The Technobox 3145 Ultra2 Fast and Wide SCSI Adapter is a PCI Mezzanine Card that bridges a 32-bit PCI host bus to Ultra2 SCSI devices. Built around the Symbios 53C895A controller, it delivers 40 MB/s in Single-Ended mode and 80 MB/s in Low-Voltage Differential mode, supporting both signaling schemes for flexible deployment across SCSI-2, SCSI-1, and SCSI-3 environments.
Technical Specifications
• Host Interface: 32-bit PCI (5V or 3.3V signaling environment)
• SCSI Standard: Ultra2 Fast and Wide
• Data Transfer Rates:
– Single-Ended (SE) Fast/Wide: 40 MB/s
– Low-Voltage Differential (LVD) Fast/Wide: 80 MB/s
• Controller: Symbios 53C895A
• SCSI Connectors:
– 68-pin front panel (ANSI X3.131)
– 64-pin rear user I/O on PMC for VMEbus P2 connectivity
• Memory: Optional 128 KB Bootstrap FLASH with Intel BIOS pre-installed
– Key Features
• Onboard active termination with DIP switch control
• Independent upper and lower SCSI bus byte termination selection
• Self-resetting fuse protecting against SCSI bus short circuits
• Status LEDs for SCSI bus activity monitoring
• Termination power (TERMPWR) provision
– Typical Applications
• Intel platform PCI-based SCSI host adapters
• VMEbus processor systems requiring SCSI connectivity
• Legacy SCSI device integration in modern embedded systems
– Compatibility & Integration
The adapter operates with SCSI-2 devices and is compatible with SCSI-1 and SCSI-3 peripherals. It supports both Single-Ended and Low-Voltage Differential signaling, enabling mixed-mode SCSI environments. BIOS code ships pre-installed for Intel platforms; VMEbus hosts interface via rear 64-pin I/O connectivity.
