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Texas Instruments RM48L952ZWTT
- Part No.:
- RM48L952ZWTT
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 337-LFBGA
- Datasheet:
-
RM48L952ZWTT.pdf
- Description:
- IC MCU 16/32B 3MB FLASH 337NFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,794
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Product details
Overview
RM48L952ZWTT from Texas Instruments is a safety-certified 32-bit ARM Cortex-R4F microcontroller with dual lockstep CPUs, 3 MB flash (ECC), 256 KB RAM (ECC), and integrated peripherals including three DCAN controllers, two 12-bit MibADCs (24 total channels), two N2HET timing coprocessors, 10/100 Mbps EMAC, USB 2.0 host/device, and IEEE 802.3-compliant Ethernet - designed for industrial safety PLCs and medical ventilators.
For engineers reviewing the RM48L952ZWTT datasheet, RM48L952ZWTT pinout, RM48L952ZWTT application, or RM48L952ZWTT equivalent, this page delivers verified technical context, package-specific pin mapping (337-ball NFBGA), functional safety architecture details, real-time control peripheral specifications, and validated alternative options for safety-critical system design.
Technical Context
The RM48L952ZWTT implements a dual-CPU lockstep architecture with BIST, ECC on flash/RAM, parity-protected peripheral memories, and error signaling via dedicated nERROR pin - meeting IEC 61508 SIL-3 and ISO 26262 ASIL-D requirements. Its FMPLL clock system supports up to 220 MHz operation with voltage/clock monitoring and slip detection.
Real-time control is enabled by two N2HET modules (N2HET1: 32 channels; N2HET2: 18 channels), each with hardware angle generator and dedicated HTU+MPU for DMA-like transfers. The device integrates two 12-bit MibADCs sharing 16 channels, 64-word parity-protected buffers, and configurable group sequencing - supporting both single-shot and continuous conversion modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-R4F with FPU, 220 MHz max, 365 DMIPS - enables deterministic real-time execution in safety-critical loops. |
| Flash Memory | 3 MB with ECC - ensures data integrity across power cycles and radiation events in industrial environments. |
| RAM | 256 KB SRAM with ECC - protects runtime variables and stack against bit flips during operation. |
| ADC Resolution | 12-bit MibADC1 (24 ch) + MibADC2 (16 shared ch) - supports high-fidelity sensor acquisition for closed-loop motor or infusion control. |
| N2HET Channels | N2HET1: 32 programmable channels; N2HET2: 18 channels - provides independent, software-defined timing for PWM, capture, GPIO, and actuator drive. |
| Communication | 3× DCAN (CAN 2.0B, 1 Mbps), 1× EMAC (MII/RMII/MDIO), 2× USB (OHCI host + device), 3× MibSPI, 2× SPI, 2× SCI, 1× LIN, 1× I²C - enables robust multi-bus networking in distributed safety systems. |
| Safety Features | Dual lockstep CPUs, CPU/RAM BIST, ESM with nERROR pin, voltage/clock monitors, memory protection units - satisfies diagnostic coverage requirements for SIL-3/ASIL-D certification. |
Pinout & Package
RM48L952ZWTT uses a 337-ball NFBGA (ZWT) package with 16.0 mm × 16.0 mm body size and 0.8 mm ball pitch. Ball functions include dedicated safety monitoring pins (nERROR, nPORRST), EMIF signals for SDRAM expansion, and multiplexed I/O supporting GPIO, ADC, CAN, SPI, and N2HET functions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| nERROR | Error signaling output | Active-low open-drain fault indicator tied to external watchdog or system supervisor - asserts on detected ECC double-bit error, BIST failure, or clock/voltage violation. |
| nPORRST | Power-on reset input | Asynchronous reset asserted low during power ramp; initiates full internal reset sequence including BIST and memory initialization. |
| VCC / VSS | Core power / ground | 1.2 V nominal core supply (1.14–1.32 V range); requires tight regulation and decoupling per TI layout guidelines to maintain lockstep timing integrity. |
| VCCIO / VSS | I/O power / ground | 3.3 V nominal I/O supply (3.0–3.6 V range); powers all digital I/O banks, EMAC PHY interface, and USB transceivers. |
| AD1IN[0]–AD1IN[23] | Analog input (MibADC1) | 24 dedicated analog inputs with internal 12-bit SAR conversion; supports simultaneous sampling across groups using hardware triggers. |
| CAN1_TX / CAN1_RX | CAN bus differential pair | Direct connection to external CAN transceiver; supports 1 Mbps operation with built-in loopback test mode for production diagnostics. |
| MIBSPI1_SIMO / SOMI / CLK | SPI master interface | Full-duplex synchronous serial interface for connecting to sensors, EEPROMs, or FPGA configuration memory - supports programmable clock polarity and phase. |
| N2HET1[0]–N2HET1[31] | N2HET1 I/O bank | 32 programmable pins supporting PWM generation, edge capture, or GPIO - each with configurable slew rate and pull-up/down for noise immunity in industrial settings. |
Key Features
| Feature | Design Value |
|---|---|
| Dual lockstep Cortex-R4F CPUs | Hardware-enforced instruction-level comparison detects transient faults; triggers ESM response without software intervention. |
| ECC on 3 MB flash & 256 KB RAM | Single-bit correction and double-bit detection prevents silent data corruption in program code and runtime variables over 10+ year field life. |
| Two N2HET timing coprocessors | Offloads precise waveform generation (e.g., motor commutation, valve timing) from main CPU - improves determinism and reduces ISR latency. |
| EMAC with MII/RMII/MDIO | Enables deterministic Ethernet communication for time-sensitive protocols like EtherCAT or PROFINET IRT without external PHY arbitration logic. |
| USB 2.0 OHCI host + device controller | Supports plug-and-play field service via USB mass storage or CDC ACM - eliminates need for separate programming/debug interfaces. |
| Parameter Overlay Module (POM) | Allows dynamic rerouting of flash reads to RAM during runtime - enables field calibration updates without firmware reflash or system downtime. |
Applications
| Industrial Safety PLCs | Medical Ventilators |
|---|---|
Use Scenario: High-integrity programmable logic controller executing safety shutdown logic in hazardous chemical plants. IC Role / Device Role / Timing Role: Primary safety controller executing SIL-3 certified ladder logic with dual-CPU lockstep verification and periodic BIST. Use Value: ECC memory and nERROR pin enable immediate safe state transition upon detected fault - meeting IEC 61511 requirement for <100 ms reaction time. | Use Scenario: Closed-loop pressure and flow control in critical-care ventilator systems requiring ASIL-D compliance. IC Role / Device Role / Timing Role: Real-time sensor fusion hub processing ADC inputs from pressure transducers and driving N2HET-controlled solenoid valves. Use Value: Deterministic N2HET timing ensures sub-microsecond valve actuation precision - maintaining tidal volume accuracy within ±2% tolerance. |
| Power Generation Controllers | Robotic Surgery Systems |
Use Scenario: Turbine governor control in wind/solar inverters where grid synchronization demands microsecond timing accuracy. IC Role / Device Role / Timing Role: Synchronized EMAC and N2HET modules coordinate grid-phase tracking and PWM gate drive timing. Use Value: Integrated 10/100 EMAC with hardware timestamping eliminates external PHY jitter - enabling IEEE 1588 PTP synchronization at <100 ns deviation. | Use Scenario: Motion control subsystem in robotic surgical arms requiring fail-safe joint position monitoring and torque limiting. IC Role / Device Role / Timing Role: Dual ADC acquisition of motor current and encoder feedback with lockstep CPU validation of torque limits. Use Value: On-chip ECC RAM preserves encoder counter values during EMI events - preventing uncommanded motion that could breach surgical safety envelopes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar safety microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RM48L950ZWT | Same package and core, but 2 MB flash (vs. 3 MB) and no EMAC module. | Not suitable for Ethernet-connected safety systems; limited for complex HMI or firmware-over-the-air update storage. | Select when Ethernet is unnecessary and cost optimization is prioritized over future firmware scalability. |
| RM57L843ZWT | ARM Cortex-R5F core, 333 MHz, 4 MB flash, 512 KB RAM, 4 CAN, no EMAC, no USB device. | Higher performance for algorithm-intensive tasks (e.g., predictive maintenance), but lacks USB device for field service. | Choose for compute-heavy safety analytics where Ethernet is replaced by CAN FD or proprietary wired interface. |
Compared with RM48L950ZWT and RM57L843ZWT, the RM48L952ZWTT uniquely balances Ethernet connectivity, USB device capability, and 3 MB flash - making it optimal for safety systems requiring remote diagnostics, firmware updates, and deterministic networked control without sacrificing ASIL-D compliance.
Availability
RM48L952ZWTT is available at Aetrix Electronics and suitable for industrial safety PLCs, medical ventilators, power generation controllers, and robotic surgery systems requiring stable component supply and long-term lifecycle support.
Supply support for RM48L952ZWTT 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 decades of automotive and industrial safety expertise.
The RM48L952ZWTT belongs to TI's Hercules™ safety microcontroller family, engineered specifically for IEC 61508 SIL-3 and ISO 26262 ASIL-D applications - emphasizing hardware-based fault detection, memory protection, and deterministic real-time control.
FAQ
What safety certifications does the RM48L952ZWTT support?
The RM48L952ZWTT is architected to meet IEC 61508 SIL-3 and ISO 26262 ASIL-D requirements. Its dual lockstep CPUs, ECC memory, BIST logic, ESM with nERROR pin, and voltage/clock monitors provide the hardware foundation for certified safety applications. Certification documentation and FMEDA reports are available from Texas Instruments' Hercules Safety Manual - not inherent to the RM48L952ZWTT silicon alone but enabled by its integrated safety features.
Does the RM48L952ZWTT support Ethernet PHY interfacing without external components?
No, the RM48L952ZWTT includes only the Ethernet MAC (EMAC) layer and requires an external PHY chip for physical-layer signaling. It supports MII, RMII, and MDIO interfaces - allowing flexible PHY selection (e.g., DP83848, LAN8742A) while maintaining full IEEE 802.3 compliance. The RM48L952ZWTT does not integrate a PHY, so external magnetics and PHY IC are mandatory for 10/100 Mbps operation.
How many ADC channels are available on the RM48L952ZWTT, and how are they allocated?
The RM48L952ZWTT integrates two 12-bit MibADC modules: MibADC1 with 24 dedicated channels (AD1IN[0]–AD1IN[23]), and MibADC2 with 16 channels shared with MibADC1 (AD2IN[0]–AD2IN[15]). This yields 24 unique analog inputs, with 16 usable by either ADC depending on configuration. Both modules feature 64-word parity-protected result buffers and support grouped sequential conversions triggered by software, timers, or external events.
Can the RM48L952ZWTT's N2HET modules replace traditional PWM peripherals in motor control?
Yes - the RM48L952ZWTT's two N2HET modules (N2HET1: 32 channels; N2HET2: 18 channels) are purpose-built for advanced timing tasks including high-resolution PWM generation, edge capture, and GPIO control. Each channel operates independently with hardware angle generation and HTU-assisted memory transfers, enabling precise motor commutation timing without CPU overhead - surpassing conventional PWM peripherals in flexibility and determinism for BLDC or servo applications.
Is the RM48L952ZWTT pin-compatible with other devices in the RM48L family?
The RM48L952ZWTT in the ZWT package shares identical ball-out with RM48L950ZWT and RM48L750ZWT, enabling PCB reuse across variants. However, signal functionality differs - e.g., RM48L950ZWT omits EMAC signals, and RM48L750ZWT reduces flash to 2 MB. Pin compatibility is mechanical only; electrical and functional compatibility must be verified per application requirements and TI's RM48x Device Comparison Table.
RM48L952ZWTT 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:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-R4F
- Core Size:
- 16/32-Bit
- Speed:
- 220MHz
- Connectivity:
- CANbus, EBI/EMI, Ethernet, I2C, LINbus, MibSPI, SCI, SPI, UART/USART, USB
- 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:
RM48L952ZWTT FAQ
1.How can I place an order for RM48L952ZWTT through Aetrix?
Please submit a Request for Quotation (RFQ) for RM48L952ZWTT 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 RM48L952ZWTT reliable?
The price and inventory of RM48L952ZWTT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RM48L952ZWTT is usually 5 days.
3.What payment methods are accepted for RM48L952ZWTT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RM48L952ZWTT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RM48L952ZWTT?
RM48L952ZWTT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RM48L952ZWTT 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 RM48L952ZWTT?
For technical support, including RM48L952ZWTT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RM48L952ZWTT requirements.
6.How does Aetrix verify that RM48L952ZWTT is sourced from the original manufacturer or authorized distributors?
All RM48L952ZWTT 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 RM48L952ZWTT meets industry standards.
7.What is the process for return or replacement of RM48L952ZWTT?
All RM48L952ZWTT units undergo pre-shipment inspection (PSI). If there is an issue with RM48L952ZWTT, 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 RM48L952ZWTT part is unused and in its original packaging.
Return procedure for RM48L952ZWTT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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