Renesas R5F523E6NDFN#50

Overview

R5F523E6NDFN#50 from Renesas is a 32-bit RXv2 microcontroller optimized for high-precision analog measurement in industrial sensing applications. It integrates a 24-bit delta-sigma ADC with 31.25 kSPS max sampling rate, ±5-V analog input range, rail-to-rail programmable gain instrumentation amplifier (gain = 1–128), on-chip excitation current sources (50–1000 µA), and 256 KB flash/32 KB SRAM - all operating at up to 32 MHz.

For engineers reviewing the R5F523E6NDFN#50 datasheet, R5F523E6NDFN#50 pinout, R5F523E6NDFN#50 application, or R5F523E6NDFN#50 equivalent, key selection criteria include its 80-pin LFQFP package, 31.25 kSPS delta-sigma ADC performance, integrated ±5-V HVAIN analog front end, CAN 2.0B interface, and IEC60730 safety support for Class B compliance.

Technical Context

The R5F523E6NDFN#50 implements the RXv2 CPU core with IEEE 754-compliant 32-bit FPU, memory protection unit (MPU), and event link controller (ELC) enabling interrupt-free peripheral coordination during CPU sleep. Its analog subsystem centers on the DSADB module synchronized to PCLKC (≤16 MHz), with fourth- and fifth-order sinc filters, simultaneous 50/60 Hz rejection at 10/54 SPS, and offset/gain error calibration.

Digital integration includes one CAN channel (ISO 11898-1, up to 1 Mbps), six SCIg interfaces (asynchronous/clock-sync/smart card), one RIIC (I²C/SMBus), one RSPI (up to 16 Mbps), and four-channel DMAC - all coordinated via ELC-triggered background operation without CPU intervention.

Key Specifications

Pinout & Package

Package: 80-pin Low-Profile Quad Flat Package (LFQFP), PLQP0080KB-B, 12 × 12 mm body, 0.5 mm pitch, exposed pad (thermal enhancement), RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-precision analog microcontroller applications.

Compared with R5F523E6JDFN#50, R5F523E6NDFN#50 removes unused LCD hardware to reduce power and cost; compared with R5F523E5NDFN#50, it doubles flash and RAM for complex calibration algorithms, secure boot, or dual-bank OTA updates - critical for field-deployed industrial devices.

Availability

R5F523E6NDFN#50 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart transmitters, and energy metering systems requiring stable component supply, long-term lifecycle assurance, and guaranteed -40°C to +85°C operation.

Supply support for R5F523E6NDFN#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 infrastructure markets.

The RX23E-B Group targets high-accuracy industrial sensing applications, integrating precision analog front ends with robust MCU peripherals and functional safety features to replace discrete signal chains in smart sensor and transmitter designs.

FAQ

What is the maximum sampling rate of the 24-bit delta-sigma ADC in R5F523E6NDFN#50?

The R5F523E6NDFN#50 supports a maximum delta-sigma ADC sampling rate of 31.25 kSPS. This rate is achieved with the modulator clock set to 4 MHz and appropriate sinc filter configuration. At lower data rates (e.g., 10 or 54 SPS), the device provides simultaneous 50 Hz and 60 Hz line-frequency rejection - a key capability for industrial noise immunity. The R5F523E6NDFN#50 does not support the 125 kSPS mode found in 'L'/'K'-suffixed variants.

Does R5F523E6NDFN#50 include an integrated LCD controller?

No, R5F523E6NDFN#50 does not include an LCD controller. The 'N' in the part number explicitly denotes the absence of LCD driver functionality (per Figure 1.1 in R01DS0402EJ0100). This distinguishes it from the 'J' variant (e.g., R5F523E6JDFN#50), which integrates a 40×4 segment LCD controller. Removing the LCD block reduces power consumption, die size, and software overhead - making R5F523E6NDFN#50 optimal for headless sensor applications.

What analog input voltage range does R5F523E6NDFN#50 support on its HVAIN pins?

The R5F523E6NDFN#50 supports a ±5-V analog input range on its HVAIN0–HVAIN3 pins. This is confirmed by Table 1.3 (List of Products), where R5F523E6NDFN#50 is specified with "5 V" under "Analog Input Range (max.)". The device also includes integrated voltage fault detectors and disconnect assist for these pins, enabling robust operation in industrial environments with potential overvoltage transients.

Which communication interfaces are available on R5F523E6NDFN#50 for industrial networking?

R5F523E6NDFN#50 includes one CAN 2.0B channel (ISO 11898-1, up to 1 Mbps), six SCIg channels (supporting asynchronous, clock-synchronous, and smart card modes), one I²C bus interface (RIICa, up to 400 kbps), and one RSPI channel (up to 16 Mbps). These interfaces enable connectivity to fieldbus networks, sensor ICs, displays, and host controllers - with CAN being the primary choice for deterministic industrial control networks.

Is R5F523E6NDFN#50 qualified for IEC60730 Class B compliance?

Yes, R5F523E6NDFN#50 includes hardware-assisted self-diagnostic features required for IEC60730 Class B compliance, including ADC self-test, clock frequency accuracy measurement (CAC), independent watchdog timer (IWDT) diagnostics, RAM test assistance via the data operation circuit (DOC), and analog input disconnect detection. These capabilities are documented in the "Useful functions for IEC60730 compliance" section of the datasheet and are active in the D-version temperature grade.