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Renesas R5F21294SDSP#U0
- Part No.:
- R5F21294SDSP#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 20-LSSOP (0.173", 4.40mm Width)
- Datasheet:
-
R5F21294SDSP#U0.pdf
- Description:
- IC MCU 16BIT 16KB FLASH 20LSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,201
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Product details
Overview
R5F21294SDSP#U0 from Renesas Electronics is a 16-bit R8C/29 Group single-chip microcontroller with 16 KB flash program memory, 1 KB × 2 on-chip data flash, and 1 KB RAM, operating at up to 20 MHz (50 ns min instruction time) across VCC = 3.0–5.5 V. It integrates UART0/UART1, I²C bus interface, LIN hardware module, 10-bit 4-channel ADC, and four 8-/16-bit timers - deployed in industrial control panels requiring embedded real-time monitoring and communication.
For engineers reviewing the R5F21294SDSP#U0 datasheet, R5F21294SDSP#U0 pinout, R5F21294SDSP#U0 application, or R5F21294SDSP#U0 equivalent, key selection considerations include its -40°C to +85°C industrial temperature grade (D version), 20-pin LSSOP package (PLSP0020JB-A), dual data flash blocks for firmware/data separation, and hardware LIN support via Timer RA + UART0.
Technical Context
The R5F21294SDSP#U0 implements the R8C CPU core with 89 fundamental instructions and 1 Mbyte linear address space. Its memory architecture separates 16 KB program ROM from two independent 1 KB data flash blocks - enabling simultaneous code execution and nonvolatile data logging without interrupting operation.
Peripheral integration includes dedicated hardware LIN transceiver logic tied to Timer RA and UART0, real-time clock capability via Timer RE (D version), and three independent clock generation circuits: XIN-based crystal oscillator, high-speed/low-speed on-chip oscillators (with frequency adjustment), and XCIN/XCOUT 32 kHz RTC oscillator (D version only).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C 16-bit CISC core with register bank switching and 20-bit PC |
| Flash Memory | 16 KB program ROM + 1 KB × 2 data flash (10,000 erase/write cycles) |
| RAM | 1 KB internal SRAM for variables, stack, and subroutine context |
| Operating Voltage | 3.0–5.5 V - supports direct interface with 3.3 V and 5 V logic systems |
| Max Clock Speed | 20 MHz (50 ns min instruction time) - enables deterministic real-time response ≤50 ns |
| Temp Grade | -40°C to +85°C (D version) - qualified for industrial ambient environments |
| Package | 20-pin LSSOP (PLSP0020JB-A) - surface-mount, 0.65 mm pitch, footprint-compatible with R8C/28/29 family |
Pinout & Package
20-pin molded-plastic LSSOP (PLSP0020JB-A), 7.6 mm × 4.4 mm body, 0.65 mm lead pitch, exposed pad not present.
| 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 |
| P3_4 / SDA / SCS / TRCIOC | Shared peripheral pin | I²C data line, chip-select for synchronous serial, or Timer RC capture input |
| XIN / XCIN / P4_6 | Clock input | Accepts crystal (XIN mode) or 32 kHz RTC crystal (XCIN mode, D version only) |
| RESET | Active-low reset | Hardware reset initiation with internal pull-up; debounced externally recommended |
| MODE | Boot configuration | Must be pulled high via resistor to enable normal flash execution mode |
Key Features
| Feature | Design Value |
|---|---|
| Hardware LIN Module | Full LIN 2.0/2.1 protocol handling via Timer RA + UART0 - eliminates software bit-banging overhead |
| Dual Data Flash Blocks | Two independent 1 KB blocks allow background data logging while executing application code from program ROM |
| Real-Time Clock (RTC) | Timer RE provides calendar-clock functionality with compare match - usable for time-stamped event logging |
| Low-Power Stop Mode | 0.7 µA typical current at 3.0 V - enables battery-backed operation for extended idle periods |
| On-Chip Oscillators | High-speed (adjustable) and low-speed on-chip oscillators eliminate external timing components for basic operation |
Applications
| Industrial Control Panel | Automotive Body Controller |
|---|---|
Use Scenario: Embedded HMI controller in factory automation panel with push-button inputs, LED indicators, and RS-485 gateway. IC Role / Device Role / Timing Role: Main MCU executing control logic, scanning 8-key matrix via KI0–KI3, driving LEDs through P1_0–P1_7, and managing UART0-to-RS485 translation. Use Value: Dual data flash stores calibration offsets and fault logs independently of firmware; RTC timestamps maintenance events. | Use Scenario: Door module controller managing window lift, mirror fold, and interior lighting in passenger vehicles. IC Role / Device Role / Timing Role: LIN slave node communicating with central body ECU via hardware LIN module (Timer RA + UART0), reading potentiometer position (AN8–AN11), and driving DC motors. Use Value: -40°C to +85°C rating ensures reliability across vehicle cabin thermal zones; 20-pin LSSOP simplifies PCB layout in space-constrained modules. |
| Smart Appliance Interface | Energy Monitoring Gateway |
Use Scenario: User interface and sensor aggregator in smart HVAC system with temperature/humidity sensors and display backlight control. IC Role / Device Role / Timing Role: Reads 4-channel 10-bit ADC (AN8–AN11) for environmental sensing, drives 8-segment LED via P1_0–P1_7, and communicates via I²C to display driver IC. Use Value: Integrated I²C and UART peripherals reduce external component count; low-power wait mode (2.0 µA) extends battery life in portable service tools. | Use Scenario: Sub-metering gateway collecting current/voltage samples from CT sensors and reporting via UART to cloud-connected modem. IC Role / Device Role / Timing Role: Simultaneous sampling of 4 analog channels at configurable intervals using ADC trigger from Timer RC, storing results in data flash blocks. Use Value: 10,000-cycle data flash endurance supports >2 years of daily log writes; 16 KB program ROM accommodates secure OTA update stack. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F21294JSP | Same 16 KB program ROM, 1 KB × 2 data flash, and 1 KB RAM; identical pinout and peripherals; J version rated -40°C to +85°C (same temp range as R5F21294SDSP#U0) | No XCIN/XCOUT RTC oscillator - lacks hardware real-time clock capability | Select R5F21294JSP only if RTC functionality is unnecessary and cost optimization is prioritized |
| R5F21296SDSP | 32 KB program ROM, same 1 KB × 2 data flash and 1 KB RAM; identical peripherals and pinout; D version temperature grade retained | Higher ROM capacity supports larger firmware images with integrated crypto or communication stacks | Choose R5F21296SDSP when future firmware expansion or feature-rich protocol stacks (e.g., Modbus TCP offload) are anticipated |
Compared with R5F21294JSP, R5F21294SDSP#U0 adds XCIN/XCOUT RTC support critical for timestamped logging; versus R5F21296SDSP, it trades ROM headroom for lower unit cost while retaining identical data flash, timer, and communication capabilities required for most industrial edge nodes.
Availability
R5F21294SDSP#U0 is available at Aetrix Electronics and suitable for industrial control panels, automotive body electronics, and smart appliance interfaces requiring stable component supply across extended product lifecycles.
Supply support for R5F21294SDSP#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/29 Group, including R5F21294SDSP#U0, was designed for cost-sensitive, real-time embedded applications demanding integrated communication (LIN/I²C/UART), analog sensing, and nonvolatile data storage in compact industrial and automotive modules.
FAQ
What is the maximum operating frequency and corresponding supply voltage range for R5F21294SDSP#U0?
R5F21294SDSP#U0 operates at up to 20 MHz with a minimum instruction execution time of 50 ns, requiring VCC = 3.0–5.5 V. At lower frequencies (e.g., 10 MHz), it supports down to 2.7 V, and at 5 MHz, down to 2.2 V - enabling flexible power design across mixed-voltage systems. This specification is confirmed in Table 1.2 of the R8C/29 Group datasheet (Rev. 2.10).
Does R5F21294SDSP#U0 include hardware LIN support, and how is it implemented?
Yes, R5F21294SDSP#U0 includes dedicated hardware LIN 2.0/2.1 support implemented via tight coupling between Timer RA and UART0 - eliminating software bit-banging. The LIN module handles break detection, sync field processing, and checksum calculation autonomously. This is documented in Section 1.2 "Peripheral Functions" and Figure 1.1 block diagram of the R8C/29 Group datasheet.
What are the data flash endurance and organization for R5F21294SDSP#U0?
R5F21294SDSP#U0 contains two independent 1 KB data flash blocks (1 KB × 2), each rated for 10,000 erase/write cycles. This structure allows one block to be rewritten while the other retains valid data - essential for robust firmware update and logging applications. The value is specified in Table 1.2 under "Flash Memory" in the R8C/29 Group datasheet.
Which pins on R5F21294SDSP#U0 support analog input, and what is the ADC resolution?
R5F21294SDSP#U0 supports analog input on pins P1_0 (AN8), P1_1 (AN9), P1_2 (AN10), and P1_3 (AN11), forming a 4-channel, 10-bit successive-approximation ADC. Each channel can be individually selected and configured via ADC control registers. This is confirmed in Table 1.5 "Pin Functions" and Section 1.2 "Peripheral Functions" of the R8C/29 Group datasheet.
Is the R5F21294SDSP#U0 pin-compatible with other R8C/29 Group MCUs such as R5F21292SDSP or R5F21296SDSP?
Yes, R5F21294SDSP#U0 is fully pin-compatible with all R8C/29 Group variants in the 20-pin LSSOP package (PLSP0020JB-A), including R5F21292SDSP and R5F21296SDSP. Pin assignments, electrical characteristics, and peripheral mappings are identical - only memory capacities differ. This compatibility is verified in Figures 1.4 and 1.5 and Tables 1.3–1.4 of the R8C/29 Group datasheet.
R5F21294SDSP#U0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 20-LSSOP (0.173", 4.40mm Width)
- Series:
- R8C/2x/29
- 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:
- 2K x 8
- RAM Size:
- 1K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.2V ~ 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:
R5F21294SDSP#U0 FAQ
1.How can I place an order for R5F21294SDSP#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F21294SDSP#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 R5F21294SDSP#U0 reliable?
The price and inventory of R5F21294SDSP#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F21294SDSP#U0 is usually 5 days.
3.What payment methods are accepted for R5F21294SDSP#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F21294SDSP#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F21294SDSP#U0?
R5F21294SDSP#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F21294SDSP#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 R5F21294SDSP#U0?
For technical support, including R5F21294SDSP#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F21294SDSP#U0 requirements.
6.How does Aetrix verify that R5F21294SDSP#U0 is sourced from the original manufacturer or authorized distributors?
All R5F21294SDSP#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 R5F21294SDSP#U0 meets industry standards.
7.What is the process for return or replacement of R5F21294SDSP#U0?
All R5F21294SDSP#U0 units undergo pre-shipment inspection (PSI). If there is an issue with R5F21294SDSP#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 R5F21294SDSP#U0 part is unused and in its original packaging.
Return procedure for R5F21294SDSP#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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