Renesas R5F11Y68ASM#70

Overview

R5F11Y68ASM#70 from Renesas Electronics is an 8-bit RL78/G1N microcontroller in 20-pin TSSOP package, featuring 8 KB flash memory, 1 KB RAM, 8-channel 8/10-bit ADC, UART/CSI serial interfaces, four 16-bit timers, and ultra-low-power STOP mode (0.61 µA at 3 V). It targets battery-powered consumer devices requiring robust key-scan, buzzer control, and analog sensing.

For engineers reviewing the R5F11Y68ASM#70 datasheet, R5F11Y68ASM#70 pinout, R5F11Y68ASM#70 application, or R5F11Y68ASM#70 equivalent, this page delivers verified specifications, real-time output capability, high-current P-ch open-drain I/O (–120 mA per pin), SPOR voltage selection, and confirmed compatibility with RL78/G1N family development tools.

Technical Context

The R5F11Y68ASM#70 implements the RL78-S1 CPU core with 3-stage pipeline and supports instruction execution times from 0.05 µs (20 MHz) to 0.8 µs (1 MHz). Its peripheral set includes a dedicated 12-bit interval timer, watchdog timer with low-speed on-chip oscillator (15 kHz ±15%), and programmable clock/buzzer output (PCLBUZ0) operating up to 10 MHz.

It integrates key mixed-signal functions: 8 analog inputs with internal reference, on-chip key interrupt for up to 8-key matrix scanning, and real-time output (RTIO) support absent in G1M variants. The device uses selectable power-on-reset (SPOR) with four rising-edge thresholds (2.25 V to 4.45 V) and operates across –40°C to +85°C.

Key Specifications

Pinout & Package

Package: 20-pin plastic TSSOP (4.4 × 6.5 mm, 0.65 mm pitch), RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F11W68ASM#70, the R5F11Y68ASM#70 adds P-ch open-drain I/O for direct LED driving and RTIO for synchronized timing; versus R5F11Y67ASM#70, it doubles flash and RAM to support field-upgradable firmware and multi-sensor data buffering.

Availability

R5F11Y68ASM#70 is available at Aetrix Electronics and suitable for remote controls, smart thermostats, wireless transmitters, and portable medical devices requiring stable component supply and long-term industrial availability.

Supply support for R5F11Y68ASM#70 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/G1N product line is engineered for ultra-low-power consumer electronics with integrated high-current I/O, key-scan acceleration, and flexible clocking - targeting cost-sensitive, battery-operated human-interface devices.

FAQ

What is the maximum operating frequency of the R5F11Y68ASM#70 high-speed on-chip oscillator?

The R5F11Y68ASM#70 high-speed on-chip oscillator supports frequencies up to 20 MHz with ±2.0% accuracy across –20°C to +85°C. This enables minimum instruction execution time of 0.05 µs and supports UART baud rates up to 3.3 Mbps. The oscillator is user-selectable among 1.25 MHz, 2.5 MHz, 5 MHz, 10 MHz, and 20 MHz via option byte configuration.

Does the R5F11Y68ASM#70 support hardware key interrupt for matrix scanning?

Yes, the R5F11Y68ASM#70 includes dedicated key return (KR0–KR7) pins and on-chip key interrupt logic that automatically detects key presses across an 8×N matrix without CPU intervention. This reduces active time during polling and enables wake-from-STOP on key event, making it ideal for remote controls and keypad interfaces.

What are the absolute maximum ratings for output current on P00–P05 of the R5F11Y68ASM#70?

The R5F11Y68ASM#70 specifies absolute maximum output current of –120 mA per pin for P00–P05 in P-ch open-drain mode at VDD = 4.5–5.5 V. Total sink current across all P00–P05 must not exceed –140 mA under 70% duty cycle conditions. Exceeding these limits risks permanent damage to the I/O structure.

Can the R5F11Y68ASM#70 generate precise audio tones for user feedback?

Yes, the R5F11Y68ASM#70 features a programmable clock/buzzer output (PCLBUZ0) capable of generating frequencies from 2.44 kHz to 10 MHz. When configured with the high-speed oscillator at 20 MHz, it produces stable 38 kHz IR carrier signals or audible tones (e.g., 2.5 kHz beep) with no external components - ideal for remote controls and medical device alerts.

What is the STOP mode current consumption of the R5F11Y68ASM#70 at 3 V?

The R5F11Y68ASM#70 achieves 0.61 µA typical supply current in STOP mode at VDD = 3 V and TA = 25°C, with a maximum of 2.35 µA across –40°C to +85°C. This ultra-low quiescent current enables multi-year battery life in applications like wireless sensors and remote controls where wake events are infrequent.