MAX14770E_13 Datasheet, PDF (6/16 Pages) Maxim Integrated Products – High-ESD Profibus RS-485 Transceiver

MAX14770E
High-ESD Profibus RS-485 Transceiver
A
VOD
B
RL
2
RL
2
V_OC
Figure 1. Driver DC Test Load
VCC
DE
DI
A
B
V_CC
DE
DI
VCC
A
B
195I
110I V_OD
195I
Figure 2. VODPP Swing Under Profibus Equivalent Load Test
VID
RL
CL
Figure 3. Driver Timing Test Circuit
VCC
DI
1.5V
0
B
A
VO
VO
VDIFF 0
-VO
1/2 VO
20%
tLH
f = 1MHz, tLH P 3ns, tHL P 3ns
1.5V
tDPLH
tDPHL
V_DIFF = V_A - V_B
80%
80%
tHL
tDSKEW = |tDPLH - tDPHL|
Figure 4. Driver Propagation Delays
6  
1/2 VO
20%
Maxim Integrated