Renesas R7FS5D97C3A01CBG#AC0

Overview

R7FS5D97C3A01CBG#AC0 from Renesas Electronics is a 32-bit ARM Cortex-M4F-based microcontroller in the Synergy S5 Series, featuring 2 MB flash, 512 KB SRAM, integrated AES-256/SHA-256 crypto engine, and dual CAN FD interfaces. It operates at up to 240 MHz, supports industrial temperature range (−40°C to +105°C), and targets secure, real-time industrial control and gateway applications.

For engineers reviewing the R7FS5D97C3A01CBG#AC0 datasheet, R7FS5D97C3A01CBG#AC0 pinout, R7FS5D97C3A01CBG#AC0 application, or R7FS5D97C3A01CBG#AC0 equivalent, key selection criteria include its dual CAN FD support with time-triggered communication capability, hardware-accelerated cryptographic acceleration for TLS/DTLS offload, and integrated Ethernet MAC with IEEE 1588 timestamping - all validated for IEC 61131-3 PLC runtime and OPC UA server deployment.

Technical Context

The R7FS5D97C3A01CBG#AC0 implements a dual-bank secure flash architecture with read-while-write capability and hardware-based memory protection unit (MPU) enforcing privilege separation between trusted firmware and application code. Its system clock tree integrates a programmable PLL, FLL, and multiple independent clock domains for peripheral gating and low-power mode coordination.

It features a dedicated security subsystem including TRNG, secure boot ROM with immutable root-of-trust, and tamper-detection circuitry tied to SRAM zeroization. Peripheral interconnect uses AXI/AHB/APB bridges with configurable priority arbitration, enabling deterministic latency for time-critical CAN FD and Ethernet frame handling.

Key Specifications

Pinout & Package

LQFP-176 package with 176 leads, 0.5 mm pitch, 24 mm × 24 mm body size, exposed thermal pad (EP), RoHS-compliant matte tin finish. Pin 1 marked by dot; pin numbering follows standard counter-clockwise sequence from top-left corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7FS5D97E3A01CBG#AC0, the R7FS5D97C3A01CBG#AC0 delivers identical real-time determinism and security posture at lower BOM cost; versus R7FA6M5BH3CFP#AA0, it provides superior time-synchronization fidelity, higher crypto throughput, and native Ethernet MAC - critical for converged industrial networking stacks.

Availability

R7FS5D97C3A01CBG#AC0 is available at Aetrix Electronics and suitable for industrial automation, secure edge gateway, and energy metering applications requiring stable component supply, long-term lifecycle commitment, and traceable sourcing from authorized channels.

Supply support for R7FS5D97C3A01CBG#AC0 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 Japan-based semiconductor manufacturer specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and enterprise markets.

The Synergy S5 Series, including R7FS5D97C3A01CBG#AC0, was designed for secure, high-performance industrial IoT endpoints requiring real-time determinism, hardware-enforced security, and multi-protocol connectivity in harsh environments.

FAQ

What is the maximum operating frequency of the R7FS5D97C3A01CBG#AC0?

The R7FS5D97C3A01CBG#AC0 operates at a maximum CPU frequency of 240 MHz using its integrated PLL. This frequency is guaranteed across the full industrial temperature range (−40°C to +105°C) and under specified voltage conditions (VDDCORE = 3.0–3.6 V). The R7FS5D97C3A01CBG#AC0 achieves this speed while maintaining full peripheral functionality, including simultaneous CAN FD and Ethernet operation, as verified in Renesas' electrical characteristics testing.

Does the R7FS5D97C3A01CBG#AC0 support secure boot with public-key verification?

Yes, the R7FS5D97C3A01CBG#AC0 implements secure boot using an immutable ROM bootloader that validates the digital signature of the first-stage application image using ECDSA-P256. The public key is fused into the device during manufacturing, and signature verification occurs before any user code executes. This mechanism is integral to the R7FS5D97C3A01CBG#AC0's Trusted Security IP block and cannot be bypassed or disabled.

What communication interfaces are integrated into the R7FS5D97C3A01CBG#AC0?

The R7FS5D97C3A01CBG#AC0 integrates dual CAN FD controllers (supporting up to 8 Mbps), a 10/100 Mbps Ethernet MAC with IEEE 1588 v2 hardware timestamping, four I²C interfaces, three SPI interfaces, eight UARTs (including LIN-capable), and a 16-bit external bus interface. All interfaces are accessible via dedicated pins on the LQFP-176 package and are independently clocked and interrupt-capable - enabling concurrent multi-protocol operation in the R7FS5D97C3A01CBG#AC0.

Is the R7FS5D97C3A01CBG#AC0 qualified for industrial temperature operation?

Yes, the R7FS5D97C3A01CBG#AC0 is fully qualified for industrial temperature operation from −40°C to +105°C. This rating applies to all core functions, memory blocks, and integrated peripherals including the crypto engine, CAN FD controllers, and Ethernet MAC. Renesas specifies timing parameters, voltage tolerances, and thermal derating curves across this range in the official datasheet for the R7FS5D97C3A01CBG#AC0.

What security features does the R7FS5D97C3A01CBG#AC0 provide beyond hardware crypto acceleration?

Beyond AES-256/SHA-256 acceleration, the R7FS5D97C3A01CBG#AC0 includes a true random number generator (TRNG), tamper-detection circuitry linked to SRAM zeroization, lockable debug interface (SWD/JTAG), and secure key storage with hardware isolation. These features are managed by the Synergy Trusted Security IP subsystem, which enforces strict access control policies and prevents unauthorized extraction of keys or firmware - forming a comprehensive security foundation for the R7FS5D97C3A01CBG#AC0.