HI-4855PSIF

Overview

The HI-4855PSIF is a full-duplex RS-485/RS-422 transceiver manufactured by Holt Integrated Circuits. It features separate receiver and transmitter enable pins for precise control. The device is optimized for high-speed applications with data rates up to 20 Mbps. It operates within a supply voltage range of 3.15V to 3.45V and supports an industrial operating temperature range from -40°C to +85°C. The component is housed in a 20-SOIC package with an exposed pad, designed for surface-mount installation.

Feature Summary

• Full-duplex operation with independent receiver and transmitter enable controls
• Optimized for high-speed data transmission up to 20 Mbps
• Controlled slew rate to minimize electromagnetic interference (EMI)
• Designed for avionics and harsh environment reliability

Applications

• Flight control systems
• Engine management units
• Avionics data bus communication networks

Procurement Notes

Verify the specific ordering suffix PSIF to confirm the tape and reel packaging configuration. Ensure the procurement channel provides traceability documentation suitable for aerospace or military-grade components. Confirm that the active status aligns with long-term availability requirements for embedded system designs.

Selection Notes

Select this component when full-duplex communication is required alongside high-speed data integrity. The controlled slew rate makes it suitable for environments sensitive to EMI. Verify that the 20-SOIC footprint matches the PCB layout constraints and that the 3.3V nominal supply voltage is compatible with the system power architecture.

Part Context

Holt Integrated Circuits specializes in data bus solutions for the military and aerospace sectors. The HI-4855 series addresses the need for robust serial communication interfaces in flight control and navigation equipment. This part represents the company's focus on providing mixed-signal solutions tailored for demanding operational conditions.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.