Renesas R5F11W68DSM#30

Overview

R5F11W68DSM#30 from Renesas Electronics is an RL78/G1M-series 16-bit microcontroller designed for industrial sensor nodes and low-power control systems. It integrates 8 KB code flash, 1 KB RAM, an 8-channel 10-bit A/D converter, UART/CSI serial interfaces, four 16-bit timers, and operates across –40°C to +85°C with supply voltage 2.25–5.5 V.

For engineers reviewing the R5F11W68DSM#30 datasheet, R5F11W68DSM#30 pinout, R5F11W68DSM#30 application, or R5F11W68DSM#30 equivalent, key selection considerations include its TSSOP-20 industrial-grade packaging, real-time output capability (8 channels), selectable power-on-reset voltage options (2.25/2.68/3.02/4.45 V), and ultra-low STOP-mode current (0.61 µA at 3 V).

Technical Context

The R5F11W68DSM#30 implements the RL78-S1 CPU core with a 3-stage pipeline, supporting instruction execution times from 0.05 µs (20 MHz) to 0.8 µs (1 MHz). Its peripheral set includes a 12-bit interval timer, watchdog timer, on-chip high-speed oscillator (1.25–20 MHz ±2% accuracy), and low-speed oscillator (15 kHz ±15%).

It features 18 I/O pins - including 14 N-ch open-drain outputs with VDD tolerance and 6 P-ch open-drain outputs - and supports peripheral I/O redirection via PIOR register. The device enables real-time output functions exclusive to the RL78/G1M group, distinguishing it from the G1N variant.

Key Specifications

Pinout & Package

Package: 20-pin TSSOP (4.4 × 6.5 mm, 0.65 mm pitch), industrial-grade marking 'D', tray packaging (#30).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F11W67DSM#30, the R5F11W68DSM#30 provides double flash/RAM for complex firmware and field-upgradable features; versus R5F11Y68DSM#30, it retains real-time output and key interrupt architecture essential for sensor timing and keypad responsiveness - making it unsuitable for LCD-centric designs but superior for deterministic control loops.

Availability

R5F11W68DSM#30 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart thermostat controllers, programmable logic modules, and energy meter front-ends requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for R5F11W68DSM#30 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 headquartered in Tokyo, Japan, specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/G1M product line was engineered specifically for ultra-low-power industrial control applications demanding high integration, deterministic real-time response, and extended battery life - with R5F11W68DSM#30 representing its highest-memory 20-pin TSSOP offering for harsh-environment deployment.

FAQ

What is the maximum operating frequency and instruction execution time of the R5F11W68DSM#30?

The R5F11W68DSM#30 supports a maximum high-speed on-chip oscillator frequency of 20 MHz, enabling a minimum instruction execution time of 0.05 µs under 2.7–5.5 V supply conditions. At lower voltages (2.0–2.7 V), the minimum execution time increases to 0.2 µs. This timing is guaranteed across the full –40°C to +85°C industrial temperature range.

Does the R5F11W68DSM#30 support real-time output functionality, and how many channels are available?

Yes, the R5F11W68DSM#30 supports real-time output (RTIO) functionality - a feature exclusive to the RL78/G1M group. It provides eight dedicated RTIO channels (RTIO00–RTIO07), enabling hardware-synchronized waveform generation independent of CPU load, which is critical for precision timing in motor control or lighting applications.

What are the power supply requirements and low-power capabilities of the R5F11W68DSM#30?

The R5F11W68DSM#30 operates from 2.25 V to 5.5 V - not 2.0 V - due to SPOR circuit constraints. It delivers ultra-low power consumption: STOP mode draws just 0.61 µA (typical at 3 V/25°C), HALT mode consumes 390–980 µA, and active operation at 20 MHz draws 2.19–2.95 mA. These characteristics make it ideal for battery-powered industrial sensors.

How does the R5F11W68DSM#30 differ from the R5F11Y68DSM#30 in terms of I/O capability?

The R5F11W68DSM#30 (G1M) offers 14 N-ch open-drain I/Os with VDD tolerance and supports key interrupt (KR0–KR7) and real-time output. The R5F11Y68DSM#30 (G1N) replaces RTIO with high-current P-ch open-drain outputs (–120 mA COM, 15 mA SEG) optimized for LCD driving, but lacks key interrupt flexibility and real-time timing features essential for sensor/control applications.

Is on-chip debug supported on the R5F11W68DSM#30, and what are the usage limitations?

Yes, the R5F11W68DSM#30 includes an on-chip debug function accessible via TOOL0 (P40) and SWD interface. However, Renesas explicitly cautions against using this feature in mass-produced end products, as repeated debug access may exceed flash memory rewrite endurance limits and compromise long-term reliability. Debug should be restricted to development and qualification phases only.