Renesas R5F523E6LDBS#20

Overview

R5F523E6LDBS#20 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 ±10-V input capability, rail-to-rail programmable gain instrumentation amplifier (gain = 1–128), on-chip excitation current sources (50–1000 µA), and a low-drift 2.5-V voltage reference (8 ppm/°C). Operating at up to 32 MHz, it delivers 64 DMIPS and supports IEC60730-compliant safety functions.

For engineers reviewing the R5F523E6LDBS#20 datasheet, R5F523E6LDBS#20 pinout, R5F523E6LDBS#20 application, or R5F523E6LDBS#20 equivalent, key selection criteria include its 100-pin TFBGA package (PTBG0100KD-A), 256-KB flash/32-KB SRAM/8-KB data flash memory configuration, dual A/D subsystems (24-bit DSAD + 12-bit S12AD), CAN 2.0B interface, and support for software standby with low-power timer operation.

Technical Context

The R5F523E6LDBS#20 implements a Harvard-architecture RXv2 CPU core with 5-stage pipeline, single-cycle instruction execution, and IEEE 754-compliant 32-bit FPU. Its analog subsystem centers on the DSADB module synchronized to PCLKC (≤16 MHz), featuring fourth- and fifth-order sinc digital filters, simultaneous 50/60 Hz rejection at 10/54 SPS, and hardware-assisted disconnect detection for HVAIN pins.

Digital integration includes ELC-driven event-triggered operation across MTU2a, DSAD, and R16DA modules-enabling CPU sleep during synchronized sensor acquisition and actuation. The MCU supports three low-power modes, with LPT running off sub-clock or IWDT oscillator during software standby, and includes MPU, DOC-based RAM self-test, and CAC for clock accuracy monitoring.

Key Specifications

Pinout & Package

Package: PTBG0100KD-A - 100-pin TFBGA, 5.5 × 5.5 mm body, 0.5 mm pitch, 58 general-purpose I/O pins (including 6 with 5-V tolerance), 1 dedicated input pin, and integrated power/ground distribution optimized for low-noise analog layout.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F523E6LDBS#20, R5F523E6LDFP#20 trades miniaturization for assembly simplicity and thermal margin, while R5F523E5LDBS#20 reduces memory capacity without altering analog precision or peripheral functionality-making both viable alternatives depending on mechanical, thermal, or cost constraints.

Availability

R5F523E6LDBS#20 is available at Aetrix Electronics and suitable for industrial weigh scales, smart pressure transmitters, high-accuracy temperature controllers, and energy metering sensor nodes requiring stable component supply and long-term lifecycle support.

Supply support for R5F523E6LDBS#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 IoT markets.

The RX23E-B Group targets high-precision industrial sensing applications, integrating metrology-grade analog peripherals with functional safety features to replace discrete signal chains in smart sensors and process instruments.

FAQ

What is the maximum sampling rate of the 24-bit delta-sigma ADC in R5F523E6LDBS#20?

The R5F523E6LDBS#20 supports a maximum sampling rate of 125 kSPS for its 24-bit delta-sigma ADC (DSADB) when operating with fMOD = 4 MHz. This rate is achievable in lower-resolution modes; at full 24-bit effective resolution (gain = 1), the usable rate drops to 3.8 SPS. The device offers programmable data rates from 3.8 SPS to 125 kSPS, selectable per channel via digital filter configuration.

Does R5F523E6LDBS#20 support simultaneous 50 Hz and 60 Hz noise rejection?

Yes, the R5F523E6LDBS#20 supports simultaneous 50 Hz and 60 Hz line-frequency rejection when configured for output data rates of 10 SPS or 54 SPS. This capability is implemented in hardware within the DSADB's sinc filter architecture and does not require firmware intervention-enabling robust operation in globally deployed industrial equipment subject to mixed AC power environments.

What are the voltage and temperature specifications for R5F523E6LDBS#20?

The R5F523E6LDBS#20 operates from a single 1.8-V to 5.5-V supply (VCC) and supports three voltage-dependent frequency grades: 8 MHz (1.8–2.4 V), 16 MHz (2.4–2.7 V), and 32 MHz (2.7–5.5 V). Its D-version rating guarantees operation from –40°C to +85°C ambient temperature. AVCC0 must be maintained between 4.5 V and 5.5 V for full DSAD performance, including ±10-V input range and 24-bit effective resolution.

Can R5F523E6LDBS#20 drive a liquid crystal display (LCD)?

Yes, the R5F523E6LDBS#20 includes an integrated LCD controller/driver (LCDC) supporting up to 40 segments × 4 commons or 36 segments × 8 commons. This capability is confirmed in Table 1.3 of the datasheet for the "L" variant (R5F523E6LDBS#20), which explicitly lists "Available" under the LCD column. The LCDC supports internal voltage boosting and external resistor division methods for contrast control.

What communication interfaces are integrated into R5F523E6LDBS#20?

The R5F523E6LDBS#20 integrates seven communication peripherals: six SCIg channels (asynchronous/clock-synchronous/smart card), one SCIh channel (LIN-compatible), one I2C bus interface (RIICa, up to 400 kbps), one RSPI channel (up to 16 Mbps), and one CAN 2.0B module (RSCAN, up to 1 Mbps). All are accessible in the 100-pin TFBGA package, with SCI0–SCI9 and RSCAN assigned to dedicated pins per Table 1.4.