Rainbow Electronics MAX3295 - Manual (Page 5)

MAX3293/MAX3294/MAX3295
20Mbps, +3.3V, SOT23 RS-485/
RS-422 Transmitters
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Y
Z
V OD
R
R
V
OC
DI
DE
3V
Y
V ID
C L
C L
R DIFF
Z
DI
3V
0V
Z
Y
V O
0V
-V O
V O
1.5V
1/2 V O
1/2 V O
t PLH
t F t R
t PHL
10%
90% 90%
1.5V
10%
V DIFF = V (Y) - V (Z)
t SKEW = | t PLH - t PHL |
V DIFF
f = 1MHz, t R
≤ 3ns, t
F
≤ 3ns
S1
S2
OUTPUT
UNDER TEST
V CC
C L
R
L
Figure 1. Driver DC Test Load
Figure 2. Driver Timing Test Circuit
Figure 3. Driver Propagation Delays
Figure 4. Enable/Disable Timing Test Load
OUTPUT NORMALLY LOW
OUTPUT NORMALLY HIGH
3V
0V
Y, Z
V OL
Y, Z
0V
1.5V 1.5V
V OL + 0.25V
V OH - 0.25V
2.3V
2.3V
t ZL(SHDN) , t ZL
t LZ
t ZH(SHDN) , t ZH
t HZ
DE
Figure 5. Driver Enable and Disable Times
Test Circuits and Timing Diagrams