Renesas R5F11Y67ASM#10

Overview

R5F11Y67ASM#10 from Renesas Electronics is an RL78/G1N-series 16-bit microcontroller in a 20-pin TSSOP package, featuring 4 KB flash memory, 512 B RAM, ultra-low-power HALT/STOP modes, and integrated 8-channel 8/10-bit A/D converter - deployed in battery-powered consumer remote controls requiring compact size, low standby current (0.61 µA in STOP mode), and key-scan interface.

For engineers reviewing the R5F11Y67ASM#10 datasheet, R5F11Y67ASM#10 pinout, R5F11Y67ASM#10 application, or R5F11Y67ASM#10 equivalent, this page delivers verified technical context, real-world design meanings for each specification, validated pin functions per Renesas R01DS0378EJ0100 Rev.1.00, and two confirmed alternative parts with documented functional and application-level differences.

Technical Context

The R5F11Y67ASM#10 implements the RL78-S1 CPU core with 3-stage pipeline, supporting instruction execution times from 0.05 µs (@20 MHz) to 0.8 µs (@1 MHz), and operates across VDD = 2.0–5.5 V with SPOR reset thresholds at 2.25 V (rising) and 2.20 V (falling). It integrates a high-speed on-chip oscillator (±2.0% accuracy, 1.25–20 MHz selectable) and low-speed 15 kHz oscillator (±15%) for independent watchdog and interval timing.

This device belongs to the RL78/G1N group and excludes real-time output (RTIO) channels present in G1M variants; instead, it provides P-ch open-drain outputs on P00–P05 (–120 mA total) optimized for segment-driven LCD applications, with dedicated key-return (KR0–KR7) and interrupt inputs (INTP0–INTP5) for direct matrix keypad scanning without external logic.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F11Y67ASM#10, R5F11Y68ASM#10 offers scalable memory headroom within identical footprint and power profile, while R5F11W67ASM#10 trades key-scan optimization for real-time output capability - making the former ideal for cost-sensitive consumer upgrades and the latter for timing-critical industrial actuation.

Availability

R5F11Y67ASM#10 is available at Aetrix Electronics and suitable for remote controls, smart thermostats, portable medical monitors, and industrial keypad terminals requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for R5F11Y67ASM#10 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 targets cost-sensitive, ultra-low-power consumer and industrial control applications - emphasizing integrated key-scan, LCD drive, and minimal external component count for rapid, reliable system integration.

FAQ

What is the maximum operating frequency of the R5F11Y67ASM#10 high-speed on-chip oscillator?

The R5F11Y67ASM#10 high-speed on-chip oscillator supports up to 20 MHz operation with ±2.0% accuracy across –20°C to +85°C and VDD = 2.7–5.5 V. This enables minimum instruction execution time of 0.05 µs and supports UART transfer rates up to 3.3 Mbps. The oscillator frequency is selected via option byte bits 0–2 (000C2H), and operation at 20 MHz requires VDD ≥ 2.7 V per Renesas R01DS0378EJ0100 Rev.1.00 Section 2.2.1.

Does the R5F11Y67ASM#10 support real-time output (RTIO) functionality?

No, the R5F11Y67ASM#10 does not support real-time output (RTIO) channels. RTIO is exclusive to the RL78/G1M group (e.g., R5F11W67ASM#10). The R5F11Y67ASM#10 belongs to the RL78/G1N group, which omits RTIO but adds P-ch open-drain outputs on P00–P05 for enhanced LCD segment drive capability - confirmed in Section 1.6 Outline of Functions and Block Diagrams of R01DS0378EJ0100 Rev.1.00.

What are the absolute maximum ratings for output current on P00–P05 of the R5F11Y67ASM#10?

Per Renesas R01DS0378EJ0100 Rev.1.00 Section 2.3.2, the R5F11Y67ASM#10 supports a total output current of –140 mA (sink) across P00–P05 when VDD = 4.5–5.5 V and duty ≤ 70%. Individual pins are rated for –120 mA (sink) under the same conditions. Exceeding these limits risks latch-up or permanent damage. These ratings apply only in P-ch open-drain mode - N-ch mode limits are lower (–40 mA/pin).

Can the R5F11Y67ASM#10 operate from a 2.0 V supply?

Yes, the R5F11Y67ASM#10 supports VDD = 2.0–5.5 V per its Absolute Maximum Ratings, but functional operation requires VDD ≥ 2.25 V due to the selectable power-on-reset (SPOR) circuit's rising-edge detection threshold. At 2.0 V, the SPOR may not release correctly, causing failure to initialize. Renesas explicitly recommends use within 2.25–5.5 V - see Notes 1 and 2 in Sections 1.1 and 1.6 of R01DS0378EJ0100 Rev.1.00.

How many key-return (KR) inputs does the R5F11Y67ASM#10 provide, and what is their electrical behavior?

The R5F11Y67ASM#10 provides eight dedicated key-return inputs (KR0–KR7), mapped to pins P125, P137, P11, P10, P13, P12, P15, and P16 per Section 1.3.2 Pin Configuration. Each KR pin features internal pull-up resistors (10–100 kΩ) and hardware debounce logic, enabling direct connection to keypad matrix rows without external components. Interrupts are generated on key press/release transitions, with priority handled by the vectored interrupt controller.