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Renesas R5F21294JSP#W4
- Part No.:
- R5F21294JSP#W4
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 20-LSSOP (0.173", 4.40mm Width)
- Datasheet:
-
R5F21294JSP#W4.pdf
- Description:
- IC MCU 16BIT 16KB FLASH 20LSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,089
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Product details
Overview
R5F21294JSP#W4 from Renesas Electronics is a 16-bit R8C/29 Group single-chip microcontroller with 16 KB program flash, 2 KB data flash (1 KB × 2 blocks), 1 KB RAM, and operating temperature range of −40 to +85°C. It integrates an R8C CPU core, 10-bit 4-channel ADC, UART0/UART1, I²C bus interface, hardware LIN module, and four 8/16-bit timers - used in industrial control panels requiring embedded real-time monitoring and communication.
For engineers reviewing the R5F21294JSP#W4 datasheet, R5F21294JSP#W4 pinout, R5F21294JSP#W4 application, or R5F21294JSP#W4 equivalent, key selection considerations include its J-version industrial temperature grade, on-chip data flash for parameter storage, LSSOP-20 package constraints, and hardware LIN support for automotive body electronics integration.
Technical Context
The R5F21294JSP#W4 implements the R8C CPU core with 89 fundamental instructions and minimum instruction execution time of 50 ns at 20 MHz (VCC = 3.0–5.5 V). Its memory architecture separates 16 KB program ROM from 2 KB data flash (1 KB × 2 blocks), enabling field-updatable configuration storage independent of firmware.
Peripheral integration includes Timer RE with compare match (but no real-time clock in J version), hardware LIN transceiver co-sourced from Timer RA and UART0, and dual UART channels supporting both asynchronous and clock-synchronous serial I/O - all mapped to a fixed 20-pin LSSOP package with shared pin functions including SDA/SCL, TRCIOx, and KI0–KI3.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C 16-bit CISC core with 89 instructions and register bank switching |
| Flash Memory | 16 KB program ROM + 2 KB data flash (1 KB × 2 blocks) for nonvolatile parameter storage |
| RAM | 1 KB internal SRAM for stack, variables, and interrupt context preservation |
| ADC | 10-bit successive-approximation A/D converter with 4 input channels (AN8–AN11) |
| Timers | Timer RA/RB (8-bit × 2), Timer RC (16-bit), Timer RE (compare match only, no RTC in J version) |
| Serial Interfaces | UART0 (clock sync + UART), UART1 (UART only), I²C bus, LIN 2.1 (hardware-assisted) |
| Supply Voltage | 2.7–5.5 V - supports direct connection to 3.3 V or 5 V system rails without level shifting |
| Operating Temp | −40°C to +85°C (J version) - qualified for industrial ambient environments |
Pinout & Package
Package: 20-pin molded-plastic LSSOP (PLSP0020JB-A), 0.65 mm pitch, 7.6 mm × 4.4 mm footprint, surface-mount compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1_0 / KI0 / AN8 | Multi-function I/O | Key interrupt input, analog input channel 0, or general-purpose CMOS I/O |
| P1_1 / KI1 / AN9 / TRCIOA / TRCTRG | Multi-function I/O | Key interrupt, analog input 1, timer capture/compare, or external trigger source |
| P1_2 / KI2 / AN10 / TRCIOB | Multi-function I/O | Key interrupt, analog input 2, or timer capture/compare output |
| P1_3 / KI3 / AN11 / TRBO | Multi-function I/O | Key interrupt, analog input 3, or Timer RB output |
| P1_4 / TXD0 | UART0 transmit | Asynchronous serial output for primary debug or host communication |
| P1_5 / RXD0 / (TRAIO) / (INT1) | UART0 receive | Asynchronous serial input; optionally configured as Timer RA I/O or INT1 |
| P1_6 / CLK0 / (SSI) | Clock I/O | Master clock output for synchronous peripherals or SSI clock when enabled |
| P1_7 / TRAIO / INT1 | Timer RA I/O | Programmable PWM output or input capture, also serves as external interrupt source |
| P3_3 / INT3 / TRCCLK / SSI | External clock input | Provides external timing source for Timer RC or synchronous serial interface clock |
| P3_4 / SDA / SCS / TRCIOC | I²C data / chip select | Open-drain bidirectional I²C data line or active-low SPI chip select signal |
| P3_5 / SCL / SSCK / TRCIOD | I²C clock / sync clock | I²C clock line or synchronous serial clock input/output |
| P3_7 / TRAO / RXD1 / (TXD1) | Timer RA output | Timer RA output or secondary UART receive; TXD1 available via software remap |
| P4_2 / VREF | Analog reference | External voltage reference input for A/D converter precision scaling |
| P4_5 / INT0 / (RXD1) | Interrupt input | Edge-triggered external interrupt or secondary UART receive (remappable) |
| RESET | Active-low reset | Hardware reset input requiring external pull-up; initiates cold start sequence |
| XIN / XCIN / P4_6 | Crystal oscillator input | Accepts crystal (XIN mode) or external clock (XCIN mode); J version supports XIN only |
| XOUT / XCOUT / P4_7 | Crystal oscillator output | Drives crystal in XIN mode; unused in external clock configuration |
| VCC / AVCC | Power supply | Digital and analog supply pins - require separate decoupling per layout guidelines |
| VSS / AVSS | Ground | Digital and analog ground pins - must be connected with low-impedance path |
| MODE | Boot mode select | Must be pulled high externally to enable normal operation from internal flash |
Key Features
| Feature | Design Value |
|---|---|
| On-chip data flash | 2 KB (1 KB × 2 blocks) enables field updates of calibration data or device configuration without external EEPROM |
| Hardware LIN module | Full LIN 2.1 compliance using Timer RA and UART0 - eliminates need for external LIN transceiver in body control units |
| Multi-source interrupts | 14 internal + 4 external interrupt sources with 7 priority levels - supports deterministic real-time response in motor control loops |
| Low-power operation | 0.7 µA stop mode current (VCC = 3.0 V) extends battery life in portable industrial sensors |
| Integrated analog front-end | 10-bit 4-channel ADC with dedicated VREF pin - allows ratiometric measurement against stable reference voltage |
| Pin multiplexing | Up to 4 alternate functions per pin (e.g., P1_1 supports KI1, AN9, TRCIOA, TRCTRG) - maximizes peripheral access within 20-pin constraint |
Applications
| Industrial Sensor Node | Automotive Body Controller |
|---|---|
Use Scenario: Standalone temperature/humidity sensor node with local display and wireless uplink. IC Role / Device Role / Timing Role: Main controller executing sensor polling, linearization, display refresh, and UART-based data forwarding. Use Value: On-chip data flash stores factory calibration coefficients; 10-bit ADC provides sufficient resolution for NTC thermistor readout; low-power stop mode extends 2xAA battery life beyond 2 years. | Use Scenario: Door module managing window lift, mirror adjustment, and interior lighting. IC Role / Device Role / Timing Role: LIN slave node coordinating actuator commands and status reporting over vehicle network. Use Value: Hardware LIN module ensures protocol-compliant timing and error handling; 16 KB flash accommodates multi-variant firmware; J-grade temp range covers under-dash mounting conditions. |
| Smart Appliance Control Board | Office Equipment Power Manager |
Use Scenario: Washing machine main control board managing motor drive, water valves, and user interface. IC Role / Device Role / Timing Role: Central MCU orchestrating sequential state machine, fault detection, and serial communication with display panel. Use Value: Four independent timers enable precise PWM for BLDC motor commutation, debounce for mechanical switches, and real-time event scheduling without external timing ICs. | Use Scenario: Multi-function printer power subsystem controlling sleep/wake transitions and thermal management. IC Role / Device Role / Timing Role: System power supervisor monitoring AC input, battery backup, and thermal sensors via ADC. Use Value: Integrated voltage detection and watchdog timer provide fail-safe reset behavior; 1 KB RAM supports complex power-state tracking across deep-sleep modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F21294KSP | Same core, memory, and peripherals but rated for −40°C to +125°C operation | Required for under-hood automotive applications; not needed for industrial cabinet-mounted use | Select R5F21294KSP only if ambient exceeds +85°C; otherwise R5F21294JSP#W4 offers cost and qualification advantage |
| R5F21284JSP | R8C/28 Group part with identical J-grade temp range but no data flash (0 KB) | Suitable where configuration is static or stored externally; lacks field-updatable parameter storage | Choose R5F21284JSP if data flash is unnecessary and BOM cost reduction is critical; verify firmware compatibility with missing data flash registers |
Compared with R5F21294KSP, R5F21294JSP#W4 reduces thermal qualification cost while retaining full peripheral functionality for industrial environments; versus R5F21284JSP, it adds 2 KB data flash essential for adaptive calibration and runtime configuration - making it optimal for field-deployed equipment requiring maintenance-free parameter updates.
Availability
R5F21294JSP#W4 is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body controllers, smart appliance control boards, and office equipment power managers requiring stable component supply across extended product lifecycles.
Supply support for R5F21294JSP#W4 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 industrial, automotive, and infrastructure markets.
The R8C/29 Group, including R5F21294JSP#W4, was designed for cost-sensitive embedded applications demanding integrated analog peripherals, LIN communication, and robust flash memory - targeting industrial automation and automotive body electronics.
FAQ
What is the maximum operating frequency of the R5F21294JSP#W4?
The R5F21294JSP#W4 supports a maximum operating frequency of 20 MHz when supplied at VCC = 3.0–5.5 V, delivering a minimum instruction execution time of 50 ns. This frequency is achieved using the external crystal oscillator connected to XIN/XOUT pins; the on-chip high-speed oscillator can be trimmed but does not exceed 20 MHz in the J-version specification.
Does the R5F21294JSP#W4 include a real-time clock (RTC)?
No, the R5F21294JSP#W4 does not include a functional real-time clock. While Timer RE is present, the J-version supports only compare match functionality - the RTC feature (calendar counter, alarm, periodic interrupt) is explicitly excluded per Renesas documentation and reserved for N/D versions with XCIN/XCOUT support.
How much data flash memory does the R5F21294JSP#W4 have, and what is its endurance?
The R5F21294JSP#W4 contains 2 KB of data flash memory organized as two 1 KB blocks, rated for 10,000 program/erase cycles. This is distinct from the 16 KB program flash (1,000-cycle endurance) and enables reliable storage of calibration data, device IDs, or field-updated parameters without external nonvolatile memory.
Can the R5F21294JSP#W4 operate from a 3.3 V supply?
Yes, the R5F21294JSP#W4 operates across VCC = 2.7–5.5 V, fully supporting 3.3 V nominal supply. At 3.3 V and 10 MHz operation, typical current consumption is 6 mA active and 0.7 µA in stop mode - making it suitable for mixed-voltage systems interfacing with 3.3 V logic and sensors.
What LIN protocol version is supported by the R5F21294JSP#W4 hardware module?
The R5F21294JSP#W4 implements a hardware LIN module compliant with LIN 2.1 specification, using Timer RA and UART0 resources. It handles frame synchronization, checksum calculation (classic and enhanced), and automatic header/response timing - reducing CPU overhead compared to bit-banged implementations.
R5F21294JSP#W4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 20-LSSOP (0.173", 4.40mm Width)
- Series:
- R8C/2x/29
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- R8C
- Core Size:
- 16-Bit
- Speed:
- 20MHz
- Connectivity:
- I2C, LINbus, SIO, SSU, UART/USART
- Peripherals:
- LED, POR, Voltage Detect, WDT
- Number of I/O:
- 13
- Program Memory Size:
- 16KB (16K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 2K x 8
- RAM Size:
- 1K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- A/D 4x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F21294JSP#W4 FAQ
1.How can I place an order for R5F21294JSP#W4 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F21294JSP#W4 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 R5F21294JSP#W4 reliable?
The price and inventory of R5F21294JSP#W4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F21294JSP#W4 is usually 5 days.
3.What payment methods are accepted for R5F21294JSP#W4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F21294JSP#W4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F21294JSP#W4?
R5F21294JSP#W4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F21294JSP#W4 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 R5F21294JSP#W4?
For technical support, including R5F21294JSP#W4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F21294JSP#W4 requirements.
6.How does Aetrix verify that R5F21294JSP#W4 is sourced from the original manufacturer or authorized distributors?
All R5F21294JSP#W4 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 R5F21294JSP#W4 meets industry standards.
7.What is the process for return or replacement of R5F21294JSP#W4?
All R5F21294JSP#W4 units undergo pre-shipment inspection (PSI). If there is an issue with R5F21294JSP#W4, 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 R5F21294JSP#W4 part is unused and in its original packaging.
Return procedure for R5F21294JSP#W4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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