Renesas R5F1054AASP#50

Overview

R5F1054AASP#50 from Renesas is a 16-pin RL78/G11 16-bit microcontroller designed for ultra-low-power general-purpose embedded control. It integrates 16 KB code flash, 2 KB data flash, 1.5 KB RAM, 8-channel 10-bit ADC, dual UART, four CSI channels, two I²C interfaces, four 16-bit timers, and operates from 1.6 V to 5.5 V with 58.3 μA/MHz active current-ideal for battery-powered sensor nodes and smart home peripherals.

For engineers reviewing the R5F1054AASP#50 datasheet, R5F1054AASP#50 pinout, R5F1054AASP#50 application, or R5F1054AASP#50 equivalent, key selection criteria include its 16-pin SSOP package, 24 MHz max CPU speed, integrated LVD with 14-level detection, on-chip debug support, and compatibility with Renesas' Flash Self-Programming Library (start address FF900H).

Technical Context

The R5F1054AASP#50 implements the RL78 CPU core with CISC architecture and 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). Its event link controller (ELC) enables hardware-triggered peripheral chaining across 16 event sources and 4 trigger outputs.

Power management includes HALT, STOP, and SNOOZE modes; the regulator capacitor (REGC) pin requires a 0.47–1 μF capacitor to VSS. The device supports background operation (BGO) for data flash rewriting while executing program code, with 1,000,000 write cycles rated at VDD = 1.8–5.5 V.

Key Specifications

Pinout & Package

Package: 16-pin plastic SSOP (4.4 × 5.0 mm, 0.65-mm pitch), RoHS-compliant, tube packaging (#50 embossed tape variant confirmed).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F1054AGSP#50, the R5F1054AASP#50 trades industrial temperature rating for lower cost in consumer environments; versus R5F1056AASP#50, it reduces pin count and BOM complexity where 8 ADC channels and 16 I/O suffice-optimizing for compact, cost-sensitive edge nodes.

Availability

R5F1054AASP#50 is available at Aetrix Electronics and suitable for smart appliance control, industrial sensor nodes, home automation hubs, and medical wearable monitors requiring stable component supply and long-term production continuity.

Supply support for R5F1054AASP#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 is a global semiconductor leader delivering trusted embedded solutions for automotive, industrial, infrastructure, and IoT markets, with over 40 years of microcontroller innovation.

The RL78/G11 product line targets cost-sensitive, ultra-low-power general-purpose applications-including white goods, remote controls, and portable instrumentation-emphasizing energy efficiency, integrated analog, and rapid development with scalable toolchains.

FAQ

What is the maximum operating frequency and clock source flexibility of the R5F1054AASP#50?

The R5F1054AASP#50 supports up to 24 MHz operation using its high-speed on-chip oscillator (±1.0% accuracy, VDD = 1.8–5.5 V). It also accepts external crystal (X1/X2) or clock input (EXCLK) from 1–20 MHz depending on VDD, and offers middle-speed (4/2/1 MHz) and low-speed (15 kHz) on-chip oscillators for ultra-low-power modes. All clock sources are selectable via system registers without external components.

Does the R5F1054AASP#50 support in-system programming and secure firmware updates?

Yes, the R5F1054AASP#50 includes an on-chip debug interface and full self-programming capability with boot swap and flash shield window functions. The Flash Self-Programming Library (R20UT2944) uses RAM starting at address FF900H for safe rewrites. Firmware updates can be performed in-field via UART or custom bootloader-no external programmer required.

How many analog-to-digital converter (ADC) channels does the R5F1054AASP#50 provide, and what are their key electrical specs?

The R5F1054AASP#50 features an 8-channel, 10-bit successive-approximation ADC with input ranges from ANI0–ANI3 and ANI18, ANI20–ANI22. It supports internal 1.45 V reference and external AVREFP/AVREFM inputs, operates across the full 1.6–5.5 V supply range, and achieves typical INL of ±1 LSB. Conversion time is 1.5 μs per sample at 24 MHz CPU clock.

What packaging and compliance information applies to the R5F1054AASP#50?

The R5F1054AASP#50 is supplied in a 16-pin plastic SSOP package (4.4 × 5.0 mm, 0.65-mm pitch) with lead-free (RoHS-compliant) finish. The #50 suffix denotes embossed tape packaging per JEDEC standard. Pin 1 is marked by a notch; REGC requires mandatory 0.47–1 μF decoupling to VSS per datasheet Caution 1.

Can the R5F1054AASP#50 drive external loads directly, and what are its I/O current limits?

Yes-the R5F1054AASP#50 supports direct drive of LEDs, buzzers, and small relays. Per-pin output current is ±40 mA (sink/source), with total I/O sink limit of 170 mA and source limit of –170 mA. Ports P30–P33 and P51–P56 support higher per-pin drive (±100 mA), while P20–P23 are limited to ±1 mA sink/source for analog integrity. Absolute max ratings must not be exceeded.