Renesas R5F10KBCGNA#20

Overview

R5F10KBCGNA#20 from Renesas Electronics is a 32-pin, industrial-grade (−40°C to +105°C) 16-bit RL78/G1C microcontroller with integrated USB function controller only (no host mode), 32 KB flash, 2 KB data flash, 5.5 KB RAM, and ultra-low-power operation down to 0.57 µA in Halt mode (RTC + LVD). It delivers 31 DMIPS at 24 MHz and targets USB-powered embedded control applications such as smart sensors and portable medical devices.

For engineers reviewing the R5F10KBCGNA#20 datasheet, R5F10KBCGNA#20 pinout, R5F10KBCGNA#20 application, or R5F10KBCGNA#20 equivalent, key selection criteria include its USB function-only capability, HWQFN-32 (5 × 5 mm) package, 2.4–5.5 V single-supply operation, 9-channel 8/10-bit ADC, and support for I²C, UART, and CSI interfaces in resource-constrained industrial designs.

Technical Context

The R5F10KBCGNA#20 implements the RL78 16-bit CISC Harvard architecture with 3-stage pipeline, enabling 86% of instructions in 1–2 clock cycles. Its USB subsystem complies with USB 2.0 full-speed (12 Mbps) and low-speed (1.5 Mbps) specifications and supports Battery Charging Specification Rev. 1.2 and Apple MFi 2.1A/1.0A charging modes - though MFi licensing is required for Apple compliance.

Power management includes multiple low-power modes: Stop (0.23 µA RAM-retained), Halt (0.57 µA RTC+LVD), and operating current of 71 µA/MHz. The high-speed on-chip oscillator provides ±1% accuracy from 2.4 V to 5.5 V and −20°C to +85°C, while the 12-bit interval timer, watchdog, and real-time clock (with calendar/alarm) enable precise timing in battery-operated systems.

Key Specifications

Pinout & Package

Package: 32-pin HWQFN (5 × 5 mm, 0.5 mm pitch), exposed die pad recommended to be connected to VSS.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar USB function controller applications.

Compared with R5F10JBCGNA#20, the R5F10KBCGNA#20 reduces pin count and BOM cost by omitting host-mode USB circuitry, while maintaining identical low-power performance and industrial temperature range; versus RL78/G1D, it trades RF capability for lower system cost and simpler certification in pure USB-peripheral use cases.

Availability

R5F10KBCGNA#20 is available at Aetrix Electronics and suitable for USB-powered smart sensors, industrial data loggers, and portable medical diagnostic tools requiring stable component supply, long-term lifecycle support, and guaranteed industrial-temperature operation.

Supply support for R5F10KBCGNA#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 microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/G1C product line is designed specifically for ultra-low-power USB-peripheral applications in consumer and industrial equipment, emphasizing energy efficiency, integrated analog, and simplified USB implementation without host-mode overhead.

FAQ

What USB speed modes does the R5F10KBCGNA#20 support?

The R5F10KBCGNA#20 supports USB 2.0 full-speed (12 Mbps) and low-speed (1.5 Mbps) operation as a function-only device. It does not support high-speed (480 Mbps) or USB host mode. Full-speed mode is used for data-intensive applications like CDC or mass storage, while low-speed mode suits simple HID devices such as keyboards or sensors with minimal bandwidth needs. All USB signaling complies with the USB 2.0 specification and Battery Charging Specification Rev. 1.2.

Does the R5F10KBCGNA#20 include an internal voltage reference for the ADC?

Yes, the R5F10KBCGNA#20 includes an internal 1.45 V voltage reference for the 8/10-bit ADC, which can be selected as AVREF(+) instead of AVREFP or VDD. This reference is factory-trimmed and stable across temperature and supply voltage, enabling accurate analog measurements without external precision references. The ADC also supports up to 9 input channels, including ANI0–ANI4, ANI16–ANI19, with 2.1 µs minimum conversion time.

What is the lowest power consumption mode supported by the R5F10KBCGNA#20?

The lowest power consumption mode for the R5F10KBCGNA#20 is Halt mode with RTC + LVD enabled, drawing just 0.57 µA at VDD = 2.4 V and TA = 25°C. In this mode, the CPU and most peripherals are stopped, but the real-time clock continues running with calendar and alarm functions, and the low-voltage detector remains active for brown-out protection. This makes the R5F10KBCGNA#20 ideal for battery-backed monitoring applications requiring years of operation on a single coin cell.

Can the R5F10KBCGNA#20 operate across the full industrial temperature range?

Yes, the R5F10KBCGNA#20 is rated for operation from −40°C to +105°C, as indicated by the "G" suffix in its part number. This industrial temperature grade is validated per Renesas' electrical specifications and ensures reliable performance in demanding environments such as factory automation controllers, outdoor instrumentation, and under-hood automotive modules. All key parameters-including flash endurance, ADC accuracy, and USB timing-are guaranteed across this full range.

How many general-purpose I/O pins does the R5F10KBCGNA#20 provide in its 32-pin HWQFN package?

The R5F10KBCGNA#20 provides 22 general-purpose I/O pins in its 32-pin HWQFN package. These include 16 CMOS I/Os (5 with N-ch open-drain capability), 3 CMOS inputs, and 3 N-ch open-drain I/Os rated to 6 V. All GPIOs are 5 V tolerant, simplifying interface with legacy 5 V peripherals. Pin functions are configurable via the Peripheral I/O Redirection Register (PIOR), allowing flexible assignment of serial, timer, and analog functions to available pins.