Renesas R5F21368SNFA#30

Overview

R5F21368SNFA#30 from Renesas is a 16-bit R8C CPU core microcontroller with 64 KB flash program ROM, 6 KB RAM, and 4 KB data flash (1 KB × 4 blocks) supporting background operation (BGO). It delivers 20 MHz CPU performance at 2.7–5.5 V, integrates a 10-bit 12-channel ADC, electrostatic capacitive touch sensor control unit (28 channels), hardware LIN module, and dual UART + I²C/SSU serial interfaces - deployed in consumer appliance control subsystems requiring low EMI and robust capacitive sensing.

For engineers reviewing the R5F21368SNFA#30 datasheet, R5F21368SNFA#30 pinout, R5F21368SNFA#30 application, or R5F21368SNFA#30 equivalent, key selection criteria include its 64-pin LQFP package (PLQP0064GA-A), -40°C to +85°C industrial temperature grade (D version), on-chip voltage detection with three thresholds, and integrated touch sensor control unit enabling self-capacitance measurement without external components.

Technical Context

The R5F21368SNFA#30 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 program ROM allocated across 08000h–17FFFh and data flash at 07000h–07FFFh.

Peripheral integration includes Timer RJ_0 (16-bit periodic/pulse output), Timer RB2_0 (16-bit PWM/one-shot), Timer RC_0 (16-bit with 4 capture/compare registers, 3-pin PWM), and Timer RE2 (8-bit real-time clock mode). The event link controller (ELC) supports 30 sources × 10 event link operations, decoupling peripheral triggering from interrupt latency.

Key Specifications

Pinout & Package

Package: 64-pin LQFP (PLQP0064GA-A), 0.8 mm pitch, 14 mm × 14 mm body, exposed pad not specified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21368SNFA#30, R5F21368SDFP#30 offers identical functionality in a space-saving 10 × 10 mm LQFP, while R5F2136ASNFA#30 provides 32 KB more program ROM for complex control algorithms - both retain full peripheral compatibility and require no software modification.

Availability

R5F21368SNFA#30 is available at Aetrix Electronics and suitable for home appliance control panels, industrial HMIs, and audio equipment interfaces requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for R5F21368SNFA#30 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 automotive, industrial, and IoT markets.

The R8C/36T-A Group targets cost-sensitive, EMI-robust embedded control applications - particularly where capacitive touch sensing, LIN communication, and low-power operation are critical design requirements.

FAQ

What is the operating temperature range for R5F21368SNFA#30?

The R5F21368SNFA#30 is the D-version part, rated for −40°C to +85°C ambient operating temperature. This industrial-grade specification ensures reliable operation in demanding environments such as HVAC systems or outdoor consumer appliances, unlike the N-version (−20°C to +85°C) used in commercial applications. The datasheet confirms this rating in Table 1.2 and Figure 1.1.

Does R5F21368SNFA#30 support in-circuit debugging?

Yes, R5F21368SNFA#30 includes on-chip debug functionality accessible via the single-wire debug interface. It supports breakpoints, watchpoints, and real-time variable monitoring without requiring external debug hardware beyond a standard Renesas E1/E20 emulator. Debug features are documented in Section 1.1 and confirmed in the "Debug functions" bullet under Flash memory specifications.

How many touch channels does the TSCU in R5F21368SNFA#30 support?

The touch sensor control unit (TSCU) in R5F21368SNFA#30 supports 28 electrostatic capacitive touch detection channels, mapped across dedicated pins including CHxA0, CHxA1, CHxB, CHxC, and CH00–CH08, CH10, CH11, CH16–CH25, CH27, CH28, and CH31–CH35. This is explicitly stated in Table 1.2 and verified in the Pin Functions section (Table 1.8).

Can R5F21368SNFA#30 operate from a 1.8 V supply?

Yes, R5F21368SNFA#30 supports 1.8 V to 5.5 V operation, but at reduced frequency: maximum 5 MHz CPU clock when VCC = 1.8 V–5.5 V. At 1.8 V, it maintains full peripheral functionality including ADC, timers, and serial interfaces - confirmed in Table 1.2 under "Operating frequency / Power supply voltage" and validated by the "CPU clock = 5 MHz (VCC = 1.8 V to 5.5 V)" specification.

Is R5F21368SNFA#30 pin-compatible with other R8C/36T-A Group MCUs?

Yes, all R8C/36T-A Group devices in the PLQP0064GA-A package - including R5F21368SNFA#30, R5F2136ASNFA#30, and R5F2136CSNFA#30 - share identical pinouts and electrical characteristics. Differences are limited to internal memory size (64/96/128 KB ROM) and RAM capacity (6/8/10 KB), with no impact on PCB layout or signal routing.