Renesas R5F12068ASP#50

Overview

R5F12068ASP#50 from Renesas Electronics is an 8 KB flash, 1 KB RAM RL78/G15 20-pin LSSOP microcontroller operating at 2.4–5.5 V with 11-channel 8/10-bit ADC, dual comparators, and UART + dual simplified I²C + dual CSI interfaces - deployed in industrial sensor nodes and smart metering front-ends.

For engineers reviewing the R5F12068ASP#50 datasheet, R5F12068ASP#50 pinout, R5F12068ASP#50 application, or R5F12068ASP#50 equivalent, key selection criteria include its 20-pin LSSOP package, −40°C to +125°C M-grade operation, 8 KB code flash with self-programming, 11 analog inputs, and dual comparator support for precision threshold detection.

Technical Context

The R5F12068ASP#50 implements the RL78 CPU core with a 3-stage CISC pipeline, supporting minimum instruction execution times from 0.0625 μs (16 MHz) to 1.0 μs (1 MHz). It integrates a high-speed on-chip oscillator (1–16 MHz, ±1.0% accuracy at −20°C to +85°C) and low-speed 15 kHz oscillator for watchdog timing.

Its peripheral set includes an 8-channel 16-bit timer array (TAU0), 12-bit interval timer, watchdog timer, BCD correction circuit, and on-chip selectable power-on-reset (SPOR) with four voltage thresholds (2.25–4.45 V). The device supports background data flash rewriting only when not executing from code flash.

Key Specifications

Pinout & Package

Package: 20-pin LSSOP (4.4 × 6.5 mm, 0.65-mm pitch), RoHS-compliant, tape-and-reel (#50 packaging specification).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F12068ASP#50, R5F12067ASP#50 reduces code storage by 50% without altering I/O or timing capability, while R5F12068GSP#50 maintains identical functionality but relaxes thermal qualification - enabling trade-offs between firmware scalability, thermal margin, and BOM cost.

Availability

R5F12068ASP#50 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy meter front-ends, and programmable logic controller I/O modules requiring stable component supply across extended temperature ranges.

Supply support for R5F12068ASP#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 specializing in microcontrollers, analog, and power solutions for automotive, industrial, and IoT markets.

The RL78/G15 product line delivers ultra-low-power, cost-optimized 16-bit MCUs targeting battery-powered sensors, smart meters, and appliance controls - emphasizing integrated analog peripherals and robust industrial qualification.

FAQ

What is the maximum operating frequency and instruction execution time of the R5F12068ASP#50?

The R5F12068ASP#50 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 oscillator enabled and no wait states. The device also allows dynamic switching to lower frequencies (1–8 MHz) to reduce power consumption while maintaining deterministic real-time response.

Does the R5F12068ASP#50 support external crystal oscillation, and what are the valid frequency ranges?

Yes, the R5F12068ASP#50 supports external crystal or ceramic resonator operation via X1/X2 pins, with a valid frequency range of 1–12 MHz at VDD = 2.4–5.5 V. The device requires proper load capacitance matching and uses the oscillation stabilization time counter (OSTC) to confirm clock readiness before CPU initialization - critical for reliable boot in precision timing applications.

How many analog input channels and comparators does the R5F12068ASP#50 provide, and are they independently configurable?

The R5F12068ASP#50 provides 11 dedicated analog input channels (ANI0–ANI10) and two fully independent comparators (COMP0 and COMP1). Each comparator supports selection of internal (0.815 V) or external reference voltage, and both can operate simultaneously in high-speed or low-speed mode - enabling concurrent overvoltage and undervoltage monitoring without software intervention.

What serial communication interfaces are integrated into the R5F12068ASP#50, and how are they allocated across pins?

The R5F12068ASP#50 integrates one UART channel (RxD0/TxD0), two simplified I²C interfaces (IIC00/IIC01), and two CSI (SPI-compatible) channels (CSI00/CSI01). These are multiplexed across P00–P07, P20–P23, and P40–P41 - for example, SDA00/SCL00 appear on P01/P02, while SDA01/SCL01 map to P06/P07, allowing concurrent I²C bus management without external level shifters.

Is the R5F12068ASP#50 qualified for automotive or industrial temperature ranges, and what grade does the #50 suffix indicate?

The R5F12068ASP#50 carries the 'M' grade designation, qualifying it for industrial operation from −40°C to +125°C. The '#50' suffix specifies embossed tape packaging for LSSOP, SSOP, SOP, or WDFN packages - confirming this variant is supplied in tape-and-reel format compatible with automated SMT assembly, not tray or tube.