Technical Note
17/19
BU7963GUW
www.rohm.com
2010.04 - Rev.A
© 2010 ROHM Co., Ltd. All rights reserved.
●
High-speed Channel Characteristic
Table 18. High-speed channel characteristic
Ta=25°C, DVDD=MSVDD=1.80V and DGND=MSGND=0.00V, unless otherwise noted.
Parameter Symbol
Limits
Unit Conditions
Min Typ Max
Differential Voltage Range
V
diff_tx
100 150 200
mVpp
Common Mode Voltage Range
V
cm_tx
0.8 0.9 1.0 V
Vdiff_tx Rise Time
t
r_tx
200 - 500 ps
Vdiff_tx Fall Time
t
f_tx
200 - 500 ps
Operating Frequency
f
opr_tx
- - 225
MHz
TX Hi-Z State Leak Current
I
LEAK_TX
-3
-
3
µA
Shutdown mode or standby mode
OutP(D0+,D1+,D2+)
Vcm_tx
Single-ended
OutN(D0-,D1-,D2-)
Differential
(OutP-OutN)
Vdiff_tx
0
fopr_tx
20%
60%
20%
tr_tx
tf_tx
Fig.15. High-Speed Channel Electrical Characteristics
Fig.16 shows high-speed channel equivalent schematic.
Fig.16. high-speed channel equivalent schematic.
MSVDD
MSGND
MSDL3 TX
Logical input
to
MSDL 3 TX
Transmission
line
R
TX
/
2
R
TX
/
2
VO+
VO -
I
LEAK_TX
I
LEAK_TX
I
LEAK_RX
I
LEAK_RX
R
RX
/
2
R
RX
/
2
MSGND
I
PULL_RX
MSVDD
VI+
VI-
Logical output
from
MSDL 3 RX
MSDL3 RX
MSGND
MSGND
MSVDD
V
CM
Link detection
comparator
output
V
LINK_RX
