Renesas R5F102A9GSP#50

Overview

R5F102A9GSP#50 from Renesas is a 30-pin LSSOP packaged 16-bit RL78/G12 microcontroller with 16 KB code flash, 2 KB data flash, 2 KB RAM, and ultra-low-power operation (63 μA/MHz) across 1.8–5.5 V supply. It integrates an 8-channel 16-bit timer (TAU), 8-channel 10-bit A/D converter, UART0/CSI00/IICA0 serial interfaces, and operates from –40°C to +105°C for industrial motor control and sensor node applications.

For engineers reviewing the R5F102A9GSP#50 datasheet, R5F102A9GSP#50 pinout, R5F102A9GSP#50 application, or R5F102A9GSP#50 equivalent, key selection criteria include its G-grade temperature rating, on-chip data flash for firmware updates, DMA support for memory transfers, CRC hardware acceleration, and 30-pin LSSOP package with REGC regulator capacitor pin.

Technical Context

The R5F102A9GSP#50 implements the RL78 CPU core with 3-stage pipeline CISC architecture, supporting instruction execution times from 0.04167 µs (@24 MHz high-speed on-chip oscillator) to 1 µs (@1 MHz). Its clock system combines a ±1.0% accurate 1–24 MHz high-speed on-chip oscillator with external crystal (X1/X2) support up to 20 MHz in HS mode.

It features dual power domains: a voltage regulator controlled via REGC pin (requiring 0.47–1 µF capacitor to VSS), and dedicated low-speed on-chip oscillator (15 kHz) for watchdog and interval timing. Peripheral I/O redirection (PIOR) enables flexible pin function assignment across its 26 I/O pins, including 9 N-ch open-drain outputs with VDD tolerance.

Key Specifications

Pinout & Package

Package: 30-pin plastic LSSOP (7.62 mm, 0.65-mm pitch), JEDEC MS-012AC compliant, with exposed pad not present. Requires REGC pin connected to VSS via 0.47–1 µF capacitor for internal voltage regulation stability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F102A9GSP#50, the R5F102AAASP#V0 sacrifices extended temperature capability for lower cost, while the R5F103A9GSP#50 removes data flash, DMA, and CRC-making it unsuitable for applications requiring field firmware updates, memory-mapped peripheral transfers, or safety-critical data integrity checks.

Availability

R5F102A9GSP#50 is available at Aetrix Electronics and suitable for industrial motor control, smart metering, battery-powered sensor nodes, and factory automation I/O modules requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for R5F102A9GSP#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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power management ICs for automotive, industrial, and IoT markets.

The RL78/G12 product line delivers ultra-low-power 16-bit MCUs optimized for cost-sensitive industrial and consumer applications requiring robust peripheral integration, data retention, and extended temperature operation.

FAQ

What is the maximum operating frequency of the R5F102A9GSP#50?

The R5F102A9GSP#50 supports a maximum high-speed on-chip oscillator frequency of 24 MHz, delivering 31 DMIPS performance. When using an external crystal (X1/X2), the main system clock operates up to 20 MHz in HS mode. Instruction execution time ranges from 0.04167 µs (24 MHz) to 1 µs (1 MHz), configurable per application requirements.

Does the R5F102A9GSP#50 include on-chip data flash memory?

Yes, the R5F102A9GSP#50 includes 2 KB of on-chip data flash memory with background operation (BGO) capability, allowing program execution from code flash while simultaneously rewriting data flash. It supports 1,000,000 write/erase cycles at VDD = 1.8–5.5 V and enables firmware parameter storage, calibration data logging, and over-the-air update staging.

What is the purpose of the REGC pin on the R5F102A9GSP#50?

The REGC pin on the R5F102A9GSP#50 connects to an external 0.47–1 µF capacitor tied to VSS to stabilize the internal voltage regulator. This capacitor is mandatory for reliable operation-it ensures clean internal LDO output, maintains ADC reference accuracy, and prevents reset instability under dynamic load conditions across the full –40°C to +105°C temperature range.

How many I/O pins does the R5F102A9GSP#50 provide, and what types are supported?

The R5F102A9GSP#50 provides 26 total I/O pins in its 30-pin LSSOP package. It supports 9 N-ch open-drain outputs (VDD-tolerant), configurable TTL input buffers, and on-chip pull-up resistors. Pin functions-including analog inputs (ANI0–ANI3, ANI16–ANI19), key return (KR0–KR9), and peripheral I/O-are dynamically assignable via the Peripheral I/O Redirection Register (PIOR).

Is the R5F102A9GSP#50 qualified for industrial temperature operation?

Yes, the R5F102A9GSP#50 is G-grade qualified for industrial operation from –40°C to +105°C. This rating is explicitly encoded in the part number suffix "GSP", confirming suitability for demanding environments such as motor drives, factory automation equipment, and outdoor metering systems where ambient temperatures exceed +85°C.