Renesas R5F11W68ASM#30

Overview

R5F11W68ASM#30 from Renesas is an 8 KB flash, 1 KB RAM RL78/G1M 20-pin TSSOP microcontroller with ultra-low power consumption, 20 MHz high-speed on-chip oscillator (±2.0% accuracy), 8-channel 10-bit A/D converter, and integrated UART/CSI serial interfaces - deployed in battery-powered consumer control systems requiring reliable wake-up from HALT/STOP modes.

For engineers reviewing the R5F11W68ASM#30 datasheet, R5F11W68ASM#30 pinout, R5F11W68ASM#30 application, or R5F11W68ASM#30 equivalent, this page delivers verified package mapping (20-pin TSSOP), confirmed real-time output capability (8 channels), validated supply current specs (0.61 µA in STOP mode @ 3 V), and two field-tested alternative part numbers with documented functional trade-offs.

Technical Context

The R5F11W68ASM#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). It integrates a selectable power-on-reset (SPOR) circuit with four rising-edge detection thresholds (2.25 V to 4.45 V) and uses dual on-chip oscillators: a 15 kHz low-speed oscillator (±15%) for watchdog timing and a programmable high-speed oscillator (1.25–20 MHz).

Its peripheral set includes four 16-bit timer channels (TAU), one 12-bit interval timer, one watchdog timer, and real-time output (RTIO) functionality across eight pins - exclusive to the RL78/G1M group and absent in G1N variants. All I/O ports support N-ch open-drain outputs (14 pins) and on-chip pull-up resistors (10–100 kΩ), with key interrupt inputs mapped to KR0–KR7 pins.

Key Specifications

Pinout & Package

Package: 20-pin plastic TSSOP (4.4 × 6.5 mm, 0.65 mm pitch), RoHS-compliant, surface-mount.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F11W67ASM#30, the R5F11W68ASM#30 provides double flash/RAM for firmware scalability; compared with R5F11Y68ASM#30, it retains critical real-time output capability essential for jitter-sensitive PWM, making it the sole choice for LED lighting or motor timing applications.

Availability

R5F11W68ASM#30 is available at Aetrix Electronics and suitable for smart remote controls, LED lighting controllers, home appliance panels, and industrial sensor nodes requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant TSSOP packaging.

Supply support for R5F11W68ASM#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 delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/G1M product line targets ultra-low-power consumer and industrial control applications, emphasizing energy efficiency, integrated peripherals (RTIO, BCD), and robust operation across –40°C to +85°C.

FAQ

What is the maximum operating frequency and accuracy of the on-chip oscillator in R5F11W68ASM#30?

The R5F11W68ASM#30 features a high-speed on-chip oscillator selectable up to 20 MHz with ±2.0% accuracy over –20°C to +85°C and VDD = 2.0–5.5 V. This oscillator serves as the main system clock (fMAIN), enabling minimum instruction execution time of 0.05 µs. The low-speed oscillator runs at 15 kHz (±15%) for watchdog and interval timer use.

Does R5F11W68ASM#30 support real-time output (RTIO), and how many channels are available?

Yes, R5F11W68ASM#30 supports real-time output (RTIO) - a hardware feature exclusive to the RL78/G1M group. It provides eight dedicated RTIO channels (RTIO00–RTIO07), mapped to port pins P00–P07. These channels generate precise, CPU-independent PWM or pulse waveforms with sub-microsecond jitter, critical for LED dimming and motor control.

What are the key differences between R5F11W68ASM#30 and R5F11Y68ASM#30?

R5F11W68ASM#30 (G1M) and R5F11Y68ASM#30 (G1N) share flash/RAM size and package but differ functionally: G1M includes 8-channel RTIO and supports real-time PWM; G1N replaces RTIO with high-current P-ch open-drain outputs (up to 120 mA on P00–P05) and lacks RTIO entirely. Pin functions also differ - e.g., P137 on G1M is INTP0, while on G1N it supports SI00/RxD0.

What is the STOP mode supply current specification for R5F11W68ASM#30, and under what conditions is it measured?

The STOP mode supply current for R5F11W68ASM#30 is 0.61 µA (typical) at VDD = 3.0 V and TA = 25°C, with watchdog timer and A/D converter disabled. This ultra-low value assumes no I/O loading, no pull-up/pull-down activation, and exclusion of low-speed oscillator current. It enables multi-year operation on coin-cell batteries in wake-on-event designs.

Which serial interfaces are integrated into R5F11W68ASM#30, and what are their maximum data rates?

R5F11W68ASM#30 integrates one UART channel (RxD0/TxD0) and one CSI channel (SI00/SO00/SCK00). UART supports theoretical maximum transfer rates up to 3.3 Mbps when fMCK = 20 MHz. CSI operates in master or slave mode with SCK cycle time down to 200 ns (≥2.7 V), enabling SPI-compatible communication up to ~5 Mbps effective throughput depending on protocol overhead.