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Texas Instruments RM48L740DZWTT
- Part No.:
- RM48L740DZWTT
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 337-LFBGA
- Datasheet:
-
RM48L740DZWTT.pdf
- Description:
- IC MCU 16/32B 2MB FLASH 337NFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,989
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Product details
Overview
RM48L740DZWTT 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, 10/100 Ethernet MAC, 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 RM48L740DZWTT datasheet, RM48L740DZWTT pinout, RM48L740DZWTT application, or RM48L740DZWTT equivalent, key selection considerations include functional safety compliance (IEC 61508 SIL-3, ISO 26262 ASIL-D), dual-CPU lockstep execution, ECC-protected memory hierarchy, and support for real-time deterministic I/O via N2HET and MibADC modules.
Technical Context
The RM48L740DZWTT implements a dual-core lockstep architecture where both Cortex-R4F CPUs execute identical instructions and compare results in real time to detect transient faults. Its safety subsystem includes BIST for CPU and SRAM, voltage/clock monitoring, and an Error Signaling Module (ESM) that asserts the nERROR pin on fault detection.
Timing control is handled by two independent Next Generation High-End Timer (N2HET) modules: N2HET1 with 32 programmable channels and N2HET2 with 18 channels, each featuring hardware angle generation, dedicated HTU DMA engines, and MPU-protected memory access - enabling precise PWM, capture, and GPIO sequencing in motor control and sensor fusion applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-R4F, 200 MHz max, 1.66 DMIPS/MHz - delivers 332 DMIPS real-time deterministic performance with FPU support for floating-point math in control loops. |
| Flash Memory | 2 MB with ECC - enables robust firmware storage with single-bit correction/double-bit detection; supports pipeline mode at full 200 MHz system clock. |
| RAM | 256 KB SRAM with ECC - provides fault-tolerant data workspace for safety-critical variables and stack operations. |
| ADC | Two 12-bit MibADCs, 24 total channels, 64-word parity-protected buffer each - supports synchronized sampling, grouped sequences, and 10-bit compatibility mode. |
| Communication | Three DCAN (CAN 2.0B, up to 1 Mbps), 10/100 EMAC (MII/RMII/MDIO), I2C (100/400 kbps), LIN 2.1, SCI, three MibSPI, two SPI - meets multi-bus requirements in distributed safety networks. |
| Safety Features | Dual lockstep CPUs, CPU/RAM BIST, ESM with nERROR pin, FMPLL slip detector, voltage/clock monitors - satisfies IEC 61508 SIL-3 and ISO 26262 ASIL-D certification requirements. |
| Package | NFBGA-337 (ZWT), 16 mm × 16 mm, 0.8 mm pitch - supports high-density PCB layouts with thermal and signal integrity optimized for industrial environments. |
Pinout & Package
NFBGA-337 (ZWT) package with 16.0 mm × 16.0 mm body size and 0.8 mm ball pitch; designed for automated assembly and thermal reliability in extended temperature (-40°C to +105°C) operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| nERROR | Error signaling output | Active-low open-drain fault indicator asserted by ESM on detected CPU, memory, or clock failure - enables external watchdog or system shutdown coordination. |
| VCC / VSS | Core power / ground | 1.2 V nominal core supply (1.14–1.32 V range); requires tight regulation and local decoupling for lockstep CPU stability. |
| VCCIO / VSS | I/O power / ground | 3.3 V nominal I/O supply (3.0–3.6 V range); powers all peripheral interfaces including CAN, Ethernet, and ADC reference circuitry. |
| VCCAD / VSSAD | ADC analog supply / ground | Separate 3.0–5.25 V analog domain for ADC - isolates noise-sensitive conversion circuitry from digital switching transients. |
| ADREFHI / ADREFLO | ADC reference inputs | Differential reference pair defining full-scale ADC range; supports external precision references or internal VCCAD-derived bias. |
| N2HET1[31:0] | N2HET1 I/O pins | 32 dedicated pins for N2HET1 timer module - configurable as PWM outputs, capture inputs, or GPIO with sub-microsecond timing resolution. |
| EMAC_MII_RXD[3:0] | Ethernet receive data | 4-bit parallel MII interface for 10/100 Mbps Ethernet - requires impedance-controlled routing and PHY-side termination per IEEE 802.3. |
| DCAN1_TX / DCAN1_RX | CAN controller channel 1 | Differential CAN bus interface compliant with ISO 11898-1; supports galvanic isolation and common-mode choke implementation for EMI resilience. |
Key Features
| Feature | Design Value |
|---|---|
| Dual CPU Lockstep Execution | Real-time comparison of instruction results between two identical Cortex-R4F cores eliminates undetected soft errors - foundational for SIL-3/ASIL-D compliance. |
| ECC-Protected Memory Hierarchy | 2MB flash and 256KB RAM both implement SEC-DED ECC - prevents silent data corruption in firmware and runtime variables without software overhead. |
| Two Independent N2HET Modules | N2HET1 (32 channels) and N2HET2 (18 channels) operate autonomously with dedicated HTUs and MPUs - enable concurrent high-precision timing tasks (e.g., motor commutation + sensor sampling) without CPU intervention. |
| Integrated Safety Monitoring | Built-in BIST, FMPLL slip detector, voltage/clock monitors, and ESM with nERROR pin provide hardware-enforced fault coverage exceeding 90% diagnostic coverage per IEC 61508. |
| Multibuffered ADC with Grouped Sequencing | Two 12-bit MibADCs share 16 channels; support software-defined conversion groups with trigger synchronization - ideal for phase-aligned current/voltage sampling in motor drives. |
Applications
| Industrial Safe PLCs | Ventilator Control Systems |
|---|---|
Use Scenario: Real-time logic execution and I/O monitoring in certified safety PLCs for factory automation and emergency shutdown systems. IC Role / Device Role / Timing Role: Primary safety controller executing certified runtime firmware with lockstep CPU verification and periodic BIST self-tests. Use Value: Enables SIL-3 certification through hardware-level fault detection, ECC memory, and deterministic interrupt latency under worst-case load conditions. | Use Scenario: Closed-loop pressure and flow control in Class II medical ventilators requiring fail-safe operation and regulatory auditability. IC Role / Device Role / Timing Role: Central safety MCU managing respiratory cycle timing, sensor fusion (pressure, O₂, flow), and alarm generation with redundant path validation. Use Value: Meets ISO 13485 and IEC 62304 requirements via integrated ESM, nERROR signaling, and traceable fault logging to external nonvolatile memory. |
| Power Generation Protection Relays | Robotic Surgery Actuation |
Use Scenario: Fault detection and breaker tripping coordination in grid-connected wind turbine and solar inverter protection relays. IC Role / Device Role / Timing Role: High-integrity protection processor sampling CT/PT analog inputs via MibADCs and issuing trip commands via N2HET-driven isolation outputs. Use Value: Achieves <10 µs sampling-to-action latency with hardware-accelerated filtering and CRC-protected communication to SCADA systems. | Use Scenario: Real-time joint position control and force feedback processing in FDA-cleared robotic surgical arms. IC Role / Device Role / Timing Role: Deterministic motion controller synchronizing encoder reads, torque command generation, and safety interlock monitoring. Use Value: Supports ASIL-D decomposition via dual-lockstep execution and hardware-enforced separation of safety-critical and non-safety firmware partitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar safety microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RM48L940ZWT | 3 MB flash, same 256 KB ECC RAM, identical peripherals and safety architecture - higher code density margin for complex safety stacks. | Preferred where larger bootloader, dual-application partitioning, or future firmware expansion is required without changing PCB layout. | Select when additional flash headroom is needed for certified safety libraries, OTA update staging, or redundancy-aware firmware architectures. |
| TMS570LS1227ZWTQ | ARM Cortex-R4F, 180 MHz, 1.25 MB flash, 192 KB RAM, same lockstep, ECC, and N2HET - lower memory capacity and reduced peripheral count (2 DCAN, no EMAC). | Suitable for cost-optimized safety nodes where Ethernet connectivity is unnecessary and CAN-only fieldbus suffices. | Choose for CAN-based distributed control nodes where Ethernet is absent and smaller footprint reduces BOM cost without compromising safety certification path. |
Compared with RM48L940ZWT, the RM48L740DZWTT trades 1 MB flash for identical safety features and real-time capability - optimizing cost for fixed-function safety applications. Against TMS570LS1227ZWTQ, it adds EMAC and third DCAN while increasing memory, making it suitable for centralized safety gateways rather than edge nodes.
Availability
RM48L740DZWTT is available at Aetrix Electronics and suitable for industrial safety PLCs, medical ventilator control systems, and power generation protection relays requiring stable component supply across long product lifecycles.
Supply support for RM48L740DZWTT 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 innovation in industrial and automotive markets.
The RM48Lx40 product line was engineered specifically for IEC 61508 and ISO 26262 safety-critical applications - integrating lockstep CPUs, memory ECC, and hardware monitors into a single-chip solution for functional safety certification.
FAQ
What safety certifications does the RM48L740DZWTT support?
The RM48L740DZWTT is architected to support IEC 61508 SIL-3 and ISO 26262 ASIL-D certification. Its dual lockstep CPUs, ECC-protected memory, BIST logic, ESM with nERROR pin, and FMPLL slip detector collectively provide the hardware foundation required for systematic fault coverage. Certification documentation, safety manuals, and FMEDA reports are provided by Texas Instruments to accelerate end-equipment qualification - the RM48L740DZWTT itself is not pre-certified, but its safety mechanisms are validated for use in certified systems.
Does the RM48L740DZWTT include an Ethernet MAC, and what interfaces does it support?
Yes, the RM48L740DZWTT includes a fully integrated 10/100 Mbps Ethernet Media Access Controller (EMAC). It supports MII (Media Independent Interface), RMII (Reduced MII), and MDIO (Management Data Input/Output) interfaces - enabling direct connection to standard Ethernet PHYs without external glue logic. The EMAC is IEEE 802.3 compliant and operates with 3.3-V I/O only, requiring proper impedance-controlled PCB routing and PHY-side termination per specification.
How many CAN controllers are integrated into the RM48L740DZWTT, and what protocol versions do they support?
The RM48L740DZWTT integrates three Controller Area Network (DCAN) modules, each compliant with the CAN 2.0B protocol standard. These controllers support both standard (11-bit) and extended (29-bit) identifier formats and operate at bit rates up to 1 Mbps. Each DCAN includes 64 mailboxes with parity protection and supports loopback mode for self-test - making them suitable for automotive and industrial fieldbus applications requiring robust, noise-immune serial communication.
What is the role of the N2HET modules in the RM48L740DZWTT, and how many channels do they provide?
RM48L740DZWTT includes two Next Generation High-End Timer (N2HET) modules: N2HET1 with 32 programmable channels and N2HET2 with 18 channels. These are autonomous timing coprocessors that offload precise real-time tasks from the main CPU - such as PWM generation, input capture, GPIO sequencing, and hardware angle calculation. Each N2HET has a dedicated High-End Transfer Unit (HTU) for DMA-like memory transfers and an integrated MPU for memory protection - enabling deterministic, low-latency I/O control without CPU polling or interrupts.
Can the RM48L740DZWTT's ADCs be used simultaneously, and what is their shared channel configuration?
Yes, the RM48L740DZWTT features two independent 12-bit Multibuffered ADCs (MibADC1 and MibADC2) that can operate concurrently. They share 16 analog input channels, with MibADC1 supporting 24 total channels (8 dedicated + 16 shared) and MibADC2 supporting 16 channels (all shared). Each ADC has a 64-word result buffer with parity protection and supports software-configurable conversion groups, trigger synchronization, and continuous or one-shot modes - enabling phase-aligned sampling for motor control and power quality monitoring.
RM48L740DZWTT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 337-LFBGA
- Series:
- Hercules™ RM4 ARM® Cortex®-R4, Functional Safety (FuSa)
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-R4F
- Core Size:
- 16/32-Bit
- Speed:
- 200MHz
- Connectivity:
- CANbus, EBI/EMI, Ethernet, I2C, LINbus, MibSPI, SCI, SPI, UART/USART
- Peripherals:
- DMA, POR, PWM, WDT
- Number of I/O:
- 120
- Program Memory Size:
- 2MB (2M x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 64K x 8
- RAM Size:
- 256K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.14V ~ 1.32V
- Data Converters:
- A/D 24x12b
- Oscillator Type:
- External
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
RM48L740DZWTT FAQ
1.How can I place an order for RM48L740DZWTT through Aetrix?
Please submit a Request for Quotation (RFQ) for RM48L740DZWTT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for RM48L740DZWTT reliable?
The price and inventory of RM48L740DZWTT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RM48L740DZWTT is usually 5 days.
3.What payment methods are accepted for RM48L740DZWTT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RM48L740DZWTT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RM48L740DZWTT?
RM48L740DZWTT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RM48L740DZWTT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for RM48L740DZWTT?
For technical support, including RM48L740DZWTT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RM48L740DZWTT requirements.
6.How does Aetrix verify that RM48L740DZWTT is sourced from the original manufacturer or authorized distributors?
All RM48L740DZWTT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that RM48L740DZWTT meets industry standards.
7.What is the process for return or replacement of RM48L740DZWTT?
All RM48L740DZWTT units undergo pre-shipment inspection (PSI). If there is an issue with RM48L740DZWTT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The RM48L740DZWTT part is unused and in its original packaging.
Return procedure for RM48L740DZWTT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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