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NXP Semiconductors MC33665ATS4AE
- Part No.:
- MC33665ATS4AE
- Manufacturer:
- NXP Semiconductors
- Category:
- Battery Management
- Package:
- 48-LQFP Exposed Pad
- Datasheet:
-
MC33665ATS4AE.pdf
- Description:
- IC BMS TPL TXRX CAN GATEWAY
- Quantity:
- Payment:
- Shipping:
Inventory:104
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Product details
Overview
MC33665ATS4AE from NXP Semiconductors is a SPI-based battery management communication gateway IC that bridges microcontrollers to isolated TPL daisy chains in automotive BMS architectures. It provides four independent TPL ports, supports 2 Mbit/s per port, operates from −40 °C to +125 °C, and delivers ASIL D–capable functionality for safety-critical EV battery monitoring systems.
For engineers reviewing the MC33665ATS4AE datasheet, MC33665ATS4AE pinout, MC33665ATS4AE application, or MC33665ATS4AE equivalent, this page delivers verified technical context, validated pin functions, real-world BMS integration use cases, and confirmed alternative options aligned with AEC-Q100 Grade 1 requirements.
Technical Context
The MC33665ATS4AE implements a dedicated message routing unit that forwards SPI-hosted commands to up to 62 nodes across four TPL daisy chains using automatic address-based routing. Its dual SPI interface (master/slave) supports configurable request/response buffers and full-duplex operation at up to 10 Mbit/s.
It integrates a clock generation subsystem with internal RC oscillator and external crystal support, power mode management (25 μA sleep current), and GPIOs assignable to status/event signaling. All TPL ports support both capacitive and inductive isolation and are compatible with MC33771C, MC33772C, and MC33775A cell controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| SPI Interface | Configurable master/slave mode; enables direct MCU connection without protocol translation logic |
| TPL Ports | Four independent daisy chain interfaces; each supports up to 62 nodes for scalable BMS topologies |
| Data Rate (TPL) | 2 Mbit/s per port; ensures low-latency cell voltage/temperature reporting in large battery packs |
| Operating Temp | −40 °C to +125 °C ambient; meets AEC-Q100 Grade 1 for under-hood automotive deployment |
| Sleep Current | 25 μA typical; minimizes quiescent drain during vehicle standby states |
| Isolation Support | Capacitive and inductive TPL bus compatibility; enables flexible BMS board-level isolation design |
| ASIL Level | Designed for ASIL D applications; provides fault detection, error reporting, and message synchronization |
Pinout & Package
LQFP48 package (SOT1571-1), 7 × 7 × 1.4 mm body, 0.50 mm pitch - suitable for automated SMT assembly in automotive control modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO | IO supply voltage | Configurable 3.3 V or 5 V rail for digital interface level matching with host MCU |
| SCLK_REQ / SCLK_RSP | SPI clock inputs/outputs | Separate request and response clock lines enable full-duplex SPI timing control |
| SDAT_REQ_RXD / SDAT_RSP_TXD | SPI data I/O | Dual-data-path architecture isolates host command flow from BMS response flow |
| CSN_REQ / CSN_RSP | SPI chip select | Independent chip selects allow concurrent access to request and response queues |
| RXTX0P–RXTX3P / RXTX0N–RXTX3N | TPL differential bus pairs | Four fully isolated differential TPL channels; each pair drives one daisy chain segment |
| GPIO0–GPIO7 | Configurable general-purpose I/O | Assignable as status outputs, interrupt inputs, or SYNC event triggers for cross-port timing alignment |
| WAKE_IN | External wake-up input | Enables low-power BMS monitoring by waking device on TPL activity or MCU signal |
| RESET | Active-low reset input | Hardware reset path independent of SPI/CAN/UART; ensures deterministic initialization |
Key Features
| Feature | Design Value |
|---|---|
| Multi-protocol host interface | SPI-only variant (MC33665ATS4AE) eliminates CAN transceiver cost while retaining full BMS gateway functionality |
| Automatic TPL message routing | Address-based forwarding removes need for host-side routing logic; reduces MCU firmware complexity |
| Message synchronization | SYNC-triggered transmission across all four TPL ports enables time-aligned cell measurements |
| I²C master interface | Controls external EEPROMs or security ICs for configuration storage and cryptographic key management |
| Integrated power management | On-chip 5 V regulator option and external CAN transceiver power control reduce external component count |
| AEC-Q100 Grade 1 qualification | Validated for automotive environments; supports functional safety development up to ASIL D |
Applications
| EV Battery Pack Monitoring | Hybrid Powertrain BMS |
|---|---|
Use Scenario: Real-time voltage, temperature, and state-of-charge collection from 100+ series-connected cells in a traction battery pack. IC Role / Device Role / Timing Role: SPI-to-TPL gateway that aggregates data from MC33775A cell controllers across four daisy chains and relays it to the main BMS controller. Use Value: Enables synchronized sampling across all chains via programmable delay, reducing measurement skew to <100 ns for accurate SoC estimation. |
Use Scenario: Coordinating charge/discharge control between high-voltage traction battery and 48 V mild-hybrid auxiliary battery. IC Role / Device Role / Timing Role: Dual-role gateway: routes commands from main MCU to both battery domains and synchronizes safety-critical fault reporting. Use Value: Eliminates separate gateways per battery domain; single MC33665ATS4AE reduces PCB area by 35% and BOM cost by $2.10. |
| Commercial Vehicle Energy Management | Energy Storage System (ESS) Rack Control |
Use Scenario: Managing distributed battery modules in Class 8 truck auxiliary power units with extended thermal operating range. IC Role / Device Role / Timing Role: Robust SPI gateway interfacing to MC33772C controllers across vibration-prone chassis-mounted modules. Use Value: AEC-Q100 qualification ensures reliable operation at 125 °C ambient; sleep mode extends module uptime during depot idle periods. |
Use Scenario: Centralized monitoring of 20+ rack-level lithium-ion battery cabinets in grid-scale ESS installations. IC Role / Device Role / Timing Role: High-reliability TPL hub connecting rack controllers to SCADA system via industrial SPI interface. Use Value: Four-port architecture supports 248-node scalability (4 × 62); loopback support simplifies field diagnostics without rack disassembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery management communication gateway applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC33665ATU4AE | UART host interface instead of SPI; same TPL port count, timing, and isolation support | Used where MCU lacks SPI peripheral but offers UART with auto-baud detection (e.g., legacy 8-bit microcontrollers) | Select when host MCU UART resources are available and SPI is constrained; identical pinout and TPL performance |
| MC33665ATF4AE | CAN FD host interface (1 Mbit/s CAN, 5 Mbit/s FD); includes integrated CAN transceiver power control | Required for CAN-based BMS architectures needing standardized network layer interoperability (e.g., ISO 11898-1) | Choose when system-level CAN bus integration is mandatory; adds external CAN transceiver but retains same TPL capabilities |
Compared with MC33665ATU4AE and MC33665ATF4AE, the MC33665ATS4AE provides optimal SPI-native integration for new automotive BMS designs-reducing external components, eliminating baud rate negotiation overhead, and delivering deterministic latency critical for ASIL D timing validation.
Availability
MC33665ATS4AE is available at Aetrix Electronics and suitable for EV battery pack monitoring, hybrid powertrain BMS, and commercial vehicle energy management requiring stable component supply across multi-year automotive production cycles.
Supply support for MC33665ATS4AE 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 company specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with core expertise in functional safety and embedded processing.
The MC33665A product line delivers automotive-grade battery communication gateways designed specifically for ASIL D–compliant BMS architectures, enabling scalable, isolated daisy-chain topologies across electric and hybrid vehicles.
FAQ
What communication protocols does the MC33665ATS4AE support?
The MC33665ATS4AE supports only SPI as its host interface-specifically configured in single or dual SPI mode with up to 10 Mbit/s data rate. It does not support CAN FD or UART; those variants are designated as MC33665ATF4AE and MC33665ATU4AE respectively. The MC33665ATS4AE uses SPI to communicate with the host MCU while managing four TPL daisy chains independently.
How many TPL nodes can the MC33665ATS4AE manage in total?
The MC33665ATS4AE supports up to four TPL daisy chains, with each chain accommodating up to 62 nodes. This yields a maximum theoretical node count of 248 devices-such as MC33771C, MC33772C, or MC33775A battery cell controllers-enabling highly scalable BMS architectures for large-format EV battery packs.
Does the MC33665ATS4AE include an integrated voltage regulator?
Yes, the MC33665ATS4AE includes an integrated 5 V regulator controllable via the REG_EN pin, allowing direct supply from a 12 V source. It also supports external 5 V regulation. This dual-supply flexibility simplifies power architecture design and eliminates the need for an external 5 V LDO in many automotive BMS implementations.
What is the operating temperature range for the MC33665ATS4AE?
The MC33665ATS4AE is qualified to AEC-Q100 Grade 1, with a specified ambient operating temperature range of −40 °C to +125 °C. This rating validates its suitability for under-hood and battery-pack-integrated placement in automotive applications where thermal extremes are common.
Is the MC33665ATS4AE pin-compatible with other variants in the MC33665A family?
Yes, the MC33665ATS4AE shares the same LQFP48 package (SOT1571-1) and pinout with MC33665ATU4AE and MC33665ATF4AE. All three variants are mechanically and electrically pin-compatible, allowing hardware design reuse across SPI, UART, and CAN FD host interface requirements without PCB changes.
MC33665ATS4AE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 48-LQFP Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Function:
- Power Management
- Battery Chemistry:
- -
- Number of Cells:
- 1
- Fault Protection:
- -
- Interface:
- I2C, SPI
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-HLQFP (7x7)
MC33665ATS4AE FAQ
1.How can I place an order for MC33665ATS4AE through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33665ATS4AE 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 MC33665ATS4AE reliable?
The price and inventory of MC33665ATS4AE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33665ATS4AE is usually 5 days.
3.What payment methods are accepted for MC33665ATS4AE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33665ATS4AE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33665ATS4AE?
MC33665ATS4AE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33665ATS4AE 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 MC33665ATS4AE?
For technical support, including MC33665ATS4AE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33665ATS4AE requirements.
6.How does Aetrix verify that MC33665ATS4AE is sourced from the original manufacturer or authorized distributors?
All MC33665ATS4AE 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 MC33665ATS4AE meets industry standards.
7.What is the process for return or replacement of MC33665ATS4AE?
All MC33665ATS4AE units undergo pre-shipment inspection (PSI). If there is an issue with MC33665ATS4AE, 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 MC33665ATS4AE part is unused and in its original packaging.
Return procedure for MC33665ATS4AE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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