Datasheet

MAX3471
1.6µA, RS-485/RS-422, Half-Duplex,
Differential Transceiver for Battery-Powered Systems
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 1998 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
S2
12k
C
L
V
CC
S1
OUTPUT
UNDER TEST
Figure 4. Driver Enable/Disable Timing Test Load
A
B
C
L
RE
V
ID
RECEIVER
OUTPUT
RECEIVER
Figure 9. Receiver Propagation Delay and Maximum Data-
Rate Test Circuit
10% 10%
A
0V
DI
V
CC
0V
V
O
V
DIFF
-V
O
B
t
DPLH
t
DR
t
DF
V
DIFF
= V
(A)
- V
(B)
t
DSKEW
= (t
DPLH -
t
DPHL
)
t
DPHL
V
O
1/2 V
O
1/2 V
O
90% 90%
V
CC
2
V
CC
2
Figure 5. Driver Differential Propagation Delay and Rise/Fall Times
0V
DE
V
CC
V
TEST
V
TEST
= 0.91V
CC
0V
A, B
V
OL
V
OH
V
OL
+ 0.5V
V
OH
- 0.5V
A, B
t
DHZ
t
DLZ
t
DZL
t
DZH
OUTPUT NORMALLY HIGH
OUTPUT NORMALLY LOW
V
CC
2
V
CC
2
V
CC
2
V
CC
2
Figure 6. Driver Enable and Disable Times
A
INPUT
OUTPUT
B
t
RPHL
|V
ID
| = 2V
t
RSKEW
= (t
RPLH
= t
RPHL
)
V
OL
V
OH
R
O
t
RPLH
1.4V 1.4V
Figure 7. Receiver Propagation Delay
0V
V
CC
0V
RO
V
CC
V
OL
V
OH
V
OL
+ 0.5V
V
OH
- 0.5V
RO
t
RHZ
t
RLZ
t
RZL
t
RZH
1.4V
1.4V
OUTPUT NORMALLY HIGH
OUTPUT NORMALLY LOW
V
CC
2
V
CC
2
RE
Figure 8. Receiver Enable and Disable Times
___________________Chip Information
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