Texas Instruments TMS5701227BZWTQQ1

Overview

TMS5701227BZWTQQ1 from Texas Instruments is an automotive-grade 32-bit ARM Cortex-R4F safety microcontroller with dual lockstep CPUs, 1.25MB flash (ECC-protected), 192KB RAM (ECC-protected), and integrated safety features including BIST, error signaling, and voltage/clock monitoring. It targets ASIL-D functional safety systems in electric power steering, braking, and HEV/EV inverters.

For engineers reviewing the TMS5701227BZWTQQ1 datasheet, TMS5701227BZWTQQ1 pinout, TMS5701227BZWTQQ1 application, or TMS5701227BZWTQQ1 equivalent, key selection criteria include lockstep CPU architecture, FMPLL clocking with slip detection, N2HET timing coprocessor support, dual 12-bit MibADCs (24-channel total), and triple DCAN compliance with CAN 2.0A/B.

Technical Context

The TMS5701227BZWTQQ1 implements a dual-core lockstep execution model where both Cortex-R4F CPUs run identical instructions and compare results in real time to detect transient faults. Its safety architecture includes on-chip BIST for CPU and RAM, ECC on flash and SRAM, parity on peripheral memories, and dedicated Error Signaling Module (ESM) with nERROR output pin.

Timing subsystems include two Next Generation High-End Timer (N2HET) modules - N2HET1 with 32 programmable channels and N2HET2 with 18 - each featuring hardware angle generation, HTU-based DMA transfers, and MPU-protected memory access. The device supports IEEE 802.3-compliant Ethernet MAC (MII/RMII/MDIO), FlexRay (dual-channel), and three DCAN controllers operating up to 1 Mbps.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with TMS570LS1227ZWT, the TMS5701227BZWTQQ1 adds AEC-Q100 Grade 1 qualification and extended temperature support, while SPC574S40E1 offers alternative safety ecosystem integration but omits critical real-time timing peripherals needed for advanced motor control.

Availability

TMS5701227BZWTQQ1 is available at Aetrix Electronics and suitable for electric power steering, braking systems, and HEV/EV inverter control requiring stable component supply across long-life automotive programs.

Supply support for TMS5701227BZWTQQ1 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, specializing in analog, embedded processing, and wireless technologies with deep expertise in automotive safety ICs.

The TMS570 Hercules™ family was designed specifically for ASIL-D and SIL-3 safety-critical applications, integrating lockstep CPUs, memory protection, and self-test capabilities into a single-chip solution for automotive and industrial control.

FAQ

What safety certifications does the TMS5701227BZWTQQ1 hold?

The TMS5701227BZWTQQ1 is AEC-Q100 Grade 1 qualified (–40°C to 125°C) and designed to meet ISO 26262 ASIL-D requirements. It includes integrated safety mechanisms such as dual lockstep CPUs, ECC on flash and RAM, BIST for CPU and memory, and ESM with nERROR output - all documented in TI's SafeTI™ diagnostic software library and FMEDA reports. These features enable certified safety architectures without external safety monitors.

Does the TMS5701227BZWTQQ1 support FlexRay communication?

Yes, the TMS5701227BZWTQQ1 integrates a dual-channel FlexRay controller compliant with FlexRay v2.1, supporting deterministic time-triggered communication at 10 Mbps per channel. It includes a dedicated FlexRay Transfer Unit (FTU) for autonomous data movement between FlexRay message RAM and main memory, with MPU protection ensuring memory isolation during transfers.

What is the role of the Parameter Overlay Module (POM) in the TMS5701227BZWTQQ1?

The Parameter Overlay Module (POM) in the TMS5701227BZWTQQ1 enables runtime redirection of flash memory accesses to internal RAM or external memory via EMIF. This allows field calibration parameters to be updated without reprogramming flash or resetting the system - critical for zero-downtime recalibration in safety-critical applications like EPS or battery management where flash endurance and update latency matter.

How many ADC channels does the TMS5701227BZWTQQ1 support, and how are they allocated?

The TMS5701227BZWTQQ1 features two 12-bit MibADC modules: MibADC1 supports 24 dedicated inputs, while MibADC2 supports 16 inputs shared with MibADC1. Each module has 64-word parity-protected result buffers and supports grouped conversions, continuous mode, and 10-bit compatibility mode. This allocation enables simultaneous sampling of motor phase currents, temperatures, and voltages in real-time control loops.

Can the TMS5701227BZWTQQ1 operate without external crystal oscillators?

Yes, the TMS5701227BZWTQQ1 includes an internal oscillator and two PLLs - a Frequency-Modulated PLL (FMPLL) and a separate nonmodulating PLL - allowing full operation from a single external clock source (e.g., 20 MHz crystal). The FMPLL provides slip detection for fault-tolerant clock generation, and the Global Clock Module (GCM) routes multiple clock domains (CPU, peripheral, N2HET) without requiring additional crystals or oscillators.