Texas Instruments TMS5703135CZWTQQ1

Overview

TMS5703135CZWTQQ1 from Texas Instruments is an automotive-grade 32-bit RISC flash microcontroller with dual lockstep ARM Cortex-R4F CPUs, 3MB ECC-protected flash, 256KB ECC RAM, and integrated safety features including BIST, parity-protected peripherals, and error signaling for ASIL-D systems. It targets real-time control in braking, electric power steering, and battery management.

For engineers reviewing the TMS5703135CZWTQQ1 datasheet, TMS5703135CZWTQQ1 pinout, TMS5703135CZWTQQ1 application, or TMS5703135CZWTQQ1 equivalent, key selection criteria include functional safety certification (ISO 26262), dual-CPU lockstep execution integrity, FlexRay + triple CAN communication support, and N2HET timer resolution for deterministic actuator control.

Technical Context

The TMS5703135CZWTQQ1 implements a dual-core lockstep architecture where both Cortex-R4F CPUs execute identical instructions and compare results at each cycle to detect transient faults. Its safety subsystem includes built-in self-test (BIST) for CPU and SRAM, ECC on flash and RAM, and parity protection across all peripheral memories including MibADC buffers and N2HET RAM.

Timing and communication are managed via two independent PLLs: an FMPLL for core/system clocks up to 180 MHz and a non-modulating PLL dedicated to FlexRay. The device integrates three DCAN controllers compliant with CAN 2.0B (up to 1 Mbps), a dual-channel FlexRay controller with FTU DMA, and two 12-bit MibADCs with 24 total channels and 64-word parity-protected result buffers each.

Key Specifications

Pinout & Package

Package: 337-ball NFBGA (ZWT), 16.0 mm × 16.0 mm, green RoHS-compliant package with 0.8 mm ball pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TMS5703135CZWTQQ1, TMS570LS2135ZWT offers identical safety architecture and peripheral compatibility at reduced flash capacity, while SPC574K72E5 provides AUTOSAR-ready software support and Ethernet but requires re-architecting for non-FlexRay networks.

Availability

TMS5703135CZWTQQ1 is available at Aetrix Electronics and suitable for automotive braking systems, electric power steering units, and battery management systems requiring stable component supply across extended production lifecycles.

Supply support for TMS5703135CZWTQQ1 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for automotive, industrial, and personal electronics markets.

The TMS570 Hercules™ family is designed specifically for ASIL-D and SIL3 safety-critical applications, integrating hardware safety mechanisms, certified development tools, and comprehensive documentation to accelerate ISO 26262 and IEC 61508 compliance.

FAQ

What safety certifications apply to the TMS5703135CZWTQQ1?

The TMS5703135CZWTQQ1 is qualified for automotive applications per AEC-Q100 Grade 1 and supports ISO 26262 ASIL-D system-level implementation. Texas Instruments provides a complete safety manual, FMEDA reports, and diagnostic software libraries for TMS5703135CZWTQQ1 to enable certified functional safety development. All safety mechanisms-including lockstep CPU, ECC, BIST, and ESM-are documented and validated for use in safety-critical automotive control units.

Does the TMS5703135CZWTQQ1 support FlexRay communication out of the box?

Yes, the TMS5703135CZWTQQ1 integrates a dual-channel FlexRay controller compliant with FlexRay v2.1, including dedicated message RAM (8KB), FTU for autonomous DMA transfers, and built-in protocol timing logic. No external transceivers are required for physical layer interfacing-only standard FlexRay level-shifting transceivers (e.g., TJA1080) must be added externally. The TMS5703135CZWTQQ1 FlexRay module supports static and dynamic segment configuration with guaranteed deterministic latency.

How does the N2HET timer subsystem enhance real-time control in the TMS5703135CZWTQQ1?

The TMS5703135CZWTQQ1 includes two N2HET modules (N2HET1 with 32 channels, N2HET2 with 18 channels) that operate independently of the CPU to deliver deterministic timing for PWM generation, input capture, and GPIO control. Each N2HET has its own instruction RAM, hardware angle generator, and dedicated HTU with MPU-enabling sub-microsecond jitter-free pulse generation and sensor timestamping without CPU intervention. This offloads timing-critical tasks from the Cortex-R4F cores, preserving CPU bandwidth for safety logic in TMS5703135CZWTQQ1 applications.

What is the role of the Error Signaling Module (ESM) in the TMS5703135CZWTQQ1?

The Error Signaling Module (ESM) in the TMS5703135CZWTQQ1 continuously monitors internal fault sources-including CPU exceptions, memory errors (ECC failures, parity errors), clock/voltage monitor violations, and peripheral timeouts-and triggers either an interrupt or assertion of the dedicated nERROR pin. This allows external safety controllers or watchdog circuits to initiate fail-safe transitions (e.g., de-energizing actuators) within microseconds. The ESM is integral to the TMS5703135CZWTQQ1's ASIL-D architecture and cannot be disabled in safety-critical configurations.

Can the TMS5703135CZWTQQ1 interface directly with external SDRAM?

Yes, the TMS5703135CZWTQQ1 includes a 16-bit External Memory Interface (EMIF) supporting synchronous DRAM (SDRAM), asynchronous SRAM, NOR flash, and FPGA peripherals. It provides EMIF_CLK, EMIF_CKE, EMIF_nRAS/nCAS, and 16-bit data/address buses with programmable timing parameters. The EMIF operates in burst mode with configurable wait states and supports auto-refresh for SDRAM. This capability enables expansion beyond on-chip memory in complex TMS5703135CZWTQQ1-based systems such as advanced driver assistance platforms requiring large frame buffers or logging memory.