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Texas Instruments RM44L520APZT
- Part No.:
- RM44L520APZT
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
RM44L520APZT.pdf
- Description:
- IC MCU 16/32B 768KB FLSH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:400
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Product details
Overview
RM44L520APZT from Texas Instruments is a safety-certifiable 32-bit ARM Cortex-R4F microcontroller designed for IEC 61508 SIL-3 industrial control systems. It features dual lockstep CPUs, 768KB flash with ECC, 128KB RAM with ECC, 180-MHz operation, and integrated functional safety peripherals including BIST, ESM, and voltage/clock monitoring - deployed in safe PLCs and turbine controllers.
For engineers reviewing the RM44L520APZT datasheet, RM44L520APZT pinout, RM44L520APZT application, or RM44L520APZT equivalent, key selection criteria include its dual-CPU lockstep architecture, 768KB ECC flash capacity, 144-pin LQFP (PGE) package compatibility, and support for CAN 2.0B, ePWM, N2HET, and MibADC in safety-critical real-time control.
Technical Context
The RM44L520APZT implements a dual-core lockstep execution model where both Cortex-R4F CPUs execute identical instructions and compare results at each cycle; mismatches trigger error signaling via the dedicated nERROR pin and Error Signaling Module (ESM). Its memory subsystem includes ECC-protected flash and SRAM, parity-protected peripheral buffers (ePWM, eCAP, MibADC), and MPU-enforced access control for DMA, HTU, and debug interfaces.
Real-time timing is managed by two N2HET coprocessors (N2HET1: 32 channels; N2HET2: 18 channels), each with 160-word instruction RAM and hardware angle generation, plus seven ePWM modules supporting deadband and trip-zone protection synchronized to MibADC triggers - enabling deterministic motor control and encoder-based motion systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-R4F, 1.66 DMIPS/MHz, single/double-precision FPU, 12-region MPU |
| Max Clock Frequency | 180 MHz system clock - enables up to 298 DMIPS real-time performance |
| Flash Memory | 768 KB with ECC - supports safe firmware storage and over-the-air updates with error correction |
| RAM | 128 KB SRAM with ECC - provides fault-tolerant data workspace for safety-critical tasks |
| Analog-to-Digital | Two 12-bit MibADCs: ADC1 (24 ch), ADC2 (16 ch), 16 shared channels, 64-word parity-protected buffers each |
| Communication Interfaces | 3× DCAN (CAN 2.0A/B, 1 Mbps), 3× MibSPI (64-word parity buffers), 2× SCI (1 with LIN 2.1), 1× I2C (100/400 kbps) |
| Safety Features | Dual CPU lockstep, CPU/RAM BIST, FMPLL slip detection, voltage/clock monitors, ESM with nERROR pin |
Pinout & Package
RM44L520APZT is housed in a 100-pin LQFP (PZ) package measuring 14.0 mm × 14.0 mm, RoHS-compliant and green-qualified. Pin functions are multiplexed across GIO, analog, timer, communication, and power domains; primary I/O includes 45 GPIO (9 interrupt-capable), dual N2HET interfaces, and dedicated CAN, SPI, SCI, and ADC signal terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| nPORRST | Power-On Reset Input | Active-low asynchronous reset asserted during power ramp; disables all I/O buffers until release |
| nRST | Warm Reset Input | Active-low synchronous reset that preserves power domain states and initiates controlled restart sequence |
| nERROR | Error Signaling Output | Open-drain output driven low by ESM on detected fault - used for external system-level fail-safe response |
| GIOA[0]–GIOA[7] | General-Purpose I/O Bank A | 8 configurable pins with interrupt capability; default as digital I/O, multiplexable to ePWM, eCAP, N2HET, or MibSPI signals |
| AD1IN[0]–AD1IN[23] | MibADC1 Analog Inputs | 24-channel differential/single-ended input set; supports programmable sampling sequences and hardware-triggered conversions |
| CAN1RX / CAN1TX | Controller Area Network Channel 1 | Dedicated differential transceiver interface compliant with ISO 11898-1; supports 1 Mbps bit rate and message filtering via 64 mailboxes |
Key Features
| Feature | Design Value |
|---|---|
| Dual Lockstep Cortex-R4F CPUs | Hardware-synchronized execution with cycle-by-cycle result comparison and automatic fault escalation |
| ECC-Protected Memory Subsystem | 768KB flash + 128KB RAM with single-bit correction/double-bit detection - prevents silent data corruption |
| N2HET Timing Coprocessors | Two independent modules (32 + 18 channels) with 160-word instruction RAM each - offloads complex PWM, capture, and encoder timing from main CPU |
| Functional Safety Diagnostics | Built-in self-test (BIST) for CPU and RAM, FMPLL slip detection, clock/voltage monitors, and ESM-driven nERROR assertion |
| Real-Time Peripheral Synchronization | ePWM trip zones linked to MibADC event triggers; N2HET HTUs transfer timer data directly to RAM without CPU intervention |
Applications
| Industrial Safe PLCs | Turbine Control Systems |
|---|---|
Use Scenario: Logic execution and I/O monitoring in SIL-3-rated programmable logic controllers for factory automation. IC Role / Device Role / Timing Role: Primary safety controller executing certified runtime firmware with lockstep verification and diagnostic coverage. Use Value: Enables deterministic scan-cycle execution (<100 µs), dual-CPU fault detection, and ECC-protected program storage meeting IEC 61508 Part 3 requirements. |
Use Scenario: Real-time monitoring of generator speed, temperature, and vibration in wind turbine pitch and yaw control cabinets. IC Role / Device Role / Timing Role: Central timing and actuation controller interfacing with eQEP encoders, ePWM-driven servo valves, and CAN-connected sensor nodes. Use Value: N2HET-based hardware angle generation and ePWM deadband control ensure sub-microsecond timing accuracy for blade positioning under dynamic load conditions. |
| Medical Infusion Pumps | Robotic Surgery Actuators |
Use Scenario: Precision fluid delivery control with motor feedback, pressure sensing, and human-interface safety interlocks. IC Role / Device Role / Timing Role: Safety-managed motion controller running certified pump algorithm with redundant sensor processing and watchdog supervision. Use Value: Dual-CPU lockstep + BIST ensures continuous integrity verification of motor control loops and flow-rate calculations per ISO 13485 and IEC 62304. |
Use Scenario: High-bandwidth joint position control in surgical robots requiring synchronized multi-axis motion and torque limiting. IC Role / Device Role / Timing Role: Real-time motion coprocessor managing eQEP encoder inputs, ePWM current drivers, and CAN-based master coordination. Use Value: Hardware-accelerated quadrature decoding and N2HET-based pulse-width modulation reduce CPU load, enabling <50 µs control loop jitter for sub-millimeter positioning accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar safety microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RM44L920PGE | 1024KB ECC flash, 144-pin LQFP, full peripheral set (e.g., 24-channel MibADC2, 44 N2HET channels) | Supports larger firmware images and higher I/O count; required for designs needing >768KB code space or full ADC channel complement | Select RM44L920PGE when full RM44Lx20 feature set is needed; RM44L520APZT offers cost-optimized 100-pin footprint with verified SIL-3 capability. |
| RM46L852PGE | 220-MHz Cortex-R4F, 1280KB flash, EMAC, USB OHCI, higher temp grade (−40°C to 105°C same), but no LIN support | Targeted at networked industrial gateways and Ethernet-connected safety controllers - adds connectivity not present in RM44L520APZT | Choose RM46L852PGE for designs requiring Ethernet or USB host; RM44L520APZT remains optimal for CAN/LIN-based embedded safety nodes with strict pin-count constraints. |
Compared with RM44L920PGE and RM46L852PGE, the RM44L520APZT delivers certified SIL-3 functionality in a compact 100-pin LQFP with optimized peripheral count - reducing PCB area and BOM cost while retaining core safety mechanisms, N2HET timing, and CAN/LIN communication essential for distributed control nodes.
Availability
RM44L520APZT is available at Aetrix Electronics and suitable for industrial safety PLCs, turbine control systems, medical infusion pumps, and robotic surgery actuators requiring stable component supply across long-life production cycles.
Supply support for RM44L520APZT 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 RM44Lx20 product line was engineered specifically for IEC 61508 SIL-3 and ISO 26262 ASIL-D applications, integrating lockstep CPUs, ECC memory, and diagnostic accelerators to simplify safety certification in industrial automation and medical devices.
FAQ
What safety certifications apply to the RM44L520APZT?
The RM44L520APZT is designed to support IEC 61508 SIL-3 compliance through integrated hardware safety mechanisms including dual lockstep CPUs, ECC-protected memory, built-in self-test (BIST), and an Error Signaling Module (ESM) with nERROR output. TI provides safety documentation, FMEDA reports, and diagnostic software libraries - but final certification is achieved at the system level by the end equipment manufacturer.
Does the RM44L520APZT support CAN FD or only classical CAN?
The RM44L520APZT supports only classical Controller Area Network (CAN 2.0A and 2.0B) at up to 1 Mbps - it does not implement CAN FD protocol features such as flexible data-rate or extended payload. Its three DCAN modules provide 64 mailboxes each with parity protection, optimized for deterministic industrial networking rather than automotive high-speed data transport.
What is the difference between RM44L520APZT and RM44L520PGE?
The RM44L520APZT uses a 100-pin LQFP (PZ) package with 45 GPIO (9 interrupt-capable) and reduced peripheral count (e.g., MibADC2 limited to 16 channels), while the RM44L520PGE is a 144-pin LQFP variant offering full peripheral complement including 24-channel MibADC2 and 64 GPIO (16 interrupt-capable). Both share identical 768KB flash, 128KB RAM, and safety architecture.
Can the RM44L520APZT operate without external crystal?
Yes - the RM44L520APZT includes an internal oscillator and supports clock generation via its Frequency-Modulated PLL (FMPLL) using either an external crystal (via OSCIN/OSCOUT) or an external clock source applied to EXTCLKIN. The device also provides an ECLK output for external frequency monitoring, making it adaptable to crystal-less or crystal-redundant safety architectures.
Is LIN 2.1 support available on both SCI interfaces of the RM44L520APZT?
No - only one of the two SCI interfaces (SCI1) supports LIN 2.1 functionality on the RM44L520APZT; the second SCI (SCI2) operates exclusively in standard UART mode. This matches the device's specification in Table 3-1 and Section 1.1, where "2 (1 with LIN)" denotes dual SCI with LIN capability on a single channel - confirmed in the PZ package signal descriptions.
RM44L520APZT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- 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:
- 120MHz
- Connectivity:
- CANbus, LINbus, MibSPI, SCI, SPI, UART/USART
- Peripherals:
- DMA, POR, PWM, WDT
- Number of I/O:
- 45
- Program Memory Size:
- 768KB (768K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 64K x 8
- RAM Size:
- 128K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.14V ~ 3.6V
- Data Converters:
- A/D 16x12b
- Oscillator Type:
- External
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
RM44L520APZT FAQ
1.How can I place an order for RM44L520APZT through Aetrix?
Please submit a Request for Quotation (RFQ) for RM44L520APZT 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 RM44L520APZT reliable?
The price and inventory of RM44L520APZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RM44L520APZT is usually 5 days.
3.What payment methods are accepted for RM44L520APZT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RM44L520APZT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RM44L520APZT?
RM44L520APZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RM44L520APZT 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 RM44L520APZT?
For technical support, including RM44L520APZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RM44L520APZT requirements.
6.How does Aetrix verify that RM44L520APZT is sourced from the original manufacturer or authorized distributors?
All RM44L520APZT 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 RM44L520APZT meets industry standards.
7.What is the process for return or replacement of RM44L520APZT?
All RM44L520APZT units undergo pre-shipment inspection (PSI). If there is an issue with RM44L520APZT, 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 RM44L520APZT part is unused and in its original packaging.
Return procedure for RM44L520APZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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