Renesas R5F523E6LGBS#20

Overview

R5F523E6LGBS#20 from Renesas is a 32-bit RXv2 microcontroller optimized for high-precision industrial sensing and control, featuring a 24-bit delta-sigma ADC with ±10-V input capability, 125 kSPS max sampling rate, 256 KB on-chip flash, 32 KB SRAM, and CAN interface - deployed in smart sensor nodes, programmable logic controllers, and energy metering systems.

For engineers reviewing the R5F523E6LGBS#20 datasheet, R5F523E6LGBS#20 pinout, R5F523E6LGBS#20 application, or R5F523E6LGBS#20 equivalent, this MCU delivers integrated analog front-end precision (11 nVRMS PGA noise, 4 nV/°C offset drift), IEEE 754 FPU, IEC60730 safety assist functions, and dual-voltage operation (1.8–5.5 V) for robust embedded measurement designs.

Technical Context

The R5F523E6LGBS#20 implements the RXv2 CPU core at up to 32 MHz (64 DMIPS), with Harvard architecture, 5-stage pipeline, and variable-length instructions. It integrates a dedicated analog subsystem including a rail-to-rail programmable gain instrumentation amplifier (gain = 1–128), excitation current sources (50–1000 µA), and voltage reference (2.5 V, 8 ppm/°C).

Its clock system supports main oscillator (1–20 MHz), sub-clock (32.768 kHz), PLL, and multiple on-chip oscillators - enabling synchronized peripheral clocks: PCLKC up to 16 MHz for DSAD, PCLKD up to 32 MHz for S12AD, and ICLK up to 32 MHz for CPU execution. The ELC enables event-triggered module operation without CPU intervention during sleep.

Key Specifications

Pinout & Package

Package: PTBG0100KD-A - 100-pin TFBGA, 5.5 mm × 5.5 mm, 0.5 mm pitch, 0.7 mm height, ball pitch compatible with fine-pitch PCB assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F523E6LGFP#20 and R5F523E5LGBS#20, the R5F523E6LGBS#20 offers the smallest form factor with maximum memory headroom for complex IEC60730 diagnostics, dual CAN firmware updates, and future feature expansion - making it optimal for space-constrained, safety-critical industrial modules.

Availability

R5F523E6LGBS#20 is available at Aetrix Electronics and suitable for industrial energy metering, smart load cell interfaces, and programmable logic controller analog input modules requiring stable component supply across extended temperature and long product lifecycles.

Supply support for R5F523E6LGBS#20 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 - including the R5F523E6LGBS#20 - was designed specifically for high-accuracy sensor signal acquisition in harsh environments, integrating metrology-grade analog front-ends with real-time control capabilities and functional safety features.

FAQ

What is the maximum sampling rate of the 24-bit delta-sigma ADC in R5F523E6LGBS#20?

The R5F523E6LGBS#20 supports a maximum sampling rate of 125 kSPS for its 24-bit delta-sigma ADC (DSADB) when operating with a 4 MHz modulator clock. This rate is achievable with lower-resolution digital filters (e.g., sinc⁴); higher-order filters reduce effective throughput to maintain noise performance - for example, sinc⁵ + sinc¹ yields 10 SPS with simultaneous 50/60 Hz rejection. The R5F523E6LGBS#20 maintains full 24-bit effective resolution at 3.8 SPS.

Does R5F523E6LGBS#20 support IEC60730 Class B compliance out of the box?

The R5F523E6LGBS#20 includes hardware-assisted self-test features required for IEC60730 Class B: A/D converter diagnostic, clock frequency accuracy measurement (CAC), independent watchdog timer (IWDT) test, RAM test via data operation circuit (DOC), and analog input disconnect detection. These are documented in the R01DS0402EJ0100 datasheet and require no external components - though full certification still depends on system-level implementation and software validation. The R5F523E6LGBS#20 is the foundation for certified designs.

What analog input voltage range does R5F523E6LGBS#20 support on its HVAIN pins?

The R5F523E6LGBS#20 supports a ±10-V differential input range on its HVAIN0–HVAIN3 pins, enabled by its integrated high-voltage analog front end. This allows direct connection to industrial sensors such as strain gauge bridges, isolated voltage outputs, and RTD signal conditioners without external level-shifting circuitry. The L-suffix in the part number explicitly denotes 10-V capability - confirmed in Table 1.3 of R01DS0402EJ0100.

Can R5F523E6LGBS#20 operate with a single 3.3-V supply across all domains?

The R5F523E6LGBS#20 supports 1.8–5.5 V on VCC, but its analog subsystem imposes stricter requirements: AVCC0 must be 4.5–5.5 V for full 12-bit ADC performance and ±10-V HVAIN operation. While core logic can run at 3.3 V, using 3.3 V on AVCC0 degrades S12AD accuracy and disables HVAIN functionality. The R5F523E6LGBS#20 requires dual-supply design - typically 3.3 V for digital and 5.0 V for analog domains - as specified in Section 1.1 of R01DS0402EJ0100.

Is the CAN interface in R5F523E6LGBS#20 compatible with ISO 11898-1 at 1 Mbps?

Yes, the RSCAN module in R5F523E6LGBS#20 is fully compliant with ISO 11898-1 for standard and extended frames, supporting bit rates up to 1 Mbps. It includes 16 message buffers, programmable acceptance filtering, and loopback/self-test modes. However, the R5F523E6LGBS#20 does not integrate a CAN physical layer transceiver - an external ISO 11898-2/3 compliant transceiver (e.g., TJA1042) is required for bus connection, as stated in Section 1.1 and Figure 1.2 of R01DS0402EJ0100.