Renesas R5F10NLEDFB#50

Overview

R5F10NLEDFB#50 from Renesas is a 64-pin, 64 KB flash, 6 KB RAM RL78/I1C microcontroller with hardware AES encryption, independent-power-supply RTC, and 24-bit ΔΣ A/D converter - designed for electric AMI power meter applications operating from 1.9 V to 5.5 V across –40°C to +85°C.

For engineers reviewing the R5F10NLEDFB#50 datasheet, R5F10NLEDFB#50 pinout, R5F10NLEDFB#50 application, or R5F10NLEDFB#50 equivalent, this page delivers verified technical context, real-world use cases, pin-level circuit roles, and validated alternative options for secure, low-power metering designs.

Technical Context

The R5F10NLEDFB#50 implements the RL78 CPU core with CISC architecture, 3-stage pipeline, and selectable minimum instruction execution time (0.03125 µs at 32 MHz PLL clock). It integrates a 24-bit ΔΣ A/D converter (4 channels), 10-bit SAR A/D converter (4 channels), and independent RTC powered by VRTC with calendar, alarm, and correction functions.

It supports ultra-low-power operation via HALT, STOP, and SNOOZE modes, features on-chip voltage detectors for VDD, VBAT, VRTC, and EXLVD, and includes a data flash memory (2 KB) supporting background operation and 1,000,000 rewrite cycles at 1.9–5.5 V.

Key Specifications

Pinout & Package

Package: 64-pin plastic LFQFP (10 × 10 mm, 0.5 mm pitch), industrial grade (TA = –40°C to +85°C), embossed tape packaging (#50).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10NLEDFB#50, R5F10NLGDFB#50 offers scalable firmware capacity within identical footprint and power profile, while R5F11TLEDFB#50 trades hardware security for lower unit cost - requiring careful evaluation of system-level encryption requirements and performance impact.

Availability

R5F10NLEDFB#50 is available at Aetrix Electronics and suitable for electric AMI power meters, prepayment metering systems, and grid-edge monitoring nodes requiring stable component supply, long-term lifecycle support, and industrial-grade reliability.

Supply support for R5F10NLEDFB#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, and power solutions for industrial, automotive, and IoT applications.

The RL78/I1C product line targets secure, ultra-low-power metering applications - integrating metrology-grade ADCs, independent RTC, hardware crypto, and robust peripheral sets optimized for electric utility infrastructure.

FAQ

What is the maximum operating frequency of the R5F10NLEDFB#50?

The R5F10NLEDFB#50 supports a maximum CPU clock frequency of 32 MHz via its integrated PLL. This is confirmed in the datasheet's "PLL clock" section, where 32 MHz is explicitly selectable and enables ΔΣ A/D converter operation concurrently with CPU execution. The high-speed on-chip oscillator also supports up to 24 MHz for applications requiring lower jitter or avoiding crystal components.

Does the R5F10NLEDFB#50 include hardware AES acceleration?

Yes, the R5F10NLEDFB#50 includes a dedicated hardware AES circuit supporting GCM, ECB, and CBC cipher modes with 128-, 192-, and 256-bit key lengths. This is explicitly stated in the datasheet's "AES circuit" section and confirmed by the part number decoding: "10N" denotes on-chip AES, distinguishing it from "11T" variants like R5F11TLEDFB#50 which omit this feature.

What is the pin count and package type of the R5F10NLEDFB#50?

The R5F10NLEDFB#50 uses a 64-pin plastic LFQFP package measuring 10 × 10 mm with 0.5 mm pitch. This is unambiguously defined in the "List of Part Numbers" section of the datasheet, where "L" in the part number denotes 64-pin configuration and "FB" specifies the LFQFP package. Pin configuration diagrams for 64-pin products are provided on pages 6–7.

How much flash and RAM does the R5F10NLEDFB#50 provide?

The R5F10NLEDFB#50 integrates 64 KB of code flash memory and 2 KB of data flash memory, along with 6 KB of on-chip RAM. These values are directly specified in Table 1-1 ("List of Ordering Part Numbers") and confirmed in Section 1.6 ("Outline of Functions"), where "R5F10NLEDFB" is mapped to 64 KB flash and 6 KB RAM for 64-pin variants.

What ADC capabilities does the R5F10NLEDFB#50 offer for metering applications?

The R5F10NLEDFB#50 provides two complementary ADC systems: a 24-bit ΔΣ A/D converter with 4 input channels (ANIP0–ANIP3/ANIN0–ANIN3) optimized for high-precision metrology, and a separate 10-bit SAR A/D converter with 4 channels (ANI0–ANI3) for auxiliary sensing. Both operate across the full 1.9–5.5 V supply range and include internal reference voltage (1.45 V) and temperature sensor support.