Renesas R5F10Y46ASP#10

Overview

R5F10Y46ASP#10 from Renesas is a 16-pin, 2 KB Flash, 256 B RAM RL78/G10 16-bit microcontroller with ultra-low power operation (46 µA/MHz), 2.0–5.5 V supply range, and integrated 20 MHz ±2% high-speed on-chip oscillator. It features 7-channel 10-bit ADC, 4-channel 16-bit timer array, UART, two CSI (SPI-compatible) interfaces, I²C, and key interrupt support - deployed in battery-powered sensor nodes and smart home control modules.

For engineers reviewing the R5F10Y46ASP#10 datasheet, R5F10Y46ASP#10 pinout, R5F10Y46ASP#10 application, or R5F10Y46ASP#10 equivalent, this page delivers verified technical context, package-accurate pin mapping, real-world use-value analysis, and validated alternative options for cost-sensitive, low-power embedded designs.

Technical Context

The R5F10Y46ASP#10 implements the RL78-S1 core - a Harvard-architecture CISC with 3-stage pipeline, where 78% of instructions execute in 1–2 clock cycles. Its timing subsystem integrates a selectable 1.25–20 MHz high-speed on-chip oscillator (±2% over –20 to +85°C), 15 kHz low-speed oscillator, and optional external crystal (X1/X2) or EXCLK input up to 20 MHz.

Peripherals include a 7-channel 10-bit ADC with 3.4 µs conversion time and internal 0.815 V reference, one comparator (IVCMP0/IVREF0/VCOUT0), four TAU0 timer channels supporting PWM output, and dual CSI serial interfaces - all mapped to dedicated pins on the 16-pin SSOP package with full peripheral I/O redirection via PIOR register.

Key Specifications

Pinout & Package

16-pin plastic SSOP (4.4 × 5.0 mm, 0.65 mm pitch), RoHS-compliant, surface-mount package with exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10Y44ASP#10 and R5F10Y47ASP#10, the R5F10Y46ASP#10 delivers optimal balance: sufficient memory for robust sensor firmware while avoiding over-provisioning costs - ideal for volume production of mid-tier IoT endpoints.

Availability

R5F10Y46ASP#10 is available at Aetrix Electronics and suitable for smart home controllers, industrial HMI panels, and portable medical devices requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant manufacturing.

Supply support for R5F10Y46ASP#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/G10 product line targets ultra-low-power, cost-sensitive embedded applications - designed specifically for battery-operated sensors, appliance controls, and simple HMI systems where minimal footprint and energy efficiency are primary constraints.

FAQ

What is the maximum operating frequency of the R5F10Y46ASP#10?

The R5F10Y46ASP#10 supports a maximum system clock frequency of 20 MHz using its internal high-speed on-chip oscillator, which maintains ±2% accuracy across –20 to +85°C and 2.0–5.5 V supply. When using an external crystal (X1/X2), it operates up to 20 MHz with appropriate load capacitance and stabilization timing handled via the OSTC register. The R5F10Y46ASP#10 does not require external clock circuitry for full-speed operation.

Does the R5F10Y46ASP#10 include an internal voltage reference for the ADC?

Yes, the R5F10Y46ASP#10 provides an internal 0.815 V (typ.) reference voltage (IVREF0) accessible at pin P04, specifically for use with its single comparator channel. While the ADC itself does not use this internal reference as its primary VREF, it supports external reference inputs and operates accurately down to 2.4 V supply - enabling reliable measurements even under brown-out conditions. This design choice prioritizes flexibility over fixed internal referencing.

Can the R5F10Y46ASP#10 drive LEDs directly without external drivers?

Yes, the R5F10Y46ASP#10 supports direct LED driving via its high-current I/O ports: each pin delivers up to 20 mA sink current (IOL = 20 mA per pin), and the total port current (P00–P07) is rated at 100 mA. Its TAU0 timer channels also provide hardware PWM outputs on TO00–TO03, allowing precise brightness control. However, source current (IOH) is limited to –10 mA per pin, so common-anode configurations require external pull-ups or transistor buffering.

Is the R5F10Y46ASP#10 pin-compatible with other RL78/G10 16-pin variants?

Yes, the R5F10Y46ASP#10 shares identical pinout, package dimensions (16-pin SSOP, 0.65 mm pitch), and peripheral mapping with all other 16-pin RL78/G10 devices including R5F10Y44ASP#10 and R5F10Y47ASP#10. All share the same function allocation per pin (e.g., P04 = ANI3/TI01/TO01/KR5/IVREF0), and differences are confined to Flash/RAM capacity and factory-programmed option bytes - enabling drop-in replacement within the same memory tier.

What debug interface does the R5F10Y46ASP#10 support?

The R5F10Y46ASP#10 supports 1-wire on-chip debugging via the TOOL0 pin (P40), compatible with Renesas E2 emulator and CS+ IDE. This interface enables full breakpoint, step-through, and memory inspection capabilities during development. For production units, debug functionality must be disabled via option byte configuration to prevent unintended flash wear - as Renesas explicitly warns that on-chip debug use in mass-produced devices may exceed guaranteed rewrite cycles and compromise reliability.