Avago Technologies LSI53C180 - Manual (Page 35)

LSI53C180 Ultra3 SCSI Bus Expander 3-1
Chapter 3
Specifications
This chapter provides the pin descriptions associated with the
LSI53C180 as well as electrical characteristics. It includes these topics:
•
Section 3.1, “Signal Descriptions,” page 3-1
•
Section 3.2, “Electrical Characteristics,” page 3-7
•
Section 3.3, “Mechanical Drawings,” page 3-20
3.1 Signal Descriptions
The LSI53C180 is packaged in a 192-pin Ball Grid Array (BGA) shown
in
Figure 3.1 and Figure 3.2 . The LSI53C180 signal grouping is shown in
Figure 3.3 . Tables 3.1 through 3.4 list the signal descriptions grouped by
function:
•
SCSI A Side Interface Pins ( Table 3.1 )
•
SCSI B Side Interface Pins ( Table 3.2 )
•
Chip Interface Control Pins ( Table 3.3 )
•
Power and Ground Pins ( Table 3.4 )
Figure 3.1 and Figure 3.2 display the left and right halves of the
LSI53C180 192-pin BGA top view.