Renesas R7FA0E1053CNK#HA0

Overview

R7FA0E1053CNK#HA0 from Renesas is an ultra-low-power 32-bit Arm® Cortex®-M23 microcontroller in a 24-pin HWQFN package, operating up to 32 MHz with 32-KB code flash, 12-KB SRAM, 12-bit ADC (6 input channels), and integrated safety features including SRAM parity, CRC, IWDT, and ADC self-diagnosis. It targets battery-powered industrial sensors and smart metering endpoints requiring extended runtime and functional safety compliance.

For engineers reviewing the R7FA0E1053CNK#HA0 datasheet, R7FA0E1053CNK#HA0 pinout, R7FA0E1053CNK#HA0 application, or R7FA0E1053CNK#HA0 equivalent, key selection criteria include its 24-pin HWQFN footprint, 32-MHz Cortex-M23 core, 6-channel ADC support, LIN-capable UART, and -40°C to +105°C operation - all verified against Renesas R01DS0427EJ0120 Rev.1.20.

Technical Context

The R7FA0E1053CNK#HA0 implements Armv8-M architecture with TrustZone®-enabled security extensions, supporting secure boot and memory isolation. Its system-level timing relies on multiple clock sources: HOCO (32 MHz), LOCO (32.768 kHz), and external crystal options, managed via clock trim functions for HOCO/MOCO/LOCO.

Peripheral integration includes Serial Array Unit (SAU) with 2 simplified SPI, 2 simplified I²C, and 2 UART interfaces (one LIN-bus supported), plus dedicated UARTA and IICA modules. Safety-critical execution is enforced by Independent Watchdog Timer (IWDT) running on LOCO and register write protection via PRCR.

Key Specifications

Pinout & Package

24-pin HWQFN (PWQN0024KG-A), 4 mm × 4 mm body, 0.5 mm pitch, exposed die pad (recommended electrically open). Pin 1 marked by dot; top-view pin numbering follows Figure 1.4 of R01DS0427EJ0120.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7FA0E1053CFJ and R7FA0E1053CNH, the R7FA0E1053CNK#HA0 offers the smallest footprint (24-pin HWQFN) and lowest pin count (20 GPIO), making it optimal for cost-sensitive, size-limited endpoints - at the trade-off of reduced peripheral multiplexing flexibility and no 5-V tolerant pins beyond P913/P914.

Availability

R7FA0E1053CNK#HA0 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart utility meters, home appliance controllers, and medical wearable monitors requiring stable component supply across long production lifecycles.

Supply support for R7FA0E1053CNK#HA0 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 applications.

The RA0E1 Group is designed for cost-sensitive, ultra-low-power general-purpose microcontroller applications - emphasizing energy efficiency, functional safety, and seamless scalability within the RA family architecture.

FAQ

What is the maximum operating frequency of the R7FA0E1053CNK#HA0?

The R7FA0E1053CNK#HA0 operates at a maximum frequency of 32 MHz using its Arm Cortex-M23 core. This speed is achievable with the high-speed on-chip oscillator (HOCO) or external crystal (MOSC), and is confirmed in Table 1.12 of the R01DS0427EJ0120 datasheet. The R7FA0E1053CNK#HA0 maintains this performance across its full operating temperature range of –40°C to +105°C.

How many analog input channels does the R7FA0E1053CNK#HA0 support?

The R7FA0E1053CNK#HA0 integrates a 12-bit A/D Converter (ADC12) with 6 selectable analog input channels (AN000–AN005), as specified in Table 1.12 of the R01DS0427EJ0120 datasheet. These channels support internal references (VREFH0/VREFL0) and the on-chip temperature sensor output, enabling calibrated environmental sensing without external components.

Does the R7FA0E1053CNK#HA0 include hardware-based safety features?

Yes, the R7FA0E1053CNK#HA0 includes multiple hardware safety features: SRAM parity error detection, independent watchdog timer (IWDT), cyclic redundancy check (CRC) calculator, ADC self-diagnosis, flash area protection, and illegal memory access detection. These are documented in Section 1.1 and Table 1.3 of the R01DS0427EJ0120 datasheet and support functional safety development per IEC 61508.

What package type is used for the R7FA0E1053CNK#HA0?

The R7FA0E1053CNK#HA0 uses a 24-pin HWQFN package (code NK, part number PWQN0024KG-A), measuring 4 mm × 4 mm with 0.5 mm pitch and an exposed die pad. Pin assignments are defined in Figure 1.4 and Table 1.14 of the R01DS0427EJ0120 datasheet, and the die pad should be electrically open per Renesas recommendation.

Can the R7FA0E1053CNK#HA0 support LIN bus communication?

Yes, the R7FA0E1053CNK#HA0 supports LIN bus communication through one UART channel configured for LIN protocol (ISO 17987-4), as stated in Table 1.7 and Table 1.12 of the R01DS0427EJ0120 datasheet. This eliminates the need for an external LIN transceiver in basic node implementations, reducing BOM cost and board area for the R7FA0E1053CNK#HA0.