Renesas R5F11Y68DSM#50

Overview

R5F11Y68DSM#50 from Renesas Electronics is an RL78/G1N-series 16-bit microcontroller in a 20-pin TSSOP package, featuring 8 KB flash memory, 1 KB RAM, and industrial-grade operation (−40°C to +85°C). It integrates an 8/10-bit 8-channel ADC, UART/CSI serial interfaces, four 16-bit timers, watchdog and interval timers, and supports ultra-low-power HALT/STOP modes - deployed in smart metering and industrial sensor nodes requiring deterministic real-time control.

For engineers reviewing the R5F11Y68DSM#50 datasheet, R5F11Y68DSM#50 pinout, R5F11Y68DSM#50 application, or R5F11Y68DSM#50 equivalent, key selection criteria include its P-ch open-drain high-current I/O capability (−130 mA total sink), 20 MHz high-speed on-chip oscillator (±2% accuracy), 0.05 µs minimum instruction cycle, and industrial temperature-rated TSSOP-20 packaging with embossed tape delivery (#50).

Technical Context

The R5F11Y68DSM#50 implements the RL78-S1 CPU core with CISC architecture and 3-stage pipeline, supporting configurable clock sources including selectable high-speed on-chip oscillator (1.25–20 MHz) and low-speed 15 kHz oscillator. Its peripheral set includes TAU (Timer Array Unit) with four 16-bit timer channels and dedicated real-time output logic for precise waveform generation.

It features dual-mode I/O: N-ch open-drain outputs (VDD-tolerant, 14 pins) and P-ch open-drain outputs (high-current, 6 pins), with on-chip pull-up resistors (10–100 kΩ) and key interrupt support across eight KR inputs. The device uses a selectable power-on-reset (SPOR) circuit with four rising-edge detection thresholds (2.25 V to 4.45 V).

Key Specifications

Pinout & Package

Package: 20-pin plastic TSSOP (4.4 × 6.5 mm, 0.65 mm pitch), embossed tape packaging (#50).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F11Y67DSM#50, the R5F11Y68DSM#50 provides double flash/RAM for field-upgradable firmware; versus R5F11W68DSM#50, it trades RTIO for industrial-grade P-ch I/O - making it optimal for load-driving sensor nodes rather than time-critical waveform generation.

Availability

R5F11Y68DSM#50 is available at Aetrix Electronics and suitable for smart metering, industrial sensor nodes, and PLC I/O modules requiring stable component supply across extended product lifecycles.

Supply support for R5F11Y68DSM#50 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/G1N product line targets cost-sensitive industrial control applications demanding high-current I/O, ultra-low standby power, and robust operation across extended temperature ranges - with R5F11Y68DSM#50 optimized for embedded systems needing direct load driving without external buffers.

FAQ

What is the maximum allowable supply voltage for R5F11Y68DSM#50?

The absolute maximum supply voltage (VDD) for R5F11Y68DSM#50 is +6.5 V, but operational use must remain within 2.0–5.5 V. Crucially, due to the selectable power-on-reset (SPOR) circuit's 2.25 V minimum detection threshold, reliable operation requires VDD ≥ 2.25 V. Exceeding 5.5 V risks permanent damage per Absolute Maximum Ratings.

Does R5F11Y68DSM#50 support real-time output (RTIO) functionality?

No, R5F11Y68DSM#50 does not support real-time output (RTIO). This feature is exclusive to the RL78/G1M group (e.g., R5F11W68DSM#50). The R5F11Y68DSM#50 belongs to the RL78/G1N group, which omits RTIO in favor of enhanced P-ch open-drain I/O capability - confirmed in datasheet Section 1.6 and block diagrams.

What is the purpose of the P-ch open-drain outputs on R5F11Y68DSM#50?

The P-ch open-drain outputs (on P00–P05) of R5F11Y68DSM#50 provide high-current sinking capability (−120 mA per pin, −140 mA total), enabling direct drive of industrial loads like 24 V DC relays, LEDs, or solenoids without external transistor buffers - a key differentiator from standard CMOS or N-ch open-drain I/O.

Can R5F11Y68DSM#50 operate from a 2.0 V supply?

R5F11Y68DSM#50 is rated for 2.0–5.5 V operation, but functional use below 2.25 V is not guaranteed due to the SPOR circuit's minimum rising-edge detection voltage. At VDD = 2.0–2.24 V, reset behavior becomes unreliable; Renesas explicitly recommends operation ≥2.25 V to ensure robust power-on sequencing and brown-out immunity.

How many analog input channels does R5F11Y68DSM#50 support?

R5F11Y68DSM#50 supports eight analog input channels (ANI0–ANI7), compatible with both 8-bit and 10-bit A/D conversion modes. These inputs operate across a 2.4–5.5 V analog supply range and are internally multiplexed to a single successive-approximation ADC core - confirmed in Sections 1.1, 1.6, and 2.3.3 of the datasheet.