HI-1575PQI

Overview

The HI-1575PQI is a low-power CMOS dual transceiver with integrated Manchester II encoder and decoder, designed to meet MIL-STD-1553 specifications. It operates on a single 3.3V supply and functions as a smart transceiver, enabling direct transmission and reception of properly encoded Command and Data words between a 16-bit host processor and dual MIL-STD-1553 data buses. The device handles encoding, Sync/Parity bit addition, and bus transmission via single write cycles. It features a small footprint in a 32-pin plastic TQFP package, with maximum power dissipation under 0.5W.

Feature Summary

• Integrated Manchester II Encoder and Dual Decoder for protocol handling
• Direct interface capability with 16-bit host processors
• Supports dual MIL-STD-1553 data bus connections

Applications

• MIL-STD-1553B remote terminal implementations
• Bus controller interfaces requiring integrated encoding
• Avionics systems with strict power and size constraints

Procurement Notes

Verify the specific suffix PQI against manufacturer documentation to confirm pinout and package dimensions. Ensure compliance with MIL-STD-1553A & B requirements for your application. Check for military processing options if required by your system specifications. Confirm RoHS status and lead finish details from the official datasheet before ordering.

Selection Notes

Select this component when a combined transceiver and protocol encoder/decoder is needed to reduce board space and design complexity. It is suitable for applications requiring 3.3V operation and low power consumption under 0.5W. Consider the 32-pin TQFP package for surface-mount assembly needs. Evaluate if the integrated functionality meets the bandwidth and timing requirements of the target MIL-STD-1553 network.

Part Context

Holt Integrated Circuits specializes in data bus communication ICs for military, aerospace, and industrial markets. The HI-1575 series addresses the need for compact, low-power solutions in embedded avionics and flight control systems. This part integrates physical layer and protocol functions, simplifying the design of MIL-STD-1553 terminals compared to discrete component approaches.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Verify compatibility with existing MIL-STD-1553 controllers before considering alternative vendors.