Hitachi HTS725032A9A364 User Manual

 
Hitachi Global Storage Technologies 

Page 4 

 

version 1.0 

 
Interface connector 
 
The figure below shows the physical pin location 

 

 

ƒ  All pins are in a single row, with a 127 mm (0.050”) pitch. 

ƒ  The comments on the mating sequence in Table in the section 7.3 apply to the case of 

back-plane 

ƒ  blind-mate connector only. In this case, the mating sequences are:(1)the ground pins 

P4 and P12;(2) the pre-charge power pins and the other ground pins; and (3) the 
signal pins and the rest of the power pins. 

ƒ  There are three power pins for each voltage. One pin from each voltage is used for 

pre-charge in the backplane blind-mate situation. 

ƒ  If a device uses 3.3V, then all V33 pins must be terminated. Otherwise, it is optional 

to terminate any of the V33 pins 

ƒ  If a device uses 5.0V, then all V5 pins must be terminated. Otherwise, it is optional to 

terminate any of the V5 pins 

ƒ  If a device uses 12.0V, then all V12 pins must be terminated. Otherwise, it is optional 

to terminate any of the V12 pins.