Renesas R5F101LDDFB#X0

Overview

R5F101LDDFB#X0 from Renesas is a 64-pin LFQFP-packaged RL78/G13 16-bit microcontroller with 64 KB flash, 4 KB data flash, 4 KB RAM, and industrial-grade operation (−40°C to +85°C). It integrates a real-time clock, 10-bit ADC (26 channels), UART/SPI/I²C interfaces, and ultra-low-power modes (0.57 μA in RTC+LVD mode) for embedded control in metering, HVAC, and industrial sensors.

For engineers reviewing the R5F101LDDFB#X0 datasheet, R5F101LDDFB#X0 pinout, R5F101LDDFB#X0 application, or R5F101LDDFB#X0 equivalent, key selection criteria include its 64-pin LFQFP-0.5mm pitch package, absence of on-chip data flash (R5F101x series), 32 MHz max CPU speed, and support for SNOOZE mode DMA transfers during low-power operation.

Technical Context

The R5F101LDDFB#X0 implements the RL78 CPU core with a 3-stage pipeline, supporting instruction execution times from 0.03125 μs (32 MHz high-speed mode) to 30.5 μs (32.768 kHz subsystem clock). Its memory architecture separates code flash (64 KB) from dedicated data flash (none - confirmed by R5F101x family designation), relying instead on flash library-managed self-programming using reserved RAM at FF300H.

Power management includes HALT, STOP, and SNOOZE modes, with LVD interrupt/reset selectable across 14 voltage levels and POR circuitry. Peripheral integration features 8–16× 16-bit timers, 1× real-time clock with calendar/alarm, 2–4 channel DMA, and 3–10 channel I²C/Simplified I²C - all operating within 1.6–5.5 V supply range.

Key Specifications

Pinout & Package

64-pin LFQFP (PLQP0064KF-A), 10 × 10 mm body, 0.5 mm pitch, exposed pad not electrically connected. Pin mapping conforms to RL78/G13 standard pin configuration for 64-pin variants, with P0–P15 port groups, AVREFP/AVREFM analog references, and dedicated reset (RES), oscillation (X1/X2), and debug (BKGD) pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F101LDDFB#X0, the VFBGA variant saves >60% board area but increases assembly complexity, while the LQFP variant eases manufacturing at the cost of 44% larger footprint - both retain identical firmware compatibility and peripheral timing.

Availability

R5F101LDDFB#X0 is available at Aetrix Electronics and suitable for smart metering, HVAC control, and industrial sensor nodes requiring stable component supply, long-term lifecycle assurance, and industrial-temperature grade reliability.

Supply support for R5F101LDDFB#X0 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 Corporation is a Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power devices for automotive, industrial, and IoT markets.

The RL78/G13 product line delivers ultra-low-power 16-bit MCUs optimized for cost-sensitive, battery-operated, and industrial control applications - balancing performance, integration, and energy efficiency without external PMIC dependency.

FAQ

Does R5F101LDDFB#X0 include on-chip data flash memory?

No, R5F101LDDFB#X0 does not include on-chip data flash memory. As indicated by the "101" prefix in the RL78/G13 family naming convention, this device provides 64 KB of code flash only. Data storage must be implemented using code flash sectors with wear-leveling firmware or external EEPROM/FRAM. The R5F100x series variants offer 4–8 KB of dedicated data flash.

What is the maximum operating frequency and corresponding current consumption of R5F101LDDFB#X0?

R5F101LDDFB#X0 operates up to 32 MHz using the high-speed on-chip oscillator (±1.0% accuracy). At this frequency and 3.3 V supply, active-mode current is 66 μA/MHz (2.11 mA typical). In STOP mode with RTC and LVD enabled, current drops to 0.57 μA - verified across −40°C to +85°C per R01DS0131EJ0380 Rev.3.80.

Which debug interface does R5F101LDDFB#X0 support, and what hardware is required?

R5F101LDDFB#X0 supports single-wire on-chip debugging via the BKGD pin using Renesas E1 or E20 emulators. No JTAG header is required. Debug functionality includes flash programming, real-time variable watch, and breakpoint execution - all accessible through CS+ or e2 studio IDEs without additional level-shifting circuitry.

Can R5F101LDDFB#X0 drive 5 V logic peripherals directly from its GPIO pins?

Yes, selected GPIO pins (P00–P03, P10–P13, P20–P23) support 6 V-tolerant N-ch open-drain outputs, enabling direct interface with 5 V I²C, UART, or sensor peripherals when pulled up to 5 V. Other ports are VDD-referenced (max 5.5 V) but require external level shifters for true 5 V bidirectional signaling.

What packaging and reel specifications apply to R5F101LDDFB#X0?

R5F101LDDFB#X0 ships in embossed tape (JEDEC J-STD-020 compliant) per the "#X0" suffix, packaged in 1,000-unit reels. The LFQFP-64 package (PLQP0064KF-A) has 10 × 10 mm body, 0.5 mm pitch, and matte tin lead finish - compatible with standard lead-free reflow profiles (peak 260°C).