Renesas R5F11B7EGNA#20

Overview

R5F11B7EGNA#20 from Renesas Electronics is a 24-pin, 64 KB Flash, 5.5 KB RAM RL78/G1F 16-bit microcontroller operating at up to 32 MHz with true low-power operation (66 μA/MHz active, 0.57 μA RTC+LVD), 8-channel 10-bit ADC, dual 8-bit DAC outputs, and integrated programmable gain amplifier - designed for battery-powered industrial sensor nodes and smart metering interfaces.

For engineers reviewing the R5F11B7EGNA#20 datasheet, R5F11B7EGNA#20 pinout, R5F11B7EGNA#20 application, or R5F11B7EGNA#20 equivalent, key selection criteria include its HWQFN-24 (4×4 mm, 0.5 mm pitch) package, −40 to +105°C industrial temperature grade, 1.6–5.5 V wide supply range, and support for LIN-bus UART, CSI, and simplified I²C serial interfaces in compact embedded control systems.

Technical Context

The R5F11B7EGNA#20 implements the RL78 CPU core with CISC architecture, 3-stage pipeline, and selectable instruction execution time (0.03125 μs @ 32 MHz to 30.5 μs @ 32.768 kHz). It integrates a high-accuracy ±1.0% on-chip oscillator (1–32 MHz), low-speed 15 kHz internal RC oscillator, and hardware event link controller (ELC) enabling direct peripheral-to-peripheral signal routing without CPU intervention.

Its analog subsystem includes two comparators with selectable internal/external reference, a single-channel PGA, and an 8-channel 10-bit A/D converter with internal 1.45 V reference and temperature sensor. Power management features HALT, STOP, and SNOOZE modes, on-chip POR/LVD with 14-level voltage detection, and regulator capacitor (REGC) pin for stable low-noise operation.

Key Specifications

Pinout & Package

24-pin HWQFN package (4 × 4 mm, 0.5 mm pitch) with exposed die pad; REGC requires 0.47–1 μF capacitor to VSS per datasheet requirement.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F11B7CGNA#20 and R5F11BBEGNA#20, the R5F11B7EGNA#20 uniquely balances 64 KB Flash capacity, industrial temperature rating, and minimal 24-pin footprint - making it optimal for space-constrained, long-life embedded controllers where firmware growth headroom and analog integration outweigh I/O expansion needs.

Availability

R5F11B7EGNA#20 is available at Aetrix Electronics and suitable for smart metering, industrial sensor nodes, home appliance control, and medical wearable monitors requiring stable component supply across extended product lifecycles.

Supply support for R5F11B7EGNA#20 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 trusted embedded solutions for automotive, industrial, infrastructure, and IoT markets.

The RL78/G1F product line delivers ultra-low-power 16-bit MCUs optimized for cost-sensitive, battery-operated industrial and consumer devices requiring integrated analog, LIN support, and robust flash security.

FAQ

What is the maximum operating frequency and supply voltage range for the R5F11B7EGNA#20?

The R5F11B7EGNA#20 operates at up to 32 MHz using its high-accuracy on-chip oscillator and supports a wide supply voltage range of 1.6 V to 5.5 V. This enables direct compatibility with 1.8 V, 2.5 V, 3.3 V, and 5 V system rails - critical for mixed-voltage designs like battery-powered sensor nodes interfacing with legacy 5 V transducers or modern 1.8 V radios. The device maintains full functionality across this range, including ADC accuracy and oscillator stability.

Does the R5F11B7EGNA#20 support LIN bus communication, and how is it implemented?

Yes, the R5F11B7EGNA#20 supports LIN bus communication via its UART0 channel, which is explicitly documented as LIN-bus compatible in the RL78/G1F datasheet. It uses standard UART hardware with LIN-specific features including break detection, sync field handling, and identifier filtering - all managed in hardware without CPU intervention. This allows the R5F11B7EGNA#20 to serve as a LIN slave node in automotive body electronics or industrial control networks while maintaining ultra-low power consumption in STOP mode between messages.

How many analog-to-digital converter (ADC) channels does the R5F11B7EGNA#20 provide, and what is their resolution?

The R5F11B7EGNA#20 provides 8 analog input channels with 10-bit resolution, supporting VDD-referenced conversion across the full 1.6–5.5 V supply range. It includes an internal 1.45 V reference voltage and integrated temperature sensor - enabling accurate voltage, current, and thermal measurements without external references. All 8 channels are accessible on the 24-pin HWQFN package, with dedicated pins such as P20 (AVREFP), P21 (AVREFM), and P00–P01/P10–P15 assigned as analog inputs per the pin configuration diagram.

What packaging and thermal specifications apply to the R5F11B7EGNA#20?

The R5F11B7EGNA#20 is supplied in a 24-pin plastic HWQFN package (4 × 4 mm, 0.5 mm pitch) with exposed die pad, rated for industrial operation from −40°C to +105°C. Its G-suffix confirms qualification for extended temperature environments, and the REGC pin requires a 0.47–1 μF capacitor to VSS for stable internal regulation. Thermal resistance (θ_JA) is 110°C/W typical, and the exposed pad must be soldered to PCB ground plane for optimal thermal dissipation and EMI performance.

Can the R5F11B7EGNA#20 perform background data flash writes while executing code from program memory?

Yes, the R5F11B7EGNA#20 supports Background Operation (BGO) for its 4 KB data flash memory, allowing the CPU to execute instructions from code flash while simultaneously rewriting data flash sectors. This capability enables seamless firmware updates, parameter storage, and logging without halting real-time tasks - essential for industrial controllers that must maintain uptime during field upgrades. The data flash endurance is rated at 1,000,000 write/erase cycles, with rewrite voltage supported across the full 1.8–5.5 V supply range.