Renesas R5F11CBCMNA#U0

Overview

R5F11CBCMNA#U0 from Renesas Electronics is a 32-pin, 32 KB flash RL78/I1E microcontroller optimized for industrial sensor signal conditioning and low-power embedded control. It integrates a 24-bit ΔΣ A/D converter (SNDR: 85 dB), programmable gain instrumentation amplifier (x1–x64), 3-channel configurable op-amp, 12-bit DAC, and real-time clock - all operating across −40°C to +125°C. It targets high-accuracy analog front-end applications such as industrial pressure transmitters and smart temperature sensors.

For engineers reviewing the R5F11CBCMNA#U0 datasheet, R5F11CBCMNA#U0 pinout, R5F11CBCMNA#U0 application, or R5F11CBCMNA#U0 equivalent, key selection considerations include its HVQFN-32 package, M-grade extended temperature support, integrated AFE with SBIAS bias output, and dual UART/LIN capability for sensor node communication and diagnostics.

Technical Context

The R5F11CBCMNA#U0 implements the RL78 CPU core with CISC architecture, 3-stage pipeline, and support for multiply/divide/accumulate instructions. Its analog subsystem centers on a 24-bit second-order ΔΣ A/D converter with programmable gain instrumentation amplifier inputs (3 differential/single-ended channels), background operation during data flash rewrite, and offset calibration via integrated 12-bit DAC.

Timing is managed by a flexible clock system: high-speed on-chip oscillator (1–24 MHz, ±3.0% accuracy at −40°C to +125°C), PLL (up to 32 MHz), and external crystal input (1–20 MHz). Power management includes HALT, STOP, and SNOOZE modes, with on-chip POR, LVD (7-level selectable), and voltage regulator circuitry for analog domain stability (REGA, REGC, SBIAS).

Key Specifications

Pinout & Package

32-pin plastic HVQFN (5 × 5 mm, 0.5 mm pitch) with exposed die pad (recommended connection to VSS). Pin functions validated per Renesas R01DS0274EJ0130 datasheet, Page 4 (top view).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller-with-integrated-ΔΣ-ADC applications.

Compared with R5F11CBCMNA#U0, the R5F11CCCMBG#U0 offers greater analog I/O scalability in a smaller footprint, while the ADUCM360BCPZ trades integrated AFE simplicity for ARM toolchain flexibility - making R5F11CBCMNA#U0 optimal for cost-sensitive, high-volume industrial sensor designs demanding minimal external components.

Availability

R5F11CBCMNA#U0 is available at Aetrix Electronics and suitable for industrial pressure transmitters, smart temperature sensor nodes, PLC analog input modules, and flow meter signal processors requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F11CBCMNA#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 is a global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and infrastructure markets.

The RL78/I1E product line is designed specifically for high-precision analog-intensive embedded applications - integrating advanced AFE peripherals, ultra-low-power operation, and industrial-grade reliability into compact MCUs.

FAQ

What is the maximum operating frequency of the R5F11CBCMNA#U0 at −40°C to +125°C?

The R5F11CBCMNA#U0 supports a maximum high-speed on-chip oscillator frequency of 24 MHz across its full industrial temperature range (−40°C to +125°C), with ±3.0% accuracy. When using the PLL, the maximum output frequency is 32 MHz (fPLL = 32 MHz, fIH = 24 MHz), enabling a minimum instruction execution time of 0.04167 μs under these conditions. This is confirmed in Section 1.6 and Figure 1-1 of the R01DS0274EJ0130 datasheet.

Does the R5F11CBCMNA#U0 support LIN bus communication?

Yes, the R5F11CBCMNA#U0 includes one UART channel explicitly supporting LIN-bus protocol (ISO 17987), as stated in Section 1.1 "Features" and Section 1.6 "Outline of Functions". This UART operates at standard LIN baud rates (e.g., 19.2 kbps) and includes hardware support for LIN header detection and checksum generation, eliminating software overhead for basic LIN frame handling.

How many analog input channels does the R5F11CBCMNA#U0 support for its 24-bit ΔΣ ADC?

The R5F11CBCMNA#U0 supports three fully differential programmable gain instrumentation amplifier input channels (PGA0–PGA2), each configurable for differential or single-ended operation. These map to six dedicated analog input pins (PGA0P/N, PGA1P/N, PGA2P/N), and the device also provides eight additional analog input pins (ANI0–ANI7) for the 10-bit SAR ADC - but only the three PGA channels feed the 24-bit ΔΣ converter. This is detailed in Sections 1.1 and 1.6 of the datasheet.

What is the purpose of the SBIAS pin on the R5F11CBCMNA#U0?

The SBIAS pin on the R5F11CBCMNA#U0 delivers a programmable, low-noise bias voltage (0.5 V to 2.2 V) for exciting MEMS sensors such as accelerometers or pressure transducers. It is internally regulated and must be decoupled with a 0.22 μF capacitor to AVSS. This integrated excitation source eliminates the need for external precision voltage references or op-amp buffers in sensor signal chains, as specified in Sections 1.1 and 1.4 of the R01DS0274EJ0130 datasheet.

Is the R5F11CBCMNA#U0 pin-compatible with other RL78/I1E variants like R5F11CCCxxx?

No, the R5F11CBCMNA#U0 is not pin-compatible with R5F11CCCxxx devices. The R5F11CBCMNA#U0 uses a 32-pin HVQFN package, while R5F11CCCxxx variants use a 36-pin TFBGA package. Pin counts, layouts, and mechanical footprints differ fundamentally - requiring separate PCB designs. This is clearly shown in Figure 1-1 "Part Number, Memory Size, and Package of RL78/I1E" in the datasheet.