sp3508 Exar Corporation, sp3508 Datasheet - Page 18

• Manufacturer Part Number: sp3508
• Description: Rugged 3.3v, 20mbps, 8 Channel Multiprotocol Tranciever With Programmable Dce/dte And Terminination Resistors
• Manufacturer: Exar Corporation

Figure 33. Driver Timing Test Load Circuit
Figure 35. Driver Propagation Delays
Figure 36. Driver Enable and Disable Times
Figure 37. Receiver Propagation Delays
Date: 10/29/04
RECEIVER OUT
Output
Under
Mx or Tx_Enable
Test
t
DIFFERENTIAL
SKEW
t
SKEW =
A – B
= | t
C
OUTPUT
OUTPUT
DRIVER
DRIVER
L
V
| t
INPUT
B
PHL
DPLH -
A, B
A, B
– V
V
V
- t
0D2
A
0D2
V
500Ω
V
PLH
t
OH
DPHL
OL
V
V
+3V
V
+
+3V
–
V
0V
O
0V
O
0V
5V
0V
|
OH
OL
A
B
+
–
|
V
t
PLH
O
S
S
1/2V
1
2
SP3508 Enhanced WAN Multi–Mode Serial Transceiver
O
f > 10MHz; t
1.5V
0V
V
1.5V
f = 1MHz; t
CC
f > 10MHz; t
2.3V
2.3V
(V
OH
t
t
ZH
ZL
t
t
DPLH
PLH
- V
t
R
R
18
< 5ns; t
OL
Output normally HIGH
R
Output normally LOW
)/2
≤ 10ns; t
Figure 34. Receiver Timing Test Load Circuit
R
OUTPUT
t
Receiver
INPUT
t
< 5ns; t
DPHL
F
PHL
Output
< 5ns
F
≤ 10ns
C
F
1.5V
RL
< 5ns
Test Point
t
PHL
1KΩ
t
F
1/2V
© Copyright 2004 Sipex Corporation
1.5V
O
0.5V
0.5V
S
S
0V
1
2
t
t
HZ
(V
LZ
1KΩ
OH
- V
OL
V
)/2
CC