The Adaptec® AHA-8945 host adapter links both high-performance SCSI peripherals and 1394-enabled consumer electronics products to your computer using only one PCI slot. The AHA-8945 SCSI interface can chain a maximum 15 SCSI devices at speeds up to 40MB/sec, and its 1394 interface links a maximum 63 devices at speeds up to 200Mbps (25 MB/sec).
Small Image of AHA-8945
DownloadsDocumentationTechnical Specifications

Note: Only drivers that are not included or embedded within a supported operating system are listed below. To see a complete list of supported operating systems see the Product Specifications

Select your operating system or software below

Macintosh OS

Macintosh OS 8x and 9x


Microsoft Windows 95
Microsoft Windows 98
Microsoft Windows NT

Hardware Installation
how to install your adaptec pci card (html 74 kb)
Product Documentation
Ultra HotConnect 8945 (PDF 93 KB)
FireCard Ultra AHA-8945 (PDF 101 KB)
1394 FireWire (PDF 137 KB)
Number of devices
Up to 63 computer and consumer electronics devices

Bus System Interface Type

PCI (2.1 compliant)
External Connectors
2 X 6-pin 1394 connectors
Internal Connectors
1 x 6-pin 1394 connector1 x 4-pin power input connector (floppy disk style)
Data Transfer Rate
200 Mbps (25 MB/sec)


PCI Link Chip (400 Mbps Adaptec AITM-5800)
3-Port PHY (200 Mbps IBM 21S750PFC)

1394 Features

Isochronous and asynchronous data transfer
Function Control Protocol (FCP)
Supplies 15 watts of power to 1394 bus
Connection Management Protocol (CMP)
Hot plugging

Advanced SCSI Features

16-bit Wide Ultra SCSI
Multithreaded I/O (up to 255 tasks simultaneously)
Tagged command queuing
Synchronous and asynchronous data transfer
Automatic active termination, programmable via SCSISelect