Renesas R5F140GLAFB#30

Overview

R5F140GLAFB#30 from Renesas is a 48-pin LFQFP, 512 KB flash, 32 KB RAM, industrial-grade RL78/G13A microcontroller operating from 1.6–5.5 V at –40 to +105°C ambient. It delivers ultra-low power consumption (47 µA/MHz typ.), integrates 12-channel 8/10-bit ADC, 8-channel 16-bit timer, real-time clock with calendar, and supports LIN-bus via UART2.

For engineers reviewing the R5F140GLAFB#30 datasheet, R5F140GLAFB#30 pinout, R5F140GLAFB#30 application, or R5F140GLAFB#30 equivalent, key selection criteria include industrial temperature support, on-chip debug capability, self-programming flash with boot swap, background data flash rewrite (BGO), and 48-pin LFQFP package compatibility for space-constrained embedded control designs.

Technical Context

The R5F140GLAFB#30 implements the RL78 CPU core with CISC architecture and 3-stage pipeline, enabling minimum instruction execution time of 0.03125 µs at 32 MHz (high-speed on-chip oscillator) or 30.5 µs at 32.768 kHz (subsystem clock). It features dual power domains (VDD/EVDD0, VSS/EVSS0) and supports peripheral I/O redirection via PIOR register for flexible pin assignment.

Its timing subsystem includes a high-accuracy ±1.0% on-chip oscillator (1–32 MHz), 32.768 kHz crystal-based subsystem clock, and dedicated low-speed on-chip oscillator (15 kHz typ.) for watchdog operation. The device supports HALT, STOP, and SNOOZE low-power modes with guaranteed operation up to +105°C - a key differentiator from standard RL78/G13 variants.

Key Specifications

Pinout & Package

Package: 48-pin LFQFP (7 × 7 mm, 0.5-mm pitch), RoHS-compliant, moisture sensitivity level (MSL) 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F140GKAFB#30, the R5F140GLAFB#30 provides 128 KB more flash and 8 KB more RAM for complex control algorithms and data logging; compared with R5F140LLAFB#30, it trades 16 extra pins and 2 additional I²C/UART channels for a 29% smaller footprint and lower assembly cost in space-constrained industrial modules.

Availability

R5F140GLAFB#30 is available at Aetrix Electronics and suitable for industrial motor control, smart HVAC systems, and programmable logic relays requiring stable component supply across extended product lifecycles.

Supply support for R5F140GLAFB#30 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 is a global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and enterprise applications.

The RL78/G13A product line targets cost-sensitive, ultra-low-power industrial control applications - designed to replace legacy 8-bit MCUs while delivering 16-bit performance, robust peripheral integration, and extended temperature reliability without external support components.

FAQ

What is the maximum operating frequency and voltage range supported by the R5F140GLAFB#30?

The R5F140GLAFB#30 operates at up to 32 MHz using its high-speed on-chip oscillator (±1.0% accuracy) and supports a single power supply range of 1.6 V to 5.5 V. At 32 MHz, minimum instruction execution time is 0.03125 µs. The device maintains full functionality across its industrial temperature range of –40°C to +105°C under these conditions, with no voltage derating required.

Does the R5F140GLAFB#30 support LIN bus communication, and how is it implemented?

Yes, the R5F140GLAFB#30 supports LIN bus communication through UART2, which includes dedicated LINSEL pin control and automatic LIN header detection. The UART2 module handles both master and slave LIN protocol layers in hardware, eliminating software overhead. This capability is confirmed in the RL78/G13A datasheet section 1.1 Features and functional block diagram for 48-pin products.

How does the R5F140GLAFB#30 handle data flash rewriting during active program execution?

The R5F140GLAFB#30 supports Background Operation (BGO) for data flash memory, allowing the CPU to execute instructions from code flash while simultaneously rewriting the 8 KB data flash. This enables real-time firmware parameter updates, calibration storage, or secure key management without interrupting control loops or requiring STOP mode entry.

What are the key differences between the R5F140GLAFB#30 and the standard RL78/G13 family members?

The R5F140GLAFB#30 belongs to the RL78/G13A subfamily, distinguished by over 40% lower operating current (47 µA/MHz typ.), guaranteed operation up to +105°C (even with 512 KB flash), and enhanced low-power modes including SNOOZE. Standard RL78/G13 devices with 512 KB flash are only rated to +85°C and consume significantly more current at equivalent frequencies.

Can the R5F140GLAFB#30 be used with external crystal oscillators, and what are the supported configurations?

Yes, the R5F140GLAFB#30 supports external crystal oscillators on both main and subsystem clocks: X1/X2 pins accept 1–20 MHz crystals for the main system clock, while XT1/XT2 pins support 32.768 kHz crystals for the subsystem clock. These configurations enable precise timing for RTC, communication baud rates, and synchronous peripheral operation independent of the on-chip oscillator.