Renesas R5F103A7ASP#10

Overview

R5F103A7ASP#10 from Renesas Electronics is a 30-pin LSSOP-packaged RL78/G12 16-bit microcontroller designed for ultra-low-power general-purpose embedded control. It features 2 KB code flash, 256 B RAM, 10-bit A/D converter (8 channels), 1-channel UART, and operates from 1.8 V to 5.5 V across –40°C to +85°C ambient temperature - deployed in battery-powered sensor nodes and industrial HMI front-ends.

For engineers reviewing the R5F103A7ASP#10 datasheet, R5F103A7ASP#10 pinout, R5F103A7ASP#10 application, or R5F103A7ASP#10 equivalent, this page delivers verified package mapping (PLSP0030JB-B), confirmed peripheral count (8-channel TAU, 1 UART, no data flash), exact oscillator accuracy (±5.0% @ –40°C to +85°C), and validated alternative part selection guidance.

Technical Context

The R5F103A7ASP#10 implements the RL78 CPU core with 3-stage pipeline CISC architecture and 1 MB address space. Its timing subsystem relies on a high-speed on-chip oscillator (1–24 MHz, ±5.0% accuracy) and a dedicated 15 kHz low-speed on-chip oscillator for watchdog operation - no external crystal required for basic functionality.

Peripheral integration includes an 8-channel 16-bit timer array (TAU), 10-bit A/D converter with internal reference (1.45 V), programmable clock/buzzer output (PCLBUZ0/PCLBUZ1), and key interrupt support (INTP0–INTP5). Unlike R5F102 variants, it omits DMA, CRC, SFR/RAM guard, and data flash memory.

Key Specifications

Pinout & Package

Package: 30-pin plastic LSSOP (7.62 mm, 0.65-mm pitch), JEDEC PLSP0030JB-B footprint. Exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F103A7ASP#10, R5F102A7ASP#10 adds data retention and functional safety features at higher cost and power, while R5F103AAASP#10 scales memory without altering I/O or timing behavior - enabling seamless migration within identical hardware.

Availability

R5F103A7ASP#10 is available at Aetrix Electronics and suitable for smart sensor nodes, industrial HMI interfaces, and portable medical devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for R5F103A7ASP#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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power management ICs for automotive, industrial, and IoT markets.

The RL78/G12 product line targets cost-sensitive, ultra-low-power embedded control applications - emphasizing energy efficiency, small footprint, and rapid time-to-market for consumer and industrial equipment.

FAQ

What is the maximum operating frequency of the R5F103A7ASP#10?

The R5F103A7ASP#10 supports a maximum high-speed on-chip oscillator frequency of 24 MHz. At this speed, its minimum instruction execution time is 0.04167 μs. The device also supports external crystal oscillation up to 20 MHz (1.0–20.0 MHz range) when using X1/X2 pins, but the R5F103A7ASP#10 does not include data flash or DMA - unlike R5F102 variants - and maintains ±5.0% oscillator accuracy over –40°C to +85°C.

Does the R5F103A7ASP#10 include data flash memory?

No, the R5F103A7ASP#10 does not include data flash memory. Per Renesas documentation, all R5F103-series devices omit the 2 KB data flash found in R5F102-series counterparts. This simplifies firmware architecture for fixed-parameter applications but removes in-field parameter storage capability. The R5F103A7ASP#10 retains 2 KB of code flash with 1 KB erase blocks and supports self-programming of that code area only.

What package type and pin count does the R5F103A7ASP#10 use?

The R5F103A7ASP#10 uses a 30-pin plastic LSSOP package (7.62 mm body width, 0.65-mm lead pitch) conforming to JEDEC standard PLSP0030JB-B. It provides 26 total I/O lines including 8 analog inputs (ANI0–ANI3, ANI16–ANI19), multiple timer channels, UART, and SPI interfaces - all accessible through dedicated or configurable pins as defined in the RL78/G12 User's Manual.

Can the R5F103A7ASP#10 operate from a 1.8 V supply?

Yes, the R5F103A7ASP#10 is fully specified to operate from 1.8 V to 5.5 V. At 1.8 V, it supports low-speed main system clock operation up to 8 MHz and maintains full functionality of its 10-bit A/D converter, timers, and UART. This enables direct integration with single-cell Li-ion, Li-Po, or alkaline battery sources without external regulators - critical for compact, battery-constrained designs.

How many UART channels does the R5F103A7ASP#10 support?

The R5F103A7ASP#10 supports one dedicated UART channel (UART0) on pins P11 (RxD0) and P12 (TxD0). While the 30-pin variant's block diagram shows UART1 and UART2 capability, Renesas explicitly states in the RL78/G12 datasheet that R5F103 products implement only one UART channel - unlike R5F102Ax parts which support three. UART0 is fully functional for asynchronous serial communication at baud rates up to 1 Mbps.