Renesas R5F10377ANA#45

Overview

R5F10377ANA#45 from Renesas Electronics is a 24-pin HWQFN-packaged RL78/G12 16-bit microcontroller designed for ultra-low-power embedded control in consumer-grade applications (–40°C to +85°C). It integrates 4 KB code flash, 256 B RAM, 10-bit 8-channel ADC, 4-channel 16-bit TAU timer, and single UART/CSI interface - enabling compact sensor node and battery-powered appliance control.

For engineers reviewing the R5F10377ANA#45 datasheet, R5F10377ANA#45 pinout, R5F10377ANA#45 application, or R5F10377ANA#45 equivalent, key selection criteria include its 24-pin HWQFN-0.5 mm pitch package, absence of data flash memory, ±5.0% high-speed on-chip oscillator accuracy over –40°C to +85°C, and support for single UART/CSI serial interface with no I²C capability.

Technical Context

The R5F10377ANA#45 implements the RL78 CPU core with 3-stage pipeline CISC architecture, delivering 31 DMIPS at 24 MHz while consuming only 63 μA/MHz. Its peripheral set excludes DMA, CRC, safety guards, and data flash - distinguishing it from R5F102-series variants and aligning with cost-sensitive, low-complexity control tasks.

It operates from a single 1.8–5.5 V supply and supports multiple low-power modes (HALT, STOP, SNOOZE), with reset management via on-chip POR and 12-level LVD. The high-speed on-chip oscillator offers selectable frequencies from 1–24 MHz, with accuracy specified as ±5.0% across its full operating temperature range.

Key Specifications

Pinout & Package

Package: HWQFN-24, 4 × 4 mm, 0.5 mm pitch, exposed die pad (to be connected to VSS).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10277ANA#45, the R5F10377ANA#45 omits data flash and safety peripherals to reduce cost and power, making it optimal for fixed-function, cost-sensitive control. Against R5F10378ANA#45, it trades flash capacity for lower unit price where firmware size permits.

Availability

R5F10377ANA#45 is available at Aetrix Electronics and suitable for smart home sensors, USB-C power adapters, wireless remotes, and industrial panel meters requiring stable component supply and long-term production continuity.

Supply support for R5F10377ANA#45 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, and power solutions for automotive, industrial, and IoT markets.

The RL78/G12 family, including R5F10377ANA#45, was engineered for ultra-low-power general-purpose embedded control - balancing performance, integration, and energy efficiency in cost-sensitive consumer and industrial applications.

FAQ

What is the maximum operating frequency and instruction throughput of the R5F10377ANA#45?

The R5F10377ANA#45 operates at up to 24 MHz using its high-speed on-chip oscillator, achieving 31 DMIPS performance. Its minimum instruction execution time is 0.04167 µs at 24 MHz, enabled by the RL78's 3-stage pipeline CISC architecture. This throughput supports real-time sensor sampling, UART communication, and basic control loops without external acceleration.

Does the R5F10377ANA#45 include data flash memory?

No, the R5F10377ANA#45 does not include data flash memory. As confirmed in Renesas documentation, R5F103-series devices omit the 2 KB data flash present in R5F102-series counterparts. Firmware parameters must be stored in code flash or external memory, and self-programming of code flash requires careful sector management due to lack of dedicated data flash.

What serial communication interfaces are supported on the R5F10377ANA#45?

The R5F10377ANA#45 supports one UART channel and one CSI (Simplified SPI) channel. It does not include I²C hardware - unlike some R5F102 variants - and lacks DMA for serial transfers. UART is usable for host communication or BLE module interfacing, while CSI supports basic SPI peripheral control such as EEPROM or display drivers.

What is the oscillator accuracy specification for the R5F10377ANA#45 over temperature?

The high-speed on-chip oscillator of the R5F10377ANA#45 is specified at ±5.0% over the full operating ambient temperature range of –40°C to +85°C. This accuracy is sufficient for UART baud rate generation without external crystal in non-critical applications but precludes use in protocols requiring tighter timing, such as USB or high-speed I²C.

How many analog input channels does the R5F10377ANA#45 provide, and what is the resolution?

The R5F10377ANA#45 integrates an 8-channel, 10-bit successive approximation register (SAR) ADC. Input channels include ANI0–ANI3 and ANI16–ANI19, with internal 1.45 V reference voltage and temperature sensor support. This resolution and channel count suit precision thermistor reading, battery voltage monitoring, and multi-sensor conditioning in compact systems.