Renesas R5F523E6BDNF#40

Overview

R5F523E6BDNF#40 from Renesas is a 32-bit RXv2 microcontroller optimized for high-precision analog measurement in industrial sensor nodes and metering systems. It integrates a 24-bit delta-sigma ADC with 125 kSPS max sampling rate, ±5-V 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 on a single 1.8–5.5 V supply.

For engineers reviewing the R5F523E6BDNF#40 datasheet, R5F523E6BDNF#40 pinout, R5F523E6BDNF#40 application, or R5F523E6BDNF#40 equivalent, key selection criteria include its 40-pin HWQFN package, absence of LCD driver, D-version temperature grade (–40°C to +85°C), and support for IEC60730-compliant self-diagnostic functions in safety-critical analog front-end designs.

Technical Context

The R5F523E6BDNF#40 implements the RXv2 CPU core with IEEE 754-compliant 32-bit FPU, 5-stage CISC Harvard pipeline, and memory protection unit - enabling deterministic real-time control alongside high-resolution sensor data acquisition. Its analog subsystem centers on the DSADB module, synchronized to PCLKC (up to 16 MHz), with configurable sinc filters, simultaneous 50/60 Hz rejection, and hardware-assisted disconnect detection for HVAIN inputs.

Digital integration includes one CAN 2.0B channel (1 Mbps), six SCIg interfaces (asynchronous/clock-sync/smart card), one RIIC (400 kbps), one RSPI (16 Mbps), and ELC-driven event-triggered operation - allowing peripheral coordination without CPU wake-up. Power management supports three low-power modes, LPT operation during software standby, and voltage monitoring across three independent LVD circuits.

Key Specifications

Pinout & Package

PWQN0040KD-A is a 40-pin HWQFN (6 × 6 mm, 0.5 mm pitch) with exposed thermal pad, rated for –40°C to +85°C operation. Pin functions are defined per Table 1.4–1.6 of R01DS0402EJ0100 Rev.1.00, supporting 13 I/O pins (5-V tolerant), 14 pull-up resistors, 13 open-drain outputs, and dedicated HVAIN/HVCOM analog input pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F523E6KDNF#40, the R5F523E6BDNF#40 trades ±10-V input support for lower system cost and simpler signal chain design when ±5-V sensors dominate; versus R5F523E5BDNF#40, it provides 128 KB additional flash and 16 KB more SRAM for complex metrology algorithms and data buffering - critical for extended waveform capture and edge analytics.

Availability

R5F523E6BDNF#40 is available at Aetrix Electronics and suitable for industrial flow meters, smart electricity meters, condition monitoring nodes, and PLC analog I/O modules requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for safety-certified designs.

Supply support for R5F523E6BDNF#40 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 sensor signal conditioning and metrology applications, integrating precision analog front ends with real-time MCUs to eliminate external signal chain components and accelerate time-to-certification for IEC60730 and IEC61000-4 compliance.

FAQ

What is the maximum sampling rate of the 24-bit delta-sigma ADC in R5F523E6BDNF#40?

The R5F523E6BDNF#40 supports a maximum sampling rate of 125 kSPS for its 24-bit delta-sigma ADC (DSADB) when configured with appropriate digital filter settings and modulator clock (fMOD = 4 MHz). This rate is achievable with reduced effective resolution; at 3.8 SPS, it delivers 24-bit effective resolution. The device also supports lower rates such as 31.25 kSPS for enhanced noise rejection in specific filter modes.

Does R5F523E6BDNF#40 include an LCD controller/driver?

No, the R5F523E6BDNF#40 does not include an LCD controller/driver. Per Renesas' part numbering convention (Figure 1.1), the "B" suffix indicates the absence of LCD functionality. This distinguishes it from variants like R5F523E6JDFN ("J" = LCD included) and optimizes die size and cost for applications where display output is handled externally or not required.

What analog input voltage range is supported by R5F523E6BDNF#40?

The R5F523E6BDNF#40 supports a ±5-V analog input range on its HVAIN pins, as confirmed by Table 1.3 (List of Products) and Figure 1.1 (part number decoding). It does not support the ±10-V range - that capability is reserved for "K" and "L" suffix variants (e.g., R5F523E6KDNF#40). The ±5-V range is designed for direct connection to standard industrial transmitters and bridge sensors.

Which communication interfaces are available on R5F523E6BDNF#40?

The R5F523E6BDNF#40 includes one CAN 2.0B channel (1 Mbps), six SCIg channels (asynchronous/clock-sync/smart card), one RIIC interface (400 kbps, SMBus compatible), one RSPI channel (16 Mbps), and one SCIh channel supporting LIN protocol. These interfaces are fully operational in the 40-pin HWQFN package, with pin assignments detailed in Table 1.4 of the datasheet R01DS0402EJ0100.

What is the operating temperature range for R5F523E6BDNF#40?

The R5F523E6BDNF#40 is a D-version device rated for an operating ambient temperature range of –40°C to +85°C, as specified in Table 1.3 and Figure 1.1 of the datasheet. This grade is intended for industrial equipment deployed in controlled indoor or sheltered outdoor environments, distinguishing it from G-version parts rated to +105°C for under-hood or high-ambient applications.