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Renesas R5F10378ANA#U0
- Part No.:
- R5F10378ANA#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
R5F10378ANA#U0.pdf
- Description:
- IC MCU 16BIT 8KB FLASH 24HWQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,009
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Product details
Overview
R5F10378ANA#U0 from Renesas Electronics is a 24-pin HWQFN-packaged RL78/G12 16-bit microcontroller designed for ultra-low-power embedded control in consumer and industrial applications. It features 8 KB code flash, 512 B RAM, 1.8–5.5 V operation, 24 MHz high-speed on-chip oscillator (±5% accuracy), and 10-bit 8-channel ADC - deployed in battery-powered sensor nodes and smart home controllers requiring deterministic real-time response.
For engineers reviewing the R5F10378ANA#U0 datasheet, R5F10378ANA#U0 pinout, R5F10378ANA#U0 application, or R5F10378ANA#U0 equivalent, key selection criteria include its 24-pin HWQFN footprint, absence of data flash memory, single UART channel, no DMA controller, and support for -40°C to +85°C ambient operation with consumer-grade qualification (A-suffix).
Technical Context
The R5F10378ANA#U0 implements the RL78 CPU core with 3-stage pipeline CISC architecture, 1 MB address space, and 8×8-bit register banks. Its clock system integrates a ±5% accurate 1–24 MHz high-speed on-chip oscillator and a 15 kHz low-speed oscillator, enabling HALT/STOP/SNOOZE power modes down to 63 μA/MHz.
Peripheral integration includes one 16-bit timer array (TAU0) with four channels, one watchdog timer, one 12-bit interval timer, simplified SPI (CSI00 only), UART0, and I²C-compatible IICA0 interface - all configured via peripheral I/O redirection register (PIOR) for flexible pin assignment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | RL78 16-bit CISC CPU with 3-stage pipeline and 1 MB address space - enables deterministic interrupt latency and compact code density for resource-constrained firmware. |
| Flash / RAM | 8 KB code flash (1 KB block size) + 512 B RAM - sufficient for standalone motor control or sensor fusion algorithms without external memory. |
| Operating Voltage | 1.8 V to 5.5 V - supports direct interfacing with Li-ion, alkaline, or USB-powered systems without level-shifting. |
| ADC | 10-bit resolution, 8 input channels, internal 1.45 V reference - suitable for precision analog sensing in thermostats and environmental monitors. |
| Timers | 4-channel 16-bit TAU0 + 1-channel 12-bit interval timer + 1-window watchdog - provides PWM generation, periodic wake-up, and safety supervision. |
| Oscillator Accuracy | ±5% over -40°C to +85°C - adequate for UART communication at 9600–115200 bps without external crystal. |
| Package | HWQFN-24, 4 × 4 mm, 0.5 mm pitch - enables compact PCB layout for space-constrained IoT edge devices. |
Pinout & Package
Package: HWQFN-24 (4 × 4 mm, 0.5 mm pitch), exposed die pad (to be connected to VSS), compliant with JEDEC MO-220.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P10/ANI16/PCLBUZ0/SCK00/SCL00 | Port 1 bit 0 / Analog input / Buzzer output / SPI clock / I²C clock | Multi-function pin configurable as UART/SPI/I²C interface or programmable tone generator - reduces external components in audio feedback designs. |
| P11/ANI17/SI00/RxD0/SDA00/TOOLRxD | Port 1 bit 1 / Analog input / SPI input / UART receive / I²C data / debug RX | Shared serial interface and debug path - allows in-system programming and host communication over same pins. |
| P12/ANI18/SO00/TxD0/TOOLTxD | Port 1 bit 2 / Analog input / SPI output / UART transmit / debug TX | Enables full-duplex UART or SPI master/slave operation while retaining analog sensing capability. |
| P13/ANI19/TI00/TO00/INTP2 | Port 1 bit 3 / Analog input / Timer input / Timer output / External interrupt | Supports edge-triggered wake-up, pulse-width measurement, and hardware PWM output simultaneously. |
| P14/ANI20/TI01/TO01/INTP3 | Port 1 bit 4 / Analog input / Timer input / Timer output / External interrupt | Dual timer I/O with interrupt capability - ideal for quadrature encoder decoding or dual-sensor timing capture. |
| P20/ANI0/AVREFP | Port 2 bit 0 / Analog input / ADC positive reference | Configurable as dedicated ADC reference voltage source - improves measurement stability when using external sensors. |
| P21/ANI1/AVREFM | Port 2 bit 1 / Analog input / ADC negative reference | Provides differential reference for ratiometric measurements - enhances accuracy in bridge-based transducer interfaces. |
| P22/ANI2 | Port 2 bit 2 / Analog input | General-purpose analog input supporting temperature sensor and internal reference - enables self-calibration routines. |
| P23/ANI3 | Port 2 bit 3 / Analog input | Additional analog channel for multi-sensor aggregation - used in air quality monitors with CO₂, humidity, and VOC inputs. |
| P40/KR0/TOOL0 | Port 4 bit 0 / Key return / Debug I/O | Hardware key-scan input with built-in debounce - eliminates external RC networks in keypad-based HMI designs. |
| P41/ANI22/SO01/SDA01/TI02/TO02/INTP1 | Port 4 bit 1 / Analog input / SPI output / I²C data / Timer I/O / Interrupt | Combines analog sensing, serial comms, and timing functions - simplifies design of multi-protocol sensor hubs. |
| P42/ANI21/SCK01/SCL01/TI03/TO03 | Port 4 bit 2 / Analog input / SPI clock / I²C clock / Timer I/O | Enables second SPI or I²C interface without external bus switch - supports daisy-chained sensor networks. |
| P60/KR4/SCLA0/(TxD0) | Port 6 bit 0 / Key return / I²C clock / UART transmit | Shared I²C clock and UART TX - allows fallback communication if primary UART fails in safety-critical systems. |
| P61/KR5/SDAA0/(RxD0) | Port 6 bit 1 / Key return / I²C data / UART receive | Shared I²C data and UART RX - reduces pin count in cost-sensitive remote controls and BLE gateway modules. |
| P121/KR3/X1/(TI03)/(INTP3) | Port 12 bit 1 / Key return / Crystal input / Timer input / Interrupt | Crystal oscillator input with optional timer/interrupt function - supports fail-safe clock monitoring during X1 startup. |
| P122/KR2/X2/EXCLK/(TI02)/(INTP2) | Port 12 bit 2 / Key return / Crystal output / External clock / Timer input / Interrupt | Crystal output with EXCLK option - enables synchronous clock distribution to companion ICs like ADCs or RF transceivers. |
| P125/KR1/SI01/RESET | Port 12 bit 5 / Key return / SPI input / Reset input | Dual-role reset/SPI input - allows hardware reset assertion or SPI command injection during field firmware updates. |
| VDD | Power supply | Single 1.8–5.5 V supply - eliminates need for LDO regulators in multi-rail systems. |
| VSS | Ground | Reference for all digital and analog circuits - must connect to exposed die pad for thermal and EMI performance. |
| P00–P03 | Port 0 bits 0–3 / Key return | Dedicated key-scan inputs with internal pull-ups - supports up to 10-key matrix without external components. |
| P137/INTP0 | Port 13 bit 7 / External interrupt | High-priority wake-up source for motion detection or alarm events - responds within 4 CPU cycles after edge detection. |
| INDEX MARK | Package orientation marker | Ensures correct placement during automated assembly - critical for 0.5 mm pitch QFN reflow yield. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low power consumption | 63 μA/MHz active current enables >5-year battery life in coin-cell-powered wireless sensors. |
| SNOOZE mode operation | Permits background ADC sampling and UART reception while CPU remains halted - reduces average system power by 70%. |
| On-chip debug interface | Single-wire debug (SWD) support enables non-intrusive firmware validation without JTAG header footprint. |
| Programmable clock/buzzer output | PCLBUZ0 generates precise 2.44 kHz–10 MHz tones or clock signals - replaces external oscillators in audio alert and clock distribution circuits. |
| Peripheral I/O redirection | PIOR register allows dynamic remapping of UART, SPI, and timer functions to alternate pins - increases PCB routing flexibility. |
| 1.8 V minimum operating voltage | Supports direct connection to 2-cell alkaline or single LiFePO₄ batteries - eliminates boost converters in portable medical devices. |
Applications
| Smart Thermostat Control | Wireless Sensor Node |
|---|---|
|
Use Scenario: Local temperature/humidity regulation with BLE connectivity and LCD display. IC Role / Device Role / Timing Role: Main system controller managing ADC sampling, PID loop execution, display refresh, and UART-to-BLE bridge. Use Value: 8 KB flash stores closed-loop control firmware and OTA update buffer; 10-bit ADC resolves 0.1°C temperature steps; SNOOZE mode extends CR2032 battery life to 3+ years. |
Use Scenario: Battery-powered environmental monitor transmitting CO₂, VOC, and pressure data via LoRaWAN. IC Role / Device Role / Timing Role: Sensor aggregator with autonomous wake-up, multi-channel ADC sequencing, and low-power radio interface control. Use Value: 63 μA/MHz active current and STOP mode (0.55 μA) minimize energy per measurement cycle; 24-pin HWQFN fits sub-10 mm² PCB area. |
| Industrial Keypad Interface | Appliance Motor Controller |
|
Use Scenario: 10-key membrane keypad with LED feedback and RS-485 communication in HVAC panels. IC Role / Device Role / Timing Role: Dedicated HMI processor handling key scan, LED PWM dimming, and protocol translation. Use Value: KR0–KR9 key return inputs eliminate external shift registers; PCLBUZ0 drives piezo alerts; UART0 supports Modbus RTU framing. |
Use Scenario: Brushless DC motor commutation in cordless power tools with hall-effect position sensing. IC Role / Device Role / Timing Role: Real-time motor controller executing FOC algorithms and generating 3-phase PWM waveforms. Use Value: Four 16-bit TAU0 channels deliver synchronized 20 kHz PWM outputs; 1.8 V operation enables direct MCU supply from motor driver's LDO. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F10278ANA#U0 | Includes 2 KB data flash, ±1% oscillator accuracy, DMA controller, CRC engine, and RAM guard - absent in R5F10378ANA#U0. | Required for firmware-over-the-air (FOTA) storage, high-accuracy timing-critical UART, or safety-certified checksum operations. | Select R5F10278ANA#U0 when data logging, secure boot, or ASIL-B compliance is required - otherwise R5F10378ANA#U0 offers lower cost and simpler qualification. |
| R5F10379ANA#U0 | Same package and core, but with 12 KB code flash and identical peripheral set - no data flash or DMA. | Needed for larger firmware images (e.g., Bluetooth stack + application logic) without external memory expansion. | Choose R5F10379ANA#U0 when firmware size exceeds 8 KB but data flash is unnecessary - maintains identical power profile and pin compatibility. |
Compared with R5F10278ANA#U0, the R5F10378ANA#U0 trades data flash, tighter oscillator tolerance, and safety peripherals for lower unit cost and reduced qualification overhead; versus R5F10379ANA#U0, it sacrifices 4 KB flash capacity to meet tight BOM cost targets in high-volume consumer products.
Availability
R5F10378ANA#U0 is available at Aetrix Electronics and suitable for smart thermostat control, wireless sensor node deployment, and industrial keypad interface applications requiring stable component supply across multi-year production cycles.
Supply support for R5F10378ANA#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 delivering trusted embedded solutions for automotive, industrial, infrastructure, and IoT markets, with annual revenue exceeding $10 billion.
The RL78/G12 product line delivers ultra-low-power 16-bit MCUs optimized for cost-sensitive, battery-operated, and general-purpose control applications - emphasizing energy efficiency, integrated analog, and simplified development.
FAQ
What is the maximum operating frequency and voltage range supported by the R5F10378ANA#U0?
The R5F10378ANA#U0 operates at up to 24 MHz using its high-speed on-chip oscillator and supports a wide supply voltage range of 1.8 V to 5.5 V. This allows direct integration into systems powered by single-cell Li-ion, dual alkaline, or USB sources without external voltage regulation - and ensures reliable timing performance across battery discharge curves in portable R5F10378ANA#U0 designs.
Does the R5F10378ANA#U0 include data flash memory?
No, the R5F10378ANA#U0 does not include data flash memory. Unlike the R5F102xx series, the R5F103xx family omits the 2 KB data flash block - meaning non-volatile parameter storage must be implemented externally or in code flash with wear-leveling software. This omission reduces cost and simplifies qualification for R5F10378ANA#U0 in high-volume consumer applications where field firmware updates are not required.
How many UART, SPI, and I²C interfaces does the R5F10378ANA#U0 support?
The R5F10378ANA#U0 supports one UART channel (UART0), one simplified SPI interface (CSI00), and one I²C-compatible interface (IICA0). It does not include simplified I²C (IIC00/IIC01) or additional UART/CSI channels found in higher-pin-count or R5F102xx variants - making it ideal for point-to-point communication in compact nodes where protocol diversity is secondary to power and cost efficiency in R5F10378ANA#U0 implementations.
What power-saving modes are available on the R5F10378ANA#U0?
The R5F10378ANA#U0 supports HALT, STOP, and SNOOZE low-power modes. HALT stops the CPU while peripherals remain active; STOP disables the high-speed oscillator and most peripherals, drawing just 0.55 μA; SNOOZE allows selected peripherals (e.g., ADC, UART) to operate autonomously while the CPU sleeps - enabling event-driven wake-up with minimal latency in R5F10378ANA#U0 battery-powered applications.
Is the R5F10378ANA#U0 pin-compatible with other RL78/G12 devices in the 24-pin HWQFN package?
Yes, the R5F10378ANA#U0 shares identical pinout and package dimensions (HWQFN-24, 4 × 4 mm) with all other RL78/G12 24-pin variants including R5F1027x and R5F1037x families. However, functional differences exist - such as absence of DMA, data flash, or simplified I²C - so firmware and schematic design must align with R5F10378ANA#U0's specific peripheral set despite mechanical compatibility.
R5F10378ANA#U0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 24-WFQFN Exposed Pad
- Series:
- RL78/G12
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- RL78
- Core Size:
- 16-Bit
- Speed:
- 24MHz
- Connectivity:
- CSI, I2C, UART/USART
- Peripherals:
- LVD, POR, PWM, WDT
- Number of I/O:
- 18
- Program Memory Size:
- 8KB (8K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 768 x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 5.5V
- Data Converters:
- A/D 11x8/10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F10378ANA#U0 FAQ
1.How can I place an order for R5F10378ANA#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F10378ANA#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 R5F10378ANA#U0 reliable?
The price and inventory of R5F10378ANA#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F10378ANA#U0 is usually 5 days.
3.What payment methods are accepted for R5F10378ANA#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F10378ANA#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F10378ANA#U0?
R5F10378ANA#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F10378ANA#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 R5F10378ANA#U0?
For technical support, including R5F10378ANA#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F10378ANA#U0 requirements.
6.How does Aetrix verify that R5F10378ANA#U0 is sourced from the original manufacturer or authorized distributors?
All R5F10378ANA#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 R5F10378ANA#U0 meets industry standards.
7.What is the process for return or replacement of R5F10378ANA#U0?
All R5F10378ANA#U0 units undergo pre-shipment inspection (PSI). If there is an issue with R5F10378ANA#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 R5F10378ANA#U0 part is unused and in its original packaging.
Return procedure for R5F10378ANA#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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