Texas Instruments RM48L730DZWTT

Overview

RM48L730DZWTT from Texas Instruments is a safety-certified 32-bit ARM Cortex-R4F microcontroller for industrial and medical safety-critical systems. It integrates dual lockstep CPUs, 2MB flash with ECC, 256KB RAM with ECC, three CAN controllers, two 12-bit MibADCs (24-channel total), and two N2HET timing coprocessors - deployed in ventilators, safe PLCs, and radiation therapy equipment.

For engineers reviewing the RM48L730DZWTT datasheet, RM48L730DZWTT pinout, RM48L730DZWTT application, or RM48L730DZWTT equivalent, key selection criteria include ASIL-D readiness, dual-CPU lockstep validation, FMPLL clock redundancy, 337-ball NFBGA package compatibility, and integrated error signaling with external ERROR pin assertion.

Technical Context

The RM48L730DZWTT implements a dual-core lockstep architecture where both Cortex-R4F CPUs execute identical instructions and compare results in real time; mismatch triggers ESM fault reporting via nERROR pin. Its memory subsystem enforces ECC on 2MB flash and 256KB SRAM, plus parity protection on peripheral RAMs including 64-word ADC buffers and N2HET instruction RAM.

Timing control relies on two independent N2HET modules: N2HET1 (32 channels) and N2HET2 (18 channels), each with dedicated HTU DMA engines and MPU-protected memory access. Communication is supported by three DCAN controllers (CAN 2.0B, up to 1 Mbps), two MibSPIs, one LIN 2.1 interface, and USB 2.0 host/device capability - all with loopback test modes for functional safety verification.

Key Specifications

Pinout & Package

RM48L730DZWTT uses a 337-ball NFBGA (ZWT) package, 16.0 mm × 16.0 mm, 0.8-mm ball pitch, green RoHS-compliant construction. Ball mapping supports full peripheral routing including EMIF, USB, CAN, ADC references, and dual N2HET I/O banks.

Key Features

Applications

Equivalent & Alternatives

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

Compared with RM48L930ZWT, RM48L730DZWTT trades 1 MB flash for identical safety features and cost optimization; versus RM46L852ZWT, it retains USB host/device capability and larger RAM while omitting Ethernet - making it optimal for embedded safety controllers with local HMI or peripheral connectivity.

Availability

RM48L730DZWTT is available at Aetrix Electronics and suitable for industrial safety PLCs, medical ventilators, radiation therapy systems, and robotic surgery controllers requiring stable component supply and long-term lifecycle support.

Supply support for RM48L730DZWTT 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 IC development experience.

The RM48Lx30 product line was designed specifically for IEC 61508 SIL-3 and ISO 26262 ASIL-D safety-critical applications - integrating lockstep CPUs, memory ECC, hardware BIST, and fault-signaling infrastructure into a single-chip solution.

FAQ

What safety certifications does the RM48L730DZWTT support?

The RM48L730DZWTT supports IEC 61508 SIL-3 and ISO 26262 ASIL-D compliance through its dual lockstep CPU architecture, ECC-protected memories, built-in BIST, voltage/clock monitoring, and Error Signaling Module (ESM) with external nERROR pin. TI provides safety manuals, FMEDA reports, and diagnostic software libraries to accelerate certification of end systems using RM48L730DZWTT.

Does the RM48L730DZWTT include USB functionality, and what modes are supported?

Yes, the RM48L730DZWTT integrates a USB 2.0 controller supporting both host and device modes. It implements two USB ports: one full-speed USB device port and a dual-port USB host controller (OHCI). The USB PHY is integrated, and pinout includes VP/VM differential pairs, VBUS sensing, and port power control - enabling direct connection to peripherals like HID devices or host-side communication with PCs.

How does the RM48L730DZWTT handle analog signal acquisition for safety-critical measurements?

The RM48L730DZWTT features two independent 12-bit MibADC modules: ADC1 with 24 input channels and ADC2 with 16 channels (16 shared with ADC1). Each has 64-word parity-protected result buffers and supports hardware-triggered conversion sequences. ADC references (ADREFHI/ADREFLO) and dedicated VCCAD/VSSAD supplies isolate analog performance from digital noise - essential for accurate current/voltage sensing in safety loops.

What is the role of the N2HET modules in the RM48L730DZWTT, and how many channels do they provide?

The RM48L730DZWTT includes two Next Generation High-End Timer (N2HET) modules: N2HET1 with 32 programmable channels and N2HET2 with 18 channels. Each operates as an autonomous timing coprocessor with its own instruction RAM, HTU DMA engine, and MPU. They perform precise PWM generation, input capture, and GPIO control - offloading deterministic real-time tasks from the main Cortex-R4F CPU to ensure timing predictability in safety-critical functions.

Is the RM48L730DZWTT pin-compatible with other devices in the RM48Lx30 family?

Yes, the RM48L730DZWTT in the 337-ball ZWT package is pin-compatible with RM48L930ZWT and RM48L530ZWT. All share identical ball mapping, power domains, peripheral pin assignments, and mechanical footprint - enabling hardware reuse across variants differing only in flash size (2 MB vs. 3 MB), RAM size (256 KB vs. 192 KB), and feature enablement. This simplifies design scalability and safety qualification reuse.