Renesas R7FA2E1A52DDA#HC0

Overview

R7FA2E1A52DDA#HC0 from Renesas is an ultra-low-power 32-bit Arm® Cortex®-M23 microcontroller operating at up to 48 MHz, featuring 32-KB code flash, 16-KB SRAM, a 12-bit ADC, capacitive touch sensing (CTSU2), and integrated AES-128/256 encryption - deployed in battery-powered HMI interfaces and industrial sensor nodes.

For engineers reviewing the R7FA2E1A52DDA#HC0 datasheet, R7FA2E1A52DDA#HC0 pinout, R7FA2E1A52DDA#HC0 application, or R7FA2E1A52DDA#HC0 equivalent, key selection criteria include its WLCSP-25 package, -40°C to +85°C temperature grade, 20 GPIOs with 14 N-ch open-drain outputs, and support for CTSU2-based touch control without external components.

Technical Context

The R7FA2E1A52DDA#HC0 implements the Armv8-M architecture with Memory Protection Unit (MPU) and CoreSight™ MTB-M23 trace, enabling secure, deterministic real-time operation. It integrates dual watchdog timers (WDT/IWDT), SRAM parity checking, and Clock Frequency Accuracy Measurement Circuit (CAC) for functional safety compliance in IEC 61508 SIL-2–capable designs.

Its analog subsystem includes a 12-bit ADC with 8 input channels, two low-power analog comparators (ACMPLP), and an on-die temperature sensor (TSN), all referenced to dedicated AVCC0/AVSS0 rails. The CTSU2 unit supports up to 10 touch channels with built-in noise immunity and auto-calibration, optimized for direct electrode connection in space-constrained WLCSP layouts.

Key Specifications

Pinout & Package

Package: 25-pin Wafer-Level Chip Scale Package (WLCSP), 2.14 mm × 2.27 mm, 0.4 mm pitch, Pb-free Sn termination, exposed die pad recommended to be connected to VSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7FA2E1A52DFL and R7FA2E1A52DNH, the R7FA2E1A52DDA#HC0 delivers the smallest footprint (2.14 mm × 2.27 mm) and lowest assembly cost for ultra-compact touch HMI, while trading off I/O count and ADC channel count for size and power efficiency.

Availability

R7FA2E1A52DDA#HC0 is available at Aetrix Electronics and suitable for smart home remotes, medical wearables, industrial sensor nodes, and consumer appliance control panels requiring stable component supply and long-term manufacturability.

Supply support for R7FA2E1A52DDA#HC0 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 design innovation since 1959, with expertise in microcontrollers, analog, power, and connectivity solutions.

The RA2E1 group, including R7FA2E1A52DDA#HC0, was designed specifically for cost-sensitive, ultra-low-power applications requiring integrated security, capacitive touch, and functional safety - targeting battery-powered edge devices in consumer and industrial markets.

FAQ

What is the maximum operating frequency of the R7FA2E1A52DDA#HC0?

The R7FA2E1A52DDA#HC0 features an Arm Cortex-M23 core with a maximum operating frequency of 48 MHz. This speed is achievable across the full industrial temperature range (-40°C to +85°C) and supply voltage (1.6 V to 5.5 V), supported by the high-speed on-chip oscillator (HOCO) with ±2% trimmable accuracy. The R7FA2E1A52DDA#HC0 maintains timing integrity under dynamic voltage scaling thanks to its integrated clock frequency accuracy measurement circuit (CAC).

Does the R7FA2E1A52DDA#HC0 support hardware encryption?

Yes, the R7FA2E1A52DDA#HC0 integrates a dedicated hardware AES-128 and AES-256 encryption engine plus a True Random Number Generator (TRNG). These modules operate independently of the CPU, enabling secure boot verification, encrypted firmware updates, and protected data-at-rest storage without performance penalty. The R7FA2E1A52DDA#HC0's TRNG meets NIST SP 800-90B entropy requirements, and AES keys are stored in protected memory regions enforced by the MPU.

How many capacitive touch channels does the R7FA2E1A52DDA#HC0 support?

The R7FA2E1A52DDA#HC0 supports up to 10 capacitive touch sensing channels via its integrated CTSU2 peripheral. These channels map to dedicated pins (TS00, TS02–TS07, TS08–TS16-CFC, etc.) and provide automatic noise cancellation, baseline tracking, and sensitivity adjustment - all configurable in firmware. Unlike external touch controllers, the CTSU2 in the R7FA2E1A52DDA#HC0 requires no external components and consumes less than 10 µA during active scan, making it ideal for battery-powered interfaces.

What package type and dimensions does the R7FA2E1A52DDA#HC0 use?

The R7FA2E1A52DDA#HC0 uses a 25-pin Wafer-Level Chip Scale Package (WLCSP) measuring 2.14 mm × 2.27 mm with 0.4 mm pitch and Sn-only Pb-free termination. Its ultra-compact size and bottom-side solder balls enable direct mounting on dense PCBs with minimal interconnect inductance. The exposed die pad is recommended to connect to VSS for thermal and electrical stability, and the package is qualified for standard reflow profiles per J-STD-020.

Can the R7FA2E1A52DDA#HC0 operate from a single 3.3-V supply?

Yes, the R7FA2E1A52DDA#HC0 operates over a wide supply range of 1.6 V to 5.5 V, fully supporting 3.3-V nominal systems. At 3.3 V, it delivers full 48-MHz performance with typical active current below 4.8 mA, and its internal regulators maintain stable core and analog voltages. The device also supports dynamic voltage scaling - allowing lower VCC (e.g., 1.8 V) for ultra-low-power sleep modes while retaining SRAM retention and RTC operation.