Renesas R5F2135ACDFP#50

Overview

R5F2135ACDFP#50 from Renesas is a 16-bit R8C CPU core MCU with 96 KB flash program ROM, 8 KB data flash (4 × 1 KB blocks), and 8 KB RAM, operating at up to 20 MHz (V_CC = 2.7–5.5 V). It integrates UART0/1/2, I²C, SSU, LIN hardware module, 10-bit × 12-channel ADC, dual 8-bit DACs, six timer units (RA–RE + RD dual-channel), and voltage detection circuitry. It targets embedded control in consumer audio and office equipment.

For engineers reviewing the R5F2135ACDFP#50 datasheet, R5F2135ACDFP#50 pinout, R5F2135ACDFP#50 application, or R5F2135ACDFP#50 equivalent, key selection criteria include its -40°C to +85°C D-version temperature rating, background operation (BGO) for data flash, real-time clock (Timer RE), and hardware LIN support using Timer RA and UART0 - all confirmed in Rev 1.00 of R01DS0006EJ0100.

Technical Context

The R5F2135ACDFP#50 implements the R8C CPU core with 89 fundamental instructions, 16×16→32-bit multiplier, and multiply-accumulate capability. Its memory map spans 1 Mbyte (00000h–FFFFFh), with fixed interrupt vector table at 0FFDCh–0FFFFh and data flash at 03000h–03FFFh.

It supports four clock sources: XIN (up to 20 MHz crystal/resonator), XCIN (32 kHz crystal), high-speed on-chip oscillator (adjustable), and low-speed on-chip oscillator. Power modes include standard, wait (3.5 µA @ 3.0 V, f_XCIN = 32 kHz), and stop (2.0 µA @ 3.0 V), with oscillation stop detection and voltage monitor reset functions.

Key Specifications

Pinout & Package

Package: 52-pin LQFP (PLQP0052JA-A), 10 mm × 10 mm body, 0.65 mm pitch, surface-mount.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21358CDFP and R5F2135CCDFP, the R5F2135ACDFP#50 delivers optimal balance of code capacity (96 KB), data retention (8 KB data flash), and real-time responsiveness - making it ideal for mid-tier consumer appliances where feature richness and field upgradeability coexist under strict BOM constraints.

Availability

R5F2135ACDFP#50 is available at Aetrix Electronics and suitable for audio equipment control, office equipment motor drive, consumer appliance UI panels, and industrial sensor hub interfaces requiring stable component supply across extended product lifecycles.

Supply support for R5F2135ACDFP#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, power, and SoC solutions for automotive, industrial, and IoT markets.

The R8C/35C Group, including R5F2135ACDFP#50, was designed for cost-sensitive, low-power embedded control in consumer electronics - emphasizing integration of LIN, RTC, ADC/DAC, and robust flash endurance without external support components.

FAQ

What is the maximum operating frequency and voltage range for the R5F2135ACDFP#50?

The R5F2135ACDFP#50 operates at up to 20 MHz when supplied with 2.7–5.5 V, and supports reduced-frequency operation (5 MHz) down to 1.8 V. This dual-voltage/frequency capability allows flexible power management - high-speed execution during active tasks and lower-voltage, lower-frequency operation in standby states - while maintaining full peripheral functionality across the entire 1.8–5.5 V range.

Does the R5F2135ACDFP#50 support hardware LIN communication, and how is it implemented?

Yes, the R5F2135ACDFP#50 includes dedicated hardware LIN support using UART0 and Timer RA. The LIN module conforms to LIN 2.x specifications and handles break field detection, synchronization, checksum calculation, and frame timing autonomously. This offloads protocol handling from the CPU, ensuring deterministic latency and freeing up processing bandwidth for application logic - a key advantage over software-emulated LIN on general-purpose UARTs.

How many analog-to-digital converter channels does the R5F2135ACDFP#50 have, and what is their resolution?

The R5F2135ACDFP#50 features a single 10-bit successive-approximation ADC with 12 input channels (AN0–AN11). It includes sample-and-hold circuitry and supports sweep mode for automatic sequential conversion across selected channels. This provides sufficient precision for sensor interfacing (e.g., thermistors, potentiometers) and real-time control feedback in consumer and industrial applications without requiring external ADCs.

What is the purpose and capacity of the data flash in the R5F2135ACDFP#50?

The R5F2135ACDFP#50 contains 4 KB of data flash organized as four 1 KB blocks, rated for 10,000 erase/write cycles. It supports background operation (BGO), allowing firmware to read/execute from program ROM while simultaneously reprogramming data flash - essential for storing calibration data, device configuration, or field-upgradable parameters without interrupting real-time operation.

Is the R5F2135ACDFP#50 pin-compatible with other members of the R8C/35C Group, and what package does it use?

Yes, the R5F2135ACDFP#50 uses the PLQP0052JA-A 52-pin LQFP package and shares identical pinout and peripheral mapping with all R8C/35C Group variants (e.g., R5F21354CDFP through R5F2135CCDFP). This enables direct hardware compatibility across memory-size variants - simplifying design reuse, reducing layout iterations, and supporting scalable firmware development within the same PCB footprint.