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NXP Semiconductors PXAC37KFA/00,512
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- Part No.:
- PXAC37KFA/00,512
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
PXAC37KFA/00,512.pdf
- Description:
- IC MCU 16BIT 32KB OTP 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,387
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Product details
Overview
PXAC37KFA/00,512 from NXP Semiconductors (formerly Philips Semiconductors) is a 16-bit OTP microcontroller optimized as a CAN transport layer co-processor. It integrates 32 KB on-chip program memory, 1024 bytes of data RAM, CAN 2.0B controller with 32 ID filters, one UART, one SPI port, and hardware-accelerated message handling for OSEK, DeviceNet, and CANopen protocols - deployed in automotive body control modules requiring deterministic CAN message assembly and fragmentation.
For engineers reviewing the PXAC37KFA/00,512 datasheet, PXAC37KFA/00,512 pinout, PXAC37KFA/00,512 application, or PXAC37KFA/00,512 equivalent, this device is selected for embedded CAN gateway functions where offloading transport-layer processing from host MCUs reduces software overhead, improves timing predictability, and enables compliance with automotive communication stacks without full-stack software implementation.
Technical Context
The PXAC37KFA/00,512 implements a dedicated CAN Core Block (CCB) with dual-mode operation (normal and test), programmable bus timing via CANBTR register, and synchronized sample point positioning per ISO 11898. Its transport layer co-processor logic handles message object management, acceptance filtering, fragmented frame assembly/disassembly, and RTR frame handling independently of the main CPU core.
It supports two CAN arbitration modes (priority-based and object-number-based pre-arbitration), includes dedicated interrupt sources for Rx/Tx completion, buffer overflow, fragmentation error, and bus state transitions (Error Warning/Passive/Bus Off), and uses semaphore bits (SEM0/SEM1) to prevent data corruption during concurrent access to transmit message objects.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Architecture | 16-bit XA core with instruction set compatible with Intel 8051 derivatives - enables reuse of legacy firmware toolchains and peripheral drivers. |
| Memory | 32 KB OTP program memory + 1024 B on-chip RAM - provides non-volatile, tamper-resistant code storage suitable for production automotive ECUs. |
| CAN Interface | CAN 2.0B compliant with 32 configurable ID filters and hardware-accelerated transport layer - eliminates need for host MCU to parse standard/extended frames or manage segmented messages. |
| Peripherals | 1 UART (with 9-bit mode, multiprocessor support), 1 SPI port, watchdog timer, 3 timers (T0/T1/T2) - enables diagnostics, flash programming, and time-critical control tasks alongside CAN traffic. |
| Interrupt System | Dedicated CAN-related SFRs including CANINTFLG, MCIR, MEIR, and FESTR - allows precise fault isolation and real-time response to bus errors, message completion, and buffer events. |
| Power Modes | Idle and Power-Down modes with CAN Sleep Enable - supports low-power wake-on-CAN while retaining message filtering capability during standby. |
Pinout & Package
This device is packaged in a 44-pin LQFP (Leadless Quad Flat Package) with 0.8 mm pitch, thermally enhanced for automotive under-hood environments. Pin assignments follow standard XA-C3 architecture with dedicated CANH/CANL differential I/O, dual reset inputs (RST and RST/), and multiplexed address/data bus for external memory expansion.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CANH | CAN High differential output | Drives dominant/recessive states on CAN bus; requires external 120 Ω termination at network ends. |
| CANL | CAN Low differential output | Complements CANH; differential voltage swing defines bus state per ISO 11898-2 physical layer. |
| RST | Active-low reset input | Asynchronous hardware reset; initiates power-on sequence and clears all registers and message buffers. |
| RST/ | Reset input with internal pull-up | Alternative reset path supporting watchdog-triggered recovery without external circuitry. |
| XTAL1/XTAL2 | Crystal oscillator inputs | Supports 1–20 MHz crystal; determines system clock frequency and directly impacts CAN bit timing accuracy. |
| P0.0–P0.7 | Port 0 bidirectional I/O | Multiplexed as lower address/data bus (AD0–AD7) in external memory mode; configured as general-purpose I/O otherwise. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware Transport Layer Engine | Offloads OSEK ConsecutiveFrame, DeviceNet I/O Message, and CANopen domain segment handling - eliminates 3–5 ms of CPU overhead per fragmented message in host MCU software stacks. |
| 32-Entry Acceptance Filter Bank | Configurable via MMRs to accept standard/extended IDs with mask-based matching - enables selective reception of up to 32 unique message identifiers without software polling. |
| Dual CAN Arbitration Modes | Priority-based (default) and object-number-based pre-arbitration - supports deterministic scheduling of high-priority messages (e.g., safety-critical alerts) ahead of lower-priority telemetry. |
| Semaphore-Controlled Message Objects | SEM0/SEM1 bits prevent race conditions during concurrent Tx object updates - ensures atomic write access to message buffers in multi-threaded or interrupt-driven applications. |
| Integrated CAN Bus Timing Control | CANBTR register configures SJW, BRP, TSEG1, TSEG2 for precise bit timing compliance - achieves ±1% sample point accuracy across temperature and voltage ranges per ISO 11898-1. |
Applications
| Automotive Body Control Module | Industrial CAN Gateway |
|---|---|
Use Scenario: Centralized lighting, door lock, and window control ECU communicating with distributed sensors and actuators over CAN. IC Role / Device Role / Timing Role: Dedicated transport-layer co-processor managing segmented CANopen PDOs and SDO transfers between LIN subnets and main CAN backbone. Use Value: Reduces host MCU load by >40% during peak message throughput (≥200 msg/s), enabling use of cost-optimized 8-bit hosts while maintaining ASAM-compliant diagnostics. |
Use Scenario: Protocol translation between DeviceNet field devices and Modbus TCP supervisory systems in factory automation. IC Role / Device Role / Timing Role: Standalone CAN message handler converting DeviceNet I/O messages into standardized CAN frames with configurable ID mapping and payload reassembly. Use Value: Eliminates need for FPGA or dual-MCU designs; supports hot-swappable node addressing via CANopen NMT commands without host intervention. |
| Heavy-Duty Vehicle Telematics Hub | Off-Highway Equipment Diagnostics |
Use Scenario: Aggregating J1939 diagnostic messages from engine, transmission, and ABS ECUs for remote fleet monitoring. IC Role / Device Role / Timing Role: CAN transport layer co-processor performing J1939 PGN segmentation, flow control, and priority-based arbitration before forwarding to cellular modem interface. Use Value: Guarantees <50 µs latency for critical fault codes (e.g., engine derate requests), meeting SAE J1939-21 timing requirements for Class A messages. |
Use Scenario: Diagnostic interface in agricultural tractors supporting ISO 11783 (ISOBUS) virtual terminals and task controllers. IC Role / Device Role / Timing Role: Hardware-accelerated ISOBUS message handler managing VT-to-ECU communications, including fragmented parameter group number (PGN) exchanges. Use Value: Enables deterministic response to VT button presses (<100 ms) even during concurrent GPS/NMEA and CAN traffic, satisfying ISO 11783-6 real-time constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CAN transport layer co-processor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NXP SJA1000T | Standalone CAN controller (no integrated transport layer); requires external MCU for message assembly and protocol handling. | Lacks hardware OSEK/CANopen support; increases host firmware complexity and validation effort for certified automotive stacks. | Select when existing host MCU has spare processing bandwidth and full-stack software already qualified. |
| Infineon TLE9879QXA40 | ARM Cortex-M3-based SoC with integrated CAN FD controller, motor drivers, and LIN transceiver - higher integration but no dedicated transport-layer acceleration. | Supports CAN FD and higher data rates (5 Mbps), but lacks hardware message fragmentation logic for legacy CAN 2.0B transport layers. | Select for new designs targeting CAN FD migration and integrated power stages; not drop-in for legacy PXAC37KFA/00,512 deployments. |
Compared with PXAC37KFA/00,512, the SJA1000T shifts transport-layer responsibility entirely to software, increasing development time and runtime uncertainty, while the TLE9879QXA40 offers modern peripherals but removes the deterministic hardware acceleration that makes PXAC37KFA/00,512 uniquely suited for certified OSEK/DeviceNet implementations.
Availability
PXAC37KFA/00,512 is available at Aetrix Electronics and suitable for automotive body control modules, industrial CAN gateways, heavy-duty vehicle telematics hubs, and off-highway equipment diagnostics requiring stable component supply across extended product lifecycles.
Supply support for PXAC37KFA/00,512 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
NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with roots in Philips' semiconductor division.
The XA-C3 product line was engineered specifically to offload CAN transport-layer processing from host microcontrollers in safety-critical and real-time automotive networks, targeting OSEK, DeviceNet, and CANopen compliance without software stack licensing or certification overhead.
FAQ
What is the primary function of the PXAC37KFA/00,512 in a CAN network?
The PXAC37KFA/00,512 serves as a dedicated CAN transport layer co-processor, handling message object management, acceptance filtering, fragmented frame assembly/disassembly, and protocol-specific operations (OSEK, DeviceNet, CANopen) independently of the host MCU. This relieves the main processor from time-critical CAN software stack execution, ensuring deterministic timing and reducing firmware validation scope. The PXAC37KFA/00,512 is not a general-purpose microcontroller but a purpose-built accelerator for CAN communication layers.
Does the PXAC37KFA/00,512 support CAN FD or only classical CAN 2.0B?
The PXAC37KFA/00,512 supports CAN 2.0B exclusively - it does not implement CAN FD features such as flexible data-rate, larger payloads, or improved error detection. Its CAN Core Block (CCB) complies fully with ISO 11898-1:1993 and supports both standard (11-bit) and extended (29-bit) identifier formats, 32 configurable ID filters, and hardware-accelerated message handling for legacy transport protocols. For CAN FD migration, a different platform like the NXP S32K series would be required.
How does the PXAC37KFA/00,512 handle message fragmentation and reassembly?
The PXAC37KFA/00,512 implements hardware-based message fragmentation and reassembly using its CAN/CTL Message Handler, which supports OSEK ConsecutiveFrame, DeviceNet I/O Message, and CANopen Download Domain Segment protocols. It manages message objects with automatic segmentation, flow control negotiation, timeout handling, and CRC verification - all without host MCU intervention. The PXAC37KFA/00,512 uses dedicated SFRs (MCIR, MEIR) and interrupts to signal completion or errors, enabling zero-copy message transfer between CAN bus and host memory.
What package type and pin count does the PXAC37KFA/00,512 use?
The PXAC37KFA/00,512 is supplied in a 44-pin LQFP (Low-profile Quad Flat Package) with 0.8 mm lead pitch, conforming to JEDEC MO-220 standards. This package provides thermal performance suitable for automotive under-dash environments and supports external memory expansion via multiplexed address/data bus (P0.0–P0.7). The pinout includes dedicated CANH/CANL differential I/O, dual reset inputs (RST and RST/), and crystal oscillator connections (XTAL1/XTAL2), all documented in the official Philips Semiconductors preliminary specification dated 2000 Jan 25.
Is the 32 KB program memory in the PXAC37KFA/00,512 reprogrammable or one-time programmable?
The 32 KB program memory in the PXAC37KFA/00,512 is One-Time Programmable (OTP), meaning it can be written once during manufacturing or final test and cannot be erased or rewritten in the field. This design ensures firmware integrity and resistance to unauthorized modification - a key requirement for automotive safety-critical applications. Configuration data and runtime variables reside in the separate 1024-byte on-chip RAM, which remains fully read/write during operation. The PXAC37KFA/00,512 does not include Flash or EEPROM for code storage.
PXAC37KFA/00,512 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 44-LCC (J-Lead)
- Series:
- XA
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- XA
- Core Size:
- 16-Bit
- Speed:
- 32MHz
- Connectivity:
- CANbus, EBI/EMI, SPI, UART/USART
- Peripherals:
- DMA, POR, PWM, WDT
- Number of I/O:
- 32
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- OTP
- EEPROM Size:
- -
- RAM Size:
- 1K x 8
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 5.5V
- Data Converters:
- -
- Oscillator Type:
- External
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
PXAC37KFA/00,512 FAQ
1.How can I place an order for PXAC37KFA/00,512 through Aetrix?
Please submit a Request for Quotation (RFQ) for PXAC37KFA/00,512 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 PXAC37KFA/00,512 reliable?
The price and inventory of PXAC37KFA/00,512 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PXAC37KFA/00,512 is usually 5 days.
3.What payment methods are accepted for PXAC37KFA/00,512?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PXAC37KFA/00,512 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PXAC37KFA/00,512?
PXAC37KFA/00,512 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PXAC37KFA/00,512 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 PXAC37KFA/00,512?
For technical support, including PXAC37KFA/00,512 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PXAC37KFA/00,512 requirements.
6.How does Aetrix verify that PXAC37KFA/00,512 is sourced from the original manufacturer or authorized distributors?
All PXAC37KFA/00,512 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 PXAC37KFA/00,512 meets industry standards.
7.What is the process for return or replacement of PXAC37KFA/00,512?
All PXAC37KFA/00,512 units undergo pre-shipment inspection (PSI). If there is an issue with PXAC37KFA/00,512, 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 PXAC37KFA/00,512 part is unused and in its original packaging.
Return procedure for PXAC37KFA/00,512:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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