Seagate ST3450757SS Physical characteristics, Connector requirements, Electrical description

11.4.2 Physical characteristics

This section defines physical interface connector.

11.4.3 Connector requirements

The SAS connector on the drive complies with SFF-8482. Contact your preferred connector manufacturer for mating part information.

The SAS device connector is illustrated in Figures 13 and 14.

11.4.4 Electrical description

SAS drives use the device connector for:

•DC power

•SAS interface

•Activity LED

This connector is designed to either plug directly into a backpanel or accept cables.

11.4.5 Pin descriptions

This section provides a pin-out of the SAS device and a description of the functions provided by the pins.

Table 13 SAS pin descriptions

PIN	SIGNAL NAME	SIGNAL TYPE	PIN	SIGNAL NAME	SIGNAL TYPE
S1	Port A Ground		P1*	NC (reserved 3.3Volts)
S2*	+Port A_in	Diff. input pair	P2*	NC (reserved 3.3Volts)
S3*	-Port A_in		P3	NC (reserved 3.3Volts)
S4	Port A Ground		P4	Ground
S5*	-Port A_out	Diff output pair	P5	Ground
S6*	+Port A_out		P6	Ground
S7	Port A Ground		P7	5 Volts charge
S8	Port B Ground		P8*	5 Volts
S9*	+Port B_in	Diff. input pair	P9*	5 Volts
S10*	-Port B_in		P10	Ground
S11	Port A Ground		P11*	Ready LED	Open collector out
S12*	-Port B_out	Diff output pair	P12	Ground
S13*	+Port B_out		P13	12 Volts charge
S14	Port B Ground		P14*	12 Volts
			P15*	12 Volts

*- Short pin to support hot plugging NC - No connection in the drive.

CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F 50