SP3508EB Datasheet, PDF (21/36 Pages) Sipex Corporation – Evaluation Board Manual

Output
U nde r
Test _{C L}
500Ω
S₁
V_CC
S₂
Figure 33. Driver Timing Test Load Circuit
R eceiver
Output
Test P oint
1KΩ
S₁
V_CC
C_RL
1KΩ
S₂
Figure 34. Receiver Timing Test Load Circuit
DR IV E R ^+3V
INP UT _0V
A
DR IV E R
OUTP UT _B
DIFFE R E NTIAL V _O+
OUTP UT 0V
V _B – V _A VO^–
f > 10MHz; t_R < 5ns ; t_F < 5ns
1 .5 V
V _O ^{1/2V O}
t_PLH
t_PHL
t_DPLH
t_DPHL
t_R
t_{SKEW = |} t_{DPLH -} t_{DPHL |}
Figure 35. Driver Propagation Delays
1 .5 V
1/2V _O
t_F
Mx or T x_ E nable +3V
0V
A, B
A, B
5V
V _OL
V _OH
0V
f = 1MHz; t_R ≤ 10ns ; t_F ≤ 10ns
1 .5 V
t_ZL
2 .3 V
O utput normally L O W
2 .3 V
t_ZH
O utput normally H IG H
Figure 36. Driver Enable and Disable Times
1 .5 V
t_LZ
0 .5 V
0 .5 V
t_HZ
A–B
V_0D2 ⁺
V _0D2^–
V _OH
R E CE IVE R OUT
V_OL
t_PLH
t_{SKEW = |} t_{PHL -} t_{PLH |}
f > 10MHz; t_R < 5ns ; t_F < 5ns
0V
INP UT
OUTP UT
(V OH - V OL )/2
t_PHL
0V
(V OH - VOL )/2
Figure 37. Receiver Propagation Delays
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • [phone] • www.exar.com
21
SP3508_100_072208