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Renesas R5F2123AJFP#U0
- Part No.:
- R5F2123AJFP#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
R5F2123AJFP#U0.pdf
- Description:
- IC MCU 16BIT 96KB FLASH 48LFQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,369
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Product details
Overview
R5F2123AJFP#U0 from Renesas Electronics is a 16-bit R8C/23 Group microcontroller with CAN 2.0B interface, 96 KB program flash, 1 KB × 2 data flash, 5 KB RAM, and 10-bit 12-channel ADC - designed for automotive and industrial networking applications requiring embedded real-time control and robust serial communication.
For engineers reviewing the R5F2123AJFP#U0 datasheet, R5F2123AJFP#U0 pinout, R5F2123AJFP#U0 application, or R5F2123AJFP#U0 equivalent, this MCU delivers deterministic timing via 89-instruction R8C core, integrated LIN and UART peripherals, on-chip oscillators with frequency adjustment, and -40°C to +85°C operation in 48-pin LQFP.
Technical Context
The R5F2123AJFP#U0 implements the R8C CPU core with two register banks, 20-bit PC and INTB registers, and FLG flag register supporting interrupt priority levels (0–7), stack pointer selection (USP/ISP), and bank switching. It executes instructions in as little as 50 ns at 20 MHz.
Its peripheral set includes one CAN 2.0B module (16 message slots), hardware LIN (using Timer RA and UART0), dual UARTs, I²C bus interface, three 16-bit timer channels (Timer RD), and a 10-bit A/D converter with 12 analog inputs - all mapped to a 48-pin PLQP0048KB-A LQFP package with 0.5 mm pitch.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C 16-bit CISC core with 89 instructions and dual register banks for fast context switching |
| Max Clock Speed | 20 MHz (VCC = 3.0–5.5 V); enables 50 ns minimum instruction execution time |
| Memory | 96 KB program flash + 2 KB data flash (1 KB × 2 blocks) + 5 KB RAM - supports in-field firmware updates and parameter storage |
| ADC | 10-bit resolution, 12-channel SAR converter with internal reference; suitable for sensor signal acquisition in automotive ECUs |
| CAN Interface | Single CAN 2.0B controller with 16 message buffers; meets ISO 11898-1 for vehicle network node implementation |
| Operating Temp | -40°C to +85°C (J version); qualified for under-hood and industrial control environments |
| Package | 48-pin LQFP (PLQP0048KB-A), 7 mm × 7 mm, 0.5 mm pitch - compatible with standard SMT assembly |
Pinout & Package
Package: 48-pin plastic LQFP (PLQP0048KB-A), 7 mm × 7 mm body, 0.5 mm pin pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0_0 to P0_7 | Analog input / I/O port | 12-channel ADC inputs (AN0–AN7) plus general-purpose CMOS I/O with programmable pull-up |
| P1_0 to P1_3 | Key interrupt / ADC input | KI0–KI3 and AN8–AN11 support wake-up from low-power mode and sensor interfacing |
| P6_1 / P6_2 | CAN transceiver interface | CTX0 (CAN transmit output) and CRX0 (CAN receive input) connect directly to external CAN PHY |
| P1_4 / P1_5 | UART0 TX/RX | Full-duplex asynchronous serial interface for diagnostics, bootloader, or host communication |
| P3_3 / P3_4 / P3_5 | I²C bus interface | SDA, SCL, and SSCK pins enable multi-master I²C communication with sensors or EEPROMs |
| RESET | Active-low reset input | Asynchronous reset assertion clears CPU state and initializes peripherals; debounced externally |
| XIN / XOUT | Crystal oscillator interface | Supports 4–20 MHz crystal or ceramic resonator; XOUT is buffered output for feedback |
Key Features
| Feature | Design Value |
|---|---|
| Data Flash with 10,000 write cycles | Enables reliable nonvolatile storage of calibration data, configuration parameters, or event logs without external EEPROM |
| Hardware LIN module (Timer RA + UART0) | Reduces CPU overhead for LIN 2.x communication in body electronics and sensor networks |
| On-chip high-speed oscillator with frequency tuning | Eliminates external crystal for cost-sensitive applications while maintaining ±2% accuracy over temperature |
| Oscillation stop detection | Triggers automatic fail-safe response (e.g., switch to backup clock or enter safe state) upon XIN failure |
| Voltage detection circuit + POR | Ensures deterministic reset behavior during power ramp-up and brownout conditions down to 2.7 V |
Applications
| Automotive Body Control Module | Industrial CAN Gateway |
|---|---|
Use Scenario: Centralized control of door locks, window lifts, lighting, and HVAC actuators in passenger vehicles. IC Role / Device Role / Timing Role: Primary MCU executing real-time control logic, managing LIN slave nodes, and communicating via CAN 2.0B with engine and chassis modules. Use Value: Integrated CAN + LIN + data flash reduces BOM count and enables field-updatable calibration tables for regional variants. |
Use Scenario: Protocol translation between CAN-based PLCs and RS-485 Modbus devices in factory automation systems. IC Role / Device Role / Timing Role: Bridge controller handling CAN message filtering, buffering, and UART-to-CAN frame conversion with deterministic latency. Use Value: On-chip 10-bit ADC monitors power supply health; dual UARTs support simultaneous debug and fieldbus interfaces. |
| Smart Sensor Node | Medical Diagnostic Equipment |
Use Scenario: Battery-powered environmental sensor (temperature, humidity, CO₂) transmitting data over CAN bus in building management systems. IC Role / Device Role / Timing Role: Low-power sensing hub with ADC acquisition, data preprocessing, and CAN message formatting. Use Value: Data flash stores sensor calibration coefficients; voltage detection ensures graceful shutdown before brownout. |
Use Scenario: Front-end signal conditioning and communication module in portable ultrasound or ECG analyzers. IC Role / Device Role / Timing Role: Real-time acquisition of analog biosignals via 12-channel ADC, isolation-aware UART communication to host processor. Use Value: 10-bit resolution and 12-input flexibility support multi-lead ECG; -40°C to +85°C rating accommodates clinical environment thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F21238JFP | 64 KB program flash, same 2 KB data flash, identical peripheral set and pinout | Limited firmware complexity; suitable where code size < 64 KB suffices | Select when lower memory footprint reduces cost without sacrificing CAN/LIN capability |
| R5F2123CJFP | 128 KB program flash, same 2 KB data flash, identical peripheral set and pinout | Complex firmware with RTOS, multiple communication stacks, or large lookup tables | Choose for future-proofing or applications requiring >96 KB code space |
Compared with R5F21238JFP and R5F2123CJFP, the R5F2123AJFP#U0 offers optimal balance of code capacity (96 KB), data retention (10,000-cycle data flash), and CAN/LIN integration - making it ideal for mid-complexity automotive and industrial controllers where memory headroom and field update capability are critical.
Availability
R5F2123AJFP#U0 is available at Aetrix Electronics and suitable for automotive body control, industrial CAN gateways, smart sensor nodes, and medical diagnostic equipment requiring stable component supply across extended product lifecycles.
Supply support for R5F2123AJFP#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 R8C/23 Group, including R5F2123AJFP#U0, was engineered for cost-sensitive, real-time embedded control in automotive networking and industrial automation - emphasizing CAN 2.0B reliability, integrated LIN, and robust flash endurance.
FAQ
What is the maximum operating frequency of the R5F2123AJFP#U0?
The R5F2123AJFP#U0 operates at up to 20 MHz when supplied with VCC = 3.0–5.5 V, achieving a minimum instruction execution time of 50 ns. At 10 MHz (VCC = 2.7–5.5 V), execution time extends to 100 ns - enabling flexible trade-offs between performance and power consumption in battery-powered or thermally constrained designs.
Does the R5F2123AJFP#U0 include an integrated CAN transceiver?
No, the R5F2123AJFP#U0 integrates only the CAN protocol controller (meeting ISO 11898-1 CAN 2.0B specification with 16 message slots). An external CAN physical layer transceiver (e.g., TJA1042 or SN65HVD230) must be used on CTX0 and CRX0 pins to complete the CAN interface.
How many times can the data flash in the R5F2123AJFP#U0 be rewritten?
The data flash in the R5F2123AJFP#U0 is rated for 10,000 write/erase cycles per block (1 KB × 2 blocks), significantly exceeding standard program flash endurance (1,000 cycles). This allows frequent updates of calibration data, device configuration, or runtime logs without premature wear-out.
Is the R5F2123AJFP#U0 pin-compatible with other R8C/23 Group MCUs?
Yes, the R5F2123AJFP#U0 shares identical 48-pin PLQP0048KB-A packaging and full pin-to-pin compatibility with all R8C/23 Group variants (e.g., R5F21236JFP, R5F2123CJFP), enabling drop-in replacement across memory configurations while preserving PCB layout and peripheral routing.
What development tools support the R5F2123AJFP#U0?
Renesas provides the HEW (High-performance Embedded Workshop) IDE, Flash Development Toolkit (FDT), and E8/E10 emulator debuggers for the R5F2123AJFP#U0. Third-party toolchains including IAR Embedded Workbench for Renesas R8C also offer full compiler, debugger, and flash programming support.
R5F2123AJFP#U0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 48-LQFP
- Series:
- R8C/2x/23
- Packaging:
- Tray
- Product Status:
- Not For New Designs
- Programmable:
- Not Verified
- Core Processor:
- R8C
- Core Size:
- 16-Bit
- Speed:
- 20MHz
- Connectivity:
- CANbus, I2C, LINbus, SIO, SSU, UART/USART
- Peripherals:
- POR, Voltage Detect, WDT
- Number of I/O:
- 41
- Program Memory Size:
- 96KB (96K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 2K x 8
- RAM Size:
- 5K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- A/D 12x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F2123AJFP#U0 FAQ
1.How can I place an order for R5F2123AJFP#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F2123AJFP#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 R5F2123AJFP#U0 reliable?
The price and inventory of R5F2123AJFP#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F2123AJFP#U0 is usually 5 days.
3.What payment methods are accepted for R5F2123AJFP#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F2123AJFP#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F2123AJFP#U0?
R5F2123AJFP#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F2123AJFP#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 R5F2123AJFP#U0?
For technical support, including R5F2123AJFP#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F2123AJFP#U0 requirements.
6.How does Aetrix verify that R5F2123AJFP#U0 is sourced from the original manufacturer or authorized distributors?
All R5F2123AJFP#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 R5F2123AJFP#U0 meets industry standards.
7.What is the process for return or replacement of R5F2123AJFP#U0?
All R5F2123AJFP#U0 units undergo pre-shipment inspection (PSI). If there is an issue with R5F2123AJFP#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 R5F2123AJFP#U0 part is unused and in its original packaging.
Return procedure for R5F2123AJFP#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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