
- Core Size:
- 8-Bit
- Speed:
- 20MHz
- Connectivity:
- I2C, SPI
- Peripherals:
- LVD, POR, PWM, WDT
- Number of I/O:
- 14
- Program Memory Size:
- 12KB (12K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 254 x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 5.5V
- Data Converters:
- A/D 8x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MC9RS08KB12CSG FAQ
1.How can I place an order for MC9RS08KB12CSG through Aetrix?
Please submit a Request for Quotation (RFQ) for MC9RS08KB12CSG on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MC9RS08KB12CSG reliable?
The price and inventory of MC9RS08KB12CSG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC9RS08KB12CSG is usually 5 days.
3.What payment methods are accepted for MC9RS08KB12CSG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC9RS08KB12CSG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC9RS08KB12CSG?
MC9RS08KB12CSG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC9RS08KB12CSG order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MC9RS08KB12CSG?
For technical support, including MC9RS08KB12CSG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC9RS08KB12CSG requirements.
6.How does Aetrix verify that MC9RS08KB12CSG is sourced from the original manufacturer or authorized distributors?
All MC9RS08KB12CSG products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MC9RS08KB12CSG meets industry standards.
7.What is the process for return or replacement of MC9RS08KB12CSG?
All MC9RS08KB12CSG units undergo pre-shipment inspection (PSI). If there is an issue with MC9RS08KB12CSG, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MC9RS08KB12CSG part is unused and in its original packaging.
Return procedure for MC9RS08KB12CSG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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