Texas Instruments TMS5704357BGWTEP

Overview

TMS5704357BGWTEP from Texas Instruments is a radiation-tolerant, high-integrity automotive-grade ARM® Cortex®-R5F dual-core microcontroller designed for ASIL-D safety-critical systems. It operates at up to 300 MHz, integrates 4 MB ECC-protected flash and 512 KB ECC-protected RAM, and features dual-lockstep CPUs with BIST, ESM, and voltage/clock monitoring - deployed in electric power steering and brake control units.

For engineers reviewing the TMS5704357BGWTEP datasheet, TMS5704357BGWTEP pinout, TMS5704357BGWTEP application, or TMS5704357BGWTEP equivalent, key selection criteria include functional safety certification (ISO 26262 ASIL-D), dual-core lockstep integrity, on-chip ECC coverage across memory and peripherals, and support for FlexRay/CAN/Ethernet real-time communication in harsh environments.

Technical Context

The TMS5704357BGWTEP implements two ARM Cortex-R5F CPUs in hardware-enforced lockstep with 32 KB I-cache and 32 KB D-cache, both protected by ECC. Its safety architecture includes dedicated Error Signaling Module (ESM) with nERROR output, Built-In Self-Test (BIST) for CPU/N2HET/SRAM, and voltage/clock monitors that trigger fault responses within defined timing windows.

Real-time control is enabled by two N2HET coprocessors (32 channels each, 256-word parity-protected RAM), seven ePWM modules with trip-zone protection, six eCAP modules, two 12-bit MibADCs (41 total channels, 64-word parity buffers), and dual-channel FlexRay with autonomous FTU transfers - all with ECC or parity protection on associated memories.

Key Specifications

Pinout & Package

Package: 337-ball NFBGA (GWT), 16.00 mm × 16.00 mm, green RoHS-compliant package with exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TMS5704357BGWTEP, the TMS570LS1227ZWT offers reduced safety scope and memory but lower cost for less demanding ASIL-B roles, while the SPC574K72E5 provides Power Architecture ecosystem advantages in engine management but lacks FlexRay/Ethernet needed for modern rail or ADAS domain controllers.

Availability

TMS5704357BGWTEP is available at Aetrix Electronics and suitable for electric power steering, railway signaling, and battery-management systems requiring stable component supply across extended product lifecycles and extreme environmental conditions.

Supply support for TMS5704357BGWTEP 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies with decades of automotive and industrial qualification expertise.

The TMS570 Hercules™ family is engineered specifically for functional safety-critical applications, delivering ASIL-D and SIL-3 certified MCUs with integrated diagnostics, lockstep architectures, and end-to-end ECC protection across compute, memory, and I/O subsystems.

FAQ

What safety certifications apply to the TMS5704357BGWTEP?

The TMS5704357BGWTEP is qualified for ISO 26262 ASIL-D and IEC 61508 SIL-3 applications. It includes documentation packages, safety manuals, FMEDA reports, and diagnostic software libraries to support functional safety development. The TMS5704357BGWTEP device itself incorporates dual-lockstep CPUs, ECC on all memories, BIST, and ESM - enabling systematic fault mitigation required for highest automotive safety integrity levels.

Does the TMS5704357BGWTEP support external memory expansion?

Yes, the TMS5704357BGWTEP integrates a 16-bit External Memory Interface (EMIF) supporting asynchronous and synchronous memories including SRAM, NOR flash, and FPGA peripherals. It provides EMIF_ADDR[21:0], EMIF_DATA[15:0], EMIF_nCS[4:0], EMIF_nOE, EMIF_nWE, EMIF_nRAS, EMIF_nCAS, and EMIF_CLK signals - enabling direct connection to external devices without glue logic. The TMS5704357BGWTEP EMIF is fully configurable via registers and supports wait-state insertion for timing adaptation.

How does the N2HET module enhance real-time control in the TMS5704357BGWTEP?

The TMS5704357BGWTEP integrates two Next Generation High-End Timer (N2HET) modules, each with 32 programmable channels and 256-word instruction RAM protected by parity. These coprocessors execute timing-critical tasks - such as PWM generation, capture, GPIO toggling, and angle-based waveform synthesis - independently of the CPU. The TMS5704357BGWTEP uses HTU units to perform DMA-style transfers between N2HET RAM and main memory, reducing CPU load and jitter in motor control and sensor synchronization applications.

What is the role of the Parameter Overlay Module (POM) in the TMS5704357BGWTEP?

The Parameter Overlay Module (POM) in the TMS5704357BGWTEP enables runtime redirection of flash memory accesses to internal RAM or EMIF addresses. This allows engineers to update calibration parameters - such as PID gains or lookup tables - during system operation without reprogramming flash or halting execution. The TMS5704357BGWTEP POM supports real-time tuning in closed-loop control systems, significantly accelerating development and field calibration cycles while preserving flash endurance.

Can the TMS5704357BGWTEP operate in extended temperature environments?

Yes, the TMS5704357BGWTEP is rated for operation from –55°C to +125°C ambient temperature, meeting extended temperature requirements for aerospace, defense, and heavy-duty transportation applications. This rating is supported by controlled baseline manufacturing, single assembly/test/fabrication sites, and full traceability - documented in TI's enhanced product change notification and lifecycle management protocols. The TMS5704357BGWTEP maintains full functionality and ECC protection across this entire range.