MAX489 MAXIM [Maxim Integrated Products], MAX489 Datasheet - Page 10

• Manufacturer Part Number: MAX489
• Description: Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers
• Manufacturer: MAXIM [Maxim Integrated Products]

Low-Power, Slew-Rate-Limited
RS-485/RS-422 Transceivers
Figure 8. Driver Propagation Delays
Figure 10. Receiver Propagation Delays
Table 1. Transmitting
10
_______________________________________________________Switching Waveforms
V
X = Don't care
High-Z = High impedance
*
_________________Function Tables
RO
A-B
DIFF
DI
Shutdown mode for MAX481/MAX483/MAX487
V
-V
V
RE
V
-V
OH
OL
X
X
0
1
______________________________________________________________________________________
3V
0V
V
0V
ID
ID
Y
O
O
Z
V
1/2 V
O
1.5V
0V
t
R
10%
INPUTS
O
DE
1
1
0
0
90%
1.5V
t
PLH
V
t
t
PHL
SKEW =
DIFF
DI
1
0
X
X
INPUT
= V (Y) - V (Z)
| t
PLH
OUTPUT
- t
High-Z
High-Z
PHL
t
t
PHL
PLH
Z
0
1
|
t
F
OUTPUTS
90%
*
1.5V
0V
1.5V
High-Z
High-Z
Y
1
0
10%
1/2 V
*
O
(MAX481/MAX483/MAX485/MAX487/MAX1487)
Figure 9. Driver Enable and Disable Times (except MAX488 and
MAX490)
Figure 11. Receiver Enable and Disable Times (except MAX488
and MAX490)
Table 2. Receiving
X = Don't care
High-Z = High impedance
*
RO
RO
RE
DE
V
Shutdown mode for MAX481/MAX483/MAX487
Y, Z
Y, Z
V
3V
0V
0V
CC
3V
0V
0V
OL
RE
0
0
0
1
1.5V
1.5V
INPUTS
DE
0
0
0
0
2.3V
1.5V
2.3V
1.5V
t
t
t
t
ZL(SHDN)
ZH(SHDN)
ZL(SHDN)
ZH(SHDN)
OUTPUT NORMALLY HIGH
OUTPUT NORMALLY HIGH
OUTPUT NORMALLY LOW
OUTPUT NORMALLY LOW
Inputs open
, t
, t
, t
, t
ZL
ZL
> +0.2V
ZH
ZH
< -0.2V
A-B
X
t
t
t
HZ
t
HZ
LZ
LZ
OUTPUT
High-Z
RO
1.5V
1.5V
1
0
1
V
V
V
V
OL
OH
OL
OH
*
+0.5V
+ 0.5V
-0.5V
- 0.5V