Renesas R5F2136CSNFA#X4

Overview

R5F2136CSNFA#X4 from Renesas is a 16-bit R8C CPU core microcontroller with 128 KB flash program ROM, 10 KB RAM, and 4 KB data flash (1 KB × 4 blocks) supporting background operation (BGO). It integrates a 28-channel electrostatic capacitive touch sensor control unit (TSCU), 10-bit × 12-channel A/D converter, hardware LIN module, UART0/UART2/SSU/I²C serial interfaces, and four independent timer units (RJ, RB2, RC, RE2) for PWM, capture/compare, and real-time clock functions - deployed in consumer appliance control panels requiring low-power, integrated touch and communication.

For engineers reviewing the R5F2136CSNFA#X4 datasheet, R5F2136CSNFA#X4 pinout, R5F2136CSNFA#X4 application, or R5F2136CSNFA#X4 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 selectable thresholds, and support for wait/stop low-power modes with sub-µA current draw.

Technical Context

The R5F2136CSNFA#X4 implements the R8C CPU core with 89 fundamental instructions, 1 Mbyte address space, and 16×16→32-bit multiplier with MAC capability. Its memory architecture separates program ROM (128 KB), data flash (4 KB BGO-capable), and RAM (10 KB), all accessible within a unified linear map.

Peripheral integration includes event link controller (ELC) enabling direct peripheral-to-peripheral triggering without CPU intervention, DTC for autonomous data transfers across 27 activation sources, and TSCU with system channel ×4 and dedicated touch I/O pins (CHxA0–CHxC, CH00–CH35) for self-capacitance sensing - all coordinated via shared SFR regions at 00000h–02FFFh and 06800h–06FFFh.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F2136ASDFA#X4 and R5F21368SDFA#X4, the R5F2136CSNFA#X4 provides maximum on-chip memory headroom for complex UI rendering, secure bootloader storage, and future firmware updates - critical for long-lifecycle consumer products requiring field-upgradable features.

Availability

R5F2136CSNFA#X4 is available at Aetrix Electronics and suitable for appliance control panels, industrial HMIs, audio remotes, and smart home sensor hubs requiring stable component supply, extended temperature operation, and integrated touch functionality.

Supply support for R5F2136CSNFA#X4 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/36T-A Group, including R5F2136CSNFA#X4, was designed for cost-effective, low-power embedded control in consumer electronics with integrated human-machine interface capabilities - emphasizing touch sensing, serial connectivity, and robust industrial temperature operation.

FAQ

What is the operating temperature range for the R5F2136CSNFA#X4?

The R5F2136CSNFA#X4 is the D-version part, rated for an operating ambient temperature range of -40°C to +85°C. This specification is confirmed in Table 1.2 of the R01DS0055EJ0100 datasheet and applies to all electrical characteristics unless otherwise noted. The R5F2136CSNFA#X4 meets industrial-grade thermal requirements without derating.

Does the R5F2136CSNFA#X4 support background operation for data flash writes?

Yes, the R5F2136CSNFA#X4 supports background operation (BGO) for its on-chip data flash (1 KB × 4 blocks). This allows program execution to continue uninterrupted while data flash is being erased or written - a key capability documented in Section 1.1 and Table 1.2 of the R01DS0055EJ0100 datasheet for firmware update resilience.

How many touch sensing channels does the R5F2136CSNFA#X4 provide?

The R5F2136CSNFA#X4 integrates a touch sensor control unit (TSCU) supporting 28 electrostatic capacitive touch channels, comprising CH00–CH08, CH10–CH11, CH16–CH25, CH27–CH28, CH31–CH35, and CHxA0–CHxC. This is explicitly stated in Section 1.1 and Table 1.2 of the R01DS0055EJ0100 datasheet.

What serial communication interfaces are integrated into the R5F2136CSNFA#X4?

The R5F2136CSNFA#X4 integrates UART0 (2 channels), UART2 (1 channel with I²C-bus mode), SSU_0/I²C_0 (1 shared channel), and a hardware LIN module (HW-LIN_0). UART2's I²C capability and SSU/I²C pin sharing are detailed in Table 1.2 and Figure 1.2 of the R01DS0055EJ0100 datasheet.

What is the package type and pin count of the R5F2136CSNFA#X4?

The R5F2136CSNFA#X4 uses a 64-pin LQFP package with code PLQP0064GA-A (0.8 mm pitch, 14 mm × 14 mm body). This is confirmed in Table 1.3 (Product List) and Section 1.2 of the R01DS0055EJ0100 datasheet, distinguishing it from the PLQP0064KB-A variant used in N/D versions with 0.5 mm pitch.