Sun SP4710401-01 Ultra Wide Differential SCSI Controller Card UW SCSI

Sun SP4710401-01 Ultra Wide Differential SCSI Controller Card UW SCSI

The Sun SP4710401-01 is an Ultra Wide Differential SCSI controller card designed for Sun Microsystems workstations and servers equipped with SBus expansion slots. It provides High Voltage Differential (HVD) Ultra Wide SCSI connectivity, supporting the 16-bit wide SCSI bus at up to 40 MB/s transfer rates. The card connects external SCSI storage devices via a 68-pin HD68 connector on the bracket, clearly labeled "ULTRA SCSI DIFFERENTIAL" on the faceplate.

Specifications & What's Included

• Part Number: SP4710401-01 (Assembly: SP4710401-01 as printed on PCB)


• Type: Ultra Wide Differential (HVD) SCSI Controller Card


• Bus Interface: SBus


• SCSI Bus Width: 16-bit (Ultra Wide)


• SCSI Signaling: High Voltage Differential (HVD)


• External Connector: 68-pin HD68 SCSI on bracket


• Main Controller IC: Texas Instruments SN75976A2 (visible on PCB close-up)


• Additional ICs: Multiple logic and support chips visible on PCB


• Form Factor: SBus expansion card / module


• Included: Card only — no cables or accessories

Applications

Ultra Wide Differential SCSI controller cards like this one were used in Sun Microsystems workstations and servers — such as the SPARCstation and Ultra series — to connect high-performance external SCSI storage arrays, tape libraries, and disk enclosures. High Voltage Differential (HVD) SCSI was the preferred signaling standard in mission-critical server and workstation environments of the 1990s because it supported longer cable runs (up to 25 meters) and better noise immunity than single-ended SCSI, making it well suited for rack-based storage systems and data center deployments. This card is still sought after by administrators maintaining legacy Sun SBus-based systems that rely on HVD SCSI storage infrastructure, as well as collectors preserving Sun Microsystems hardware from that era.