Texas Instruments TMS5702135CZWTQQ1

Overview

TMS5702135CZWTQQ1 from Texas Instruments is an automotive-grade 32-bit RISC microcontroller with dual lockstep ARM Cortex-R4F CPUs, 2MB ECC-protected flash, 256KB ECC RAM, and integrated safety features including BIST, parity-protected peripherals, and error signaling for ASIL-D systems. It targets brake control, electric power steering, and battery management in harsh environments.

For engineers reviewing the TMS5702135CZWTQQ1 datasheet, TMS5702135CZWTQQ1 pinout, TMS5702135CZWTQQ1 application, or TMS5702135CZWTQQ1 equivalent, key selection criteria include dual-CPU lockstep operation, FlexRay + 3× CAN 2.0B interfaces, N2HET timing coprocessors, 2× 12-bit MibADCs (24-channel total), and 144-pin LQFP or 337-ball ZWT packaging - all qualified for -40°C to 125°C operation.

Technical Context

The TMS5702135CZWTQQ1 implements a safety-critical architecture with two identical Cortex-R4F cores executing identical instructions in lockstep, monitored by hardware comparators. Its FMPLL generates up to 180 MHz system clock, while a separate nonmodulating PLL drives FlexRay at 10 Mbps per channel.

Peripheral safety is enforced via dedicated MPUs for DMA, HTU, FTU, and N2HET modules; ECC on flash and RAM; parity on message RAM, ADC buffers, and N2HET RAM; and loopback-capable I/O for diagnostic coverage. The ESM monitors faults across CPU, memory, clocks, and voltage domains to assert the nERROR pin or trigger interrupts.

Key Specifications

Pinout & Package

The TMS5702135CZWTQQ1 is packaged in a 337-ball NFBGA (ZWT) with 16.0 mm × 16.0 mm body size and 0.8 mm ball pitch. This package supports full peripheral access, thermal dissipation for sustained 180 MHz operation, and automotive board-level reliability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TMS570LS3135ZWT, TMS5702135CZWTQQ1 reduces flash capacity without compromising safety or real-time performance - lowering cost and power while retaining full peripheral and temperature qualification. Against SPC574K72E5, it trades Ethernet/CAN FD for deterministic FlexRay and hardware-accelerated N2HET timing - making it more suitable for actuator-level control in braking and steering.

Availability

TMS5702135CZWTQQ1 is available at Aetrix Electronics and suitable for braking systems, electric power steering, and battery management systems requiring stable component supply across extended automotive lifecycles.

Supply support for TMS5702135CZWTQQ1 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 deep expertise in automotive functional safety.

The TMS570 Hercules™ family was designed specifically for ASIL-D and SIL-3 safety-critical applications - combining lockstep CPUs, memory protection, and diagnostic accelerators to simplify ISO 26262 and IEC 61508 certification.

FAQ

What safety certifications does the TMS5702135CZWTQQ1 support?

The TMS5702135CZWTQQ1 is architected to support ISO 26262 ASIL-D and IEC 61508 SIL-3 compliance. Its dual lockstep Cortex-R4F CPUs, ECC memory, BIST logic, parity-protected peripherals, and ESM with nERROR pin provide the hardware foundation required for certification. TI supplies safety manuals, FMEDA reports, and diagnostic software libraries to accelerate qualification - all documented in the TMS570LS21x5 Functional Safety Documentation Package. TMS5702135CZWTQQ1 itself is not pre-certified, but its design enables end-system certification.

Does the TMS5702135CZWTQQ1 include hardware support for FlexRay communication?

Yes, the TMS5702135CZWTQQ1 integrates a dual-channel FlexRay controller compliant with FlexRay v2.1, supporting 10 Mbps per channel with time-triggered scheduling. It includes a dedicated FlexRay Transfer Unit (FTU) that autonomously moves message data between FlexRay buffers and main memory without CPU intervention. The FTU is protected by a dedicated MPU, and the controller supports both static and dynamic segments - essential for deterministic communication in advanced driver assistance systems. TMS5702135CZWTQQ1 uses this capability for safety-critical chassis control networks.

How many ADC channels does the TMS5702135CZWTQQ1 support, and what resolution is available?

The TMS5702135CZWTQQ1 integrates two 12-bit Multibuffered ADC (MibADC) modules: ADC1 with 24 dedicated input channels and ADC2 with 16 channels shared with ADC1, for a total of 24 unique analog inputs. Each module has 64-word result buffers with parity protection. A 10-bit mode is also supported for faster conversions or legacy compatibility. These ADCs are used for real-time sensing in applications like motor current feedback, battery cell voltage monitoring, and pedal position detection - all critical inputs for TMS5702135CZWTQQ1-based safety controllers.

What is the role of the N2HET modules in the TMS5702135CZWTQQ1?

The TMS5702135CZWTQQ1 includes two Next Generation High-End Timer (N2HET) modules: N2HET1 with 32 programmable channels and N2HET2 with 18 channels. These are specialized timing coprocessors that execute timing sequences independently of the main CPU using a reduced instruction set. They generate precise PWM waveforms, capture input edges, perform angle-based calculations, and manage complex GPIO patterns - offloading deterministic timing tasks from the Cortex-R4F cores. This is vital for TMS5702135CZWTQQ1 applications such as motor phase control, solenoid actuation, and sensor signal conditioning.

Is external memory expansion supported by the TMS5702135CZWTQQ1?

Yes, the TMS5702135CZWTQQ1 includes a 16-bit External Memory Interface (EMIF) supporting connection to synchronous DRAM (SDRAM), asynchronous SRAM, NOR flash, and FPGA devices. It provides address/data multiplexing, chip select signals, and control lines including EMIF_nRAS, EMIF_nCAS, and EMIF_nWE. This interface enables expansion beyond on-chip memory for applications requiring large data buffers (e.g., event logging), OTA firmware staging, or custom peripheral bridging - extending the capabilities of the base TMS5702135CZWTQQ1 platform without sacrificing safety architecture integrity.