MAX14941 Datasheet, PDF (9/21 Pages) Maxim Integrated Products – 5kV Isolated 20Mbps Half-Duplex PROFIBUS

MAX14941/MAX14942
5kV Isolated 20Mbps Half-Duplex PROFIBUS/
RS-485 Transceivers with ±35kV ESD Protection
A
f = 1MHz, t_LH P 3ns, t_HL P 3ns
1V
B
-1V
t_RPHL
t_RPLH
V_OH
RXD
V_DDA
2
V_DDA
2
V_OL
t_{RSKEW =} |t_RPHL - t_RPLH|
Figure 8. Receiver Propagation Delays
+1.5V
S3
R_L
S1
-1.5V
1kI
VID R ^RXD
S2
CL
GNDB
15pF
RE
GENERATOR
50I
VDDA
GNDA
RE
RXD
RE
50%
t_RHZ
0.25V
RXD
GNDA
VDDA
S1 OPEN
50%
S2 CLOSED
GNDA ^{S3 = +1.5V}
tRZH
V_OH
VDDA
2
GNDA
VDDA _{S1 OPEN}
S2 CLOSED
S3 = +1.5V
GNDA
V_OH
GNDA
VDDA
S1 CLOSED
RE
50%
S2 OPEN
S3 = -1.5V
GNDA
tRZL
VDDA
V_DDA
RXD
2
VOL
RE
50%
tRLZ
RXD
0.25V
VDDA
S1 CLOSED
S2 OPEN
S3 = -1.5V
GNDA
VDDA
VOL
Figure 9. Receiver Enable and Disable Times
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