Seagate ST373554FC ユーザーズマニュアル

72

Cheetah 15K.4 FC Product Manual, Rev. B

Fault and Active LED signals are located in the FC-SCA connector (J1) and through the indicator connector 
(J6). See Table 30 for the output characteristics of the LED drive signals.      

The serial output signal voltage characteristics are provided in Table 31. 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 22 provides the data output valid eye diagram relative to the bit cell time.

The serial input signal voltage characteristics are provided in Table 32.

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