Z53C8003VSC

Overview

The Z53C8003VSC is a CMOS SCSI interface integrated circuit manufactured by Zilog, belonging to the Z53C80 series. It operates as a PCI SCSI controller with a maximum data transfer rate of 3 MB/sec. The device functions within a supply voltage range of 4.75 V to 5.25 V and draws a typical operating current of 15 mA. Designed for commercial applications, it supports an operating temperature range from 0°C to +70°C. The component is housed in a 44-PLCC (Plastic Leaded Chip Carrier) package suitable for surface mount installation. It features eight termination terminals and carries a Moisture Sensitivity Level (MSL) rating of 3, corresponding to a 168-hour limit at peak reflow temperatures.

Feature Summary

• Provides dedicated SCSI interface functionality for system connectivity
• Integrates signal termination capabilities directly into the controller
• Supports standard CMOS logic levels for broad compatibility

Applications

• PCI-based SCSI controller implementations
• Computer peripheral interface circuits
• Data storage system connectivity modules

Procurement Notes

This component has reached End-of-Life status, with official discontinuation notices recorded in late 2023. Availability is restricted to existing stock or third-party surplus markets. Verification of authenticity is critical due to the high risk of counterfeit devices in the secondary market for obsolete components. Buyers must confirm the specific manufacturing date code and physical condition before acquisition, as original manufacturer support is no longer active.

Selection Notes

Designers should evaluate the 3 MB/sec transfer rate against modern bandwidth requirements, as this specification may be insufficient for high-performance storage applications. The 44-PLCC package requires specific PCB footprint considerations compared to smaller surface-mount options. Ensure that the host system provides the necessary 5V power rail and that the thermal environment remains within the specified 0°C to +70°C commercial range during operation.

Part Context

The Z53C8003VSC is part of the Z53C80 family of SCSI interface controllers produced by Zilog. This series was designed to facilitate SCSI connectivity in personal computers and embedded systems during the era of parallel SCSI standards. The 'VSG' suffix typically denotes the commercial temperature grade and plastic leaded chip carrier packaging variant within the broader product line.

Replacement Considerations

As a discontinued legacy component, direct pin-to-pin replacements are not readily available from major manufacturers. Modern designs often utilize USB or SATA interfaces instead of parallel SCSI. If a functional equivalent is strictly required for repair purposes, sourcing from specialized obsolete component distributors is necessary, though cross-referencing with other Zilog SCSI controllers may require extensive electrical verification.