Renesas R5F110NEALA#U0

Overview

R5F110NEALA#U0 from Renesas is an ultra-low-power 16-bit RL78/L1C microcontroller with integrated LCD controller/driver (44 segment × 4 common), 12-bit A/D converter (12-channel, 2.4–3.6 V range), USB 2.0 function controller (full-speed/low-speed), and 96 KB flash memory. It operates from 1.6 V to 3.6 V, achieves 33 DMIPS at 24 MHz, and targets battery-powered LCD-based human interface devices such as smart meters and portable medical displays.

For engineers reviewing the R5F110NEALA#U0 datasheet, R5F110NEALA#U0 pinout, R5F110NEALA#U0 application, or R5F110NEALA#U0 equivalent, key selection criteria include its VFLGA-85 package, USB 2.0 functionality, integrated LCD drive capability up to 176 segments, true low-power modes (0.68 μA RTC+LVD), and support for battery charging specification v1.2.

Technical Context

The R5F110NEALA#U0 implements the RL78 CPU core with CISC architecture, 3-stage pipeline, and configurable instruction timing (0.04167 μs min @ 24 MHz to 30.5 μs @ 32.768 kHz). It integrates a dedicated USB voltage regulator (UREGC/UVBUS pins), on-chip high-speed oscillator (±1.0% accuracy), and event link controller (ELC) for deterministic peripheral triggering without CPU intervention.

Its LCD controller supports internal voltage boosting, capacitor split, and external resistor division methods; it drives up to 44 segments and 4 commons in standard configuration (expandable to 52 segments/8 commons via pin remapping). The USB function controller supports full-speed (12 Mbps) and low-speed (1.5 Mbps) modes and complies with Battery Charging Specification Rev. 1.2.

Key Specifications

Pinout & Package

Package: 85-pin plastic VFLGA (7 × 7 mm, 0.65 mm pitch), suitable for space-constrained LCD modules and compact consumer electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F110NEALA#U0, R5F110NFALA#U0 provides headroom for future firmware expansion without layout change, while R5F111NEALA#U0 removes USB hardware to lower system cost and power in non-connectivity applications - both retain identical LCD drive, low-power behavior, and peripheral feature set.

Availability

R5F110NEALA#U0 is available at Aetrix Electronics and suitable for smart metering, portable medical instrumentation, industrial HMI panels, and home appliance control systems requiring stable component supply, long-term lifecycle assurance, and qualified automotive-grade alternatives.

Supply support for R5F110NEALA#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 IoT markets.

The RL78/L1C product line is designed specifically for ultra-low-power LCD-based applications, integrating display driving, precision analog, USB connectivity, and robust real-time control in a single chip.

FAQ

What is the operating voltage range of the R5F110NEALA#U0?

The R5F110NEALA#U0 operates from 1.6 V to 3.6 V across all modes. Its 12-bit A/D converter requires ≥2.4 V for full-resolution operation, while USB functionality is active only above 2.7 V. The on-chip LVD supports 12 selectable threshold levels for precise brown-out detection.

Does the R5F110NEALA#U0 support USB device enumeration without external components?

Yes, the R5F110NEALA#U0 includes a fully integrated USB 2.0 function controller with internal transceivers and regulators. Only two external 0.33 μF (UREGC) and 0.47–1 μF (REGC) capacitors are required - no external PHY, resistors, or crystal is needed for basic full-speed enumeration.

How many LCD segments can the R5F110NEALA#U0 drive in its default configuration?

In its default 4-common configuration, the R5F110NEALA#U0 drives up to 44 segments (SEG0–SEG43). When configured for 8-common operation using pin remapping, it supports up to 52 segments (SEG0–SEG51), enabling larger segmented displays without external drivers.

What low-power modes are available on the R5F110NEALA#U0, and what is the lowest current draw?

The R5F110NEALA#U0 offers HALT, STOP, and SNOOZE modes. In STOP mode with RTC2 and LVD enabled, it draws just 0.68 μA at VDD = 3.0 V and TA = 25°C - sufficient for over 10-year operation on a CR2032 coin cell in metering applications.

Is the R5F110NEALA#U0 pin-compatible with other RL78/L1C variants in the VFLGA-85 package?

Yes, all RL78/L1C devices in the VFLGA-85 package (e.g., R5F110NFALA#U0, R5F111NEALA#U0) share identical pinouts and mechanical footprint. Functional differences (e.g., flash size, USB presence) do not affect PCB layout - enabling scalable design reuse across product tiers.