 English |
|
|
|
|
|
|
|
| SP3481 Datasheet, PDF (6/9 Pages) Sipex Corporation – +3.3V Low Power Half-Duplex RS-485 Transceivers with 10Mbps Data Rate | |||
| |||
| ◁ |
3V
INPUT
0V
VOH
Y OUTPUT
VOL
1.5V
tPLH
VOM
1.5V
tPHL
VOM
VOH
Z OUTPUT
VOL
tPHL
VOM
tPLH
VOM
VOM =
VOH + VOL
2
â 1.5V
IN
1.5V
tDO1
90%
50%
OUT
10%
tTD
1.5V
tDO2
90%
50%
10%
tTD
3V
0V
2.0V
-2.0V
Figure 8. Driver Propagation Delay Waveforms
3V
DE
0V
VOH
OUTPUT
HIGH
0V
VCC
OUTPUT
LOW
VOL
1.5V
1.5V
tPZH
VOM
tPHZ
0.25V
tPZL
VOM
tPLZ
0.25V
VOM =
VOH + VOL
2
â 1.5V
Figure 10. Driver Enable and Disable Timing Waveforms
Figure 9. Driver Differential Output Delay and Transition
Time Waveforms
3V
INPUT
0V
VCC
OUTPUT
0V
1.5V
tRPLH
VOM
1.5V
tRPHL
VOM
VOM =
VCC
2
Figure 11. Receiver Propagation Delay Waveforms
3V
RE
0V
VOH
OUTPUT
0V
S1 is open
S2 is closed
S3 = 1.5V
1.5V
1.5V
tPRHZ
10%
tPRZH
tPRSH
1.5V
3V
RE
0V
VCC
OUTPUT
VOL
S1 is closed
S2 is open
S3 = -1.5V
1.5V
1.5V
tPRLZ
10%
tPRZL
tPRSL
1.5V
Figure 12. Receiver Enable and Disable Waveforms
NOTE 1: The input pulse is supplied by a generator with the following characteristics:
PRR=250KHz, 50% duty cycle, tr < 6.0ns, Z0=50â¦.
NOTE 2: CL includes probe and stray capacitance.
10/15/02
SP3481/3485 Low Power Half-Duplex RS485 Transceivers
© Copyright 2000 Sipex Corporation
6
|
▷ |
German
Russian
Spanish
Italian
Polish
Chinese
Japanese
Korean
French
Portuguese