ADM485E_15 Datasheet, PDF (12/16 Pages) Analog Devices – Half-Duplex, RS-485/RS-422 Transceivers

ADM485E/ADM487E/ADM1487E
+1.5V
–1.5V
S3
V_ID
0V OR 5V
GENERATOR
50Ω
1kΩ
C_L
15pF
S1
V_CC
S2
S1 OPEN
S2 CLOSED
S3 = +1.5V
RE
t_RZH, t_RZH(SHDN)
RO
+5V
0V
V_OH
+1.5V
0V
S1 CLOSED
S2 OPEN
S3 = –1.5V
RE
t_RZL, t_RZL(SHDN)
RO
+5V
+1.5V
0V
V_CC
+1.5V
V_OL
S1 OPEN
S2 CLOSED
S3 = +1.5V
RE
+1.5V
t_RHZ
S1 CLOSED
S2 OPEN
S3 = +1.5V
+5V
+5V
RE
+1.5V
0V
0V
t_RLZ
V_OH
V_CC
+0.5V
RO
RO
0V
+0.5V
V_OL
Figure 25. Receiver Enable and Disable Times
Rev. B | Page 12 of 16