Texas Instruments XRM48L952ZWTT

Overview

XRM48L952ZWTT from Texas Instruments is a safety-certified 32-bit ARM Cortex-R4F microcontroller designed for industrial and medical safety-critical systems. It features dual lockstep CPUs, 3 MB flash with ECC, 256 KB RAM with ECC, 3× CAN 2.0B controllers, 10/100 Mbps Ethernet MAC, and two 12-bit MibADCs (24-channel total). It operates at up to 220 MHz with 1.2 V core and 3.3 V I/O supply, targeting PLCs, ventilators, and radiation therapy equipment.

For engineers reviewing the XRM48L952ZWTT datasheet, XRM48L952ZWTT pinout, XRM48L952ZWTT application, or XRM48L952ZWTT equivalent, this page delivers verified technical context, package-specific pin mapping, real-time control peripheral integration details, safety architecture validation points (BIST, ECC, ESM), and direct alternative part comparisons for functional substitution in IEC 61508/ISO 26262-aligned designs.

Technical Context

The XRM48L952ZWTT implements a dual-CPU lockstep architecture with built-in BIST for CPU and memory, ECC on flash and SRAM, and parity protection across peripheral memories and N2HET mailboxes. Its FMPLL and nonmodulating PLL provide robust clock generation with slip detection and voltage monitoring.

It integrates two Next Generation High-End Timer (N2HET) modules - N2HET1 (32 channels) and N2HET2 (18 channels) - each with dedicated HTU and MPU, enabling deterministic real-time waveform generation, capture, and GPIO control. The EMAC supports MII, RMII, and MDIO interfaces with IEEE 802.3 compliance.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with RM48L950ZWT and RM46L852ZWT, the XRM48L952ZWTT provides the highest integrated bandwidth (EMAC + dual USB), largest safety memory (3 MB + 64 KB EEPROM), and maximum real-time capability (220 MHz + dual N2HET), making it optimal for centralized safety controllers requiring full protocol stack execution and hardware-accelerated I/O.

Availability

XRM48L952ZWTT is available at Aetrix Electronics and suitable for industrial safety PLCs, medical ventilators, and power generation monitoring systems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for ISO 13485 and IEC 61508 certification programs.

Supply support for XRM48L952ZWTT 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 over 50 years of automotive and industrial design-in experience.

The Hercules™ RM family - including the XRM48L952ZWTT - was engineered specifically for functional safety applications compliant with IEC 61508 SIL-3 and ISO 26262 ASIL-D, integrating hardware safety mechanisms directly into the MCU silicon.

FAQ

What safety certifications apply to the XRM48L952ZWTT?

The XRM48L952ZWTT is architected to support IEC 61508 SIL-3 and ISO 26262 ASIL-D compliance. It includes dual lockstep CPUs, ECC memory, BIST, ESM, and voltage/clock monitoring - all documented in TI's Hercules Safety Manual (SPNU504). Certification evidence must be generated per end-application requirements; XRM48L952ZWTT provides the foundational hardware safety mechanisms.

Does the XRM48L952ZWTT support Ethernet PHY interfacing without external components?

Yes - the XRM48L952ZWTT's EMAC supports MII, RMII, and MDIO interfaces. When used with an external PHY (e.g., DP83848), it enables full 10/100 Mbps Ethernet connectivity. RMII mode reduces pin count and simplifies layout; MDIO allows runtime PHY register configuration. No internal PHY is integrated, so an external PHY remains required.

How many ADC channels can be sampled simultaneously on the XRM48L952ZWTT?

The XRM48L952ZWTT features two 12-bit MibADC modules: ADC1 with 24 dedicated inputs and ADC2 with 16 inputs (16 shared with ADC1). While both ADCs operate independently, true simultaneous sampling across all 40 channels is not supported. However, group-triggered conversions allow tightly synchronized sampling of up to 24 channels on ADC1 or 16 on ADC2 within one sequence.

What debug and trace capabilities does the XRM48L952ZWTT provide?

The XRM48L952ZWTT includes ARM CoreSight™ debug infrastructure, Embedded Trace Macrocell (ETM-R4) for instruction/data trace, RAM Trace Port (RTP) for high-speed memory/peripheral access tracing, Data Modification Module (DMM) for external memory writes, and Parameter Overlay Module (POM) for dynamic flash-to-RAM parameter rerouting - all with minimal impact on real-time execution.

Is the XRM48L952ZWTT pin-compatible with other RM48x devices in the ZWT package?

Yes - all RM48x devices in the ZWT package (e.g., RM48L950ZWT, RM48L750ZWT) share identical ball mapping and mechanical footprint. Signal multiplexing differs per variant, but PCB layout is reusable. Software porting requires validation of peripheral enablement and clock configuration due to differences in memory size, N2HET channel count, and USB/EMAC presence.