MC33789 | Airbag Power Supply and PSI5 Sensor Interface | NXP Semiconductors

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Airbag Power Supply and PSI5 Sensor Interface

MC33789 Active

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The NXP® MC33789 is a mixed signal IC for airbag safety applications that provides a cost-effective and flexible system IC solution across the range of airbag partitions used in cars and other vehicles.

  • Connects to the 12 V vehicle battery and supplies the multiple voltages of a typical airbag system
  • Can detect switched input states and communicate with both local and remote crash sensors
  • Offers an industry standard interface (SPI) and four PSI5 leader interfaces
  • Diagnostic - self protection capability and a programmable analog interface accessible by the system MCU
  • The MC33789 is a SafeAssure® functional safety solution.

Block Diagram

Freescale MC33789 Network Transceivers Block Diagram

NXP<sup>&#174;</sup> MC33789 Network Transceivers Block DiagramV
Get diagram PDF

Features

  • Designed to operate 5.2 V ≤ VPWR ≤ 20 V, up to 40 V transients
  • Safing state machine with programmable sensing thresholds
  • Two configurable high side/low side drivers with PWM capability
  • Four PSI5 satellite sensor leader interfaces
  • Self-protected and diagnostic capability
  • System power mode control with watchdog and system Power On Reset (POR)
  • Supports complete airbag system power supply architecture, including system power mode control, supplies for squib firing (33 V), satellite sensors (6.3 V), and local ECU sensors and ECU logic circuits (5.0 V)
  • Nine configurable switch input monitors for simple switch and Hall-effect sensor interfaces
  • 16-bit SPI interface
  • LIN 2.1 physical layer interface

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N true 0 PSPMC33789en 5 Application Note Application Note t789 1 Data Sheet Data Sheet t520 1 Fact Sheet Fact Sheet t523 2 Reference Manual Reference Manual t877 1 en_US 3 1 9 English AIRBAGFS: Freescale is a leading semiconductor supplier for next-generation airbag applications with custom and standard microcontrollers (MCU), analog and sensor products. We offer solutions for point-to-point and bus-based satellite interface architectures with the established distributed system interface (DSI) as well as the emerging peripheral sensor interface (PSI5) architectures. 1208540600963727452987 PSP 366.7 KB None None documents None 1208540600963727452987 /docs/en/fact-sheet/AIRBAGFS.pdf 366678 /docs/en/fact-sheet/AIRBAGFS.pdf AIRBAGFS N N 2016-10-31 Automotive Airbag Safety Systems - Fact Sheet /docs/en/fact-sheet/AIRBAGFS.pdf /docs/en/fact-sheet/AIRBAGFS.pdf Fact Sheet N Y 736675474163315314 2025-02-24 pdf N en Sep 12, 2016 Fact Sheet t523 Fact Sheet Fact Sheet Y N Automotive Airbag Safety Systems - Fact Sheet 2 3.0 English The MC33789 is a mixed signal IC for airbag safety applications. 1273694656357722655608 PSP 118.8 KB None None documents None 1273694656357722655608 /docs/en/fact-sheet/MC33789FS.pdf 118792 /docs/en/fact-sheet/MC33789FS.pdf MC33789FS N 2010-05-12 MC33789FS, Airbag System Basis Chip (SBC) with Power Supply and PSI5 Sensor Interface /docs/en/fact-sheet/MC33789FS.pdf /docs/en/fact-sheet/MC33789FS.pdf Fact Sheet N Y 736675474163315314 2022-12-07 pdf en Apr 10, 2012 Fact Sheet t523 Fact Sheet Fact Sheet Y N MC33789FS, Airbag System Basis Chip (SBC) with Power Supply and PSI5 Sensor Interface 3 4.0 English The 33789, a SafeAssure<sup>&#174;</sup> SMARTMOS<sup>&#174;</sup> solution, is a mixed signal IC for airbag safety applications. 1300132200928713099582 PSP 6.6 MB None None documents None 1300132200928713099582 /docs/en/data-sheet/MC33789.pdf 6586778 /docs/en/data-sheet/MC33789.pdf MC33789 N N 2016-10-31 MC33789, Airbag System Basis Chip (SBC) with Power Supply and PSI5 Sensor Interface - Data Sheet /docs/en/data-sheet/MC33789.pdf /docs/en/data-sheet/MC33789.pdf Data Sheet N Y 980000996212993340 2022-12-07 pdf N en Sep 18, 2014 Data Sheet t520 Data Sheet Data Sheet Y N MC33789, Airbag System Basis Chip (SBC) with Power Supply and PSI5 Sensor Interface - Data Sheet false en_US en Reference Manual Reference Manual 1 4 3.0 English The NXP Airbag Reference Demonstrator (ARD) is an application demonstrator system which provides an airbag ECU implementation example using NXP standard products and firmware. 1282063920560707766564 PSP 3.9 MB None None documents None 1282063920560707766564 /docs/en/reference-manual/ARDRM.pdf 3924733 /docs/en/reference-manual/ARDRM.pdf ARDRM documents N N 2016-10-31 ARDRM, Airbag Reference Demonstrator Reference Manual /docs/en/reference-manual/ARDRM.pdf /docs/en/reference-manual/ARDRM.pdf Reference Manual N 500633505221135046 2024-01-19 pdf N en Apr 2, 2012 500633505221135046 Reference Manual Y N ARDRM, Airbag Reference Demonstrator Reference Manual Application Note Application Note 1 5 2.0 Chinese 1319753989104702481752zh PSP 7.6 MB Registration without Disclaimer None documents Extended 1319753989104702481752 /secured/assets/documents/zh/application-note/AN4388.pdf 7584935 /secured/assets/documents/zh/application-note/AN4388.pdf AN4388 documents Y N 2016-10-31 AN4388: Quad Flat Package (QFP) – Application Note /secured/assets/documents/zh/application-note/AN4388.pdf https://www.nxp.com.cn/webapp/Download?colCode=AN4388&docLang=zh Application Note N 645036621402383989 2024-01-19 zh May 10, 2022 645036621402383989 Application Note Y N AN4388，四方扁平封装(QFP) - 应用说明 3 English Providing guidelines for the handling and board mounting of NXP's QFP packages. Including recommendations for the design of Printed Circuit Boards (PCB), board mounting, and rework. Also providing generic information of package properties: Moisture Sensitivity Level (MSL) rating, board level reliability, mechanical and thermal resistance data. Because semiconductor components are electrically and mechanically sensitive devices, proper precautions for handling, packing and processing QFP packages are described. 1319753989104702481752 PSP 7.6 MB Registration without Disclaimer None documents Extended 1319753989104702481752 /secured/assets/documents/en/application-note/AN4388.pdf 7584935 /secured/assets/documents/en/application-note/AN4388.pdf AN4388 documents Y N 2016-10-31 AN4388: Quad Flat Package (QFP) – Application Note /webapp/Download?colCode=AN4388 /secured/assets/documents/en/application-note/AN4388.pdf Application Note N 645036621402383989 2024-01-19 pdf Y en Aug 31, 2019 645036621402383989 Application Note Y N AN4388: Quad Flat Package (QFP) – Application Note false 0 MC33789 downloads en true 1 Y PSP Y Y Application Note 1 /secured/assets/documents/en/application-note/AN4388.pdf 2016-10-31 1319753989104702481752 PSP 5 Aug 31, 2019 Application Note Providing guidelines for the handling and board mounting of NXP's QFP packages. Including recommendations for the design of Printed Circuit Boards (PCB), board mounting, and rework. Also providing generic information of package properties: Moisture Sensitivity Level (MSL) rating, board level reliability, mechanical and thermal resistance data. Because semiconductor components are electrically and mechanically sensitive devices, proper precautions for handling, packing and processing QFP packages are described. Registration without Disclaimer /secured/assets/documents/en/application-note/AN4388.pdf English documents 7584935 None 645036621402383989 2024-01-19 Y /webapp/Download?colCode=AN4388 AN4388: Quad Flat Package (QFP) – Application Note /secured/assets/documents/en/application-note/AN4388.pdf documents 645036621402383989 Application Note N en Extended Y pdf 3 Y N AN4388: Quad Flat Package (QFP) – Application Note 7.6 MB AN4388 N 1319753989104702481752 Data Sheet 1 /docs/en/data-sheet/MC33789.pdf 2016-10-31 1300132200928713099582 PSP 3 Sep 18, 2014 Data Sheet Data Sheet The 33789, a SafeAssure<sup>&#174;</sup> SMARTMOS<sup>&#174;</sup> solution, is a mixed signal IC for airbag safety applications. None /docs/en/data-sheet/MC33789.pdf English 6586778 None Data Sheet 2022-12-07 N /docs/en/data-sheet/MC33789.pdf MC33789, Airbag System Basis Chip (SBC) with Power Supply and PSI5 Sensor Interface - Data Sheet /docs/en/data-sheet/MC33789.pdf documents 980000996212993340 Data Sheet N Y en None Y t520 pdf 4.0 N N MC33789, Airbag System Basis Chip (SBC) with Power Supply and PSI5 Sensor Interface - Data Sheet 6.6 MB MC33789 N 1300132200928713099582 Fact Sheet 2 /docs/en/fact-sheet/AIRBAGFS.pdf 2016-10-31 1208540600963727452987 PSP 1 Sep 12, 2016 Fact Sheet Fact Sheet AIRBAGFS: Freescale is a leading semiconductor supplier for next-generation airbag applications with custom and standard microcontrollers (MCU), analog and sensor products. We offer solutions for point-to-point and bus-based satellite interface architectures with the established distributed system interface (DSI) as well as the emerging peripheral sensor interface (PSI5) architectures. None /docs/en/fact-sheet/AIRBAGFS.pdf English 366678 None Fact Sheet 2025-02-24 N /docs/en/fact-sheet/AIRBAGFS.pdf Automotive Airbag Safety Systems - Fact Sheet /docs/en/fact-sheet/AIRBAGFS.pdf documents 736675474163315314 Fact Sheet N Y en None Y t523 pdf 9 N N Automotive Airbag Safety Systems - Fact Sheet 366.7 KB AIRBAGFS N 1208540600963727452987 /docs/en/fact-sheet/MC33789FS.pdf 2010-05-12 1273694656357722655608 PSP 2 Apr 10, 2012 Fact Sheet Fact Sheet The MC33789 is a mixed signal IC for airbag safety applications. None /docs/en/fact-sheet/MC33789FS.pdf English 118792 None Fact Sheet 2022-12-07 /docs/en/fact-sheet/MC33789FS.pdf MC33789FS, Airbag System Basis Chip (SBC) with Power Supply and PSI5 Sensor Interface /docs/en/fact-sheet/MC33789FS.pdf documents 736675474163315314 Fact Sheet N Y en None Y t523 pdf 3.0 N MC33789FS, Airbag System Basis Chip (SBC) with Power Supply and PSI5 Sensor Interface 118.8 KB MC33789FS N 1273694656357722655608 Reference Manual 1 /docs/en/reference-manual/ARDRM.pdf 2016-10-31 1282063920560707766564 PSP 4 Apr 2, 2012 Reference Manual The NXP Airbag Reference Demonstrator (ARD) is an application demonstrator system which provides an airbag ECU implementation example using NXP standard products and firmware. None /docs/en/reference-manual/ARDRM.pdf English documents 3924733 None 500633505221135046 2024-01-19 N /docs/en/reference-manual/ARDRM.pdf ARDRM, Airbag Reference Demonstrator Reference Manual /docs/en/reference-manual/ARDRM.pdf documents 500633505221135046 Reference Manual N en None Y pdf 3.0 N N ARDRM, Airbag Reference Demonstrator Reference Manual 3.9 MB ARDRM N 1282063920560707766564 true Y Products

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