Renesas R5F101PFAFB#10

Overview

R5F101PFAFB#10 from Renesas is a 100-pin LFQFP, 0.5-mm pitch, industrial-grade RL78/G13 16-bit MCU with 64 KB flash, 4 KB data flash, 4 KB RAM, 32 MHz max CPU speed, and true low-power operation (66 μA/MHz active, 0.57 μA RTC+LVD). It targets battery-powered industrial sensors, smart meters, and embedded control systems requiring extended runtime and robust timing.

For engineers reviewing the R5F101PFAFB#10 datasheet, R5F101PFAFB#10 pinout, R5F101PFAFB#10 application, or R5F101PFAFB#10 equivalent, key selection criteria include its no-data-flash configuration, -40°C to +85°C industrial temperature grade (D), LFQFP-100 package, integrated RTC with calendar/alarm, and hardware BGO for concurrent code execution during data flash writes.

Technical Context

The R5F101PFAFB#10 implements the RL78 CPU core with 3-stage pipeline CISC architecture, supporting instruction execution times from 0.03125 μs (32 MHz HS mode) to 30.5 μs (32.768 kHz subsystem clock). It integrates a 12-bit interval timer, real-time clock with 99-year calendar and clock correction, and watchdog timer with dedicated low-speed oscillator.

Its peripheral set includes up to 16 channels of 10-bit A/D converter (with internal 1.45 V reference and temperature sensor), 8–16 channels of 16-bit timer, 2–4 UART/LIN interfaces, 3–10 I²C/Simplified I²C channels, and 2–8 CSI (SPI-compatible) channels - all configurable without external components for compact system design.

Key Specifications

Pinout & Package

Package: 100-pin LFQFP (14 × 14 mm, 0.5-mm pitch), RoHS-compliant, moisture sensitivity level 3 (MSL3).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit microcontroller applications.

Compared with R5F100PFAFB#10, the R5F101PFAFB#10 trades data flash capacity for lower cost and smaller die size - ideal for fixed-function controllers. Against R5F101PGAFA#V0, it offers higher I/O density and improved thermal performance in the finer-pitch LFQFP package, enabling more compact industrial modules.

Availability

R5F101PFAFB#10 is available at Aetrix Electronics and suitable for smart metering, industrial sensor nodes, and home appliance control requiring stable component supply, long-term lifecycle support, and industrial-temperature qualification.

Supply support for R5F101PFAFB#10 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 enterprise 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 timing or memory components.

FAQ

Does R5F101PFAFB#10 include an integrated data flash memory?

No, R5F101PFAFB#10 does not include data flash memory. The "101" in the part number explicitly denotes "data flash not provided", distinguishing it from "100" variants like R5F100PFAFB#10 which include 8 KB data flash. This configuration reduces cost and die size for applications that store parameters in external EEPROM or rely solely on code flash for firmware updates.

What is the operating temperature range certified for R5F101PFAFB#10?

R5F101PFAFB#10 is rated for industrial operation from -40°C to +85°C (grade "D"). This is confirmed by the "D" suffix in the ordering code structure per Renesas documentation, and aligns with its qualification for factory automation, smart grid infrastructure, and commercial HVAC systems where ambient extremes are expected.

Which package type and pitch does R5F101PFAFB#10 use?

R5F101PFAFB#10 uses a 100-pin LFQFP package with 0.5-mm pin pitch, as indicated by the "FB" suffix in the part number and verified in Table 1-1 of the RL78/G13 datasheet (R01DS0131EJ0380). Its body size is 14 × 14 mm, and it complies with JEDEC standard MS-026.

Can R5F101PFAFB#10 operate without an external crystal?

Yes, R5F101PFAFB#10 can operate fully from its high-speed on-chip oscillator, selectable from 1–32 MHz with ±1.0% accuracy across 1.8–5.5 V and -20 to +85°C. External crystals are optional and only needed for applications requiring tighter frequency tolerance than the on-chip oscillator provides.

How many analog input channels does R5F101PFAFB#10 support?

R5F101PFAFB#10 supports up to 26 analog input channels via its 10-bit A/D converter, as specified in the RL78/G13 datasheet Section 1.1 Features. This includes dedicated ANI0–ANI2 pins plus additional multiplexed channels accessible through port pins such as P10–P17 and P30–P37 depending on configuration.

Is R5F101PFAFB#10 pin-compatible with any R5F100x variants?

R5F101PFAFB#10 is pin-compatible with R5F100PFAFB#10 and other "PFAFB"-suffixed 100-pin LFQFP variants in the RL78/G13 family. They share identical pin count, pitch, mechanical outline, and signal mapping - enabling drop-in replacement where data flash is not required, subject to firmware adaptation for missing data flash APIs.