Adaptec AHA-2740A EISA Fast SCSI Host Adapter Card AIC-7770 577000-01

Adaptec AHA-2740A EISA Fast SCSI Host Adapter Card AIC-7770 577000-01

The Adaptec AHA-2740A is an EISA-bus Fast SCSI-2 host adapter card built around the Adaptec AIC-7770 controller chipset. It connects EISA-slot workstations and servers to Fast SCSI (SCSI-2) devices — including hard drives, tape drives, optical drives, and scanners — delivering the higher throughput of Fast SCSI over the wide 32-bit EISA bus. The date code on the chip label (9727) places this card's manufacture in mid-1997, squarely in the era of high-end EISA workstations and servers from vendors such as Compaq, HP, and AST.

Specifications & What's Included

• Model: Adaptec AHA-2740A
• Part Number: 577000-01 (revision F, per chip label)
• Controller Chipset: Adaptec AIC-7770
• Bus Interface: EISA (32-bit)
• SCSI Standard: Fast SCSI (SCSI-2), single-ended
• External Connector: 50-pin Centronics (SCSI-2) on bracket
• Internal Connector: 50-pin IDC ribbon header on PCB
• Form Factor: Full-length EISA expansion card with standard bracket
• Date Code: 9727 (week 27, 1997)
• Includes: Card only — no SCSI cables or accessories AHA-2740A was designed for EISA-bus workstations and servers that required faster SCSI-2 performance than the older SCSI-1 standard could deliver. EISA (Extended Industry Standard Architecture) was a 32-bit expansion bus introduced in the late 1980s as an open alternative to IBM's MCA bus, and it was widely adopted in high-performance PCs, workstations, and servers from Compaq, HP (Hewlett-Packard), AST, and others through the mid-1990s. In these systems, a host adapter like the AHA-2740A served as the bridge between the system's EISA bus and the SCSI storage subsystem — managing data transfers to and from hard drives, tape backup units, CD-ROM drives, and other SCSI peripherals. The Fast SCSI-2 standard supported transfer rates up to 10 MB/s, a meaningful improvement over the 5 MB/s of SCSI-1. Today, the AHA-2740A remains relevant for technicians maintaining, restoring, or expanding legacy EISA-based systems, as well as collectors of late-1980s through mid-1990s workstation-class hardware. Compatible systems include EISA-slot machines running DOS, Windows NT, NetWare, SCO Unix, and other operating systems of that era.
  Condition: Used
  This Adaptec AHA-2740A EISA Fast SCSI Host Adapter Card has been inspected and appears to be in good condition. It was pulled from a working environment where it was previously in use and functional. The card shows normal light wear consistent with prior installation. The external Centronics SCSI connector and bracket are intact, and the PCB shows no visible damage or missing components. Please view our photo set and contact us if you have any questions. Please note: We have multiple units in stock — yours may not be the one shown in the photos, however, it will be similar in condition and function. Visit Our Store

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