Renesas R5F12048MNA#40

Overview

R5F12048MNA#40 from Renesas Electronics is an 8 KB flash, 1 KB RAM RL78/G15 16-pin microcontroller with 7-channel 8/10-bit ADC, dual simplified I²C, UART, and 8-channel 16-bit timer array - designed for industrial temperature operation up to +125°C in HWQFN-16 package.

For engineers reviewing the R5F12048MNA#40 datasheet, R5F12048MNA#40 pinout, R5F12048MNA#40 application, or R5F12048MNA#40 equivalent, key selection criteria include its −40°C to +125°C M-grade qualification, 16-pin HWQFN (3 × 3 mm, 0.5-mm pitch) footprint, on-chip high-speed oscillator accuracy of ±1.0% (−20°C to +85°C), and support for background data flash writes at VDD = 2.4–5.5 V.

Technical Context

The R5F12048MNA#40 implements the RL78 CPU core with CISC architecture, 3-stage pipeline, and 1 MB address space. It integrates a selectable power-on-reset circuit with four detection voltage levels (2.25 V to 4.45 V), low-power HALT/STOP modes, and on-chip debug functionality compliant with Renesas E1/E20 emulators.

Its peripheral set includes two simplified SPI (CSI) channels, two simplified I²C channels, one full I²C bus interface, and a serial array unit (SAU0) supporting simultaneous UART, CSI, and I²C operation. The 12-bit interval timer and watchdog timer operate independently using the dedicated 15 kHz low-speed on-chip oscillator.

Key Specifications

Pinout & Package

Package: HWQFN-16 (3 × 3 mm, 0.5-mm pitch), thermally enhanced with exposed die pad requiring PCB thermal pad connection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F12047MNA#40, the R5F12048MNA#40 provides double code flash capacity for complex control algorithms or OTA update partitions; compared with R5F12048GNA#40, it delivers guaranteed operation at +125°C - critical for power electronics and automotive-adjacent industrial systems where thermal derating is unacceptable.

Availability

R5F12048MNA#40 is available at Aetrix Electronics and suitable for industrial motor control, smart power distribution, embedded HMI, and sensor node applications requiring stable component supply across extended temperature ranges.

Supply support for R5F12048MNA#40 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 specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/G15 product line delivers ultra-low-power, cost-optimized MCUs targeting industrial automation, appliance control, and sensor-edge devices - emphasizing robustness, integrated analog, and simplified development.

FAQ

What is the maximum operating frequency and instruction execution time of the R5F12048MNA#40?

The R5F12048MNA#40 supports a maximum high-speed on-chip oscillator frequency of 16 MHz, yielding a minimum instruction execution time of 0.0625 μs. This timing assumes operation with the high-speed on-chip oscillator enabled and no wait states; actual performance depends on flash access configuration and peripheral clock dividers. The RL78 core's 3-stage pipeline ensures deterministic execution across all supported frequencies.

Does the R5F12048MNA#40 support in-system programming and data retention during rewrites?

Yes, the R5F12048MNA#40 supports self-programming of both code and data flash memory without requiring a boot swap mechanism. Data flash rewrites occur at VDD = 2.4–5.5 V and guarantee 1,000,000 write cycles (typical). However, background operation (BGO) is not supported - code execution halts during data flash writes, requiring careful firmware sequencing to avoid system interruption.

How many analog input channels does the R5F12048MNA#40 provide, and what resolution options are available?

The R5F12048MNA#40 integrates an 8/10-bit successive approximation A/D converter with 7 analog input channels (ANI0–ANI6). Resolution is selectable per conversion, and the internal reference voltage is fixed at 0.815 V (typical). External reference inputs (IVREF0/IVREF1) are available on specific pins to support higher-precision measurements with external voltage references.

What communication interfaces are integrated into the R5F12048MNA#40, and how are they allocated across pins?

The R5F12048MNA#40 integrates UART (1 channel), simplified I²C (2 channels), simplified SPI (CSI, 2 channels), and full I²C bus (1 channel). These are distributed across P00–P07, P40–P41, and P121–P122: for example, P01 handles RxD0/SDA00, P02 provides SCK00/SCL00, and P07 supports SCK01/SCL01/SDAA0 - enabling concurrent dual I²C buses and UART without pin conflict.

Is the R5F12048MNA#40 pin-compatible with other RL78/G15 variants in the same package?

Yes, the R5F12048MNA#40 is pin-compatible with all other RL78/G15 devices in the HWQFN-16 package (e.g., R5F12047MNA#40, R5F12048GNA#40), sharing identical pin functions, electrical characteristics, and mechanical footprint. Firmware and PCB layout can be reused across these variants, differing only in flash size, temperature grade, and oscillator accuracy specifications.