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Renesas R5F21257SYFP#U0
- Part No.:
- R5F21257SYFP#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 52-LQFP
- Datasheet:
-
R5F21257SYFP#U0.pdf
- Description:
- IC MCU 16BIT 48KB FLASH 52LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:5,350
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Product details
Overview
R5F21257SYFP#U0 from Renesas Electronics is a 16-bit R8C/Tiny Series single-chip microcontroller in a 52-pin LQFP package (PLQP0052JA-A), featuring 48 KB flash program memory, 2.5 KB RAM, and dual 1 KB data flash blocks. It integrates a 10-bit 12-channel ADC, UART0/UART1, I²C bus interface, hardware LIN module, real-time clock (Timer RE), and low-power stop mode (0.7 µA). It targets embedded control in consumer appliances requiring robust timing, serial communication, and analog sensing.
For engineers reviewing the R5F21257SYFP#U0 datasheet, R5F21257SYFP#U0 pinout, R5F21257SYFP#U0 application, or R5F21257SYFP#U0 equivalent, key selection criteria include its Y-version extended temperature range (–20°C to +105°C), on-chip high-speed oscillator with frequency adjustment, dual data flash for EEPROM emulation, and LIN-compliant UART0+Timer RA pairing - all validated for industrial-grade appliance control.
Technical Context
The R5F21257SYFP#U0 implements the R8C/Tiny CPU core with 89 fundamental instructions and executes at 50 ns minimum instruction time (20 MHz XIN, 3.0–5.5 V). Its memory architecture separates 48 KB flash program ROM from two independent 1 KB data flash blocks, enabling wear-leveling and nonvolatile parameter storage without external EEPROM.
Peripheral integration includes Timer RD (16-bit × 2 channels with input capture/output compare), Timer RE (real-time clock with compare match), and dedicated LIN hardware using UART0 and Timer RA - all mapped to specific pins (e.g., P1_4/TXD0, P1_5/RXD0, P1_7/TRAIO) confirmed in the PLQP0052JA-A pinout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C/Tiny 16-bit, 89 instructions, 20 MHz max operation (50 ns min instruction time) |
| Memory | 48 KB flash program ROM + 2 × 1 KB data flash blocks + 2.5 KB RAM |
| ADC | 10-bit resolution, 12 input channels (AN0–AN11), referenced to internal or external VREF |
| Timers | Timer RA/RB (8-bit × 2), Timer RD (16-bit × 2 with I/O capture/compare), Timer RE (RTC + compare) |
| Serial Interfaces | UART0/UART1 (2 channels), I²C bus interface, clock synchronous serial I/O with chip select (SSI/SCS/SSCK/SSO) |
| Operating Range | –20°C to +105°C (Y version), supply voltage 2.2–5.5 V, stop mode current 0.7 µA @ 3.0 V |
| Package | 52-pin LQFP (PLQP0052JA-A), 10 mm × 10 mm, 0.65 mm pitch |
Pinout & Package
Package: 52-pin molded-plastic LQFP (PLQP0052JA-A), 10 mm × 10 mm body, 0.65 mm pin pitch. Pin functions verified per Renesas document REJ03B0117-0300, Figures 1.4 and Table 1.5.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0_0–P0_7 | Analog inputs / I/O ports | AN0–AN7 for 10-bit ADC; configurable CMOS I/O with software-selectable pull-up |
| P1_4 / P1_5 | TXD0 / RXD0 | Primary UART0 pins for LIN physical layer implementation |
| P1_7 | TRAIO | Timer RA I/O pin used with UART0 for hardware LIN protocol timing |
| P3_4 / P3_5 | SDA / SCL | I²C bus data/clock lines supporting multi-master communication up to 400 kHz |
| XIN / XOUT | Crystal oscillator inputs | Supports 20 MHz crystal or ceramic resonator for main system clock generation |
| XCIN / XCOUT | 32.768 kHz RTC oscillator | Drives Timer RE real-time clock independently of main system clock |
| RESET | Active-low reset input | Asynchronous reset assertion clears CPU registers and initializes peripherals |
Key Features
| Feature | Design Value |
|---|---|
| Dual data flash blocks | Two independent 1 KB blocks enable wear-leveling and atomic write/erase for firmware parameter storage |
| Hardware LIN module | Integrated LIN 2.1 support via UART0 + Timer RA eliminates need for external LIN transceiver in basic nodes |
| Real-time clock (Timer RE) | Low-power RTC with 32.768 kHz crystal input and compare-match interrupt for periodic wake-up or timestamping |
| High-speed on-chip oscillator | Adjustable internal oscillator (1–20 MHz) allows clock source redundancy and eliminates external crystal in cost-sensitive designs |
| 12-channel 10-bit ADC | Simultaneous sampling not supported, but channel scan mode enables rapid sequential conversion across AN0–AN11 |
| Extended temperature grade (Y) | Rated for –20°C to +105°C operation, qualified for demanding consumer appliance environments like oven controls |
Applications
| Smart Home Appliance Control | Industrial Panel Meter Interface |
|---|---|
|
Use Scenario: Microcontroller in washing machine main board managing motor drive sequencing, water level sensing, and user interface. IC Role / Device Role / Timing Role: Central control unit executing real-time PID loops, reading 12-channel ADC for pressure/temperature sensors, and driving LED displays via P2_0–P2_7 LED ports. Use Value: Dual data flash enables field-updatable calibration tables; LIN module supports communication with door lock or detergent dispenser modules. |
Use Scenario: Embedded controller in DIN-rail mounted panel meter acquiring analog sensor signals and displaying values via serial interface. IC Role / Device Role / Timing Role: Data acquisition node converting 12 analog inputs (e.g., current transformers, thermocouples) and transmitting results via UART1 to host HMI. Use Value: 10-bit ADC with external VREF (P4_2) ensures ±0.1% measurement accuracy; stop mode (0.7 µA) extends battery life in portable variants. |
| Consumer Audio System Remote | White Goods Motor Drive Monitor |
|
Use Scenario: IR remote control processor decoding NEC protocol and sending commands via I²C to audio receiver ICs. IC Role / Device Role / Timing Role: Low-power command interpreter using INT0 (P4_5) for IR pulse detection and SDA/SCL (P3_4/P3_5) for I²C master communication. Use Value: High-speed on-chip oscillator enables fast wake-from-stop response (<10 µs); 48 KB flash accommodates multi-protocol IR learning firmware. |
Use Scenario: Inverter-driven compressor monitor in refrigerator, measuring motor phase currents and thermal feedback. IC Role / Device Role / Timing Role: Safety-critical monitoring unit reading ADC channels for overcurrent/overtemperature, triggering fault shutdown via GPIO. Use Value: Y-version temperature rating (–20°C to +105°C) ensures reliability near compressor heat sources; watchdog timer prevents firmware lockup during fault conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F21257SNFP | Same core, package, and peripherals, but N version (–20°C to +85°C) instead of Y version | Limited to ambient-temperature-stable environments like office equipment or indoor audio systems | Select when extended temperature range is unnecessary and cost optimization is prioritized |
| R5F21256SYFP | 32 KB program flash (vs. 48 KB), identical data flash, RAM, and peripheral set | Suitable for simpler control tasks with smaller firmware footprints, e.g., basic fan controllers or lighting dimmers | Choose when application firmware fits within 32 KB and memory headroom is not required for future updates |
Compared with R5F21257SYFP#U0, R5F21257SNFP trades extended temperature capability for lower cost in benign environments, while R5F21256SYFP reduces flash capacity by 16 KB without altering data retention, peripheral count, or power profile - enabling tiered product variants within the same hardware platform.
Availability
R5F21257SYFP#U0 is available at Aetrix Electronics and suitable for smart home appliance control, industrial panel meter interfaces, consumer audio remote systems, and white goods motor drive monitors requiring stable component supply across extended temperature ranges.
Supply support for R5F21257SYFP#U0 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 automotive, industrial, and IoT applications.
The R8C/25 Group, including R5F21257SYFP#U0, was designed for cost-sensitive, resource-constrained embedded control in consumer electronics and industrial equipment - emphasizing integrated peripherals, low-power operation, and extended temperature reliability.
FAQ
What is the operating temperature range of the R5F21257SYFP#U0?
The R5F21257SYFP#U0 is a Y-version device rated for –20°C to +105°C ambient operation, making it suitable for deployment near heat-generating components in ovens, refrigerators, or industrial enclosures where standard N-version MCUs would fail.
Does the R5F21257SYFP#U0 support hardware LIN communication?
Yes, the R5F21257SYFP#U0 integrates a hardware LIN module using UART0 and Timer RA, enabling full LIN 2.1 protocol handling without external transceivers - confirmed in Renesas documentation REJ03B0117-0300 section 1.2.
How many data flash blocks does the R5F21257SYFP#U0 include, and what is their endurance?
The R5F21257SYFP#U0 includes two independent 1 KB data flash blocks with 10,000 erase/write cycles each, allowing reliable nonvolatile storage of calibration data, configuration settings, or firmware update metadata.
What package type and pin count does the R5F21257SYFP#U0 use?
The R5F21257SYFP#U0 uses a 52-pin LQFP package (PLQP0052JA-A) with 10 mm × 10 mm body size and 0.65 mm pin pitch, matching the pinout defined in Figure 1.4 of Renesas document REJ03B0117-0300.
Can the R5F21257SYFP#U0 operate without an external crystal?
Yes - the R5F21257SYFP#U0 features a high-speed on-chip oscillator adjustable from 1 MHz to 20 MHz, enabling full operation without external crystals; however, XIN/XOUT pins remain available for precision timing when required.
R5F21257SYFP#U0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 52-LQFP
- Series:
- R8C/2x/25
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- R8C
- Core Size:
- 16-Bit
- Speed:
- 20MHz
- Connectivity:
- I2C, LINbus, SIO, SSU, UART/USART
- Peripherals:
- POR, Voltage Detect, WDT
- Number of I/O:
- 41
- Program Memory Size:
- 48KB (48K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 2.5K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.2V ~ 5.5V
- Data Converters:
- A/D 12x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -20°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F21257SYFP#U0 FAQ
1.How can I place an order for R5F21257SYFP#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F21257SYFP#U0 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 R5F21257SYFP#U0 reliable?
The price and inventory of R5F21257SYFP#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F21257SYFP#U0 is usually 5 days.
3.What payment methods are accepted for R5F21257SYFP#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F21257SYFP#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F21257SYFP#U0?
R5F21257SYFP#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F21257SYFP#U0 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 R5F21257SYFP#U0?
For technical support, including R5F21257SYFP#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F21257SYFP#U0 requirements.
6.How does Aetrix verify that R5F21257SYFP#U0 is sourced from the original manufacturer or authorized distributors?
All R5F21257SYFP#U0 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 R5F21257SYFP#U0 meets industry standards.
7.What is the process for return or replacement of R5F21257SYFP#U0?
All R5F21257SYFP#U0 units undergo pre-shipment inspection (PSI). If there is an issue with R5F21257SYFP#U0, 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 R5F21257SYFP#U0 part is unused and in its original packaging.
Return procedure for R5F21257SYFP#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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