Rainbow Electronics MAX3079E - Manual (Page 9)

MAX3070E–MAX3079E
+3.3V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
_______________________________________________________________________________________ 9
Test Circuits and Waveforms
DRIVER PROPAGATION DELAY (500kbps)
MAX3070E toc18
400ns/div
V Y - V Z
2V/div
DI
2V/div
DRIVER PROPAGATION DELAY (16Mbps)
MAX3070E toc19
10ns/div
V Z
1V/div
V Y
1V/div
DI
2V/div
RECEIVER PROPAGATION DELAY (16Mbps)
MAX3070E toc20
20ns/div
V A
1V/div
V B
1V/div
RO
2V/div
Typical Operating Characteristics (continued)
(V CC = 3.3V, T A = +25°C, unless otherwise noted.)
Y
Z
V OD
V OC
R L /2
R
L
/2
Figure 1. Driver DC Test Load
DI
DE
3V
Z
Y
V OD
R L C L
Figure 2. Driver Timing Test Circuit
DI
V CC
0
Z
Y
V O
0
-V O
V O
V CC /2
t DPLH t DPHL
1/2 V O
10%
t
DR
90% 90%
1/2 V
O
10%
t DF
V DIFF = V (Y) - V (Z)
V DIFF
t SKEW = | t DPLH - t DPHL |
Figure 3. Driver Propagation Delays