HI-6131PQTF

Specialized Overview

The HI-6131PQTF is a 3.3V CMOS MIL-STD-1553 / MIL-STD-1760 multi-terminal device providing a complete interface between a host processor and the MIL-STD-1553B bus. It integrates one Bus Controller (BC), one Bus Monitor Terminal (MT), and two independent Remote Terminals (RTs). The device communicates with the host via a 4-wire serial peripheral interface (SPI) and utilizes a shared on-chip dual bus transceiver. It features 64K bytes of on-chip static RAM, which can be allocated among the terminal functions. Programmable interrupts provide status to the host, and the device supports autonomous operation with minimal host intervention.

Specialized Feature Summary

• Concurrent multi-terminal operation supporting combinations of BC, MT, and two RTs
• Integrated 64K byte static RAM with optional error detection and correction
• Support for Simple Monitor Terminal (SMT) and IRIG-106 Monitor Terminal (IMT) modes
• Built-in self-test capabilities for protocol logic, digital signal paths, and internal RAM

Specialized Applications

• Avionics data bus interfaces in commercial aircraft
• Military helicopter programs requiring MIL-STD-1553 compliance
• Remote terminal testing systems certified to MIL-STD-1553 standards

Specialized Procurement Notes

Verify the specific package variant, as the HI-6131 is available in both 64-pin QFN and 64-pin PQFP configurations. Confirm temperature grade requirements, noting that extended range options may require specific ordering suffixes or burn-in processes. Ensure the host system provides a compatible 4-wire SPI interface for register access and memory allocation.

Specialized Selection Notes

Select the HI-6131 when a 4-wire SPI host interface is required instead of a parallel bus. Choose this part over the HI-6130 if board space is limited by the smaller 64-pin package options. Consider the HI-6132 only if both parallel and SPI interfaces are needed simultaneously in a hermetically sealed ceramic package. Verify RAM allocation needs against the 64K byte limit for concurrent terminal operations.

Specialized Part Context

The HI-6131 belongs to the HI-613x family of multi-terminal devices from Holt Integrated Circuits. This family includes the HI-6130 with a 16-bit parallel interface and the HI-6132 combining both parallel and SPI interfaces. These devices are designed for high-reliability avionics applications, offering integrated bus controller, monitor, and remote terminal functions on a single chip.

Specialized Replacement Considerations

Public confirmed substitute part numbers: HI-6130PQTF (parallel interface variant), HI-6132 (combined interface variant).