MAX487ECUA-T Maxim Integrated, MAX487ECUA-T Datasheet - Page 11

• Manufacturer Part Number: MAX487ECUA-T
• Description: RS-422/RS-485 Interface IC
• Manufacturer: Maxim Integrated

Specifications of MAX487ECUA-T

• Data Rate: 250 Kbps
• Operating Supply Voltage: 4.75 V to 5.25 V
• Supply Current: 0.4 mA
• Operating Temperature Range: 0 C to + 70 C
• Input Voltage: 4.75 V to 5.25 V
• Maximum Power Dissipation: 727 mW
• Output Voltage: - 8 V to + 12.5 V
• Product: RS-422/RS-485 Combination

Maxim Integrated
Figure 10. Driver/Receiver Timing Test Circuit
Figure 12. Driver Propagation Delays
Figure 14. Receiver Propagation Delays
V
DIFF
RO
A-B
DI
-V
-V
V
V
V
V
3V
0V
0V
OH
OL
Y
ID
ID
Z
O
O
DI
V
1/2 V
O
1.5V
DE
t
0V
R
10%
3V
O
±15kV ESD-Protected, Slew-Rate-Limited,
Y
Z
Low-Power, RS-485/RS-422 Transceivers
V
90%
ID
t
PLH
1.5V
V
t
SKEW =
DIFF
t
PHL
INPUT
= V (Y) - V (Z)
R
C
C
| t
DIFF
L1
L2
PLH
OUTPUT
- t
PHL
t
PHL
t
PLH
|
t
F
A
B
90%
1.5V
1.5V
0V
RE
MAX487E–MAX491E/MAX1487E
10%
RO
1/2 V
O
Figure 11. Driver Timing Test Load
Figure 13. Driver Enable and Disable Times (except MAX488E
and MAX490E)
Figure 15. Receiver Enable and Disable Times (except MAX488E
and MAX490E)
RO
RO
RE
DE
V
Y, Z
Y, Z
V
3V
0V
CC
0V
3V
0V
0V
OL
UNDER TEST
OUTPUT
1.5V
1.5V
1.5V
1.5V
2.3V
2.3V
C
L
t
t
t
ZL(SHDN)
t
ZH(SHDN)
ZL(SHDN)
ZH(SHDN)
OUTPUT NORMALLY HIGH
OUTPUT NORMALLY LOW
500Ω
OUTPUT NORMALLY HIGH
OUTPUT NORMALLY LOW
, t
, t
, t
, t
ZL
ZH
ZL
ZH
t
t
t
HZ
t
LZ
HZ
LZ
S1
S2
1.5V
1.5V
V
V
V
V
OL
OH
OL
OH
V
CC
+ 0.5V
- 0.5V
+0.5V
-0.5V
11