MAX3440E(2002) 查看數據表（PDF） - Maxim Integrated
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产品描述 (功能)
生产厂家
MAX3440E
(Rev.:2002)
(Rev.:2002)
Maxim Integrated
MAX3440E Datasheet PDF : 20 Pages
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±15kV ESD-Protected, ±60V Fault-Protected,
10Mbps, Fail-Safe RS-485/J1708 Transceivers
MAX3440E
MAX3441E
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2
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3
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4
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5
6
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8
PIN
MAX3442E
MAX3443E
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1
2
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3
4
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5
6
7
8
Pin Description
MAX3444E
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1
2
3
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4
5
6
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8
NAME
FUNCTION
FAULT
RO
RE
DE
DE/RE
DE
DI
TXD
GND
A
B
VCC
Fault output. 1 = fault; 0 = normal operation
A or B under the following conditions:
• A-B differential <200mV
• A shorted to B
• A shorted to a voltage within the common-mode range
(detected only when the driver is enabled)
• B shorted to a voltage within the common-mode range
(detected only when the driver is enabled)
• A or B outside the common-mode range
Receiver Output. If receiver enabled and (A-B) ≥ -50mV,
RO = high; if (A-B) ≤ -200mV, RO = low.
Receiver Output Enable. Pull RE low to enable RO.
Driver Output Enable. Pull DE low to enable the outputs.
Force DE high to three-state the outputs. Drive RE and DE
high to enter low-power shutdown mode.
Driver/Receiver Output Enable. Pull DE/RE low to three-
state the driver output and enable RO. Force DE/RE high to
enable driver output and three-state RO.
Driver Output Enable. Force DE high to enable driver. Pull
DE low to three-state the driver output. Drive RE high and
pull DE low to enter low-power shutdown mode.
Driver Input. A logic low on DI forces the noninverting
output low and the inverting output high. A logic high on
DI forces the noninverting output high and the inverting
output low.
J1708 Input. A logic low on TXD forces outputs A and B to
the dominant state. A logic high on TXD forces outputs A
and B to the recessive state.
Ground
Noninverting Receiver Input/Driver Output
Inverting Receiver Input/Driver Output
Positive Supply, VCC = +4.75V to +5.25V
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