MAX490ECSA+T Maxim Integrated Products, MAX490ECSA+T Datasheet - Page 11

• Manufacturer Part Number: MAX490ECSA+T
• Description: IC TXRX RS485/RS422 8-SOIC
• Manufacturer: Maxim Integrated Products
• Type: Transceiverr

Specifications of MAX490ECSA+T

• Number Of Drivers/receivers: 1/1
• Protocol: RS422, RS485
• Voltage - Supply: 4.75 V ~ 5.25 V
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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
ID
ID
Z
Y
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
10%
RO
1/2 V
O
Figure 13. Driver Enable and Disable Times (except MAX488E
and MAX490E)
and MAX490E)
Figure 11. Driver Timing Test Load
Figure 15. Receiver Enable and Disable Times (except MAX488E
RO
RO
RE
DE
V
Y, Z
Y, Z
3V
0V
CC
0V
V
0V
3V
0V
OL
UNDER TEST
OUTPUT
1.5V
1.5V
1.5V
1.5V
2.3V
2.3V
C
L
t
t
t
ZL(SHDN)
ZH(SHDN)
t
ZL(SHDN)
ZH(SHDN)
OUTPUT NORMALLY HIGH
OUTPUT NORMALLY LOW
500
OUTPUT NORMALLY HIGH
OUTPUT NORMALLY LOW
, t
, t
, t
, t
ZL
ZH
ZL
ZH
t
t
HZ
t
LZ
t
HZ
LZ
S1
S2
1.5V
1.5V
V
V
V
V
OL
OH
V
OL
OH
CC
+ 0.5V
- 0.5V
+0.5V
-0.5V
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