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Fujitsu MHT2060BH Manual Do Utilizador

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Interface 
 
5-6 C141-E203-01EN 
5.1.3 Electrical specifications 
Table 5.1  Physical Layer Electrical Requirements (1/2) 
 Nom 
Min 
Max 
Units 
Comments 
T,UI  
666.43 
670.12 
ps 
Operating data period (nominal value 
architecture specific) 
t
rise
 
0.3 
0.15 
0.41 
UI 
20%-80% at transmitter 
t
fall
 
0.3 
0.15 
0.41 
UI 
80%-20% at transmitter 
V
cm,dc
 
250 
200 
450 
mV 
Common mode DC level measured at 
receiver connector 
V
cm,ac coupled TX
 
 
0 
2.0 
V 
Transmitter common mode DC level 
measured at TX pins 
V
cm,ac coupled RX
 
 
0 
2.0 
V 
Receiver common mode DC level 
measured at RX pins 
F
CM
 
 
2 
200 
MHz 
Sinusoidal common-mode noise 
components inside this frequency range 
with an amplitude of Vcm,ac. 
T
settle,CM
 
 
 
10 
ns 
Maximum time for common-mode 
transients to and from the idle bus 
condition  
V
diff,tx
 
500 400 600 mV
p-p
  +/- 250 mV differential nominal. 
Measured at Serial ATA connector on 
transmit side 
V
diff,rx
 
400 325 600 mV
p-p
  +/- 200 mV differential nominal. 
Measured at Serial ATA connector on 
receive side 
Tx pair 
differential 
impedance 
100 
85 
115 
Ohm 
As seen by a differential TDR with 100 ps 
(max) edge looking into connector  
(20%-80%). Measured with TDR in 
differential mode. 
Rx pair 
differential 
impedance 
100 
85 
115 
Ohm 
As seen by a differential TDR with 100 ps 
(max) edge looking into connector  
(20%-80%). Measured with TDR in 
differential mode. 
Tx single-ended 
impedance 
 
40 
 
Ohm 
As seen by TDR with 100 ps (max) edge 
looking into connector (20%-80%). 
TDR set to produce simultaneous positive 
pulses on both signals of the Tx pair.