HI-4851PSIF

Overview

The HI-4851PSIF is a half-duplex transceiver manufactured by Holt Integrated Circuits Inc. designed for RS-485 and RS-422 communication applications. It operates within a supply voltage range of 3.0V to 5.5V and supports data rates up to 10 Mbps. The device features a 3-state differential output driver and a high-impedance differential receiver, ensuring bus idle states when disabled. It is housed in a 16-SOIC (0.295", 7.50mm Width) package with an exposed pad, suitable for surface mount installation across an industrial temperature range of -40°C to 85°C.

Feature Summary

• Supports RS-485 and RS-422 standard communication protocols
• Integrated thermal shutdown protection for enhanced reliability
• High input impedance receiver design minimizes bus loading

Applications

• Industrial automation control systems
• Building automation networks
• Data acquisition equipment

Procurement Notes

Verify the specific suffix 'PSIF' against the manufacturer's official datasheet to confirm pinout compatibility and RoHS compliance status. Ensure the procurement channel provides original packaging with traceable lot codes to prevent counterfeit components. Cross-reference the part number with current production lifecycle status to confirm availability for long-term manufacturing needs.

Selection Notes

Select this component for designs requiring robust RS-485/RS-422 connectivity in noisy industrial environments. The exposed pad facilitates effective thermal dissipation during high-speed operation. Verify that the system power supply remains stable within the 3.0V to 5.5V range to maintain signal integrity and proper logic threshold levels.

Part Context

Holt Integrated Circuits specializes in data bus communication ICs for military, aerospace, and industrial markets. The HI-4851PSIF belongs to their interface product line, complementing other transceivers like the HI-4853 series. These components support embedded applications ranging from flight control to engine management systems.

Replacement Considerations

Check for direct substitutes such as the HI-4853PSIF or HI-4854PSIF from the same manufacturer. Evaluate cross-brand alternatives only if they match the 16-SOIC package dimensions and electrical specifications exactly.