Renesas R5F10NMJDFB#50

Overview

R5F10NMJDFB#50 from Renesas is an RL78/I1C 80-pin ultra-low-power 16-bit MCU with 256 KB flash, 16 KB RAM, hardware AES-128/192/256, independent RTC powered by VRTC, and integrated 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 R5F10NMJDFB#50 datasheet, R5F10NMJDFB#50 pinout, R5F10NMJDFB#50 application, or R5F10NMJDFB#50 equivalent, key selection criteria include its 80-pin LFQFP package, industrial-grade -40°C to +85°C operation, dual-voltage domain (VDD/EVDD0, VRTC), and support for background data flash rewriting during program execution.

Technical Context

The R5F10NMJDFB#50 implements the RL78 CPU core with CISC architecture, 3-stage pipeline, and selectable clock sources including PLL (32 MHz), high-speed on-chip oscillator (up to 24 MHz ±1.0%), and low-speed on-chip oscillator (15 kHz). It integrates a dedicated 24-bit ΔΣ A/D converter with four channels and internal reference (1.45 V), plus a separate 10-bit SAR ADC with six channels.

Its peripheral set includes UART0–2 (LIN-capable), simplified I²C (3 channels), CSI (3 channels), 8-channel 16-bit timer array, independent power supply RTC with calendar/alarm/correction, LCD controller supporting up to 34 segments and 8 commons, and Event Link Controller (ELC) enabling hardware-triggered peripheral chaining without CPU intervention.

Key Specifications

Pinout & Package

80-pin plastic LFQFP (12 × 12 mm, 0.5 mm pitch) with exposed pad not specified; REGC requires 0.47–1 µF capacitor to VSS per datasheet caution.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with R5F10NMGDFB#50, the R5F10NMJDFB#50 adds hardware AES for secure firmware and data handling; compared with R5F10NPJDFB#50, it trades two extra serial interfaces and 12 additional pins for identical core performance in a smaller, lower-cost 80-pin footprint.

Availability

R5F10NMJDFB#50 is available at Aetrix Electronics and suitable for smart electricity meter, AMI endpoint, and prepayment energy meter designs requiring stable component supply, long-term lifecycle support, and industrial temperature reliability.

Supply support for R5F10NMJDFB#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 is a global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and IoT markets.

The RL78/I1C product line targets electric utility metering applications, integrating metrology-grade analog peripherals, ultra-low-power operation, and hardware security features to meet international standards like IEC 62053 and DLMS/COSEM.

FAQ

What is the maximum operating frequency of the R5F10NMJDFB#50?

The R5F10NMJDFB#50 supports a maximum CPU clock frequency of 32 MHz via its integrated PLL. This is confirmed in the datasheet's "PLL clock" section (Note 2), where 32 MHz is explicitly selectable for the R5F10NMJ variant. The high-speed on-chip oscillator also supports up to 24 MHz with ±1.0% accuracy across the full industrial temperature range.

Does the R5F10NMJDFB#50 include hardware AES acceleration?

Yes, the R5F10NMJDFB#50 includes a dedicated hardware AES circuit supporting GCM, ECB, and CBC cipher modes with 128-, 192-, and 256-bit key lengths. This feature is explicitly documented in the datasheet's "AES circuit" section and confirmed in Table 1-1 and the "ROM, RAM capacities" table, which marks AES as "Mounted" for R5F10NMJ devices.

What is the ADC configuration of the R5F10NMJDFB#50?

The R5F10NMJDFB#50 integrates two independent ADC systems: a 24-bit ΔΣ A/D converter with four input channels (ANIP0–ANIP3/ANIN0–ANIN3) and a 10-bit SAR A/D converter with six channels (ANI0–ANI5). Both share internal reference (1.45 V) and temperature sensor, and operate across the full 1.9–5.5 V VDD range per datasheet Section 1.1.

What package and pin count does the R5F10NMJDFB#50 use?

The R5F10NMJDFB#50 uses an 80-pin plastic LFQFP package (12 × 12 mm, 0.5 mm pitch), designated by "M" in the part number and confirmed in Table 1-1 and Figure 1-1. Pin configuration details, including function multiplexing and LCD segment assignments, are provided in Section 1.3.2 of the datasheet.

Is the R5F10NMJDFB#50 qualified for industrial temperature operation?

Yes, the R5F10NMJDFB#50 is rated for industrial temperature operation from –40°C to +85°C, indicated by the "D" suffix in the part number per Figure 1-1. This rating applies to all electrical specifications including flash endurance, ADC accuracy, and oscillator stability, as verified in the "Operating ambient temperature" section of the datasheet.