SP505 Datasheet, PDF (13/35 Pages) Sipex Corporation – WAN Multi-Mode Serial Transceiver

Output
U nde r
Test _{C L}
500Ω
S₁
V_CC
S₂
R eceiver
Output
Test P oint
1KΩ
S₁
V_CC
C_RL
1KΩ
S₂
Figure 34. Driver Timing Test Load Circuit
Figure 35. Receiver Timing Test Load Circuit
DRIVER ^+3V
INPUT _0V
A
DRIVER
OUTPUT _B
DIFFERENTIAL ^V_O⁺
OUTPUT 0V
V_A - V_B ^V_O^–
t_SKEW = │t_DPLH - t_DPHL │
f ≥ 5MHz; t_R ≤ 10ns; t_F ≤ 10ns
1.5V
t_PLH
t_PHL
V_O ^1/2VO
t_DPLH
t_DPHL
t_R
Figure 36. Driver Propagation Delays
1.5V
1/2V_O
t_F
TX_{ENABLE +3V}
DEC_X 0V
5V
A, B
V_OL
V_OH
A, B
0V
f = 1MHz; t_R ≤ 10ns; t_F ≤ 10ns
1.5V
t_ZL
2.3V _{Output normally LOW}
2.3V
t_ZH
Output normally HIGH
Figure 37. Driver Enable and Disable Times
1.5V
t_LZ
0.5V
0.5V
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 > 5MHz; t_R < 10ns ; t_F < 10ns
0V
INP UT
OUTP UT
(V OH - V OL )/2
t_PHL
0V
(V OH - VOL )/2
Figure 38. Receiver Propagation Delays
Exar Coporation 48720 Kato Road, Fremont CA, 94538 • [phone] • Fax [phone] • www.exar.com
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SP505_100_081308