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CA91C142D - Block Diagram


VME to PCI Bridge

The CA91C142D (Universe II) is the industry’s leading high-performance PCI to VME interconnect. It is fully compliant with the VME64 bus standard, and is tailored to support advanced PCI processors and peripherals. With a zero wait state implementation for write transactions, and the capability to support pre-fetch reads and multi-beat transactions, the Universe II provides high performance utilization of the PCI bus.

The Universe II eases development of VMEbus systems by providing direct connection to a local PCI bus. The device is ideally suited for CPU or peripheral boards functioning as both master and slave in the VMEbus system. Bridging is accomplished through a decoupled architecture with independent FIFOs for inbound (VME to PCI), outbound (PCI to VME), and DMA traffic. With this architecture, throughput is maximized without sacrificing bandwidth on either bus.

Designing with the Universe II eases the development of VME Single Board Computers (SBCs) and I/O peripherals targeting the military, aerospace, industrial automation and medical markets.


  • High performance 64-bit VME to PCI bus interconnect
  • Industry-proven, reliable PCI to VME bridge
  • Fully compliant, 32 or 64-bit, 33 MHz PCI bus interconnect
  • Integral FIFOs for write posting to maximize bandwidth utilization
  • Programmable DMA controller with Linked-List mode
  • Flexible interrupt logic
  • Automatic initialization for VME slave-only applications
  • Extensive suite of VMEbus address and data transfer modes
  • Register set programmable from both the PCI and VME64 buses
  • Full VMEbus system controller functionality
  • Sustained transfer rates of up to 60-70 Mbytes/s
  • Support for RMWs, ADOHPCI LOCK cycles, and semaphores
  • Location monitors for broadcasting interrupts and message passing
  • Commercial, industrial, and extended temperature variants
  • IEEE 1149.1 JTAG 

Product Specification

VME BusPCI BusTemp. RangePower Consumption Max (W)Pkg. CodePkg. Dimensions
VME6433MHz PCI (64-bit 5.0V)-55 to 125°C, -40 to 85°C, 0 to 70°C3.2BGG313, BG31335 x 35 x 2.3

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
CA91C142D-25EEActiveBG313PBGA313ENoTrayCheck Availability
CA91C142D-33CEActiveBG313PBGA313CNoTrayCheck Availability
CA91C142D-33CEVActiveBGG313PBGA313CYesTrayCheck Availability
CA91C142D-33IEActiveBG313PBGA313INoTrayCheck Availability
CA91C142D-33IEVActiveBGG313PBGA313IYesTrayCheck Availability


Technical Documentation

Title Type Format File Size Datesort icon
User Guides & Manuals
Universe IID/B User Manual Manual PDF 1.83 MB Jun 28, 2013
Apps Notes & White Papers
Tsi148/Universe II Differences Application Note Application Note PDF 77 KB Sep 26, 2014
Universe IID Debug and Initialization Notes Application Note PDF 84 KB Oct 15, 2009
PCN# : A1604-02 Ink Mark to Laser Mark Product Change Notice PDF 128 KB May 2, 2016
PCN# : A1412-02 Change of Mold Compound Material Product Change Notice PDF 23 KB Dec 22, 2014
Universe IID/B Device Differences Misc PDF 40 KB Oct 16, 2009
Universe IID-B Device Errata and Design Notes Device Errata PDF 64 KB Oct 15, 2009
Universe IID VME to PCI Bridge Product Brief PDF 81 KB Sep 1, 2009

Software & Tools

Title Type Format File Size Datesort icon
Universe IID BSDL File Model - BSDL ZIP 8 KB Mar 6, 2013
Universe II IBIS Model Model - IBIS N/A 37 KB Sep 3, 2014