Renesas R5F1051AGSP#50

Overview

R5F1051AGSP#50 from Renesas Electronics is a 10-pin, industrial-grade RL78/G11 16-bit microcontroller featuring 16 KB code flash, 2 KB data flash, and 1.5 KB RAM. It operates from 1.6 V to 5.5 V, delivers 33 DMIPS at 24 MHz, and achieves ultra-low power consumption of 58.3 μA/MHz - optimized for battery-powered sensor nodes and compact control modules in HVAC and smart metering.

For engineers reviewing the R5F1051AGSP#50 datasheet, R5F1051AGSP#50 pinout, R5F1051AGSP#50 application, or R5F1051AGSP#50 equivalent, this page provides verified technical context, validated pin functions, real-world use cases, and two confirmed alternative parts with documented functional and packaging differences.

Technical Context

The R5F1051AGSP#50 integrates the RL78 CPU core with a 3-stage pipeline, supporting instruction execution times from 0.04167 μs (24 MHz high-speed on-chip oscillator) to 66.6 μs (15 kHz low-speed mode). It includes a 10-bit A/D converter with 3 external analog inputs (ANI0–ANI2), 1-channel 8-bit D/A output (ANO1), and dual comparators with window mode support.

Power management features include HALT, STOP, and SNOOZE modes; on-chip LVD with 14 selectable voltage detection levels; and POR circuitry rated at 1.51 ± 0.04 V. The device uses a single 10-pin LSSOP package (4.4 × 3.6 mm, 0.65-mm pitch) with REGC capacitor decoupling required between REGC and VSS.

Key Specifications

Pinout & Package

Package: 10-pin plastic LSSOP (4.4 × 3.6 mm, 0.65-mm pitch); requires 0.47–1 μF capacitor between REGC and VSS.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 10-pin microcontroller applications.

Compared with R5F1051AGSP#50, the R5F1051AASP#50 offers identical functionality at lower cost but sacrifices industrial temperature qualification, while the RL78/G12 R5F10PLGSP#50 provides architectural upgrades and memory expansion - both require validation of thermal margin and firmware compatibility.

Availability

R5F1051AGSP#50 is available at Aetrix Electronics and suitable for smart thermostat sensor nodes, industrial panel meter interfaces, low-power smoke detectors, and appliance motor control monitors requiring stable component supply across extended temperature ranges.

Supply support for R5F1051AGSP#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 Corporation is a global semiconductor leader headquartered in Tokyo, Japan, specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and IoT markets.

The RL78/G11 product line targets cost-sensitive, ultra-low-power general-purpose applications - delivering true low-power performance (58.3 μA/MHz) with integrated analog peripherals and robust industrial temperature support in minimal pin-count packages.

FAQ

What is the maximum operating frequency of the R5F1051AGSP#50?

The R5F1051AGSP#50 supports a maximum system clock frequency of 24 MHz using its high-speed on-chip oscillator. When driven by an external crystal (X1), the maximum frequency is 20 MHz at VDD ≥ 2.7 V, scaling down to 4 MHz at VDD = 1.6 V. Instruction execution time is 0.04167 μs at 24 MHz, delivering 33 DMIPS performance.

Does the R5F1051AGSP#50 support in-system programming via its dedicated debug interface?

Yes, the R5F1051AGSP#50 includes an on-chip debug function accessible via the TOOL0 pin (P40) and RESET pin, enabling full-featured debugging and flash programming during development. However, Renesas explicitly cautions against using this feature in mass-produced units due to potential flash endurance degradation beyond guaranteed rewrite cycles.

How many analog input channels does the R5F1051AGSP#50 provide, and what is their resolution?

The R5F1051AGSP#50 provides three external analog input channels (ANI0, ANI1, ANI2) and one internal temperature sensor, all serviced by a single 10-bit successive-approximation A/D converter. Input voltage range is 0 V to VDD, with optional internal 1.45 V reference or external differential reference using AVREFP/AVREFM pins.

What is the purpose of the REGC pin on the R5F1051AGSP#50, and how must it be connected?

The REGC pin on the R5F1051AGSP#50 stabilizes the internal voltage regulator. It must be connected directly to VSS through a 0.47 μF to 1 μF ceramic capacitor - no series resistance or inductance permitted. Failure to implement this decoupling violates absolute maximum ratings and will cause unpredictable reset behavior or analog performance degradation.

Can the R5F1051AGSP#50 generate PWM signals, and if so, how?

The R5F1051AGSP#50 does not include dedicated PWM generator hardware, but supports PWM generation via software-controlled GPIO toggling synchronized to its 16-bit timer array (TAU) outputs (TO03, TKBO0, TKBO1) or 8-bit interval timer interrupts. Output resolution and frequency depend on selected clock source and timer reload values - typical implementation yields 8–10 bit effective resolution at ≤10 kHz.