Texas Instruments RM44L520APGET

Overview

RM44L520APGET from Texas Instruments is a safety-certifiable 32-bit ARM Cortex-R4F microcontroller designed for IEC 61508 functional safety applications. It features dual lockstep CPUs, ECC-protected 768KB flash and 128KB RAM, 180-MHz operation, and integrated diagnostics including BIST, voltage/clock monitoring, and error signaling via nERROR pin - deployed in industrial PLCs and medical infusion pumps.

For engineers reviewing the RM44L520APGET datasheet, RM44L520APGET pinout, RM44L520APGET application, or RM44L520APGET equivalent, key selection criteria include its SIL-3-capable lockstep architecture, dual N2HET timing coprocessors (32+18 channels), seven ePWM modules with trip-zone protection, two 12-bit MibADCs (24+16 channels), and triple CAN 2.0B interfaces with 64 mailboxes each.

Technical Context

The RM44L520APGET implements a dual-core lockstep execution model where both Cortex-R4F CPUs execute identical instructions and compare results in real time; mismatch triggers ESM fault reporting via nERROR. Its memory subsystem includes ECC on flash and SRAM, parity on peripheral RAMs (MibADC buffers, MibSPI RAM), and MPU-enforced access control for DMA, HTU, and peripheral registers.

Timing peripherals are hardware-accelerated and safety-isolated: two N2HET modules provide deterministic, software-programmable waveform generation and capture with dedicated instruction RAM (160 words each, parity-protected) and HTUs for memory transfers; ePWM and eCAP modules integrate synchronization with MibADC triggers and hardware trip-zone inputs for motor control safety shutdown.

Key Specifications

Pinout & Package

LQFP-144 (PGE) package, 20.0 mm × 20.0 mm body, green RoHS-compliant finish. Pinout validated per TI SPNS229C datasheet Section 4.1.1 and Table 4-1–4-20.

Key Features

Applications

Equivalent & Alternatives

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

Compared with RM44L920PGE and RM46L852PGE, the RM44L520APGET delivers optimal balance of certified safety features, deterministic real-time peripherals, and cost efficiency for mid-tier industrial and medical safety controllers - retaining full lockstep, ECC, and N2HET capability while reducing flash overhead for streamlined certification.

Availability

RM44L520APGET is available at Aetrix Electronics and suitable for industrial safety PLCs, medical infusion pumps, wind turbine pitch systems, and robotic surgery actuators requiring stable component supply across long product lifecycles.

Supply support for RM44L520APGET 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 functional safety design and automotive/industrial qualification.

The RM44Lx20 product line delivers ARM Cortex-R-based MCUs engineered specifically for IEC 61508 SIL-3 and ISO 26262 ASIL-D safety-critical applications - integrating lockstep cores, ECC memory, and self-test logic to reduce system-level certification burden.

FAQ

What safety certifications does the RM44L520APGET support out of the box?

The RM44L520APGET is architected to support IEC 61508 SIL-3 and ISO 26262 ASIL-D compliance. It includes dual lockstep CPUs, ECC on flash and RAM, BIST for CPU and memory, voltage/clock monitors, and ESM with nERROR output - all documented in TI's Functional Safety Documentation Package (SPRUIK7). No external components are required to achieve these diagnostic coverage targets when used per TI's safety manual.

Does the RM44L520APGET support LIN 2.1 communication?

Yes, the RM44L520APGET includes one SCI module with LIN 2.1 protocol support, as confirmed in Section 1.1 and Table 3-1 of the SPNS229C datasheet. This SCI can operate in full-duplex UART mode or as a LIN master/slave node compliant with ISO 17987-2, enabling communication with LIN sensors and actuators in medical and automotive safety systems.

How many N2HET channels does the RM44L520APGET provide, and are they fully usable in the PGE package?

The RM44L520APGET integrates two N2HET modules: N2HET1 with 32 programmable channels and N2HET2 with 18 channels - totaling 50 channels. All channels are accessible in the 144-pin PGE package (pinout verified in Figure 4-1 and Table 4-2 of SPNS229C), with dedicated pins assigned for N2HET1[0–31] and N2HET2[0–17] plus disable controls.

What is the maximum ADC sampling rate achievable with the RM44L520APGET's MibADC modules?

The RM44L520APGET's two 12-bit MibADCs support up to 5 MSPS aggregate throughput when configured in interleaved or group-triggered modes. Each MibADC has its own dedicated sample-and-hold and conversion engine; ADC1 achieves 2.5 MSPS on 24 channels, ADC2 achieves 2.5 MSPS on 16 channels, with 16 shared inputs allowing synchronized sampling across both cores.

Can the RM44L520APGET's ePWM modules generate complementary outputs with programmable deadband?

Yes, each of the seven ePWM modules in the RM44L520APGET supports complementary output pairs (ePWMxA/ePWMxB) with fully programmable deadband delay (0–1023 SYSCLK cycles) and edge-aligned/center-aligned modes. This is explicitly documented in Section 7.2 of SPNS229C and enables safe gate driving for three-phase inverters and motor drives without external deadband ICs.