HI-15530CDM

The HI-15530CDM from Holt Integrated Circuits is a monolithic Manchester encoder-decoder designed to provide a complete dual-redundant MIL-STD-1553 data bus interface. It integrates independent encoder and decoder channels with internal word buffers, enabling bidirectional data exchange between a host processor and a 1553 bus transceiver. Key characteristics include on-chip clock recovery from the Manchester-encoded serial data stream, automatic sync pattern detection, and programmable word length or frame formatting. The device operates at the standard 1 Mbps data rate and supports both remote terminal and bus controller applications. Its ceramic dual-inline package (CDIP) ensures robust thermal and mechanical performance in harsh environments, with a wide operating temperature range typical of military-grade semiconductors.

This encoder-decoder is deployed in mission-critical systems where deterministic, noise-immune serial communication is essential. Typical applications include flight control computers, engine monitoring units, and weapons management systems in military fixed-wing and rotary-wing aircraft. It is also used in spacecraft bus interfaces, missile guidance electronics, and ground support equipment that must conform to MIL-STD-1553 protocols. For procurement, the CDIP package and Holt’s heritage in high-reliability ICs make this part suitable for programs requiring long-term availability and traceability. Engineers should assess obsolescence risk on legacy designs, as mature MIL-STD-1553 components may have extended lead times or require last-time-buy planning. The device may be offered with screening options such as Class B or /883-level processing; verifying the exact suffix and sourcing from authorized channels ensures conformance to the required quality level.