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Renesas R5F10NMEDFB#50
- Part No.:
- R5F10NMEDFB#50
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 80-LQFP
- Datasheet:
-
R5F10NMEDFB#50.pdf
- Description:
- IC MCU 16BIT 64KB FLASH 80LFQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,114
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Product details
Overview
R5F10NMEDFB#50 from Renesas is an RL78/I1C 80-pin ultra-low-power 16-bit MCU with 128 KB flash, 8 KB RAM, 2 KB data flash, hardware AES-128/192/256, independent power supply RTC, and 24-bit ΔΣ A/D converter - designed for electric AMI power meter applications requiring secure metering, long battery life, and high-precision energy measurement.
For engineers reviewing the R5F10NMEDFB#50 datasheet, R5F10NMEDFB#50 pinout, R5F10NMEDFB#50 application, or R5F10NMEDFB#50 equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, and confirmed alternative options for secure, low-power smart metering systems.
Technical Context
The R5F10NMEDFB#50 implements the RL78 CPU core with CISC architecture, 3-stage pipeline, and selectable minimum instruction execution time (0.04167 µs @ 24 MHz high-speed on-chip oscillator). It integrates a dedicated 24-bit ΔΣ A/D converter with four channels, supporting high-accuracy current/voltage sensing in energy metering front-ends.
Its power management includes HALT, STOP, and SNOOZE modes, independent VRTC supply with RTC power-on-reset (RTCPOR), and voltage detectors for VDD, VBAT, VRTC, and EXLVD - enabling robust operation across –40°C to +85°C industrial environments while maintaining sub-µA RTC backup current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | RL78 16-bit CISC CPU with 3-stage pipeline and 1 MB address space |
| Flash / RAM | 128 KB code flash (1 KB block size) + 8 KB on-chip RAM - supports self-programming with boot swap |
| ΔΣ ADC | 24-bit resolution, 4-channel ΔΣ A/D converter - enables Class 0.2 active energy measurement per IEC 62053 |
| AES Engine | Hardware AES with GCM/ECB/CBC modes and 128/192/256-bit keys - accelerates secure firmware updates and metrology data encryption |
| RTC | Independent power supply RTC with calendar (99 years), alarm, clock correction, and 1 Hz/64 Hz output - maintains time during main power loss |
| Operating Voltage | 1.9 V to 5.5 V single supply - supports direct connection to lithium primary batteries and AC-derived rails |
| Temp Range | –40°C to +85°C ambient - qualified for outdoor electricity meter enclosures and industrial utility infrastructure |
Pinout & Package
80-pin plastic LFQFP (12 × 12 mm, 0.5 mm pitch), RoHS-compliant, embossed tape packaging (#50 variant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P07 | TxD0 / TOOLTxD / SEG37 | Primary UART transmit for communication with metrology ICs or PLC modems; also drives LCD segment 37 |
| P06 | RxD0 / TOOLRxD / SDA00 / SEG36 | UART receive + I²C data line + debug interface input - enables dual-role serial diagnostics and sensor bus control |
| P05 | SCK00 / SCL00 / INTP3 / SEG35 | Shared SPI clock / I²C clock / interrupt input - simplifies peripheral expansion with minimal pin count |
| P150 | RTCOUT / RTCIC0 | Dual-function RTC output (1 Hz/64 Hz) and time capture input - supports precise timestamping of energy events |
| VRTC | RTC Power Supply | Dedicated 1.6 V min supply rail - isolates RTC from main VDD fluctuations to prevent time drift during brownouts |
| REGC | ΔΣ ADC Regulator Capacitor | Connects to VSS via 0.47–1 µF capacitor - stabilizes internal reference for ±0.001% ΔΣ ADC linearity |
Key Features
| Feature | Design Value |
|---|---|
| True Low-Power Platform | Halt mode current < 0.5 µA and STOP mode < 0.25 µA - extends 10-year battery life in AMI endpoints |
| Hardware AES Acceleration | Zero-cycle overhead encryption/decryption - enables real-time secure DLMS/COSEM message handling without CPU load |
| Independent Power Supply RTC | Retains time accuracy ±2 ppm over temperature with VRTC backup - eliminates need for external RTC IC |
| 24-Bit ΔΣ A/D Converter | 24-bit resolution with built-in digital filter - achieves >110 dB SNR for shunt-based current sensing at 50/60 Hz |
| Background Data Flash Rewrite | BGO allows full CPU execution during 1M-cycle data flash writes - enables seamless firmware field updates |
Applications
| Smart Electricity Meter (AMI) | Prepayment Energy Meter |
|---|---|
Use Scenario: Residential or commercial smart meter measuring active/reactive energy, demand, and power quality per IEC 62053-21/22. IC Role / Device Role / Timing Role: Main metrology controller executing DLMS/COSEM stack, managing ΔΣ ADC sampling, AES-encrypted data upload, and RTC-synchronized billing cycles. Use Value: Integrated 24-bit ΔΣ ADC and hardware AES eliminate external signal conditioning and crypto co-processors - reducing BOM cost by $1.20 and PCB area by 18 mm². | Use Scenario: Pay-as-you-go meter with local credit validation, tamper detection, and prepaid token processing. IC Role / Device Role / Timing Role: Secure host processor validating encrypted tokens, updating remaining credit in protected data flash, and enforcing disconnection via relay driver outputs. Use Value: On-chip AES GCM mode provides authenticated encryption for token payloads - preventing replay and cloning attacks without external security IC. |
| Grid Edge Sensor Node | Transformer Monitoring Unit |
Use Scenario: Distributed grid sensor collecting voltage sag/swell, harmonics, and frequency deviation at distribution transformers. IC Role / Device Role / Timing Role: Low-power acquisition node performing synchronized 16 kHz sampling via ΔΣ ADC, storing waveform snippets in RAM, and transmitting via UART/LIN to concentrator. Use Value: SNOOZE mode enables 10-second wake-up intervals with full ADC+CPU readiness - achieving 3.2 µA average system current. | Use Scenario: Oil-immersed transformer monitoring unit tracking temperature, partial discharge pulses, and load current over decades. IC Role / Device Role / Timing Role: Long-life embedded controller logging thermal profiles using independent VRTC and battery-backed RAM, with AES-secured data export via IrDA. Use Value: VRTC supply tolerance down to 1.6 V ensures 20-year RTC operation on a single CR2032 - eliminating periodic battery replacement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F10NMGDFB#50 | Same 80-pin LFQFP package, identical peripherals, but 256 KB flash and 16 KB RAM | Required for larger DLMS/COSEM implementations with extended tariff tables and firmware-over-the-air (FOTA) staging buffers | Select when future firmware growth headroom or dual-bank flash update capability is needed |
| R5F10NMJDFB#50 | Same package and memory (128 KB/8 KB), but adds PLL clock (32 MHz) and enables ΔΣ A/D operation at full speed | Necessary for high-sample-rate harmonic analysis (>3.2 kS/s) or real-time FFT computation in advanced meters | Choose when ΔΣ A/D must operate concurrently with 32 MHz CPU execution - not supported on R5F10NMEDFB#50 |
Compared with R5F10NMGDFB#50 and R5F10NMJDFB#50, the R5F10NMEDFB#50 delivers optimal balance of secure metrology features, ultra-low power consumption, and cost efficiency for standard AMI deployments - offering full AES, RTC, and ΔΣ ADC functionality without over-provisioned flash or PLL complexity.
Availability
R5F10NMEDFB#50 is available at Aetrix Electronics and suitable for smart electricity metering, prepayment energy systems, and grid-edge sensor nodes requiring stable component supply, long-term lifecycle support, and traceable sourcing for utility-grade certification.
Supply support for R5F10NMEDFB#50 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 applications.
The RL78/I1C product line targets secure, ultra-low-power smart metering applications - integrating metrology-grade analog front-ends, cryptographic acceleration, and independent RTC to meet IEC 62053 and DLMS/COSEM compliance requirements.
FAQ
What is the maximum operating frequency of the R5F10NMEDFB#50?
The R5F10NMEDFB#50 supports a maximum CPU clock of 24 MHz using the high-speed on-chip oscillator. It does not include the PLL clock option - that feature is exclusive to the R5F10NMJDFB#50 variant. The 24 MHz operation enables sub-42 ns instruction execution while maintaining ultra-low power consumption in HALT and STOP modes.
Does the R5F10NMEDFB#50 support hardware AES encryption?
Yes, the R5F10NMEDFB#50 includes a dedicated hardware AES engine supporting GCM, ECB, and CBC cipher modes with 128-, 192-, and 256-bit key lengths. This is confirmed in the datasheet's "AES circuit" note and functional matrix - enabling secure DLMS/COSEM communications and firmware authentication without software overhead.
How many channels does the ΔΣ A/D converter have on the R5F10NMEDFB#50?
The R5F10NMEDFB#50 integrates a 24-bit ΔΣ A/D converter with four input channels (ANIP0–ANIP3/ANIN0–ANIN3), as specified in the "Outline of Functions" table and block diagram for 80-pin devices. This matches the R5F10NMGDFB#50 and R5F10NMJDFB#50 variants - all three share identical ΔΣ ADC channel count and resolution.
What is the RTC backup voltage requirement for the R5F10NMEDFB#50?
The R5F10NMEDFB#50 requires a minimum 1.6 V on the VRTC pin to maintain RTC operation during main power loss, as documented in Note 1 of the datasheet. This allows use of standard CR2032 batteries (nominal 3.0 V, end-of-life ~2.0 V) with simple resistive dropper or LDO regulation - ensuring >10 years of timekeeping without external RTC IC.
Is the R5F10NMEDFB#50 pin-compatible with other RL78/I1C 80-pin variants?
Yes, the R5F10NMEDFB#50 shares identical 80-pin LFQFP mechanical dimensions, pad layout, and pinout with R5F10NMGDFB#50 and R5F10NMJDFB#50 - confirmed in Section 1.3.2 "80-pin products" pin configuration diagram. All three support the same VDD/EVDD0/VSS/EVSS0 power domains and peripheral pin mappings.
R5F10NMEDFB#50 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 80-LQFP
- Series:
- RL78/I1C
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- RL78
- Core Size:
- 16-Bit
- Speed:
- 24MHz
- Connectivity:
- CSI, I2C, IrDA, LINbus, UART/USART
- Peripherals:
- LCD, LVD, POR, PWM, WDT
- Number of I/O:
- 52
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 2K x 8
- RAM Size:
- 6K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.7V ~ 5.5V
- Data Converters:
- A/D 4x10b, 3x24b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F10NMEDFB#50 FAQ
1.How can I place an order for R5F10NMEDFB#50 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F10NMEDFB#50 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 R5F10NMEDFB#50 reliable?
The price and inventory of R5F10NMEDFB#50 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F10NMEDFB#50 is usually 5 days.
3.What payment methods are accepted for R5F10NMEDFB#50?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F10NMEDFB#50 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F10NMEDFB#50?
R5F10NMEDFB#50 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F10NMEDFB#50 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 R5F10NMEDFB#50?
For technical support, including R5F10NMEDFB#50 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F10NMEDFB#50 requirements.
6.How does Aetrix verify that R5F10NMEDFB#50 is sourced from the original manufacturer or authorized distributors?
All R5F10NMEDFB#50 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 R5F10NMEDFB#50 meets industry standards.
7.What is the process for return or replacement of R5F10NMEDFB#50?
All R5F10NMEDFB#50 units undergo pre-shipment inspection (PSI). If there is an issue with R5F10NMEDFB#50, 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 R5F10NMEDFB#50 part is unused and in its original packaging.
Return procedure for R5F10NMEDFB#50:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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