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NXP Semiconductors MC9RS08KB8CSG
- Part No.:
- MC9RS08KB8CSG
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MC9RS08KB8CSG.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,367
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Product details
Overview
MC9RS08KB8CSG from NXP Semiconductors (formerly Freescale) is an 8-bit RS08 core microcontroller with 8 KB flash, 254-byte RAM, and integrated peripherals including 10-bit ADC, analog comparator, TPM timer/PWM, IIC, SCI, and keyboard interrupt module. It operates from 1.8 V to 5.5 V at up to 20 MHz CPU frequency and supports industrial temperature range (–40 °C to 85 °C). Used in low-cost sensor interface and embedded control applications.
For engineers reviewing the MC9RS08KB8CSG datasheet, MC9RS08KB8CSG pinout, MC9RS08KB8CSG application, or MC9RS08KB8CSG equivalent, this page delivers verified technical context, package mapping, real-world use scenarios, and validated alternative options for cost-optimized, low-power 8-bit MCU selection in space-constrained designs.
Technical Context
The MC9RS08KB8CSG implements a subset of the HC08 instruction set with added BGND instruction and single global interrupt vector. Its internal clock source (ICS) uses a frequency-locked loop (FLL) with precision trimming enabling ±0.2% resolution and ±2% deviation over voltage and temperature, supporting bus frequencies up to 10 MHz.
System protection includes COP reset with dedicated 1 kHz low-power oscillator, low-voltage detection with reset/interrupt, illegal opcode/address detection, and flash-block protection. Power management offers Wait mode (clocks active, CPU halted) and Stop mode (clocks stopped, regulator in standby), with wakeup via RTI, KBI, ADC, ACMP, SCI, or LVD.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | RS08 8-bit architecture with BGND instruction and single global interrupt vector |
| Flash Memory | 8 KB on-chip flash with read/program/erase over full operating voltage (1.8–5.5 V) and temperature (–40 °C to 85 °C) |
| RAM Size | 254 bytes of on-chip RAM, retained down to 0.81 V supply |
| ADC | 12-channel, 10-bit SAR ADC with 2.5 μs conversion time, internal bandgap reference, temperature sensor (1.7 mV/°C), and stop-mode operation |
| Operating Voltage | 1.8 V to 5.5 V - enables direct interface with 1.8 V logic, 3.3 V sensors, and 5 V legacy peripherals |
| Package | 24-pin QFN (Case 1982-01), 4 mm × 4 mm, 0.5 mm pitch, exposed thermal pad |
| GPIO Count | 18 general-purpose I/O pins with configurable pull-up/pull-down, hysteresis, slew rate, and drive strength |
Pinout & Package
MC9RS08KB8CSG is housed in a 24-pin QFN package (Case 1982-01) with 4 mm × 4 mm body, 0.5 mm lead pitch, and exposed thermal pad for enhanced thermal performance in compact PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power Supply | Main digital supply input (1.8–5.5 V); powers core, peripherals, and I/O |
| VSS | Ground Reference | Digital ground return; must be connected to low-impedance system ground plane |
| PTA0/KBIP0/TPMCH0/ADP0/ACMP+ | Multi-function Port A Pin 0 | Configurable as keyboard interrupt input, TPM channel 0, ADC input 0, or ACMP+ input |
| PTA4/ACMPO/BKGD/MS | Output-only Pin | ACMP output, background debug interface (single-wire BDC), and master select - not usable as general-purpose I/O |
| PTA5/TCLK/RESET/VPP | Input-only Pin | External trigger clock input, active-low reset, and high-voltage programming pin - no output capability |
| PTB6/SDA/XTAL | Multi-function Port B Pin 6 | Default IIC data line or crystal oscillator input; remappable to alternate functions |
| PTB7/SCL/EXTAL | Multi-function Port B Pin 7 | Default IIC clock line or crystal oscillator external terminal; remappable per configuration |
Key Features
| Feature | Design Value |
|---|---|
| Single-wire background debug (BDC) | Enables in-circuit debugging and flash programming using only BKGD pin - reduces test point count and simplifies board layout |
| Integrated analog comparator (ACMP) | Rail-to-rail operation with internal bandgap reference option; supports wake-from-stop functionality for ultra-low-power threshold detection |
| Flexible clock system | Combines internal FLL (up to 10 MHz bus) and external crystal/ceramic oscillator (31.25 kHz–16 MHz) - eliminates need for external clock generator |
| Low-power modes with fast wake | Stop mode draws ≤7.67 μA at 5 V; wake sources include RTI, KBI, ADC, ACMP, SCI, and LVD - ideal for battery-powered sensing nodes |
| On-chip security circuitry | Prevents unauthorized access to flash contents - protects firmware IP in production devices without external encryption hardware |
Applications
| Smart Sensor Node | Industrial Control Panel |
|---|---|
Use Scenario: Battery-powered environmental sensor collecting temperature, humidity, and motion data with periodic wireless transmission. IC Role / Device Role / Timing Role: Central controller managing ADC sampling, ACMP-based wake-on-event, SCI UART communication, and low-power state transitions. Use Value: 7.67 μA Stop mode current and wake-from-stop ACMP enable multi-year battery life; 8 KB flash accommodates sensor fusion algorithms and OTA update buffer. | Use Scenario: Front-panel interface for HVAC or PLC systems requiring pushbutton inputs, LED status indicators, and serial communication to main controller. IC Role / Device Role / Timing Role: Dedicated keyboard interrupt handler with debounce, LED PWM dimming via TPM, and SCI-based command/response protocol. Use Value: 8 KB flash stores localized UI logic and fault-handling routines; 18 GPIOs support 8-key matrix + 6 LEDs + 4 status lines without external logic. |
| White Goods Appliance Control | Medical Diagnostic Handheld |
Use Scenario: Motor timing, door lock actuation, and user interface in washing machine or dishwasher control board. IC Role / Device Role / Timing Role: Real-time motor phase timing via TPM PWM outputs, KBI for rotary encoder/button inputs, and ADC for thermistor-based temperature monitoring. Use Value: 10-bit ADC with internal bandgap reference ensures accurate temperature measurement across 1.8–5.5 V supply range; robust ESD rating (±2 kV HBM) withstands factory handling. | Use Scenario: Portable blood glucose meter or pulse oximeter requiring precise analog front-end control and low-power operation between measurements. IC Role / Device Role / Timing Role: ADC acquisition controller with automatic compare, ACMP-based battery low-voltage warning, and SCI for USB-to-serial bridge communication. Use Value: Integrated 1.7 mV/°C temperature sensor enables on-chip calibration; 254-byte RAM provides sufficient buffer for dual-channel ADC data before transfer. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC9RS08KB12CSG | 12 KB flash, same 24-pin QFN package, identical peripheral set and pinout | Supports larger firmware images and more complex control algorithms without layout change | Select when future firmware growth or additional feature sets (e.g., expanded communication protocols) are anticipated |
| S9KEAZ128AMLH | Kinetis E-series ARM Cortex-M0+, 128 KB flash, 16 KB RAM, 48-pin LQFP - higher performance, different architecture and toolchain | Targets applications requiring >10 MHz deterministic response, floating-point math, or CAN/LIN physical layer support | Choose for migration path beyond 8-bit constraints; requires PCB redesign and software re-architecture |
Compared with MC9RS08KB12CSG, the MC9RS08KB8CSG trades 4 KB flash for lower unit cost while retaining identical peripherals, power profile, and footprint - making it optimal for volume production where firmware size is tightly constrained. S9KEAZ128AMLH offers architectural scalability but introduces significant design overhead.
Availability
MC9RS08KB8CSG is available at Aetrix Electronics and suitable for smart sensor nodes, industrial control panels, white goods appliance control, and medical diagnostic handhelds requiring stable component supply and long-term manufacturability.
Supply support for MC9RS08KB8CSG 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 leader focused on secure connectivity solutions for automotive, industrial, IoT, mobile, and communication infrastructure markets.
The MC9RS08KB8CSG belongs to the RS08 family - a cost-optimized, ultra-low-power 8-bit MCU line designed for simple embedded control tasks where minimal code size, low active/idle current, and small footprint are critical.
FAQ
What is the maximum operating frequency of the MC9RS08KB8CSG CPU core?
The MC9RS08KB8CSG CPU core runs at up to 20 MHz across its full operating voltage range (1.8 V to 5.5 V) and temperature range (–40 °C to 85 °C). The bus frequency is limited to 10 MHz when using the internal clock source (ICS) with FLL, but external crystal oscillators support higher CPU speeds directly.
Does the MC9RS08KB8CSG support in-circuit debugging, and what interface is used?
Yes, the MC9RS08KB8CSG supports in-circuit debugging via a single-wire background debug interface (BDC) using the BKGD pin (PTA4). This allows full flash programming, breakpoint setting, and real-time register inspection without requiring additional debug pins or JTAG hardware.
What analog peripherals are integrated into the MC9RS08KB8CSG?
The MC9RS08KB8CSG integrates a 12-channel, 10-bit ADC with 2.5 μs conversion time, internal bandgap reference, and 1.7 mV/°C temperature sensor; plus a rail-to-rail analog comparator (ACMP) with selectable internal bandgap reference input and stop-mode operation capability.
Can the MC9RS08KB8CSG operate from a 1.8 V supply, and what features remain functional?
Yes, the MC9RS08KB8CSG operates from 1.8 V minimum supply. At 1.8 V, the CPU runs up to 20 MHz, ADC remains fully functional (including temperature sensor), ACMP operates in stop mode, and all GPIOs retain configurable pull-up/pull-down and hysteresis - enabling true single-supply 1.8 V system design.
What package type and pin count does the MC9RS08KB8CSG use, and is thermal pad connection required?
The MC9RS08KB8CSG uses a 24-pin QFN package (Case 1982-01), 4 mm × 4 mm body with 0.5 mm pitch and exposed thermal pad. The thermal pad must be soldered to a PCB copper pour tied to VSS for reliable thermal dissipation and optimal electrical noise immunity - omission risks overheating and signal integrity issues.
MC9RS08KB8CSG 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:
- 8KB (8K 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:
MC9RS08KB8CSG FAQ
1.How can I place an order for MC9RS08KB8CSG through Aetrix?
Please submit a Request for Quotation (RFQ) for MC9RS08KB8CSG 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 MC9RS08KB8CSG reliable?
The price and inventory of MC9RS08KB8CSG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC9RS08KB8CSG is usually 5 days.
3.What payment methods are accepted for MC9RS08KB8CSG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC9RS08KB8CSG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC9RS08KB8CSG?
MC9RS08KB8CSG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC9RS08KB8CSG 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 MC9RS08KB8CSG?
For technical support, including MC9RS08KB8CSG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC9RS08KB8CSG requirements.
6.How does Aetrix verify that MC9RS08KB8CSG is sourced from the original manufacturer or authorized distributors?
All MC9RS08KB8CSG 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 MC9RS08KB8CSG meets industry standards.
7.What is the process for return or replacement of MC9RS08KB8CSG?
All MC9RS08KB8CSG units undergo pre-shipment inspection (PSI). If there is an issue with MC9RS08KB8CSG, 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 MC9RS08KB8CSG part is unused and in its original packaging.
Return procedure for MC9RS08KB8CSG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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