Renesas R5F11Y67ASM#70

Overview

R5F11Y67ASM#70 from Renesas Electronics is an ultra-low-power 16-bit RL78/G1N microcontroller in a 20-pin TSSOP package, featuring 4 KB flash memory, 512 B RAM, 8-channel 8/10-bit ADC, 4-channel 16-bit timer, UART/CSI serial interfaces, and operation from 2.0–5.5 V across –40°C to +85°C. It targets battery-powered consumer control systems requiring compact size and deterministic real-time response.

For engineers reviewing the R5F11Y67ASM#70 datasheet, R5F11Y67ASM#70 pinout, R5F11Y67ASM#70 application, or R5F11Y67ASM#70 equivalent, key selection considerations include its 4 KB flash capacity, N-ch/P-ch open-drain I/O configuration (14/6), 20 MHz high-speed on-chip oscillator accuracy (±2.0%), and support for HALT/STOP low-power modes with sub-µA current draw.

Technical Context

The R5F11Y67ASM#70 implements the RL78-S1 CPU core with CISC architecture and 3-stage pipeline, enabling minimum instruction execution time of 0.05 µs at 20 MHz. Its peripheral set includes a 12-bit interval timer, watchdog timer, programmable clock/buzzer output (PCLBUZ0), and key interrupt controller supporting up to 8 keys.

It integrates a selectable power-on-reset (SPOR) circuit with four rising-edge detection thresholds (2.25 V/2.68 V/3.02 V/4.45 V), and supports peripheral I/O redirection via PIOR register-enabling flexible pin assignment for UART, CSI, timer I/O, and analog inputs without hardware redesign.

Key Specifications

Pinout & Package

Package: 20-pin plastic TSSOP (4.4 × 6.5 mm, 0.65 mm pitch), JEDEC standard PTSP0020JI-A footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F11W67ASM#30, the R5F11Y67ASM#70 adds P-ch open-drain I/O for direct LED control and RTIO functionality-making it superior for user-interface-intensive designs. Against R5F11Y68ASM#50, it trades flash/RAM headroom for lower unit cost while retaining identical real-time performance and power efficiency.

Availability

R5F11Y67ASM#70 is available at Aetrix Electronics and suitable for smart home sensors, portable medical monitors, industrial HMI panels, and appliance user interfaces requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for R5F11Y67ASM#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 specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/G1N product line delivers ultra-low-power 16-bit MCUs optimized for cost-sensitive consumer and industrial control applications-emphasizing energy efficiency, integrated peripherals, and simplified system design.

FAQ

What is the maximum operating frequency of the R5F11Y67ASM#70?

The R5F11Y67ASM#70 supports a maximum high-speed on-chip oscillator frequency of 20 MHz, delivering a minimum instruction execution time of 0.05 µs under 2.7–5.5 V supply conditions. This frequency is factory-configurable via option byte settings and does not require an external crystal.

Does the R5F11Y67ASM#70 support external crystal oscillators?

No-the R5F11Y67ASM#70 relies exclusively on its internal high-speed (1.25–20 MHz) and low-speed (15 kHz) on-chip oscillators. It does not provide dedicated XTAL/EXTAL pins or circuitry for external crystal connection, aligning with its ultra-low-cost, minimal-BOM design goal.

How many analog input channels does the R5F11Y67ASM#70 have?

The R5F11Y67ASM#70 integrates an 8/10-bit resolution A/D converter with eight analog input channels (ANI0–ANI7), each accessible via dedicated pins or multiplexed I/O. The ADC operates across the full 2.4–5.5 V VDD range and supports software-triggered or timer-triggered conversions.

Can the R5F11Y67ASM#70 drive LEDs directly?

Yes-the R5F11Y67ASM#70 features six P-ch open-drain output pins (P00–P05) rated for up to 120 mA total sink current at 4.5–5.5 V, enabling direct driving of common-anode LEDs without external transistors. N-ch open-drain pins (P06–P16, P40) support up to 40 mA per pin but cannot source high-level voltage.

What debug interface does the R5F11Y67ASM#70 provide?

The R5F11Y67ASM#70 includes an on-chip debug function accessible via the TOOL0 pin and SWD-compatible protocol, supporting full-featured emulation, flash programming, breakpoint setting, and real-time variable monitoring-eliminating the need for external debug probes during development.