MAX14840E Datasheet, PDF (7/15 Pages) Maxim Integrated Products – 40Mbps, +3.3V, RS-485 Half-Duplex Transceivers

40Mbps, +3.3V, RS-485 Half-Duplex
Transceivers
Test and Timing Diagrams (continued)
+1.5V
S3
R
S1
-1.5V
1kI
V_ID R ^RO
VCC
S2
C_L
15pF
RE
GENERATOR
50I
RE
RO
RE
1.5V
t_RHZ
RO
0.25V
VCC
1.5V
tRZH, tRZH(SHDN) ⁰
S1 OPEN
S2 CLOSED
S3 = +1.5V
V_OH
VCC
2
0
VCC _{S1 OPEN}
S2 CLOSED
S3 = +1.5V
0
V_OH
0
Figure 8. Receiver Enable and Disable Times
RE
tRZL, tRZL(SHDN)
RO
1.5V
RE
tRLZ
RO
0.25V
VCC
S1 CLOSED
1.5V
S2 OPEN
0 ^{S3 = -1.5V}
VCC
V_CC
2
VOL
VCC _{S1 CLOSED}
S2 OPEN
S3 = -1.5V
0
VCC
VOL
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