HYC9088AR-LF

Controllers Overview

The HYC9088AR-LF is a hybrid ARCNET transceiver module designed for twisted pair and coaxial cable networks. It operates at data rates up to 2.5 Mbps and supports star, bus, and daisy-chained topologies. The device interfaces directly with ARCNET LAN controllers using +5V (VCC) and -5V (VDD) power supplies, drawing typical currents of 190 mA and 180 mA respectively. It features a 20-pin Single In-Line Package (SIP) with a right-angle lead frame configuration. The unit includes built-in filters to reduce EMI and transformer coupling for electrical isolation.

Controllers Feature Summary

• Interfaces ARCNET LAN controllers to shielded or unshielded twisted pair and coaxial cables via an on-board transformer.
• Converts digital pulse information from the controller into analog dipulse signals for transmission and converts received signals back to TTL levels.
• Supports high impedance transmission to minimize loading on the network cable characteristic impedance.
• Includes enhanced built-in filters to eliminate out-of-band noise and undesirable frequencies during signal processing.

Controllers Applications

• Small ARCNET twisted pair networks utilizing daisy-chained or bus configurations.
• ARCNET coaxial cable networks consisting of eight nodes or fewer.
• Combining twisted pair segments with coaxial networks using two-port links.

Controllers Procurement Notes

Verify the specific ordering suffix 'R-LF' confirms the right-angle lead frame and RoHS compliance status. Confirm current manufacturing availability as this component may be subject to special order requirements or end-of-life status. Ensure the supplier provides valid traceability documentation for the Microchip Technology or SMSC origin.

Controllers Selection Notes

Select this component when designing ARCNET networks requiring compatibility with both twisted pair and coaxial media. Ensure the system architecture supports the required dual voltage rails of +5V and -5V. Verify that the network topology aligns with the supported star, bus, or daisy-chain configurations and that cable termination resistors match the specific characteristic impedance of the chosen medium.

Controllers Part Context

This part belongs to the HYC9088A series of High Impedance Transceivers (HIT). The 'R' designation indicates a right-angle lead frame package, while 'LF' denotes a lead-free, RoHS-compliant variant. The original manufacturer was Standard Microsystems Corporation (SMSC), which was subsequently acquired by Microchip Technology.

Controllers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. The HYC9088AS is noted as the straight lead frame alternative within the same family.