Renesas R5F51307ADNE#20

Overview

R5F51307ADNE#20 from Renesas Electronics is a 32-bit RX CPU-based microcontroller operating at up to 32 MHz (50 DMIPS), featuring 384 KB on-chip flash, 48 KB SRAM, 8 KB data flash, 12-bit A/D converter (17 channels), two 8-bit D/A outputs, capacitive touch sensing (24 keys), and IEC60730-compliant safety functions. It targets low-power industrial control and consumer HMI applications requiring integrated analog peripherals and robust real-time operation.

For engineers reviewing the R5F51307ADNE#20 datasheet, R5F51307ADNE#20 pinout, R5F51307ADNE#20 application, or R5F51307ADNE#20 equivalent, this page delivers verified technical context, package-specific pin mapping, functional alternatives, and supply-ready procurement details - all aligned to the HWQFN-48 (PWQN0048KB-A) variant with –40°C to +85°C operation.

Technical Context

The R5F51307ADNE#20 implements the RXv1 core with CISC Harvard architecture, 5-stage pipeline, and variable-length instructions, enabling single-cycle 32×32-bit multiplication and 64-bit accumulator support. Its clock system integrates high-speed (32 MHz ±1%) and sub-clock (32.768 kHz) oscillators, PLL, and CAC for frequency accuracy monitoring.

Peripheral integration includes ELC for event-driven module coordination without CPU wake-up, DTC for interrupt-triggered transfers, MTU2 (6-channel 16-bit timer) with complementary PWM and phase counting, and REMC for infrared remote signal decoding - all mapped to its 48-pin HWQFN footprint with 24 usable A/D input pins and 36 CTSU-capable I/Os.

Key Specifications

Pinout & Package

Packaged in a 7 mm × 7 mm, 0.5 mm pitch HWQFN-48 (PWQN0048KB-A) with exposed thermal pad, the R5F51307ADNE#20 provides 38 general-purpose I/O pins, 17 A/D input channels, 24 CTSU sensing pins, and dedicated analog power/ground (AVCC0/AVSS0, VREFH0/VREFL0) routed to minimize noise coupling.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F51307ADNE#20, R5F51307ADFL#30 trades thermal efficiency for assembly compatibility, while R5F51305ADNE#U0 reduces memory and cost at the expense of firmware headroom - both retain identical peripheral functionality and safety features for drop-in replacement in non-thermal-critical or memory-light use cases.

Availability

R5F51307ADNE#20 is available at Aetrix Electronics and suitable for industrial HMI, smart appliance control, battery-powered sensor nodes, and medical front-end designs requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for R5F51307ADNE#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 specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RX130 Group is designed for cost-sensitive, low-power embedded applications demanding integrated analog peripherals, capacitive touch, and functional safety - targeting home appliances, industrial controls, and portable medical devices.

FAQ

What is the maximum operating frequency of the R5F51307ADNE#20 and what supply voltage is required?

The R5F51307ADNE#20 operates at a maximum frequency of 32 MHz, which requires a VCC supply of 2.7 V to 5.5 V. At 2.4 V to 2.7 V, the max frequency is 16 MHz; at 1.8 V to 2.4 V, it is limited to 8 MHz. This voltage-frequency scaling ensures reliable operation across wide input ranges while minimizing dynamic power consumption in the R5F51307ADNE#20.

How many capacitive touch keys does the R5F51307ADNE#20 support, and why is that number lower than other RX130 variants?

The R5F51307ADNE#20 supports up to 24 capacitive touch keys in self-capacitance mode, constrained by its 48-pin HWQFN package (PWQN0048KB-A), which allocates fewer GPIOs to CTSU compared to 64- or 100-pin variants. This is explicitly confirmed in Table 1.2 of the datasheet, where 48-pin packages list "24 channels" for CTSU - a fixed hardware limitation of the R5F51307ADNE#20 pinout.

Does the R5F51307ADNE#20 include hardware support for IEC60730 Class B compliance?

Yes, the R5F51307ADNE#20 integrates dedicated hardware features for IEC60730 Class B compliance, including A/D self-diagnostic and analog input disconnection detection, clock frequency accuracy measurement (CAC), independent watchdog timer (IWDT) with dedicated oscillator, RAM test assistance via DOC, and ROM checksum calculation. These are documented in the "Useful functions for IEC60730 compliance" section of the R5F51307ADNE#20 datasheet.

What communication interfaces are available on the R5F51307ADNE#20, and how many SCI channels does it support?

The R5F51307ADNE#20 provides SCIg (3 channels: SCI1, SCI5, SCI6), SCIh (1 channel: SCI12), RIIC (1 channel, up to 400 kbps), and RSPI (1 channel, up to 16 Mbps). It does not include the full 6-channel SCIg set found in 100-pin RX130 variants - the 48-pin HWQFN package limits SCIg to three channels, as confirmed in Table 1.2 of the R5F51307ADNE#20 datasheet.

What is the purpose of the TSCAP pin on the R5F51307ADNE#20, and how must it be connected?

The TSCAP pin on the R5F51307ADNE#20 is a dedicated decoupling node for the internal CTSU voltage regulator and must be connected to VSS via a 10 nF ceramic capacitor, placed as close as possible to the pin. This connection stabilizes the internal analog voltage used for capacitive sensing and is mandatory for reliable CTSU operation - omission causes erratic touch response or failure in the R5F51307ADNE#20.