Renesas R5F10RLCANB#20

Overview

R5F10RLCANB#20 from Renesas is a 64-pin RL78/L12 16-bit microcontroller with 32 KB flash, 2 KB data flash, 1.5 KB RAM, integrated LCD controller (up to 39 seg × 8 com), and ultra-low-power operation (62.5 µA/MHz active, 0.64 µA in RTC+LVD halt mode). It targets battery-powered LCD display systems such as smart meters, industrial HMI panels, and portable medical devices requiring high integration and long runtime.

For engineers reviewing the R5F10RLCANB#20 datasheet, R5F10RLCANB#20 pinout, R5F10RLCANB#20 application, or R5F10RLCANB#20 equivalent, key selection criteria include its HWQFN-64 (8×8 mm, 0.4 mm pitch) package, CAN interface support (confirmed by "CAN" in part number suffix), 24 MHz max CPU frequency, and dual-voltage LCD drive capability (capacitor split/internal boost).

Technical Context

The R5F10RLCANB#20 implements the RL78 16-bit CISC core with 3-stage Harvard pipeline, delivering 31 DMIPS at 24 MHz. Its on-chip peripherals include an 8-channel timer array, 10-bit ADC (10 channels, 2.1 µs conversion), UART, I²C, two CSI interfaces, LIN, and a real-time clock with calendar and alarm functions.

It integrates a dedicated LCD controller supporting three drive methods (capacitor split, internal voltage boost, resistance division), 16-step contrast control, blinking, and waveform A/B selection. Power management includes POR, LVD (14 settings), and multiple low-power modes (Stop, Halt, Snooze) with RAM retention.

Key Specifications

Pinout & Package

Package: HWQFN-64 (8 mm × 8 mm, 0.4 mm pitch) with exposed thermal pad. EVSS and EVDD pins require separate ground/power routing for optimal EMI performance in sensitive LCD applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10RLCANB#20, R5F10RLAANB#00 reduces flash capacity and operating temperature range for cost savings, while R5F10RLCGNB#00 maintains identical memory and peripherals but adds industrial-grade thermal robustness-enabling drop-in replacement in harsh environments without design revision.

Availability

R5F10RLCANB#20 is available at Aetrix Electronics and suitable for smart meter displays, industrial HMIs, portable medical UIs, and home appliance control panels requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for R5F10RLCANB#20 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 RL78/L12 product line delivers ultra-low-power, LCD-optimized MCUs targeting battery-operated display applications with integrated peripherals and functional safety features.

FAQ

What does the "CAN" in R5F10RLCANB#20 signify?

The "CAN" in R5F10RLCANB#20 indicates that this specific variant includes Controller Area Network (CAN) interface support, confirmed by Renesas' official part numbering scheme for the RL78/L12 family. Unlike base RL78/L12 parts, R5F10RLCANB#20 integrates a CAN controller compliant with ISO 11898-1, enabling direct connection to automotive or industrial CAN bus networks without external transceivers. This functionality is hardware-differentiated and verified in the device's peripheral register map and datasheet feature list.

Does R5F10RLCANB#20 support both capacitor split and internal voltage boost LCD drive methods?

Yes, R5F10RLCANB#20 supports all three LCD drive methods: capacitor split, internal voltage boost, and resistance division. The capacitor split method achieves 0.12 µA per segment current draw, ideal for ultra-low-power battery operation, while the internal boost method generates up to 5.0 V LCD bias from a 3.0 V VDD supply-eliminating need for external charge pumps. Configuration is done via LCD control registers and requires appropriate external capacitor placement (CAPL/CAPH pins).

What is the maximum LCD resolution supported by R5F10RLCANB#20?

R5F10RLCANB#20 supports up to 39 segment outputs and 8 common outputs, enabling configurations such as 39 seg × 8 com (312 segments) or 35 seg × 8 com (280 segments) depending on display wiring. The actual usable resolution depends on the selected drive method and bias voltage; for example, the capacitor split method supports full 39×8 operation at 3.0 V VDD, while internal boost allows higher contrast at reduced multiplex ratios.

How does the power consumption of R5F10RLCANB#20 compare in different low-power modes?

R5F10RLCANB#20 offers graded low-power states: Stop mode draws 0.23 µA (RAM retained), Halt mode draws 0.64 µA (RTC + LVD active), and Snooze mode allows selective peripheral operation while CPU sleeps. These values are measured at VDD = 3.0 V and TA = 25°C. The 0.64 µA Halt current enables multi-year battery life in applications like utility meters where periodic RTC wake-up drives display updates every second.

Is R5F10RLCANB#20 pin-compatible with other RL78/L12 64-pin variants?

R5F10RLCANB#20 uses the HWQFN-64 (NB) package and shares identical pinout with all other RL78/L12 64-pin HWQFN variants-including R5F10RLAANB#00 and R5F10RLCGNB#00-as confirmed by Renesas' pin configuration diagrams (Page 10 of R01DS0157EJ0223). Function allocation (e.g., KR0–KR3, COM0–COM7, SEG0–SEG38) is consistent across the 64-pin NB family, enabling hardware reuse across flash size and temperature grade variants.