Rainbow Electronics MAX13486E - Manual (Page 11)

MAX13485E/MAX13486E
Half-Duplex RS-485/RS-422 Transceivers in µDFN
__________________________________________________________________________
+1V
-1V
GENERATOR
V ID
S3
S2
S1
1k Ω
CL
15pF
50 Ω
V CC
RO
RE RE
RO
RE
RO
RO
RE
V CC /2
V
CC
V
CC
V CC
V OL
0
0
0
0
0 0
V
OH
V OH
0.25V
0.25V
V OH /2
S1 OPEN
S2 CLOSED
S3 = +1V S1 CLOSED
S2 OPEN
S3 = -1V
S1 OPEN
S2 CLOSED
S3 = +1V S1 CLOSED
S2 OPEN
S3 = -1V
t RZH , t RZH(SHDN) t RZL , t RZL(SHDN)
t RLZ t RHZ
V CC /2
V CC /2
V CC
(V OL + V CC )/2
V CC
V CC
V OL
V CC /2
Figure 8. Receiver Enable and Disable Times
Test Circuits and Waveforms (continued)