Datasheet

ADM485E/ADM487E/ADM1487E
Rev. B | Page 12 of 16
06356-010
GENERATOR
+1.5V
–1.5V
0V OR 5V
RE
RO
50Ω
S1
S2
t
RZH,
t
RZH(SHDN)
t
RHZ
+5V
0V
0V
V
OH
+1.5V
+1.5V
+0.5V
S1 OPEN
S2 CLOSED
S3 = +1.5V
RE
RO
t
RZL,
t
RZL(SHDN)
+5V
0V
V
CC
V
OL
+1.5V
+1.5V
RE
RO
+5V
0V
0V
V
OH
S1 OPEN
S2 CLOSED
S3 = +1.5V
S1 CLOSED
S2 OPEN
S3 = –1.5V
t
RLZ
+1.5V
+0.5V
RE
RO
+5V
0V
V
CC
V
OL
S1 CLOSED
S2 OPEN
S3 = +1.5V
S3
V
ID
1kΩ
C
L
15pF
V
CC
Figure 25. Receiver Enable and Disable Times