The ACE family of MIL-STD-1553 terminals gets smaller

DDC's Advanced Communications Engine (ACE) family of integrated MIL-STD-1553 terminals, featuring an advanced dual-redundant Remote Terminal (RT), Bus Controller (BC), and Bus Monitor (MT) functions, has been improved. This paper reviews the available features and technology used to achieve the cost enhancements and size reduction required to meet late 1990's requirements. The mini-ACE is the functional equivalent to DDC's well-established ACE product family, but in a package that is half the size. At one square inch, the mini-ACE is the smallest production RT/BC/MT terminal available. ILC DATA DEVICE CORPORATION (DDC) was able to accomplish this size reduction by utilizing state-of-the-art monolithic fabrication technology with a custom-designed ceramic co-fired package. The resultant multi-chip module (MCM) design supports both plug-in and surface mount applications. This paper discusses the processes and the technology used to develop the mini-ACE MCM. It also provides an overview of the packaging technology trade-offs considered before designing the custom co-fired package. A discussion about the custom, monolithic 5-volt transceivers and special programming pads, that help to support the smallest, functional ACE, is included. A review of the features and specifications offered to support Bus Interface and the host processor interface is also presented.