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Renesas R5F21257SYFP#V2
- Part No.:
- R5F21257SYFP#V2
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 52-LQFP
- Datasheet:
-
R5F21257SYFP#V2.pdf
- Description:
- IC MCU 16BIT 48KB FLASH 52LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,784
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Product details
Overview
R5F21257SYFP#V2 from Renesas Electronics is a 16-bit single-chip microcontroller in the R8C/25 Group, featuring an R8C/Tiny Series CPU core, 48 KB flash program memory, 2.5 KB RAM, and dual 1 KB data flash blocks. It operates at up to 20 MHz (50 ns min. instruction time), supports 12-channel 10-bit A/D conversion, hardware LIN via UART0/timer RA, and real-time clock functionality in timer RE. It targets embedded control in consumer appliances requiring compact, low-power MCU solutions.
For engineers reviewing the R5F21257SYFP#V2 datasheet, R5F21257SYFP#V2 pinout, R5F21257SYFP#V2 application, or R5F21257SYFP#V2 equivalent, key selection criteria include its Y-version extended temperature range (−20°C to +105°C), on-chip data flash endurance (10,000 erase/write cycles), LIN bus support, and 52-pin LQFP (PLQP0052JA-A) package with 41 general-purpose I/O pins.
Technical Context
The R5F21257SYFP#V2 implements the R8C/Tiny CPU core with 89 fundamental instructions and a 1 Mbyte address space. Its peripheral set includes two UART channels, one I²C interface, one clock-synchronous serial I/O with chip select, eight 8-bit I/O ports (P0–P6), and four independent timers (RA, RB, RD×2, RE) supporting input capture, output compare, and RTC functions.
It integrates three clock generation circuits: XIN-based (20 MHz max), high-speed on-chip oscillator with frequency adjustment, and XCIN-based 32 kHz real-time clock circuit. Power management includes wait mode (2.0 µA @ 3.0 V, f(XCIN)=32 kHz) and stop mode (0.7 µA @ 3.0 V), with built-in power-on reset and voltage detection circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C/Tiny 16-bit architecture with 89 instructions and 1 Mbyte address space |
| Flash Memory | 48 KB program ROM + 2 × 1 KB data flash blocks (10,000 erase/write cycles) |
| RAM | 2.5 KB on-chip SRAM for variable storage and stack operations |
| A/D Converter | 10-bit resolution, 12 input channels (AN0–AN11), referenced to external VREF or AVCC |
| Operating Temperature | −20°C to +105°C (Y version), enabling use in thermally demanding consumer and industrial environments |
| Supply Voltage | 2.2 V to 5.5 V - supports wide-input battery or regulated supply designs without level-shifting |
| Package | 52-pin LQFP (PLQP0052JA-A), 10 mm × 10 mm, 0.65 mm pitch - compatible with standard SMT assembly |
Pinout & Package
Package: 52-pin molded-plastic LQFP (PLQP0052JA-A), 10 mm × 10 mm body, 0.65 mm pin pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC / AVCC | Power supply input | Main digital supply (2.2–5.5 V); AVCC powers A/D converter - requires local decoupling |
| VSS / AVSS | Ground reference | Digital and analog ground return - separate AVSS improves A/D noise immunity |
| XIN / XOUT | External crystal/resonator interface | Supports up to 20 MHz crystal; XOUT is output-only; enables precise timing for UART/LIN |
| XCIN / XCOUT | 32 kHz real-time clock oscillator | Drives timer RE's RTC function; allows low-power timekeeping during stop mode |
| RESET | Active-low reset input | Hardware reset assertion resets CPU, peripherals, and registers - must be debounced externally |
| MODE | Boot mode selection | Pulled high via resistor to enable normal flash execution; critical for reliable startup |
| P0_0–P0_7 | Analog/digital I/O port | 8-bit port with AN0–AN7 inputs - configurable as GPIO or A/D channel with programmable pull-ups |
| RXD0 / TXD0 | UART0 serial interface | Full-duplex asynchronous communication; used with timer RA for hardware LIN physical layer |
| SCL / SDA | I²C bus interface | Open-drain bidirectional lines supporting standard/fast-mode I²C (100/400 kbps) |
| INT0–INT3 | External interrupt inputs | Edge-triggered interrupts tied to timer RD (INT0), timer RA (INT1), and UART1 (INT2/INT3) |
Key Features
| Feature | Design Value |
|---|---|
| Hardware LIN module | Integrated LIN 2.0/2.1 support via UART0 + timer RA - eliminates external transceiver for automotive body electronics |
| Dual data flash blocks | Two independent 1 KB data flash areas enable safe firmware parameter storage with wear leveling and background erase |
| Real-time clock (timer RE) | Low-power RTC with compare match and alarm output - maintains timekeeping in stop mode using 32 kHz XCIN |
| 12-channel 10-bit A/D converter | Simultaneous sampling not supported, but configurable trigger sources (timer, software, external) allow flexible sensor acquisition |
| Y-version temperature grade | Rated for −20°C to +105°C operation - suitable for enclosed consumer devices with limited thermal dissipation |
Applications
| Home Appliance Control | Office Equipment Motor Control |
|---|---|
|
Use Scenario: Microcontroller in washing machine main board managing water valve, motor drive, and user interface. IC Role / Device Role / Timing Role: Central system controller executing real-time motor commutation, A/D-based current sensing, and LIN-connected display panel. Use Value: Integrated LIN and 12-channel A/D reduce BOM count; Y-grade temp rating ensures reliability inside insulated cabinet. |
Use Scenario: Embedded controller in multifunction printer regulating paper feed stepper motors and toner sensor feedback. IC Role / Device Role / Timing Role: Timing-critical motion sequencer using timer RD input capture for encoder feedback and PWM outputs for motor drivers. Use Value: 20 MHz CPU speed and 50 ns instruction time enable sub-millisecond loop control; 2.5 KB RAM buffers sensor logs. |
| Audio System Remote Interface | Smart Thermostat Sensor Hub |
|
Use Scenario: IR remote receiver and display driver in home theater receiver with volume, source, and EQ controls. IC Role / Device Role / Timing Role: Key input interrupt handler (KI0–KI3) decoding button presses and driving LED segments via P2_0–P2_7 LED drive ports. Use Value: Dedicated LED drive capability simplifies front-panel design; low-power stop mode extends battery life in remote units. |
Use Scenario: Wireless thermostat node collecting ambient temperature, humidity, and occupancy via analog and digital sensors. IC Role / Device Role / Timing Role: Sensor fusion hub performing A/D conversion on thermistor/hygrometer, I²C comms with environmental ICs, and RTC-stamped data logging. Use Value: Dual data flash blocks store calibration coefficients and event logs independently; 32 kHz RTC enables accurate time-stamping without external crystal. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F21257SDFP | D-version: −40°C to +85°C operating range; identical memory, peripherals, and pinout | Targeted at industrial automation where extended cold-start capability is required | Select R5F21257SDFP when ambient temperature may dip below −20°C; no PCB changes needed |
| R5F21256SYFP#V2 | 32 KB program ROM (vs. 48 KB); same data flash, RAM, peripherals, and Y-temperature grade | Suitable for cost-sensitive designs with smaller firmware footprints and no future code expansion needs | Choose R5F21256SYFP#V2 to reduce flash cost while retaining full feature compatibility and thermal performance |
Compared with R5F21257SYFP#V2, R5F21257SDFP trades extended high-temperature operation for wider low-temperature tolerance, while R5F21256SYFP#V2 reduces program memory by 16 KB without affecting data flash, I/O count, or real-time capabilities - enabling scalable firmware development across product tiers.
Availability
R5F21257SYFP#V2 is available at Aetrix Electronics and suitable for home appliance control, office equipment motor control, audio system remote interfaces, and smart thermostat sensor hubs requiring stable component supply over multi-year production cycles.
Supply support for R5F21257SYFP#V2 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, power, and SoC solutions for automotive, industrial, and consumer markets.
The R8C/25 Group, including R5F21257SYFP#V2, was designed for cost-effective, low-power embedded control in consumer electronics - emphasizing integrated peripherals (LIN, I²C, RTC, A/D), wide supply range, and extended temperature operation.
FAQ
What is the maximum operating frequency of the R5F21257SYFP#V2?
The R5F21257SYFP#V2 supports a maximum operating frequency of 20 MHz when powered at VCC = 3.0–5.5 V, achieving a minimum instruction execution time of 50 ns. This frequency is enabled by the external crystal/resonator connected to XIN/XOUT or the internal high-speed oscillator with frequency adjustment capability.
Does the R5F21257SYFP#V2 include on-chip debug support?
Yes, the R5F21257SYFP#V2 supports on-chip debugging via the single-wire debug interface using the RESET pin. This allows full breakpoint, step-through, and register inspection capability without requiring additional debug pins - essential for rapid firmware validation in resource-constrained designs.
How many A/D input channels does the R5F21257SYFP#V2 support, and what is their resolution?
The R5F21257SYFP#V2 integrates a single 10-bit successive-approximation A/D converter with 12 analog input channels (AN0–AN11). Input voltage range is selectable between AVCC and external VREF, and conversions can be triggered by software, timer events, or external signals - enabling flexible sensor interfacing.
What is the purpose of the dual 1 KB data flash blocks in the R5F21257SYFP#V2?
The R5F21257SYFP#V2 includes two independent 1 KB data flash blocks to support robust non-volatile parameter storage. This architecture allows one block to be erased and rewritten while the other retains valid data - enabling atomic updates of calibration values, device settings, or usage logs without risk of corruption during power loss.
Is the R5F21257SYFP#V2 pin-compatible with other members of the R8C/25 Group?
Yes, all R8C/25 Group MCUs in the 52-pin LQFP package (PLQP0052JA-A), including R5F21257SYFP#V2, share identical pin assignments and electrical characteristics. Firmware and hardware designs can scale across memory variants (e.g., R5F21254–R5F21258) without layout changes - simplifying platform development and inventory management.
R5F21257SYFP#V2 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#V2 FAQ
1.How can I place an order for R5F21257SYFP#V2 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F21257SYFP#V2 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#V2 reliable?
The price and inventory of R5F21257SYFP#V2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F21257SYFP#V2 is usually 5 days.
3.What payment methods are accepted for R5F21257SYFP#V2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F21257SYFP#V2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F21257SYFP#V2?
R5F21257SYFP#V2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F21257SYFP#V2 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#V2?
For technical support, including R5F21257SYFP#V2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F21257SYFP#V2 requirements.
6.How does Aetrix verify that R5F21257SYFP#V2 is sourced from the original manufacturer or authorized distributors?
All R5F21257SYFP#V2 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#V2 meets industry standards.
7.What is the process for return or replacement of R5F21257SYFP#V2?
All R5F21257SYFP#V2 units undergo pre-shipment inspection (PSI). If there is an issue with R5F21257SYFP#V2, 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#V2 part is unused and in its original packaging.
Return procedure for R5F21257SYFP#V2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R5F21257SYFP#V2 Tags
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