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Texas Instruments RM48L940DZWTT
- Part No.:
- RM48L940DZWTT
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 337-LFBGA
- Datasheet:
-
RM48L940DZWTT.pdf
- Description:
- IC MCU 16/32B 3MB FLASH 337NFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,105
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Product details
Overview
RM48L940DZWTT from Texas Instruments is a safety-certified 32-bit ARM Cortex-R4F microcontroller for functional safety-critical systems, featuring dual lockstep CPUs, 3MB flash with ECC, 256KB RAM with ECC, 10/100 Mbps Ethernet MAC, three CAN 2.0B controllers, and two 12-bit MibADCs with 24 total channels - deployed in industrial PLCs and medical ventilators.
For engineers reviewing the RM48L940DZWTT datasheet, RM48L940DZWTT pinout, RM48L940DZWTT application, or RM48L940DZWTT equivalent, key selection criteria include ASIL-D readiness via BIST/ECC/error signaling, N2HET timing coprocessor support for deterministic actuator control, FMPLL clocking with slip detection, and 337-ball NFBGA (ZWT) package compatibility with industrial thermal and EMI requirements.
Technical Context
The RM48L940DZWTT implements a dual-CPU lockstep architecture with built-in BIST, ECC on flash and SRAM, parity-protected peripheral memories, and loopback I/O for ISO 26262/IEC 61508 compliance. Its ARM Cortex-R4F core runs at up to 200 MHz (332 DMIPS), supports little-endian format, and integrates a 12-region MPU for memory protection.
Real-time peripherals include two N2HET modules (32 + 18 programmable channels), two 12-bit MibADCs with 64-word parity-protected buffers each, and a DMA controller with 16 channels and dedicated MPU. Clocking uses dual FMPLLs with slip detection and an external clock prescaler (ECLK) for frequency monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-R4F, 200 MHz max, 332 DMIPS, FPU with single/double precision |
| Memory | 3MB flash with ECC, 256KB RAM with ECC, 64KB flash for emulated EEPROM |
| ADC | Two 12-bit MibADCs: ADC1 with 24 channels, ADC2 with 16 shared channels, 64-word parity-protected buffer each |
| Timers | N2HET1 (32 channels), N2HET2 (18 channels), RTI timer, 96-channel VIM interrupt controller |
| Communication | Three DCAN (CAN 2.0B, up to 1 Mbps), EMAC (MII/RMII/MDIO), I2C (100/400 kbps), LIN 2.1, SCI, three MibSPI, two SPI |
| Safety Features | Dual lockstep CPUs, ECC on flash/RAM, parity on peripheral RAMs, BIST for CPU/SRAM, ESM with ERROR pin, voltage/clock monitoring |
| Package | NFBGA-337 (ZWT), 16.0 mm × 16.0 mm, green RoHS-compliant |
Pinout & Package
NFBGA-337 (ZWT) package with 16.0 mm × 16.0 mm body size, 0.8 mm ball pitch, and green RoHS-compliant construction. Designed for high-density industrial PCB layouts with thermal and EMI robustness.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC / VSS | Core power / ground | 1.2 V nominal core supply (1.14–1.32 V); multiple distributed pins for low-noise power integrity |
| VCCIO / VSS | I/O power / ground | 3.3 V nominal I/O supply (3.0–3.6 V); separate domain enables mixed-voltage interfacing |
| VCCAD / VSSAD / ADREFHI / ADREFLO | ADC analog supply & reference | Dedicated 3.0–5.25 V ADC supply with isolated analog ground and precision reference inputs |
| EMAC_MII_RXD[3:0] / TXD[3:0] | Ethernet physical interface | 4-bit MII receive/transmit data lanes supporting IEEE 802.3 10/100 Mbps operation |
| CAN1_TX / CAN1_RX | CAN bus transceiver interface | Differential pair for first CAN 2.0B controller; supports up to 1 Mbps in noisy industrial environments |
| N2HET1[31:0] | High-end timer I/O bank | 32 dedicated pins for N2HET1 coprocessor - configurable as PWM, capture, compare, or GPIO with sub-microsecond timing resolution |
Key Features
| Feature | Design Value |
|---|---|
| Dual lockstep CPU execution | Hardware-enforced functional redundancy enabling ASIL-D compliance per ISO 26262 without software overhead |
| ECC on 3MB flash & 256KB RAM | Single-bit error correction and double-bit error detection ensures data integrity across full memory lifetime in harsh environments |
| Two N2HET timing coprocessors | Offloads deterministic real-time pulse generation and sensor sampling from main CPU - critical for motor control and valve actuation |
| Integrated EMAC with MII/RMII/MDIO | Full 10/100 Mbps Ethernet connectivity without external PHY required for industrial network edge nodes |
| Error Signaling Module (ESM) | Centralized fault monitoring with configurable ERROR pin assertion and interrupt generation for fail-safe system response |
Applications
| Industrial Safety PLC | Medical Ventilator Control |
|---|---|
Use Scenario: Real-time motion control and safety interlocking in programmable logic controllers for factory automation. IC Role / Device Role / Timing Role: Primary safety MCU executing SIL3-certified control loops with lockstep CPU verification and hardware BIST. Use Value: Enables certified safe shutdown within <100 µs upon fault detection using ESM-triggered ERROR pin and dual-core divergence checking. | Use Scenario: Closed-loop pressure and flow regulation in Class II/III life-support ventilators. IC Role / Device Role / Timing Role: Central controller managing ADC-sampled respiratory signals, N2HET-driven valve timing, and CAN-bus patient alarm distribution. Use Value: Meets IEC 62304 and IEC 61508 requirements via ECC memory, parity-protected ADC buffers, and FMPLL slip detection for clock fault resilience. |
| Power Generation Monitoring | Robotic Surgery System |
Use Scenario: Grid synchronization and fault detection in wind turbine inverters and solar microgrid controllers. IC Role / Device Role / Timing Role: High-integrity data acquisition node interfacing with isolation amplifiers, EMAC for SCADA reporting, and DCAN for local drive coordination. Use Value: Supports 10-year field reliability with 3MB ECC flash storing firmware updates and event logs, plus voltage/clock monitoring for brownout immunity. | Use Scenario: Real-time instrument tracking and torque control in minimally invasive surgical robots. IC Role / Device Role / Timing Role: Safety-critical motion controller coordinating multi-axis servo drives via CAN and precise joint position feedback via MibADC. Use Value: Achieves sub-100 ns jitter on N2HET outputs for synchronized actuator pulses, while ESM and ERROR pin enable immediate mechanical stop on signal corruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar safety microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RM48L952ZWT | ARM Cortex-R4F at 220 MHz, 3MB flash, 256KB RAM, adds USB OHCI + device support | Requires USB host/peripheral capability for HMI or firmware update interfaces not needed in pure control nodes | Select RM48L952ZWT only if USB connectivity is mandatory; otherwise RM48L940DZWTT offers identical safety features at lower cost and power |
| RM57L843ZWT | ARM Cortex-R5F core, 333 MHz, 4MB flash, 512KB RAM, enhanced cache, no EMAC | Targeted at higher-performance compute-intensive safety tasks where Ethernet is replaced by serial backhaul or custom interfaces | Choose RM57L843ZWT when >332 DMIPS or larger memory footprint is required; RM48L940DZWTT remains optimal for Ethernet-enabled safety nodes |
Compared with RM48L952ZWT and RM57L843ZWT, the RM48L940DZWTT delivers the optimal balance of ASIL-D-ready peripherals (EMAC, DCAN, N2HET), deterministic real-time performance, and cost-effective 200 MHz Cortex-R4F execution - making it the preferred choice for Ethernet-connected industrial and medical safety controllers where USB or extreme compute headroom are unnecessary.
Availability
RM48L940DZWTT is available at Aetrix Electronics and suitable for industrial safety PLCs, medical ventilator control systems, and power generation monitoring requiring stable component supply over extended product lifecycles.
Supply support for RM48L940DZWTT 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 delivering analog, embedded processing, and connectivity solutions with deep expertise in functional safety and industrial-grade reliability.
The RM48Lx40 product line was designed specifically for ASIL-B/D and SIL2/3 safety-critical applications - integrating lockstep CPUs, ECC memory, BIST, and error signaling to eliminate external safety monitors in automotive, medical, and industrial systems.
FAQ
What safety certifications does the RM48L940DZWTT support?
The RM48L940DZWTT supports ISO 26262 ASIL-D and IEC 61508 SIL3 certification through integrated hardware safety mechanisms including dual lockstep CPUs, ECC on flash and RAM, BIST for CPU and memory, parity protection on peripheral RAMs, and the Error Signaling Module (ESM). TI provides certified safety documentation, FMEDA reports, and diagnostic software libraries to accelerate RM48L940DZWTT-based system certification.
Does the RM48L940DZWTT include an Ethernet MAC with PHY support?
No, the RM48L940DZWTT includes only a Media Access Controller (EMAC) - not a physical layer (PHY). It supports MII, RMII, and MDIO interfaces and requires an external 10/100 Mbps Ethernet PHY IC (e.g., DP83848) for full Ethernet connectivity. The RM48L940DZWTT's EMAC is IEEE 802.3 compliant and operates with 3.3-V I/O only.
What is the maximum operating temperature range for the RM48L940DZWTT?
The RM48L940DZWTT is rated for operation from –40°C to +105°C ambient temperature, qualified per AEC-Q100 Grade 2 standards. This extended temperature range supports deployment in demanding industrial enclosures, medical equipment housings, and outdoor power generation cabinets without derating.
How many CAN controllers does the RM48L940DZWTT integrate?
The RM48L940DZWTT integrates three fully independent DCAN controllers compliant with CAN Protocol Version 2.0B, each supporting bit rates up to 1 Mbps. All three controllers feature 64 mailboxes with parity protection and are optimized for noise-immune communication in industrial fieldbus and automotive networking applications.
Is the RM48L940DZWTT pin-compatible with other RM48Lx40 variants?
Yes, the RM48L940DZWTT in the ZWT (337-ball NFBGA) package is pin-compatible with RM48L740ZWT and RM48L540ZWT - sharing identical ball maps, power domains, and peripheral pin assignments. Differences are limited to internal memory size (3MB vs. 2MB/2MB flash, 256KB vs. 256KB/192KB RAM) and do not affect PCB layout or signal routing.
RM48L940DZWTT 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:
- 3MB (3M 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:
RM48L940DZWTT FAQ
1.How can I place an order for RM48L940DZWTT through Aetrix?
Please submit a Request for Quotation (RFQ) for RM48L940DZWTT 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 RM48L940DZWTT reliable?
The price and inventory of RM48L940DZWTT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RM48L940DZWTT is usually 5 days.
3.What payment methods are accepted for RM48L940DZWTT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RM48L940DZWTT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RM48L940DZWTT?
RM48L940DZWTT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RM48L940DZWTT 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 RM48L940DZWTT?
For technical support, including RM48L940DZWTT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RM48L940DZWTT requirements.
6.How does Aetrix verify that RM48L940DZWTT is sourced from the original manufacturer or authorized distributors?
All RM48L940DZWTT 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 RM48L940DZWTT meets industry standards.
7.What is the process for return or replacement of RM48L940DZWTT?
All RM48L940DZWTT units undergo pre-shipment inspection (PSI). If there is an issue with RM48L940DZWTT, 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 RM48L940DZWTT part is unused and in its original packaging.
Return procedure for RM48L940DZWTT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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