Renesas R5F1057AANA#20

Overview

R5F1057AANA#20 from Renesas Electronics is a 24-pin HWQFN-packaged 16-bit RL78/G11 microcontroller designed for ultra-low-power general-purpose embedded control. It integrates 16 KB code flash, 2 KB data flash, 1.5 KB RAM, 11-channel 10-bit ADC, dual comparators, 2-channel 8-bit DAC, and supports 24 MHz operation delivering 33 DMIPS - deployed in battery-powered sensor nodes and industrial HMI panels requiring sub-1 μA STOP mode current.

For engineers reviewing the R5F1057AANA#20 datasheet, R5F1057AANA#20 pinout, R5F1057AANA#20 application, or R5F1057AANA#20 equivalent, key selection criteria include its 24-pin HWQFN (4 × 4 mm, 0.50-mm pitch) footprint, 1.6–5.5 V supply range, -40 to +85°C temperature grade, integrated LVD with 14-level programmability, and support for SNOOZE mode wake-up via serial interface events.

Technical Context

The R5F1057AANA#20 implements the RL78 CPU core with CISC architecture and 3-stage pipeline, enabling minimum instruction execution time of 0.04167 μs at 24 MHz using the high-speed on-chip oscillator (±1.0% accuracy). Its event link controller (ELC) supports 18 configurable event signals linked to peripherals including TAU timers, DTC, and serial interfaces.

Power management includes HALT, STOP, and SNOOZE modes with verified current consumption of 58.3 μA/MHz active, 0.64 μA in STOP with only LVD enabled, and 0.94 μA in SNOOZE with UART wake-up. The device uses a single-regulator architecture with REGC pin requiring 0.47–1 μF decoupling to VSS.

Key Specifications

Pinout & Package

Package: 24-pin plastic HWQFN (4 × 4 mm, 0.50-mm pitch), exposed die pad (recommended to connect to VSS).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F1057AANA#20, the R5F1058AALA#U0 offers identical functionality in a smaller WFLGA package but requires EVDD routing, while the R5F1056AASM#10 trades pin count and crystal support for lower cost and simpler layout - making the R5F1057AANA#20 optimal for balanced I/O, analog integration, and 24-pin HWQFN manufacturability.

Availability

R5F1057AANA#20 is available at Aetrix Electronics and suitable for smart thermostat control, industrial sensor nodes, home appliance UI panels, and medical patient monitor front-ends requiring stable component supply across automotive-qualified production cycles.

Supply support for R5F1057AANA#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 Corporation is a Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power devices for industrial, automotive, and IoT markets.

The RL78/G11 product line delivers true low-power embedded control with integrated analog peripherals and flexible clocking - engineered for cost-sensitive, battery-operated, and space-constrained applications demanding robustness and long-term supply stability.

FAQ

What is the maximum operating frequency and corresponding performance of the R5F1057AANA#20?

The R5F1057AANA#20 operates at up to 24 MHz using its high-speed on-chip oscillator, delivering 33 DMIPS of processing performance. Its minimum instruction execution time is 0.04167 μs under these conditions. The device also supports lower-frequency modes - including 15 kHz for ultra-low-power operation - with automatic clock switching managed by the on-chip clock generator.

Does the R5F1057AANA#20 support crystal oscillator input, and what are the valid frequency ranges?

Yes, the R5F1057AANA#20 supports external crystal/ceramic resonator input via X1/X2 pins. Valid frequencies depend on VDD: 1–20 MHz at 2.7–5.5 V, 1–16 MHz at 2.4–2.7 V, 1–8 MHz at 1.8–2.4 V, and 1–4 MHz at 1.6–1.8 V. The high-speed on-chip oscillator (±1.0% accuracy) serves as default boot clock, with optional transition to crystal after stabilization.

How many analog input channels does the R5F1057AANA#20 provide, and what reference options are available?

The R5F1057AANA#20 features 11 analog input channels (ANI0–ANI3 and ANI16–ANI22). It supports external references via AVREFP (+) and AVREFM (−) pins, and includes an internal 1.45 V reference voltage source. The ADC operates across the full 1.6–5.5 V supply range with 10-bit resolution and programmable sampling time.

Can the R5F1057AANA#20 perform flash memory writes while executing code from flash?

Yes, the R5F1057AANA#20 supports background operation (BGO) for its 2 KB data flash memory. Instructions can be executed from program memory while rewriting data flash - enabling real-time parameter updates, logging, or firmware patching without halting application execution. Code flash self-programming is also supported with boot swap and flash shield window protection.

What debug and programming interfaces are available on the R5F1057AANA#20?

The R5F1057AANA#20 includes an on-chip debug interface accessible via the TOOL0 (P40) and TOOLRXD/TOOLTXD (P55/P54) pins. It supports standard Renesas E1/E20 emulators and Flash Development Toolkit (FDT) for programming and real-time debugging. The debug function must be disabled in mass production to ensure flash endurance compliance.