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Renesas R5F21266SNFP#10
- Part No.:
- R5F21266SNFP#10
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
R5F21266SNFP#10.pdf
- Description:
- R8C26 MCU 32+2K 2.2/5.5V 32LQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
R5F21266SNFP#10 from Renesas Electronics is a 16-bit R8C/26 Group single-chip microcontroller with 32 KB flash program memory, 1.5 KB RAM, 12-channel 10-bit A/D converter, UART0/UART1 serial interfaces, and hardware LIN module - used in embedded control of office equipment, consumer audio devices, and industrial appliance subsystems.
For engineers reviewing the R5F21266SNFP#10 datasheet, R5F21266SNFP#10 pinout, R5F21266SNFP#10 application, or R5F21266SNFP#10 equivalent, this page delivers verified technical context, package mapping, real-world use scenarios, and validated alternative options for design-in and supply continuity planning.
Technical Context
The R5F21266SNFP#10 implements the R8C CPU core with 89 fundamental instructions and executes at 20 MHz (50 ns min instruction time) under 3.0–5.5 V supply. It integrates three independent clock generation circuits: XIN-based crystal oscillator, high-speed/low-speed on-chip oscillators (with frequency adjustment), and XCIN/XCOUT 32 kHz RTC support (N/D version only).
Peripheral integration includes Timer RA/RB (8-bit × 2), Timer RC (16-bit input capture/output compare), Timer RE (real-time clock + compare match), two UART channels, one I²C bus interface, one clock-synchronous serial I/O with chip select, and hardware LIN transceiver co-located on Timer RA and UART0.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C 16-bit architecture with 89 instructions and 1 Mbyte address space - enables compact code footprint and deterministic real-time execution. |
| Memory | 32 KB on-chip flash ROM + 1.5 KB RAM - sufficient for mid-complexity firmware with data buffering and interrupt stack usage. |
| A/D Converter | 10-bit resolution, 12 analog input channels - supports sensor monitoring (e.g., temperature, voltage, potentiometer) without external ADC. |
| Timers | Timer RA/RB (8-bit × 2), Timer RC (16-bit with input capture/output compare), Timer RE (RTC + compare match) - enables PWM generation, pulse-width measurement, and time-stamped event handling. |
| Serial Interfaces | UART0/UART1 (full-duplex), I²C bus interface, clock-synchronous serial I/O with chip select, hardware LIN module - provides flexible communication for sensor networks, display control, and automotive sub-bus interfacing. |
| Supply & Temp | Operating voltage: 3.0–5.5 V; ambient temperature range: –20°C to +85°C (N version) - suitable for commercial-grade indoor electronics with stable power rails. |
| Package | 32-pin LQFP (PLQP0032GB-A) - standard surface-mount footprint compatible with automated PCB assembly and thermal management up to 10 mA typical active current. |
Pinout & Package
Package: 32-pin molded-plastic LQFP (PLQP0032GB-A), 7 mm × 7 mm body, 0.8 mm pitch, exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC / VSS | Power supply input / ground | Primary digital power domain (2.2–5.5 V); requires local decoupling near pins 7 and 5 for noise suppression. |
| AVCC / AVSS | Analog power supply input / ground | Dedicated analog domain for A/D converter; must be isolated from digital ground and bypassed with capacitor. |
| XIN / XOUT | Crystal oscillator input / output | Supports 5–20 MHz crystal/resonator; enables precise system timing and clock synchronization across peripherals. |
| RESET | Active-low reset input | Hardware reset assertion resets CPU, peripherals, and registers; requires external pull-up and debouncing for robust operation. |
| P0_0–P0_7 | General-purpose I/O port | 8-bit bidirectional port with individual direction control; AN0–AN7 multiplexed for analog inputs to A/D converter. |
| AN8–AN11 | Analog input channels | Four additional A/D inputs mapped to P1_0–P1_3 - expands sensor interface capability without external muxing. |
| UART0 (TXD0/RXD0) | Asynchronous serial transmit/receive | Full-duplex UART channel on P1_4/P1_5 - used for debug logging, host MCU communication, or configuration interface. |
| UART1 (TXD1/RXD1) | Asynchronous serial transmit/receive | Second UART on P0_0/P3_7 (with mode-selectable pin assignment) - supports dual-serial topology or LIN physical layer framing. |
| SCL / SDA | I²C bus clock/data lines | Open-drain I²C interface on P3_5/P3_4 - enables connection to EEPROMs, sensors, and displays with standard protocol stack. |
| TREO | Timer RE output | Real-time clock output signal on P0_4 - provides periodic interrupt trigger or external timing reference for low-power wake-up. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware LIN Module | Integrated LIN 2.0/2.1 transceiver using Timer RA and UART0 - eliminates external LIN PHY, reduces BOM count, and simplifies compliance testing. |
| On-Chip Oscillators | High-speed and low-speed on-chip oscillators with frequency adjustment - enables rapid startup, clock redundancy, and reduced external component count. |
| XCIN/XCOUT RTC Support | 32 kHz crystal interface (N/D versions only) feeding Timer RE - delivers accurate real-time clock functionality without software overhead or external RTC IC. |
| LED Drive Ports | 8 dedicated LED drive pins on P1_0–P1_7 (N/D versions) - supports direct current-sinking LED control with programmable duty cycle via PWM timers. |
| Interrupt Architecture | 7 priority levels, 15 internal + 4 external + 4 software interrupt sources - enables deterministic response to time-critical events like fault detection or sensor triggers. |
Applications
| Office Equipment Control | Consumer Audio Interface |
|---|---|
|
Use Scenario: Embedded controller in multifunction printers managing paper feed, toner sensing, and panel button response. IC Role / Device Role / Timing Role: Primary system MCU executing real-time motor control, A/D-based sensor reading, and UART-based host communication. Use Value: Integrated 12-channel A/D and dual UART eliminate external converters and level shifters, reducing board area and component cost. |
Use Scenario: Front-panel controller in stereo receivers handling volume knob, source selection, and display updates. IC Role / Device Role / Timing Role: Dedicated UI processor with key interrupt inputs (KI0–KI3), LED drive ports, and I²C interface to DAC/display driver. Use Value: Hardware key interrupt and 8 LED drive pins enable responsive tactile feedback and status indication without GPIO bit-banging. |
| Industrial Appliance Subsystem | Automotive Body Control Node |
|
Use Scenario: Temperature and fan speed regulator in HVAC control modules within commercial kitchen equipment. IC Role / Device Role / Timing Role: Sensor fusion node aggregating thermistor readings (AN0–AN11), driving PWM fans (Timer RC), and reporting via UART. Use Value: 10-bit A/D resolution and 16-bit timer precision ensure stable closed-loop thermal regulation across operating temperature range. |
Use Scenario: Door module controller in entry-level vehicles managing window lift, mirror fold, and interior lighting. IC Role / Device Role / Timing Role: LIN slave node communicating with central body controller via hardware LIN module (UART0 + Timer RA). Use Value: Native LIN compliance reduces firmware complexity and ensures interoperability with OEM master nodes without protocol stack licensing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F21266SDFP | Same core, memory, and peripherals; rated for –40°C to +85°C (D version) vs. –20°C to +85°C (N version). | Required for extended-temperature industrial or automotive cabin environments where cold-start reliability is critical. | Select R5F21266SDFP when operating below –20°C is specified; otherwise R5F21266SNFP#10 suffices for commercial indoor use. |
| R5F21276SNFP | Identical R8C/26 footprint and peripherals but adds 2 × 1 KB data flash blocks (10,000 write cycles) - R5F21266SNFP#10 has no data flash. | Needed for field-upgradable calibration tables, user preferences, or firmware parameter storage requiring frequent non-volatile writes. | Choose R5F21276SNFP only if data flash endurance and retention are mandatory; R5F21266SNFP#10 remains optimal for fixed-parameter designs. |
Compared with R5F21266SNFP#10, R5F21266SDFP extends temperature range without altering pinout or firmware, while R5F21276SNFP adds data flash at same package - both require no PCB redesign but differ in qualification scope and non-volatile storage capability.
Availability
R5F21266SNFP#10 is available at Aetrix Electronics and suitable for office equipment control, consumer audio interface, and industrial appliance subsystems requiring stable component supply and long-term production support.
Supply support for R5F21266SNFP#10 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
Renesas Electronics Corporation is a global semiconductor leader specializing in microcontrollers, analog, and power solutions for industrial, automotive, and consumer markets.
The R8C/26 Group, including R5F21266SNFP#10, was designed for cost-sensitive, resource-constrained embedded control applications demanding integrated peripherals, low power, and proven reliability in commercial environments.
FAQ
What is the maximum operating frequency of the R5F21266SNFP#10?
The R5F21266SNFP#10 operates at up to 20 MHz with a minimum instruction execution time of 50 ns when supplied at 3.0–5.5 V. This frequency is achieved using the XIN crystal oscillator circuit; the on-chip high-speed oscillator supports adjustable frequencies but may exhibit higher tolerance drift than crystal-based timing.
Does the R5F21266SNFP#10 include data flash memory?
No, the R5F21266SNFP#10 belongs to the R8C/26 Group and contains only program flash memory (32 KB) and RAM (1.5 KB). Data flash (1 KB × 2 blocks) is exclusive to the R8C/27 Group, such as R5F21276SNFP. The R5F21266SNFP#10 relies on program flash for all non-volatile storage.
Which pins support analog input for the A/D converter in the R5F21266SNFP#10?
The R5F21266SNFP#10 supports 12 analog inputs: AN0–AN7 on P0_0–P0_7, and AN8–AN11 on P1_0–P1_3. All 12 channels connect directly to the internal 10-bit A/D converter without external signal conditioning required for standard sensor ranges (0–VREF).
Can the R5F21266SNFP#10 operate in low-power modes, and what are the typical current draws?
Yes, the R5F21266SNFP#10 supports wait and stop modes. Typical current consumption is 2.0 µA in wait mode (with 32 kHz XCIN clock active) and 0.7 µA in stop mode. These modes are controlled via system control registers and preserve RAM contents and selected peripheral states.
Is the R5F21266SNFP#10 pin-compatible with other R8C/26 Group MCUs?
Yes, all R8C/26 Group MCUs-including R5F21262SNFP, R5F21264SNFP, R5F21265SNFP, and R5F21266SNFP#10-share identical 32-pin LQFP (PLQP0032GB-A) packaging and pin assignments. Firmware and hardware designs are interchangeable across memory variants without layout changes.
R5F21266SNFP#10 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 32-LQFP
- Series:
- R8C/2x/26
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- R8C
- Core Size:
- 16-Bit
- Speed:
- 5MHz
- Connectivity:
- I2C, LINbus, SIO, SSU, UART/USART
- Peripherals:
- LED, POR, Voltage Detect, WDT
- Number of I/O:
- 25
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 1.5K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.2V ~ 5.5V
- Data Converters:
- A/D 12x10b
- Oscillator Type:
- External, Internal
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F21266SNFP#10 FAQ
1.How can I place an order for R5F21266SNFP#10 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F21266SNFP#10 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 R5F21266SNFP#10 reliable?
The price and inventory of R5F21266SNFP#10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F21266SNFP#10 is usually 5 days.
3.What payment methods are accepted for R5F21266SNFP#10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F21266SNFP#10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F21266SNFP#10?
R5F21266SNFP#10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F21266SNFP#10 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 R5F21266SNFP#10?
For technical support, including R5F21266SNFP#10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F21266SNFP#10 requirements.
6.How does Aetrix verify that R5F21266SNFP#10 is sourced from the original manufacturer or authorized distributors?
All R5F21266SNFP#10 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 R5F21266SNFP#10 meets industry standards.
7.What is the process for return or replacement of R5F21266SNFP#10?
All R5F21266SNFP#10 units undergo pre-shipment inspection (PSI). If there is an issue with R5F21266SNFP#10, 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 R5F21266SNFP#10 part is unused and in its original packaging.
Return procedure for R5F21266SNFP#10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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