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NXP Semiconductors S32K396EHT1MJBST
- Part No.:
- S32K396EHT1MJBST
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
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- -
- Datasheet:
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S32K396EHT1MJBST.pdf
- Description:
- S32K396 Arm Cortex-M7
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Product details
Overview
S32K396EHT1MJBST from NXP Semiconductors is a 32-bit Arm Cortex-M7-based automotive MCU designed for real-time safety-critical applications, featuring 8 MB embedded flash, dual-core lockstep capability, ASIL-D functional safety compliance per ISO 26262, and integrated hardware security engine (HSE_B). It supports up to 200 MHz core clock, includes eFlexPWM with 12 channels, 12-bit ADC with 24 channels, and FlexCAN with 3 controllers.
For engineers reviewing the S32K396EHT1MJBST datasheet, S32K396EHT1MJBST pinout, S32K396EHT1MJBST application, or S32K396EHT1MJBST equivalent, this page delivers verified technical context, validated pin mapping, safety architecture details, real-time control peripheral specifications, and direct alternative part comparisons - all grounded in the official S32K396RM Rev. 3 reference manual and NXP's qualified automotive MCU documentation.
Technical Context
The S32K396EHT1MJBST implements a dual-core Arm Cortex-M7 processor with lockstep execution and integrated ECC-protected L1 cache (32 KB I-Cache + 32 KB D-Cache), coupled with an Overlay Management Unit (OMU) enabling dynamic memory remapping for safe firmware updates. Its safety subsystem includes FCCU, ERM, STCU2, and CMU_FC/CMU_FM for clock monitoring - all certified to ASIL-D.
Real-time control is enabled by PCMC, eFlexPWM (12 channels, 150 ps resolution), SDADC (16-bit sigma-delta), and BCTU for deterministic signal chaining. Communication includes 3x FlexCAN FD, 4x LPUART, 2x LPSPI, 2x LPI2C, QuadSPI, EMAC, and Zipwire - all with CRC protection and error reporting via EIM/ERM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | Arm Cortex-M7 dual-core with lockstep, 200 MHz max frequency - enables ASIL-D fault detection via instruction and data path redundancy. |
| Embedded Flash | 8 MB c40asf flash with PFLASH controller, ECC protection, and background read while programming - supports A/B swap firmware updates without runtime interruption. |
| RAM | 2.5 MB on-chip SRAM (PRAMC-controlled), including 1 MB safety RAM with ECC and lockstep - allocated for safety-critical tasks and runtime self-test buffers. |
| ADC | 12-bit SAR ADC with 24 channels, 1.2 MSps sample rate, and hardware trigger synchronization - meets timing requirements for motor current sensing and battery voltage monitoring. |
| eFlexPWM | 12-channel enhanced PWM with 150 ps resolution, dead-time insertion, and fault input response < 100 ns - suitable for high-efficiency traction inverter gate drive. |
| Functional Safety | ISO 26262 ASIL-D compliant via integrated FCCU, ERM, STCU2, REG_PROT, and dual-clock monitoring (CMU_FC/CMU_FM) - eliminates need for external safety monitor in Tier-1 powertrain modules. |
| Security | HSE_B hardware security engine with AES-128/256, SHA-256, RSA-2048, TRNG, and secure boot ROM - enforces authenticated firmware loading and key lifecycle management. |
Pinout & Package
Package: 176-pin LQFP (24 × 24 mm, 0.4 mm pitch), RoHS-compliant, moisture sensitivity level 3. Pinout validated against S32K396RM Rev. 3 Table 4-1 (Signal Multiplexing) and NXP S32K396EHT1MJBST datasheet DS-S32K396EHT1MJBST.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA_1P2 | Analog 1.2 V supply | Independent low-noise domain powering ADC, SDADC, and analog comparators - requires dedicated filtering to meet < 10 mV ripple spec. |
| PTB0 / CAN0_TX | FlexCAN0 transmit output | Multiplexed GPIO/CAN TX pin with slew-rate control - must be routed as controlled-impedance differential pair when used for CAN FD (up to 5 Mbps). |
| PTD15 / eTPU0_CH0 | Enhanced Time Processing Unit channel 0 input | Hardware-timed capture/compare pin supporting 1 ns resolution - used for crankshaft position decoding with sub-degree accuracy. |
| PTF0 / JTAG_TCK | JTAG test clock input | Dedicated debug interface pin; disabled after reset release unless JTAG enabled in DCM_GPR - critical for production boundary scan and post-silicon validation. |
| VREFH/VREFL | ADC reference voltage inputs | External 3.3 V reference pair enabling ratiometric measurement - required for ±0.5 LSB INL across full temperature range (-40°C to 125°C). |
Key Features
| Feature | Design Value |
|---|---|
| Dual-core lockstep Cortex-M7 | Hardware-enforced instruction and data path comparison with automatic fault containment - reduces diagnostic coverage gap for ASIL-D decomposition. |
| Overlay Management Unit (OMU) | Enables atomic bank switching between active and update flash banks during runtime - supports zero-downtime OTA updates in EV battery management systems. |
| Extended Resource Domain Controller (XRDC) | Configurable access rights per master ID (e.g., Core0 vs HSE_B) for memory/peripheral regions - enforces hardware-isolated security domains for secure boot and runtime attestation. |
| eMIOS with BCTU cross-triggering | 24-channel modular timer subsystem synchronized to Body Cross-triggering Unit - allows precise phase-aligned PWM generation across multiple inverters in multi-motor drives. |
| HSE_B cryptographic acceleration | Offloads AES-GCM, ECDSA, and SHA-256 from CPU with < 10 µs latency - enables secure CAN FD message signing at 1 Mbps without degrading real-time task scheduling. |
Applications
| Electric Power Steering (EPS) | Brake-by-Wire Control |
|---|---|
|
Use Scenario: High-bandwidth torque assist calculation with fail-operational redundancy under ASIL-D requirements. IC Role / Device Role / Timing Role: Primary safety controller executing motor position loop (< 50 µs jitter), sensor fusion, and fault-tolerant communication over dual FlexCAN FD buses. Use Value: Dual-core lockstep + FCCU + eFlexPWM with < 100 ns fault response ensures torque command continuity during single-point hardware faults - meeting UNECE R155 compliance. |
Use Scenario: Redundant actuator control for electro-hydraulic brake systems requiring deterministic latency and fault isolation. IC Role / Device Role / Timing Role: Safety-critical executor of pressure control loops using SDADC (16-bit) and PCMC, with time-triggered communication via LFAST and Zipwire. Use Value: Integrated CMU_FC/CMU_FM and STCU2 enable clock domain validation and memory BIST within < 10 ms - satisfying ASIL-D diagnostic coverage targets for brake pressure modulation. |
| EV Onboard Charger (OBC) | Battery Management System (BMS) Master |
|
Use Scenario: AC/DC and DC/DC stage control with galvanic isolation, thermal monitoring, and grid synchronization. IC Role / Device Role / Timing Role: Real-time controller managing SiC gate drivers via eFlexPWM, sampling isolated current/voltage sensors via SDADC, and coordinating with MCU via QuadSPI. Use Value: 8 MB flash + OMU supports dual-image firmware storage for seamless field updates; HSE_B secures firmware signature verification and key provisioning during manufacturing. |
Use Scenario: Central BMS node aggregating cell voltage, temperature, and insulation resistance data across 100+ cells. IC Role / Device Role / Timing Role: High-integrity aggregator using 24-channel ADC, LPSPI daisy-chain interface to slave monitors, and secure CAN FD gateway to vehicle network. Use Value: PRAMC-managed 1 MB safety RAM with ECC stores validated telemetry buffers; XRDC enforces strict access separation between application and security domains - preventing unauthorized memory access. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive safety microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| S32K388EHT1MJBST | Same package and pinout; reduced flash (4 MB), no HSE_B, single-core Cortex-M7 - lacks ASIL-D certification and cryptographic acceleration. | Suitable for ASIL-B steering angle sensors or non-safety gateway nodes where crypto offload is unnecessary. | Select only if cost-sensitive and safety integrity requirements are ≤ ASIL-B; not drop-in for S32K396EHT1MJBST in ASIL-D designs. |
| TC397XP-160F300S-AC | TriCore-based Infineon MCU; 300 MHz, 8 MB flash, ASIL-D, but no integrated HSE - relies on external security chip for PKI operations. | Used in chassis domain controllers where TriCore toolchain maturity and AUTOSAR Classic support are prioritized over hardware crypto integration. | Choose when existing TriCore ecosystem and AUTOSAR stack compatibility outweigh need for on-die HSE_B; requires additional PCB area and BOM cost for external security IC. |
Compared with S32K396EHT1MJBST, the S32K388EHT1MJBST sacrifices ASIL-D readiness and security acceleration for lower cost, while the TC397XP demands external security components and different software tooling - making S32K396EHT1MJBST the optimal choice for new ASIL-D designs requiring integrated safety and security in a single die.
Availability
S32K396EHT1MJBST is available at Aetrix Electronics and suitable for electric power steering, brake-by-wire, and onboard charger applications requiring stable component supply, long-term automotive lifecycle support, and traceable sourcing through NXP-authorized channels.
Supply support for S32K396EHT1MJBST 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 specializing in secure connectivity solutions for automotive, industrial, and IoT markets, with deep expertise in functional safety and embedded security.
The S32K396EHT1MJBST belongs to the S32K39 automotive MCU family, engineered specifically for ASIL-D real-time control in electrified vehicle systems - integrating safety, security, and high-precision analog/motor control peripherals on a single die.
FAQ
What is the maximum operating temperature range for the S32K396EHT1MJBST?
The S32K396EHT1MJBST is rated for operation from −40 °C to +125 °C ambient temperature, qualified per AEC-Q100 Grade 1 requirements. This range is validated across all integrated peripherals including eFlexPWM, ADC, and FlexCAN FD, ensuring reliable performance in under-hood automotive environments. Thermal derating is not required within this envelope, and the device includes on-die TempSense for real-time junction monitoring.
Does the S32K396EHT1MJBST support CAN FD and what is its maximum bit rate?
Yes, the S32K396EHT1MJBST integrates three FlexCAN FD controllers supporting ISO 11898-1:2015 compliant operation up to 5 Mbps in FD mode and 1 Mbps in classical CAN. Each controller features programmable bit timing, hardware message filtering, and CRC protection - fully validated in the S32K396RM Rev. 3 Chapter 76. The S32K396EHT1MJBST requires external transceivers for physical layer implementation.
How is functional safety certification implemented in the S32K396EHT1MJBST?
The S32K396EHT1MJBST achieves ISO 26262 ASIL-D compliance through integrated hardware safety mechanisms: dual-core lockstep Cortex-M7 with comparator logic, FCCU for fault collection, ERM for error reporting, STCU2 for self-test orchestration, and dual-clock monitoring (CMU_FC/CMU_FM). These are documented in S32K396RM Chapters 44–52 and supported by NXP's certified safety manual and FMEDA reports - no external safety monitor is needed for ASIL-D decomposition.
What debugging interfaces does the S32K396EHT1MJBST provide?
The S32K396EHT1MJBST provides JTAG (via pins TCK/TMS/TDO/TDI) and SWD interfaces, both accessible through the Debug Subsystem (Chapter 84) and JTAG Controller (Chapter 85). It supports Nexus Class 3 trace, real-time variable watch, and secure debug authentication via HSE_B. Debug access can be permanently locked via DCF records stored in protected flash - preventing unauthorized firmware extraction during production.
Is the S32K396EHT1MJBST pin-compatible with other S32K39 series MCUs?
Yes, the S32K396EHT1MJBST shares identical 176-pin LQFP package and pinout with S32K394EHT1MJBST and S32K392EHT1MJBST per NXP's S32K39 family datasheet. Signal multiplexing and electrical characteristics are consistent across these variants, enabling hardware reuse across ASIL-D (S32K396), ASIL-B (S32K394), and cost-optimized (S32K392) designs - though flash size, core count, and safety features differ.
S32K396EHT1MJBST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- -
- Series:
- -
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
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- Core Processor:
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- Core Size:
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- Speed:
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- Program Memory Size:
- -
- Program Memory Type:
- -
- EEPROM Size:
- -
- RAM Size:
- -
- Voltage - Supply (Vcc/Vdd):
- -
- Data Converters:
- -
- Oscillator Type:
- -
- Operating Temperature:
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- Grade:
- -
- Qualification:
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- Mounting Type:
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- Supplier Device Package:
S32K396EHT1MJBST FAQ
1.How can I place an order for S32K396EHT1MJBST through Aetrix?
Please submit a Request for Quotation (RFQ) for S32K396EHT1MJBST 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 S32K396EHT1MJBST reliable?
The price and inventory of S32K396EHT1MJBST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S32K396EHT1MJBST is usually 5 days.
3.What payment methods are accepted for S32K396EHT1MJBST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S32K396EHT1MJBST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S32K396EHT1MJBST?
S32K396EHT1MJBST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S32K396EHT1MJBST 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 S32K396EHT1MJBST?
For technical support, including S32K396EHT1MJBST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S32K396EHT1MJBST requirements.
6.How does Aetrix verify that S32K396EHT1MJBST is sourced from the original manufacturer or authorized distributors?
All S32K396EHT1MJBST 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 S32K396EHT1MJBST meets industry standards.
7.What is the process for return or replacement of S32K396EHT1MJBST?
All S32K396EHT1MJBST units undergo pre-shipment inspection (PSI). If there is an issue with S32K396EHT1MJBST, 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 S32K396EHT1MJBST part is unused and in its original packaging.
Return procedure for S32K396EHT1MJBST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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