Renesas R5F10NPJDFB#75

Overview

R5F10NPJDFB#75 from Renesas is a 100-pin, 256 KB flash, 16 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 requiring secure, ultra-low-power operation across –40°C to +85°C.

For engineers reviewing the R5F10NPJDFB#75 datasheet, R5F10NPJDFB#75 pinout, R5F10NPJDFB#75 application, or R5F10NPJDFB#75 equivalent, this page delivers verified specifications, package mapping, functional alternatives, and design-critical context for secure metering firmware development, low-voltage ADC calibration, and RTC-backed time-stamped energy logging.

Technical Context

The R5F10NPJDFB#75 implements the RL78 CPU core with CISC architecture, 3-stage pipeline, and selectable clock sources including 32 MHz PLL (enabling ΔΣ ADC operation), 24 MHz high-speed on-chip oscillator (±1.0% accuracy), and 15 kHz low-speed oscillator. It supports HALT, STOP, and SNOOZE low-power modes with VDD range 1.9–5.5 V.

It integrates dual A/D subsystems: a 24-bit ΔΣ converter (4 channels) with internal reference and temperature sensor, plus an 8/10-bit SAR converter (6 channels); LCD controller driving up to 42 segments/8 commons; and event-link controller (ELC) enabling hardware-triggered peripheral chaining without CPU intervention.

Key Specifications

Pinout & Package

100-pin plastic LFQFP (14 × 14 mm, 0.5 mm pitch), RoHS-compliant, tray packaging (Ver.1.1, #75 suffix). REGC requires 0.47–1 µF capacitor to VSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10NPGDFB#75 and R5F10NMJDFB#75, the R5F10NPJDFB#75 provides maximum on-chip memory and I/O count for future-proof AMI firmware, full peripheral redundancy, and highest integration density - making it optimal for next-generation three-phase smart meters with dual-band communication and advanced diagnostics.

Availability

R5F10NPJDFB#75 is available at Aetrix Electronics and suitable for electric AMI power meters, prepayment energy meters, and grid monitoring sensor nodes requiring stable component supply, long lifecycle assurance, and traceable sourcing for utility-certified designs.

Supply support for R5F10NPJDFB#75 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 infrastructure markets.

The RL78/I1C product line targets secure, ultra-low-power metering applications - integrating metrology-grade ADCs, hardware cryptography, and independent RTC to meet IEC 62056 and ANSI C12 compliance requirements.

FAQ

What is the maximum operating frequency and clock source configuration supported by the R5F10NPJDFB#75?

The R5F10NPJDFB#75 supports a maximum CPU clock of 32 MHz using its integrated PLL, which remains active even during 24-bit ΔΣ A/D conversion. It also offers a 24 MHz high-speed on-chip oscillator (±1.0% accuracy across –20°C to +85°C), a 32.768 kHz subclock for RTC, and a 15 kHz low-speed oscillator for ultra-low-power modes. The R5F10NPJDFB#75 allows dynamic clock switching between these sources without reset.

Does the R5F10NPJDFB#75 support hardware-accelerated AES encryption, and what modes are implemented?

Yes, the R5F10NPJDFB#75 includes a dedicated hardware AES engine supporting GCM, ECB, and CBC cipher modes with key lengths of 128, 192, and 256 bits. This accelerator operates independently of the CPU, enabling real-time encryption of meter data packets and secure firmware updates without compromising real-time metrology performance. The R5F10NPJDFB#75 is part of the R5F10N series, where AES is explicitly mounted per datasheet Table 1-1.

How does the independent power supply RTC in the R5F10NPJDFB#75 function during main power loss?

The R5F10NPJDFB#75 features a dedicated VRTC pin accepting 1.6–5.5 V, allowing the RTC to continue operating from a backup battery or supercapacitor while VDD is absent or below operational threshold. It retains calendar, alarm, and correction settings, outputs 1 Hz/64 Hz timing signals (RTCOUT), and accepts external time-capture events (RTCIC0–RTCIC2) - all critical for uninterrupted billing cycles and outage logging. The R5F10NPJDFB#75 guarantees RTC functionality down to 1.6 V VRTC.

What analog-to-digital capabilities does the R5F10NPJDFB#75 provide for precision metering applications?

The R5F10NPJDFB#75 integrates two complementary A/D systems: a 24-bit ΔΣ converter with 4 input channels, internal 1.45 V reference, temperature sensor, and AVRT/AVCM/AREGC support for high-accuracy current/voltage measurement; and a separate 8/10-bit SAR converter with 6 channels for auxiliary sensing or fast control loops. Both operate across the full 1.9–5.5 V VDD range, and the ΔΣ ADC remains functional under 32 MHz PLL clock - essential for Class 0.2 smart meter compliance. The R5F10NPJDFB#75 datasheet confirms 4-channel ΔΣ and 6-channel SAR configurations for 100-pin variants.

Is the R5F10NPJDFB#75 pin-compatible with other RL78/I1C family members, and what package does it use?

The R5F10NPJDFB#75 uses a 100-pin plastic LFQFP (14 × 14 mm, 0.5 mm pitch) package designated FB, with Ver.1.1 tray packaging indicated by the #75 suffix. It shares the same pinout as other 100-pin RL78/I1C devices (e.g., R5F10NPGDFB#75), though memory size and certain peripheral enablements differ. Pin functions are consistent across the 100-pin group, and peripheral I/O redirection (PIOR0) allows flexible remapping - but direct substitution requires verification of flash/RAM requirements and enabled peripherals. The R5F10NPJDFB#75 datasheet Figure 1-1 and Table 1-1 confirm FB package and 100-pin compatibility.