MAX3463 Просмотр технического описания (PDF) - Maxim Integrated
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MAX3463 Datasheet PDF : 14 Pages
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+5V, Fail-Safe, 20Mbps, Profibus RS-485/
Y
VOD
Z
R
R
VOC
Figure 5. Driver DC Test Load
3V
DE
DI
Y
VID
RDIFF
CL
Z
Figure 6. Driver Timing Test Circuit
OUTPUT
UNDER TEST
RL
CL
VCC
S1
S2
Figure 8. Enable/Disable Timing Test Load
3V
DE
1.5V
0
tZL(SHDN), tZL
tLZ
Y, Z
VOL
2.3V OUTPUT NORMALLY LOW
OUTPUT NORMALLY HIGH
Y, Z
2.3V
0
tZH(SHDN), tZH
tHZ
Figure 9. Driver Enable and Disable Times
1.5V
VOL + 0.5V
VOH - 0.5V
VOH
RO
VOL
1V A
-1V B
ƒ = 1MHz, tR ≤ 3ns, tF ≤ 3ns
1.5V
OUTPUT
1.5V
tPHL
tPLH
INPUT
Figure 10. Receiver Propagation Delays
3V
DI
1.5V
0
ƒ = 1MHz, tR ≤ 3ns, tF ≤ 3ns
tPLH
tPHL
1.5V
1/2 VO
Z
VO
Y
1/2 VO
VDIFF = V (Y) - V (Z)
VO
VDIFF 0
90%
-VO
10%
90%
10%
tR
tF
tSKEW = | tPLH - tPHL |
Figure 7. Driver Propagation Delays
3V
RE
0
VCC
RO
RO
0
1.5V
1.5V
tZL(SHDN), tZL
tLZ
1.5V OUTPUT NORMALLY LOW
OUTPUT NORMALLY HIGH
1.5V
tZH(SHDN), tZH
tHZ
VOL + 0.5V
VOH - 0.5V
Figure 11. Receiver Enable and Disable Times
10 ______________________________________________________________________________________
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