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Renesas R5F21284JSP#U0
- Part No.:
- R5F21284JSP#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 20-LSSOP (0.173", 4.40mm Width)
- Datasheet:
-
R5F21284JSP#U0.pdf
- Description:
- IC MCU 16BIT 16KB FLASH 20LSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,495
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Product details
Overview
R5F21284JSP#U0 from Renesas Electronics is a 16-bit single-chip microcontroller in the R8C/28 Group, featuring an R8C CPU core, 16 KB flash program memory, 1 KB RAM, and operation at up to 20 MHz (50 ns min instruction time). It integrates UART0/UART1, I²C bus interface, LIN module, 10-bit 4-channel ADC, three 8-/16-bit timers, and operates across –40°C to +85°C for industrial control and appliance applications.
For engineers reviewing the R5F21284JSP#U0 datasheet, R5F21284JSP#U0 pinout, R5F21284JSP#U0 application, or R5F21284JSP#U0 equivalent, key selection criteria include its LSSOP-20 package, J-version temperature grade, absence of on-chip data flash (distinguishing it from R8C/29 Group), and support for hardware LIN via Timer RA and UART0.
Technical Context
The R5F21284JSP#U0 implements the R8C CPU core with 89 fundamental instructions and a 20-bit address space supporting 1 Mbyte addressing. Its clock system includes XIN/XOUT crystal oscillator input, high-speed/low-speed on-chip oscillators (with frequency adjustment), and supports wait/stop low-power modes down to 0.7 µA.
Peripheral integration centers on dual UARTs (one supporting LIN physical layer), I²C bus interface, 10-bit A/D converter with four analog inputs (AN8–AN11), and timer subsystem comprising Timer RA/RB (8-bit), Timer RC (16-bit with input capture/output compare), and Timer RE (real-time clock with compare match function only in J/K versions).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C 16-bit CISC core with 89 instructions and 20-bit PC; enables compact code and deterministic real-time execution. |
| Flash Memory | 16 KB program ROM; sufficient for mid-complexity firmware with bootloader and application logic in single-chip solution. |
| RAM | 1 KB internal RAM; supports stack, variables, and small buffers without external memory expansion. |
| Max Clock Speed | 20 MHz (50 ns min instruction time at VCC = 3.0–5.5 V); delivers ~10 MIPS throughput for responsive control loops. |
| Operating Temp | –40°C to +85°C (J version); qualified for industrial environments including motor drives and HVAC controls. |
| A/D Converter | 10-bit resolution, 4-channel SAR ADC; enables precise sensor monitoring (e.g., temperature, voltage, current) with internal reference. |
| Supply Voltage | 2.7 V to 5.5 V; compatible with 3.3 V and 5 V system rails without level-shifting. |
Pinout & Package
Package: 20-pin molded-plastic LSSOP (PLSP0020JB-A), 0.65 mm pitch, surface-mount, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1_0 / KI0 / AN8 | Multi-function I/O | Configurable as key interrupt input, analog input channel 0, or general-purpose I/O; supports touch/button sensing. |
| P1_4 / TXD0 | UART0 Transmit | Drives serial data output for primary asynchronous communication; TTL-level compatible. |
| P1_5 / RXD0 | UART0 Receive | Accepts serial data input for primary UART; supports full-duplex communication with TXD0. |
| P3_4 / SDA / SCS / TRCIOC | I²C Data / Chip Select / Timer RC I/O | Shared pin for I²C bidirectional data, synchronous serial chip select, or PWM/capture signal - requires software configuration. |
| RESET | Active-low Reset Input | Hardware reset initiation; must be held low ≥100 ns to trigger cold reset; internal pull-up ensures safe startup. |
| XIN / XCIN / P4_6 | Crystal Oscillator Input | Accepts external crystal (XIN mode) or 32 kHz watch crystal (XCIN mode, N/D only); J version uses XIN only. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware LIN Module | Integrated LIN 2.0/2.1 physical layer using Timer RA and UART0; eliminates external transceiver for cost-sensitive automotive body electronics. |
| Low-Power Operation | 0.7 µA stop mode current at 3.0 V; enables battery-powered applications with multi-year standby life. |
| On-Chip Oscillators | High-speed and low-speed on-chip oscillators with frequency adjustment; reduces BOM count and PCB footprint vs. external crystals. |
| Interrupt Architecture | 14 internal + 4 external interrupt sources with 7 priority levels; supports deterministic real-time response for time-critical tasks. |
| LED Drive Capability | P1_0–P1_7 support direct LED sinking (N/D versions); J version retains I/O functionality but no dedicated LED drive circuitry per datasheet. |
Applications
| Home Appliance Control | Industrial Sensor Node |
|---|---|
Use Scenario: Microcontroller in washing machine main control board managing motor drive, water valve timing, and user interface. IC Role / Device Role / Timing Role: Central command processor executing state-machine logic, reading front-panel buttons via KI0–KI3, and generating PWM for motor speed control via TRCIOA/TRCIOB. Use Value: Integrated UART0 and LIN enable communication with display module and door lock actuator; 10-bit ADC monitors thermistor and pressure sensor signals directly. | Use Scenario: Standalone environmental monitor in factory setting measuring temperature, humidity, and vibration. IC Role / Device Role / Timing Role: Data acquisition controller sampling analog sensors via AN8–AN11, timestamping readings with Timer RE, and transmitting over UART1 to gateway. Use Value: –40°C to +85°C rating ensures reliability in unconditioned industrial spaces; low-power stop mode extends battery life during idle periods. |
| Automotive Body Control | Office Equipment Logic |
Use Scenario: Seat position memory module in mid-tier vehicles communicating over LIN bus with driver seat ECU. IC Role / Device Role / Timing Role: LIN slave node handling position sensor input (AN10/AN11), storing presets in flash, and responding to master commands via UART0/LIN hardware. Use Value: Hardware LIN reduces CPU overhead and improves protocol compliance vs. bit-banged implementation; J-version temp range matches under-dash environment specs. | Use Scenario: Paper jam detection and feed motor control in multifunction printer. IC Role / Device Role / Timing Role: Real-time executor of paper path timing logic using Timer RC input capture for encoder feedback and TRBO for stepper motor phase control. Use Value: 16 KB flash accommodates firmware with diagnostics and calibration routines; I²C interface connects to EEPROM for configuration storage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F21284SDSP | D version: identical peripherals and memory, but rated –40°C to +85°C with same LSSOP-20 package and pinout. | No functional difference; D version has broader qualification documentation for industrial use cases. | Select R5F21284SDSP if formal industrial qualification evidence (e.g., AEC-Q100 not required, but extended test reports) is mandated by procurement policy. |
| R5F21294JSP | R8C/29 Group part with identical 16 KB program ROM, 1 KB RAM, and J-temp grade, but adds 2 KB on-chip data flash (1 KB × 2 blocks). | Enables field firmware updates and parameter storage without external EEPROM; increases program memory endurance to 10,000 write cycles for data regions. | Choose R5F21294JSP when non-volatile data logging or over-the-air update capability is required; otherwise R5F21284JSP#U0 offers lower cost and simpler memory management. |
Compared with R5F21284SDSP, R5F21284JSP#U0 shares identical electrical and functional specs but reflects Renesas' J-version marking convention for the same industrial temperature grade; versus R5F21294JSP, it omits data flash-reducing cost and complexity where persistent data storage is handled externally or not needed.
Availability
R5F21284JSP#U0 is available at Aetrix Electronics and suitable for industrial automation, home appliance control, and automotive body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for R5F21284JSP#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, power, and SoC solutions for industrial, automotive, and infrastructure markets.
The R8C/28 Group, including R5F21284JSP#U0, was designed for cost-sensitive, resource-constrained embedded control applications demanding high reliability, integrated peripherals, and low-power operation in industrial and consumer equipment.
FAQ
What is the maximum operating frequency of the R5F21284JSP#U0?
The R5F21284JSP#U0 supports a maximum operating frequency of 20 MHz when powered at VCC = 3.0 V to 5.5 V, achieving a minimum instruction execution time of 50 ns. This frequency is enabled by the external crystal oscillator connected to XIN/XOUT pins or the high-speed on-chip oscillator. The device maintains full functionality-including all peripherals and ADC-within this specification.
Does the R5F21284JSP#U0 include on-chip data flash memory?
No, the R5F21284JSP#U0 belongs to the R8C/28 Group and contains only 16 KB of program flash memory with no dedicated data flash. Unlike the R8C/29 Group (e.g., R5F21294JSP), it lacks the 1 KB × 2 on-chip data flash blocks. Data retention must be implemented externally or via emulated EEPROM in program flash with wear-leveling.
Which communication interfaces are supported by the R5F21284JSP#U0?
The R5F21284JSP#U0 supports UART0, UART1, I²C bus interface, clock synchronous serial I/O with chip select (SSI), and hardware LIN (via Timer RA and UART0). It does not support SPI or CAN. UART0 is configurable for LIN physical layer compliance, while I²C enables connection to sensors and EEPROMs at standard-mode (100 kHz) speeds.
What is the operating temperature range specified for the R5F21284JSP#U0?
The R5F21284JSP#U0 is rated for an operating ambient temperature range of –40°C to +85°C, corresponding to the "J version" designation in its part number. This qualifies it for industrial-grade applications such as motor control, HVAC systems, and factory automation equipment where extended thermal performance is required.
Is the R5F21284JSP#U0 pin-compatible with other R8C/28 Group MCUs in the same package?
Yes, the R5F21284JSP#U0 is pin-compatible with all other R8C/28 Group devices in the PLSP0020JB-A (LSSOP-20) package, including R5F21282JSP, R5F21286JSP, and R5F21284SDSP. Pin functions, electrical characteristics, and peripheral mappings are identical; only memory size (8/16/32 KB flash) and temperature grade (J vs. D) differ between variants.
R5F21284JSP#U0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 20-LSSOP (0.173", 4.40mm Width)
- Series:
- R8C/2x/28
- 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:
- LED, POR, Voltage Detect, WDT
- Number of I/O:
- 13
- Program Memory Size:
- 16KB (16K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- 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:
R5F21284JSP#U0 FAQ
1.How can I place an order for R5F21284JSP#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F21284JSP#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 R5F21284JSP#U0 reliable?
The price and inventory of R5F21284JSP#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F21284JSP#U0 is usually 5 days.
3.What payment methods are accepted for R5F21284JSP#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F21284JSP#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F21284JSP#U0?
R5F21284JSP#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F21284JSP#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 R5F21284JSP#U0?
For technical support, including R5F21284JSP#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F21284JSP#U0 requirements.
6.How does Aetrix verify that R5F21284JSP#U0 is sourced from the original manufacturer or authorized distributors?
All R5F21284JSP#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 R5F21284JSP#U0 meets industry standards.
7.What is the process for return or replacement of R5F21284JSP#U0?
All R5F21284JSP#U0 units undergo pre-shipment inspection (PSI). If there is an issue with R5F21284JSP#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 R5F21284JSP#U0 part is unused and in its original packaging.
Return procedure for R5F21284JSP#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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