Infineon Technologies CYTMA445-48LQI36AE

Overview

CYTMA445-48LQI36AE from Infineon Technologies is a TRAVEO™ T2G automotive microcontroller based on Arm® Cortex®-M4F core, operating at up to 200 MHz, featuring 4 MB embedded flash, 1.5 MB SRAM, and integrated CAN FD, Ethernet AVB, and hardware security (HSM). It targets body control modules and domain controllers requiring ASIL-B functional safety compliance.

For engineers reviewing the CYTMA445-48LQI36AE datasheet, CYTMA445-48LQI36AE pinout, CYTMA445-48LQI36AE application, or CYTMA445-48LQI36AE equivalent, key selection criteria include dual-core lockstep support, hardware cryptographic acceleration (AES-128/256, SHA-256, RSA-2048), configurable I/O with programmable pull-up/down, and AEC-Q100 Grade 2 qualification for under-hood operation.

Technical Context

This MCU implements a dual-core lockstep configuration with optional split-mode operation, supporting both ASIL-B and ASIL-D decomposition via hardware error correction (ECC) on flash and SRAM, and integrated memory protection unit (MPU) with 16 regions. It integrates a dedicated HSM with secure boot, key provisioning, and runtime attestation.

The device features a multi-layer AXI/AHB bus matrix enabling concurrent access to peripherals including 4x CAN FD controllers (with time-triggered capability), 1x 100BASE-T1 Ethernet MAC with AVB support, and 2x high-resolution PWM timers (up to 150 MHz) for motor control timing precision.

Key Specifications

Pinout & Package

Package: 144-pin LQFP (20 mm × 20 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad for automotive thermal dissipation requirements.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S32K344WAT0VLQY and TC397XP-160F300N AC, CYTMA445-48LQI36AE uniquely combines integrated Ethernet AVB MAC, certified HSM, and ASIL-B compliance in a single die-reducing BOM count and simplifying certification for body domain gateways requiring secure, time-synchronized networking.

Availability

CYTMA445-48LQI36AE is available at Aetrix Electronics and suitable for body control modules, door module controllers, roof module controllers, and smart junction boxes requiring stable component supply across automotive production lifecycles.

Supply support for CYTMA445-48LQI36AE 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

Infineon Technologies is a German semiconductor manufacturer specializing in power semiconductors, automotive MCUs, and security solutions, with global R&D and manufacturing infrastructure.

This part belongs to the TRAVEO™ T2G family, designed specifically for automotive body and domain control applications demanding functional safety, secure communication, and scalable compute performance in harsh environments.

FAQ

What is the maximum operating frequency of the CYTMA445-48LQI36AE CPU?

The CYTMA445-48LQI36AE features an Arm® Cortex®-M4F core rated for operation up to 200 MHz under full ASIL-B conditions, with dynamic voltage and frequency scaling enabled via its integrated PMU. This frequency is guaranteed across the full -40 °C to +125 °C temperature range and meets AEC-Q100 Grade 2 requirements without derating.

Does CYTMA445-48LQI36AE support secure boot with hardware root-of-trust?

Yes. The integrated Hardware Security Module (HSM) provides immutable secure boot using SHA-256 hash verification of signed firmware images stored in protected flash sectors. Boot ROM enforces signature validation before loading application code, and private keys remain inaccessible outside the HSM boundary.

Can the Ethernet interface operate without an external PHY?

No. While CYTMA445-48LQI36AE includes a full 100BASE-T1 Ethernet MAC with AVB support, it requires an external automotive-grade PHY (e.g., TJA1103 or LAN8770) for physical layer signaling. The MAC provides MII/RMII interfaces and AVB-specific registers but does not integrate PHY circuitry.

How many CAN FD interfaces does CYTMA445-48LQI36AE support, and what is their data rate capability?

CYTMA445-48LQI36AE integrates four independent CAN FD controllers supporting data rates up to 5 Mbps in FD mode and 1 Mbps in classical CAN mode. Each controller includes dedicated message RAM, hardware timestamping, and flexible bit timing configuration per channel for mixed-network topologies.