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Renesas R5F21143SP#U0
- Part No.:
- R5F21143SP#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 20-LSSOP (0.173", 4.40mm Width)
- Datasheet:
-
R5F21143SP#U0.pdf
- Description:
- IC MCU 16BIT 12KB FLASH 20LSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,555
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Product details
Overview
R5F21143SP#U0 from Renesas Electronics is a 16-bit R8C/Tiny Series microcontroller with 12 KB flash program memory, 768 bytes RAM, and integrated 10-bit 4-channel ADC, deployed in embedded control for household appliances and industrial sensors. It features an 8-bit Timer X, 8-bit Timer Z, 16-bit Timer C with input capture/output compare, UART/SSU serial interface, and operates at up to 20 MHz (50 ns min instruction time) across 3.0–5.5 V supply.
For engineers reviewing the R5F21143SP#U0 datasheet, R5F21143SP#U0 pinout, R5F21143SP#U0 application, or R5F21143SP#U0 equivalent, key selection criteria include its LSSOP-20 package, data retention without external EEPROM, low-power stop mode (0.7 µA), and compatibility with Renesas' R8C/14 Group toolchain and debug infrastructure.
Technical Context
The R5F21143SP#U0 implements the R8C/Tiny CPU core with 89 basic instructions and 1 Mbyte unified address space. Its memory map allocates flash ROM from 0xD000–0xFFFF, fixed interrupt vector table at 0xFFDC–0xFFFF, and RAM from 0x00400–0x006FF.
It integrates dual clock generation circuits - main crystal/ceramic oscillator (XIN/XOUT) and adjustable high-speed/low-speed on-chip oscillators - alongside oscillation stop detection, voltage detection (VCA1/VCA2), and power-on reset. Peripheral control uses dedicated SFRs mapped to addresses 0x0000–0x002F and 0x0040–0x005F.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C/Tiny 16-bit, 89-instruction set, 50 ns min execution time at 20 MHz |
| Memory | 12 KB flash program ROM + 768 B RAM; no data flash (R8C/14 Group) |
| ADC | 10-bit resolution, 4 input channels (AN8–AN11), referenced to AVCC/VREF |
| Timers | Timer X (8-bit ×1), Timer Z (8-bit ×1), Timer C (16-bit ×1 with input capture/output compare) |
| Serial Interfaces | 1 UART channel + 1 SSU (chip-select synchronous serial I/O) channel |
| Supply & Power | 3.0–5.5 V operation; 9 mA typical active current @ 5 V/20 MHz; 0.7 µA stop mode |
| Temperature Range | −20°C to +85°C (standard version; no 'D' suffix) |
| Package | LSSOP-20 (PLSP0020JB-A), surface-mount, 0.65 mm pitch |
Pinout & Package
Package: 20-pin plastic molded LSSOP (PLSP0020JB-A), 0.65 mm lead pitch, 7.6 mm × 4.4 mm body size, exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (P3_5) | SSCK / CMP1_2 | SSU clock I/O or comparator 1 output; bidirectional, programmable pull-up |
| 2 (P3_7) | CNTR0 / SSO | Timer X counter input or SSU data output; shared function, direction controlled by peripheral enable |
| 3 (RESET) | Reset Input | Active-low asynchronous reset; internal pull-down, requires external pull-up for reliable release |
| 4 (XOUT) | Main Clock Output | Crystal/resonator feedback output; must be left open when using external clock source |
| 5 (VSS/AVSS) | Digital & Analog Ground | Common ground reference; AVSS should be decoupled separately from digital VSS for ADC accuracy |
| 6 (XIN) | Main Clock Input | Primary oscillator input; accepts crystal (1–20 MHz), ceramic resonator, or external CMOS clock |
| 7 (VCC) | Power Supply | 3.0–5.5 V digital/analog supply; requires 0.1 µF ceramic decoupling close to pin |
| 8 (MODE) | Boot Mode Select | Must be tied to VCC via ≥10 kΩ resistor to enable normal flash execution mode |
| 9 (P4_5) | INT0 Input | External interrupt 0 trigger; Schmitt-triggered, supports edge/level sensing via SFR configuration |
| 10 (P1_7) | CNTR00 / INT10 | Timer X channel 0 input or interrupt 10 source; dual-function pin managed by peripheral enable bits |
| 11 (P1_6) | CLK0 | UART/SSU transfer clock I/O; used for synchronous serial communication timing |
| 12 (P1_5) | RXD0 / CNTR01 / INT11 | UART receive input, Timer X channel 1 input, or interrupt 11 source; function selected by peripheral enable |
| 13 (P1_4) | TXD0 | UART transmit output; open-drain capable, supports 3.3 V/5 V level interfaces with external pull-up |
| 14 (P1_3) | KI3 / TZOUT / AN11 | Key interrupt input, Timer Z output, or ADC channel 11; analog input only when ADC enabled and port configured as input |
| 15 (P1_2) | KI2 / CMP0_2 / AN10 | Key interrupt input, comparator 0 output, or ADC channel 10; shared analog/digital functionality |
| 16 (AVCC/VREF) | Analog Supply / Reference | Connect to VCC; serves as ADC reference and analog power rail; requires local 1 µF bypass capacitor |
| 17 (P1_1) | KI1 / CMP0_1 / AN9 | Key interrupt input, comparator 0 output, or ADC channel 9; multiplexed analog/digital signal path |
| 18 (P1_0) | KI0 / CMP0_0 / AN8 | Key interrupt input, comparator 0 output, or ADC channel 8; default LED drive capability (sink up to 20 mA) |
| 19 (P3_3) | INT3 / TCIN / CMP1_0 / SSI | External interrupt 3, Timer C input, comparator 1 output, or SSU data I/O; function selected by peripheral enable |
| 20 (P3_4) | CMP1_1 / SCS | Comparator 1 output or SSU chip-select input; active-low control signal for peripheral selection |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Voltage Detection | Voltage monitor circuits (VW1C/VW2C) provide configurable brown-out reset and warning thresholds for system reliability |
| Low-Power Operating Modes | Stop mode (0.7 µA) and wait mode (35 µA) enable battery-powered sensor nodes with extended runtime |
| Hardware Watchdog Timer | 15-bit watchdog with prescaler and count-source protection prevents runaway code without external components |
| LED Drive Capability | P1_0–P1_3 support direct LED sinking (20 mA per pin) without external drivers, reducing BOM count |
| Flexible Clock System | Dual clock sources (crystal + adjustable on-chip oscillators) allow fail-safe clock switching and reduced component count |
| Interrupt Architecture | 7-level priority, 17 total interrupt sources (9 internal, 4 external, 4 software), enabling deterministic real-time response |
Applications
| Home Appliance Control | Industrial Sensor Node |
|---|---|
|
Use Scenario: Microcontroller in washing machine main control board managing motor drive sequencing, water level sensing, and user interface. IC Role / Device Role / Timing Role: Primary system controller executing real-time motor commutation logic, reading 4-channel ADC for pressure/temperature sensors, and driving LED indicators via P1_0–P1_3. Use Value: Integrated 16-bit Timer C enables precise PWM generation for brushless motor control; low-power stop mode reduces standby consumption during idle cycles. |
Use Scenario: Standalone temperature/humidity sensor node transmitting data over UART to gateway, powered by coin cell. IC Role / Device Role / Timing Role: Data acquisition and protocol handling unit sampling analog sensors (AN8–AN11), formatting UART packets, and entering stop mode between readings. Use Value: 0.7 µA stop current extends battery life beyond 5 years; built-in voltage detection ensures reliable operation down to 2.7 V supply. |
| Office Equipment | Security System Perimeter Sensor |
|
Use Scenario: Embedded controller in document scanner managing paper feed motors, CIS image sensor interface, and button/keypad inputs. IC Role / Device Role / Timing Role: Real-time coordinator of stepper motor timing (via Timer X/Z), key interrupt handling (KI0–KI3), and UART-based host communication. Use Value: Key input interrupt circuitry (KUPIC register) supports debounced matrix keypad scanning with minimal firmware overhead. |
Use Scenario: Passive infrared (PIR) motion detector with tamper switch and battery backup, installed in residential alarm systems. IC Role / Device Role / Timing Role: Low-power event processor sampling PIR analog output (AN9), monitoring tamper input (INT0), and asserting alarm signal via GPIO. Use Value: Oscillation stop detection and watchdog timer ensure continuous supervision even under clock fault conditions; −20°C to +85°C rating supports outdoor enclosure deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F21142SP | 8 KB flash, 512 B RAM; identical peripheral set and pinout | Suitable for simpler firmware with lower memory footprint; same power/performance envelope | Select when application code size remains under 8 KB and cost sensitivity outweighs memory headroom |
| R5F21153SP | 12 KB program ROM + 2 KB data flash (1 KB × 2 blocks); otherwise identical architecture and pinout | Required where field-upgradable parameter storage or data logging is needed without external EEPROM | Choose when non-volatile data storage beyond program updates is mandatory; note higher program/erase endurance (10,000 cycles) for data flash |
Compared with R5F21143SP#U0, R5F21142SP offers reduced memory at lower cost for constrained applications, while R5F21153SP adds data flash for configuration storage - neither is pin-compatible with R5F21143SP#U0 in terms of memory mapping or flash programming behavior, requiring firmware adaptation.
Availability
R5F21143SP#U0 is available at Aetrix Electronics and suitable for home appliance control, industrial sensor nodes, and office equipment requiring stable component supply and long-term production continuity.
Supply support for R5F21143SP#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 automotive, industrial, and IoT markets.
The R5F21143SP#U0 belongs to the R8C/14 Group - a cost-optimized 16-bit MCU family designed for resource-constrained embedded control in consumer and industrial applications where flash density, low power, and peripheral integration are prioritized over connectivity or advanced processing.
FAQ
What is the maximum operating frequency of the R5F21143SP#U0?
The R5F21143SP#U0 supports a maximum crystal input frequency of 20 MHz, achieving a minimum instruction execution time of 50 ns at VCC = 3.0–5.5 V. The on-chip high-speed oscillator can be adjusted to operate within 1–20 MHz ranges, but full-speed operation requires external crystal or resonator at 20 MHz. This timing applies directly to the R5F21143SP#U0 and is validated in Renesas' REJ03B0102-0200 specification.
Does the R5F21143SP#U0 include data flash memory?
No, the R5F21143SP#U0 is part of the R8C/14 Group and contains only program flash memory (12 KB). It does not integrate data flash - that feature is exclusive to the R8C/15 Group (e.g., R5F21153SP). The R5F21143SP#U0 relies on external EEPROM or FRAM for non-volatile data storage, confirmed in Table 1.3 and Section 1.1 of the official documentation.
What are the key differences between R5F21143SP#U0 and R5F21153SP?
The R5F21143SP#U0 (R8C/14) has 12 KB program flash and no data flash, while R5F21153SP (R8C/15) provides 12 KB program flash plus 2 KB data flash (1 KB × 2 blocks) with 10,000 erase/write cycles. Both share identical pinout, peripherals, and CPU core. The R5F21143SP#U0 targets cost-sensitive control; R5F21153SP adds field-updatable parameter storage - a functional distinction confirmed in Tables 1.3 and 1.4 of REJ03B0102-0200.
Which development tools support the R5F21143SP#U0?
The R5F21143SP#U0 is supported by Renesas' High-performance Embedded Workshop (HEW) IDE with C compiler, Flash Development Toolkit (FDT), and E8/E8a debug emulators. Hardware evaluation is enabled via R8C/14 Group starter kits like RTK0EM0002D01000BE. These tools are documented in Renesas Application Note U15777EJ3V0UM00 and apply specifically to the R5F21143SP#U0's R8C/14 Group classification.
What is the qualified temperature range for the R5F21143SP#U0?
The R5F21143SP#U0 is rated for −20°C to +85°C ambient operation (standard version). The 'D' suffix (e.g., R5F21143DSP) denotes the extended −40°C to +85°C grade. This specification is explicitly stated in Table 1.1 and Table 1.3 of the R8C/14 Group datasheet REJ03B0102-0200 and applies unambiguously to the R5F21143SP#U0.
R5F21143SP#U0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 20-LSSOP (0.173", 4.40mm Width)
- Series:
- R8C/1x/14
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- R8C
- Core Size:
- 16-Bit
- Speed:
- 20MHz
- Connectivity:
- SIO, SSU, UART/USART
- Peripherals:
- LED, POR, Voltage Detect, WDT
- Number of I/O:
- 13
- Program Memory Size:
- 12KB (12K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 768 x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 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:
R5F21143SP#U0 FAQ
1.How can I place an order for R5F21143SP#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F21143SP#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 R5F21143SP#U0 reliable?
The price and inventory of R5F21143SP#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F21143SP#U0 is usually 5 days.
3.What payment methods are accepted for R5F21143SP#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F21143SP#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F21143SP#U0?
R5F21143SP#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F21143SP#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 R5F21143SP#U0?
For technical support, including R5F21143SP#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F21143SP#U0 requirements.
6.How does Aetrix verify that R5F21143SP#U0 is sourced from the original manufacturer or authorized distributors?
All R5F21143SP#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 R5F21143SP#U0 meets industry standards.
7.What is the process for return or replacement of R5F21143SP#U0?
All R5F21143SP#U0 units undergo pre-shipment inspection (PSI). If there is an issue with R5F21143SP#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 R5F21143SP#U0 part is unused and in its original packaging.
Return procedure for R5F21143SP#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R5F21143SP#U0 Tags
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