Renesas R5F11MMDAFB#50

Overview

R5F11MMDAFB#50 from Renesas is an ultra-low-power 16-bit RL78/L1A microcontroller with integrated LCD controller/driver (32/28 segment × 4/8 common), 12-bit A/D and D/A converters (10-channel ADC, 2-channel DAC), rail-to-rail operational amplifiers (3 channels), and internal voltage reference (1.5–2.5 V). It operates from 1.8 V to 3.6 V, delivers 33 DMIPS at 24 MHz, and targets battery-powered LCD-based consumer devices such as thermostats, blood glucose meters, and portable instrumentation.

For engineers reviewing the R5F11MMDAFB#50 datasheet, R5F11MMDAFB#50 pinout, R5F11MMDAFB#50 application, or R5F11MMDAFB#50 equivalent, key selection considerations include its 48 KB flash / 5.5 KB RAM memory configuration, 80-pin LFQFP package with LCD segment/com drivers, HALT-mode current of 0.68 μA (RTC2 + LVD enabled), and dual-oscillator support (24 MHz HOCO ±1.0%, 32.768 kHz XT1).

Technical Context

The R5F11MMDAFB#50 implements the RL78 CPU core with CISC architecture, 3-stage pipeline, and configurable instruction execution time (0.04167 μs @ 24 MHz to 30.5 μs @ 32.768 kHz). It integrates a dedicated LCD controller supporting internal boosting, capacitor-split, and external resistor division methods, with programmable VL1–VL4 power rails and CAPH/CAPL terminals for charge-pump operation.

Its analog subsystem includes three operational amplifiers - two with analog MUX inputs (MUX00–MUX01, MUX10–MUX11) and one general-purpose (AMP2), plus a single comparator with selectable internal/external reference. The 12-bit A/D converter features internal 1/2 AVDD reference and temperature sensor; the 12-bit D/A converter provides 0.35 V to AVDD – 0.47 V output range.

Key Specifications

Pinout & Package

Package: 80-pin plastic LFQFP (12 × 12 mm, 0.5 mm pitch), RoHS-compliant, consumer-grade (-40°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F11MMDAFB#50, R5F11MMEAFB#50 offers 16 KB more flash in identical packaging for incremental firmware growth, while R5F11MPFAFB#50 expands analog and display capability at the cost of larger footprint and higher pin count - enabling migration paths without architectural rework.

Availability

R5F11MMDAFB#50 is available at Aetrix Electronics and suitable for smart thermostat displays, blood glucose meters, programmable power tool interfaces, industrial panel meters, and portable instrumentation requiring stable component supply across long-lifecycle consumer programs.

Supply support for R5F11MMDAFB#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 delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, infrastructure, and IoT applications.

The RL78/L1A group is designed specifically for ultra-low-power LCD-based consumer electronics, integrating display control, precision analog, and energy-efficient processing in a single chip to eliminate discrete bias and signal-conditioning components.

FAQ

What is the maximum LCD segment count supported by the R5F11MMDAFB#50?

The R5F11MMDAFB#50 supports up to 32 segment outputs with 4 common lines or 28 segments with 8 common lines, as confirmed in the RL78/L1A datasheet Section 1.6. This configuration matches its 80-pin LFQFP package layout and internal LCD controller resource allocation - no external segment drivers are required for standard 4- or 8-com multiplexed displays.

Does the R5F11MMDAFB#50 include an internal voltage reference for its ADC and DAC?

Yes, the R5F11MMDAFB#50 includes an internal voltage reference generator with selectable outputs of 1.5 V, 1.8 V, 2.048 V, or 2.5 V (typical values), which can be used directly as the reference for both the 12-bit A/D and D/A converters. This eliminates the need for external reference ICs in precision measurement or calibration applications.

What are the power consumption figures for R5F11MMDAFB#50 in low-power modes?

The R5F11MMDAFB#50 achieves 0.68 μA in HALT mode (with RTC2 and LVD active), 0.94 μA in STOP mode, and 70.8 μA/MHz in active mode - all verified at VDD = 1.8–3.6 V and TA = -40°C to +85°C. These values are measured with the high-speed on-chip oscillator running and reflect true low-power operation for battery-critical applications.

Can the R5F11MMDAFB#50 drive an LCD without external components?

Yes - the R5F11MMDAFB#50 integrates a full LCD controller/driver supporting internal voltage boosting, capacitor-split, and external resistor division methods. With appropriate external capacitors on CAPH/CAPL and proper VLx pin configuration, it drives standard multiplexed LCDs autonomously, requiring no external bias ICs or charge pumps.

How many analog input channels does the R5F11MMDAFB#50 support?

The R5F11MMDAFB#50 supports 10 dedicated analog input channels (ANI00 through ANI09) as specified for the 80-pin RL78/L1A variants. Two additional channels (ANI12, ANI13) are also physically present and functional, bringing the total to 12 usable ADC inputs - sufficient for multi-sensor systems like environmental monitors or multi-parameter medical devices.