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Renesas R5F21284SNSP#U0
- Part No.:
- R5F21284SNSP#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 20-LSSOP (0.173", 4.40mm Width)
- Datasheet:
-
R5F21284SNSP#U0.pdf
- Description:
- IC MCU 16BIT 16KB FLASH 20LSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,799
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Product details
Overview
R5F21284SNSP 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 20-pin LSSOP (PLSP0020JB-A) packaging. It delivers 50 ns minimum instruction execution at 20 MHz, integrates a 10-bit 4-channel ADC, dual UARTs, I²C, LIN, and four 8-/16-bit timers - deployed in consumer appliance control and industrial sensor interface applications.
For engineers reviewing the R5F21284SNSP datasheet, R5F21284SNSP pinout, R5F21284SNSP application, or R5F21284SNSP equivalent, key selection criteria include its -20°C to +85°C operating range (N version), on-chip voltage detection and power-on reset, low-power stop mode (0.7 µA), and hardware LIN support via Timer RA and UART0 - all within a 20-pin surface-mount package.
Technical Context
The R5F21284SNSP implements the R8C CPU core with 89 fundamental instructions and a 20-bit address space supporting up to 1 Mbyte. Its memory subsystem includes 16 KB of on-chip flash program ROM and 1 KB of SRAM, mapped to fixed regions (0C000h–0FFFFh and 00400h–007FFh respectively), with a dedicated 32-byte interrupt vector table at 0FFDCh–0FFFFh.
Peripheral integration includes two independent UART channels (UART0 with clock-synchronous serial I/O capability and UART1), one I²C bus interface, one hardware LIN module (using Timer RA and UART0), four timer units (RA/RB: 8-bit; RC: 16-bit input-capture/output-compare; RE: real-time clock), and a 10-bit A/D converter with four analog inputs (AN8–AN11).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C 16-bit CISC core with 89 instructions and 20-bit addressing |
| Flash Memory | 16 KB program ROM; 1,000 write/erase cycles; VCC = 2.7–5.5 V programming |
| RAM | 1 KB on-chip SRAM for data storage, stack, and subroutine calls |
| Operating Voltage | 2.2–5.5 V (at 5 MHz); 3.0–5.5 V (at 20 MHz); supports low-voltage operation |
| Temperature Range | -20°C to +85°C (N version); qualified for standard-grade applications per Renesas classification |
| Power Consumption | Typ. 10 mA @ 5.0 V/20 MHz; 0.7 µA in stop mode; enables battery-backed designs |
| A/D Converter | 10-bit resolution, 4-channel single-ended input (AN8–AN11); internal reference via VREF pin |
Pinout & Package
Package: 20-pin molded-plastic LSSOP (PLSP0020JB-A), 0.65 mm pitch, surface-mount compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (P3_5) | SCL / TRCIOD / SSCK | I²C clock line, Timer RC channel D I/O, or synchronous serial clock - selectable by register configuration |
| 2 (P3_7) | TRAO / RXD1 / SSO | Timer RA output, UART1 receive, or synchronous serial output - multiplexed function requiring software setup |
| 3 (RESET) | Active-low reset input | Hardware reset assertion; internal pull-up; requires external debouncing for noisy environments |
| 4 (XOUT/XCOUT) | Oscillator output / crystal buffer | Drives external crystal/resonator for XIN clock; XCOUT active only on N/D versions for 32 kHz RTC oscillator |
| 6 (XIN/XCIN) | Primary clock input / 32 kHz RTC input | Accepts 5–20 MHz crystal/resonator (XIN) or 32.768 kHz crystal (XCIN on N/D versions only) |
| 9 (P4_5) | INT0 / RXD1 | External interrupt 0 trigger or UART1 receive input - dual-role pin configured at runtime |
| 12 (P1_5) | RXD0 / TRAIO / INT1 | UART0 receive, Timer RA bidirectional I/O, or interrupt 1 input - function selected via peripheral enable registers |
| 14–18 (P1_3–P1_0) | AN11–AN8 / KI3–KI0 / TRBO / TRCIOA–B | Four analog inputs for ADC, key interrupt inputs, Timer RB output, and Timer RC capture/compare I/O |
| 16 (VREF) | Analog reference voltage input | Accepts external reference (up to VCC) for A/D conversion precision; bypass capacitor recommended |
| 20 (P3_4) | SDA / TRCIOC / SCS | I²C data line, Timer RC channel C I/O, or chip-select for synchronous serial interface - software-mapped |
Key Features
| Feature | Design Value |
|---|---|
| Integrated LIN Physical Layer Support | Hardware LIN module uses Timer RA and UART0 to implement ISO 9141-2/KWP2000 protocol without firmware overhead |
| Low-Power Operating Modes | Stop mode (0.7 µA) and wait mode (2.0 µA @ 32 kHz) enable energy-sensitive portable and sensor-node designs |
| Dual UART with Clock-Synchronous Option | UART0 supports both asynchronous UART and clock-synchronous serial I/O - simplifies legacy RS-485 or SPI-like peripheral interfacing |
| On-Chip Oscillation Stop Detection | Monitors XIN clock stability and triggers reset if oscillation fails - eliminates need for external watchdog timing circuitry |
| Configurable I/O Ports with Pull-Up | All 13 general-purpose I/O pins (P1_0–P1_7, P3_3–P3_5, P3_7, P4_5) support programmable direction and internal pull-up resistors |
Applications
| Home Appliance Control | Industrial Sensor Interface |
|---|---|
|
Use Scenario: Temperature and motor control in microwave ovens and washing machines. IC Role / Device Role / Timing Role: Primary system controller executing real-time PWM for motor drivers and reading thermistor-based analog inputs via AN8–AN11. Use Value: Integrated 10-bit ADC and dual timers eliminate external signal-conditioning ICs; LIN support enables communication with display modules. |
Use Scenario: Data acquisition and local logic in factory-floor environmental sensors. IC Role / Device Role / Timing Role: Standalone sensor node managing analog sensor readings, UART logging, and low-power wake-on-interrupt operation. Use Value: 0.7 µA stop mode extends battery life; on-chip voltage detection ensures reliable operation during brown-out conditions. |
| Office Equipment Motor Drive | Automotive Body Control Subsystem |
|
Use Scenario: Paper feed and jam detection in laser printers and multifunction peripherals. IC Role / Device Role / Timing Role: Real-time monitoring of optical interrupters and stepper motor phase control using Timer RC input-capture and output-compare. Use Value: 16-bit Timer RC provides precise timing for motion control; 20-pin LSSOP fits compact PCB layouts in space-constrained mechanisms. |
Use Scenario: Door lock actuation and interior lighting control in entry-level automotive platforms. IC Role / Device Role / Timing Role: LIN slave node receiving commands from body control module and driving solenoids/LEDs via P1_0–P1_7 LED drive ports. Use Value: Hardware LIN compliance reduces firmware complexity; -20°C to +85°C rating meets passenger compartment thermal requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F21284SDSP | 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 under-hood use cases | Select R5F21284SDSP when ambient operating temperature exceeds 85°C or drops below -20°C |
| R5F21294SNSP | Adds 2 × 1 KB data flash blocks (10,000-cycle endurance); otherwise identical pinout, code compatibility, and peripheral set | Enables field-upgradable calibration data or parameter storage without external EEPROM | Choose R5F21294SNSP when nonvolatile parameter retention between power cycles is required |
Compared with R5F21284SNSP, R5F21284SDSP extends temperature tolerance for harsher environments, while R5F21294SNSP adds data flash for configuration storage - neither alters pin compatibility or instruction set, enabling drop-in replacement where thermal or nonvolatile data requirements differ.
Availability
R5F21284SNSP is available at Aetrix Electronics and suitable for home appliance control, industrial sensor interface, and office equipment motor drive applications requiring stable component supply across multi-year production cycles.
Supply support for R5F21284SNSP 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, formed in 2010 through the merger of NEC Electronics and Renesas Technology.
The R8C/28 Group, including R5F21284SNSP, was designed for cost-sensitive, low-power embedded control in consumer and industrial equipment - emphasizing integration, reliability, and ease of migration within the R8C family.
FAQ
What is the maximum operating frequency and corresponding supply voltage for R5F21284SNSP?
The R5F21284SNSP achieves a minimum instruction execution time of 50 ns at 20 MHz, requiring a supply voltage of 3.0 V to 5.5 V. This specification applies to all versions except the K version (16 MHz max), and confirms full-speed operation is supported within its N-version voltage range. The R5F21284SNSP maintains timing integrity across its specified VCC window without derating.
Does R5F21284SNSP include on-chip debug support for firmware development?
Yes, the R5F21284SNSP supports on-chip debugging via the single-wire background debugger interface (BDC), compatible with Renesas E8/E8a emulators. This allows full breakpoint, watchpoint, and memory inspection capabilities without requiring additional debug hardware pins - essential for rapid iteration during R5F21284SNSP firmware development.
Can R5F21284SNSP operate in low-power modes, and what are the current draw specifications?
Yes, the R5F21284SNSP supports multiple low-power states: wait mode draws 2.0 µA (with 32 kHz XCIN clock active), and stop mode draws just 0.7 µA (VCC = 3.0 V). These modes retain RAM content and allow wake-up via external interrupt or reset, making the R5F21284SNSP suitable for battery-powered sensing nodes where energy efficiency is critical.
Is the R5F21284SNSP pin-compatible with other devices in the R8C/28 Group?
Yes, all R8C/28 Group MCUs - including R5F21282SNSP, R5F21284SNSP, and R5F21286JSP - share identical 20-pin LSSOP (PLSP0020JB-A) packaging and pin assignments. Firmware and hardware designs targeting the R5F21284SNSP can be reused across the group with only memory size and temperature grade adjustments required.
What peripheral interfaces does R5F21284SNSP provide for sensor connectivity?
The R5F21284SNSP provides four analog inputs (AN8–AN11) for direct connection to thermistors, potentiometers, or bridge sensors; I²C (SCL/SDA) for digital sensors like temperature/humidity ICs; and UART0/UART1 for serial sensor modules. Its integrated 10-bit ADC and configurable pull-ups simplify analog front-end design without external components.
R5F21284SNSP#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):
- 2.2V ~ 5.5V
- Data Converters:
- A/D 4x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F21284SNSP#U0 FAQ
1.How can I place an order for R5F21284SNSP#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F21284SNSP#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 R5F21284SNSP#U0 reliable?
The price and inventory of R5F21284SNSP#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F21284SNSP#U0 is usually 5 days.
3.What payment methods are accepted for R5F21284SNSP#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F21284SNSP#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F21284SNSP#U0?
R5F21284SNSP#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F21284SNSP#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 R5F21284SNSP#U0?
For technical support, including R5F21284SNSP#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F21284SNSP#U0 requirements.
6.How does Aetrix verify that R5F21284SNSP#U0 is sourced from the original manufacturer or authorized distributors?
All R5F21284SNSP#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 R5F21284SNSP#U0 meets industry standards.
7.What is the process for return or replacement of R5F21284SNSP#U0?
All R5F21284SNSP#U0 units undergo pre-shipment inspection (PSI). If there is an issue with R5F21284SNSP#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 R5F21284SNSP#U0 part is unused and in its original packaging.
Return procedure for R5F21284SNSP#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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