Renesas R5F21292SDSP#U0

Overview

R5F21292SDSP#U0 from Renesas Electronics is a 16-bit R8C/29 Group single-chip microcontroller with 8 KB program flash, 1 KB × 2 data flash, and 512 bytes RAM, operating at up to 20 MHz (V_CC = 3.0–5.5 V). It integrates a 10-bit 4-channel ADC, UART0/UART1, I²C bus interface, hardware LIN module, RTC-capable Timer RE, and operates across −40°C to +85°C. It targets embedded control in industrial sensors and appliance motor management.

For engineers reviewing the R5F21292SDSP#U0 datasheet, R5F21292SDSP#U0 pinout, R5F21292SDSP#U0 application, or R5F21292SDSP#U0 equivalent, key selection factors include its D-version industrial temperature rating, dual 1 KB data flash blocks for EEPROM emulation, 20-pin LSSOP package with XCIN/XCOUT support, and hardware LIN compliance via Timer RA + UART0.

Technical Context

The R5F21292SDSP#U0 implements the R8C CPU core with 89 fundamental instructions and executes at 50 ns minimum cycle time (20 MHz XIN clock). Its memory architecture separates 8 KB program ROM (0C000h–0FFFFh) from two independent 1 KB data flash blocks used for nonvolatile parameter storage without external EEPROM.

Peripheral integration includes a dedicated hardware LIN transceiver function routed through Timer RA and UART0, real-time clock capability in Timer RE (D-version enabled), and dual clock sources: high-speed on-chip oscillator (adjustable) plus external XIN/XCIN (32 kHz) for low-power timing - all managed via three on-chip clock generation circuits.

Key Specifications

Pinout & Package

20-pin molded-plastic LSSOP (PLSP0020JB-A), 7.6 mm × 4.4 mm body, 0.65 mm lead pitch, exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit microcontroller applications.

Compared with R5F21294SDSP, R5F21292SDSP#U0 trades flash capacity for lower unit cost while retaining identical data flash endurance and LIN/RTC functionality; versus R5F21282SDSP, it adds 10,000-cycle data flash essential for robust field parameter updates without compromising program memory lifetime.

Availability

R5F21292SDSP#U0 is available at Aetrix Electronics and suitable for industrial sensor nodes, home appliance motor controllers, and automotive body modules requiring stable component supply across extended production lifecycles.

Supply support for R5F21292SDSP#U0 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 Corporation is a global semiconductor leader specializing in microcontrollers, analog, and power solutions for industrial, automotive, and IoT applications.

The R8C/29 Group, including R5F21292SDSP#U0, was designed for cost-sensitive, low-power embedded control in appliances, sensors, and body electronics - emphasizing integrated data flash, LIN compliance, and industrial-grade reliability.

FAQ

What is the maximum operating frequency and supply voltage range for R5F21292SDSP#U0?

R5F21292SDSP#U0 operates at up to 20 MHz with a supply voltage range of 3.0 V to 5.5 V. This specification applies to the D-version (−40°C to +85°C), and minimum instruction execution time is 50 ns under these conditions. The device also supports reduced-frequency modes down to 5 MHz at 2.2 V for ultra-low-power applications.

Does R5F21292SDSP#U0 include hardware LIN functionality, and how is it implemented?

Yes, R5F21292SDSP#U0 includes hardware LIN support implemented through tight coupling between Timer RA and UART0. This enables automatic LIN header detection, checksum calculation, and timing-critical bit sampling without CPU intervention - meeting LIN 2.1 physical layer requirements for slave-node operation in automotive body networks.

How many data flash blocks does R5F21292SDSP#U0 have, and what is their endurance?

R5F21292SDSP#U0 contains two independent 1 KB data flash blocks, each rated for 10,000 program/erase cycles. These blocks are mapped separately in memory space and support byte-level writes and sector erases, enabling robust EEPROM emulation for calibration data, device configuration, and usage counters.

Is the real-time clock (RTC) functional in R5F21292SDSP#U0, and what clock source does it use?

Yes, the RTC function in R5F21292SDSP#U0 is fully operational in the D-version and uses the 32 kHz XCIN/XCOUT circuit. Timer RE provides calendar timekeeping with alarm and compare-match interrupt capability, and the 32 kHz crystal input ensures ±20 ppm accuracy over the −40°C to +85°C range.

What package type and pin count does R5F21292SDSP#U0 use, and is it RoHS compliant?

R5F21292SDSP#U0 uses a 20-pin LSSOP package (PLSP0020JB-A) with 0.65 mm lead pitch. Per Renesas documentation, it complies with EU RoHS Directive requirements, containing no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits.