Datasheet

RS-485 Transceivers with Integrated
100 Ω /120 Ω Termination Resistors
MAX13450E/MAX13451E
10 _____________________________________________________________________________________
Test Circuits and Waveforms (continued)
Figure 8. Receiver Enable and Disable Times
Figure 9. Receiver Enable and Disable Times
Figure 10. Termination Resistor Turn-On/-Off Times
V
L
/2
V
L
/2
RO
0V
0V
OUTPUT NORMALLY LOW
RO
OUTPUT NORMALLY HIGH
t
RZH(SHDN)
, t
RZH
t
RHZ
t
RHZ
(V
L
+ V
ROL
)/2
V
ROH
/2
R
OH
- 0.25V
R
OH
+ 0.25V
DI = 0V
RE
V
L
V
L
V
ROH
V
ROL
t
RZL(SHDN)
, t
RZL
RO
500
Ω
S1
S2
V
CC
C
L
90%
10%
0V
V
AB
= V
A
- V
B
R
D
= R
100
OR R
200
V
L
V
L
/2
t
REN
t
REN
I
A
RECEIVERRO
TERM
B
I
A
= V
AB
/R
D
A
TERM