Seagate ST3146756FC (FDE) ユーザーズマニュアル

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Cheetah 15K.6 FC Product Manual, Rev. C

Fault and Active LED signals are located in the FC-SCA connector (J1). See Table 33 for the output character-
istics of the LED drive signals.      

The serial output signal voltage characteristics are provided in Table 34. The outputs are not AC coupled in 
order to deliver maximum signal without rise and fall time degradation. You must AC couple the receiver to iso-
late potentially different DC characteristics of the outputs and the receiver.

Figure 18 provides the data output valid eye diagram relative to the bit cell time.

The serial input signal voltage characteristics are provided in Table 35.

LED off, high

0 < I

OH

 < 100µA

LED on, low

I

OL

 < -30 mA

0 < V

OL

 < 0.8V

Serial output voltage swing

600 < V

out

 < 1300 mV

Centered at 1.32V

Serial input voltage swing

200 < V

in

 < 1.300 mV

AC coupled

Bit Time

Vout (mv)

XMIT Eye