MAX14840E View Datasheet(PDF) - Maxim Integrated
Part Name
Description
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MAX14840E Datasheet PDF : 15 Pages
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40Mbps, +3.3V, RS-485 Half-Duplex
Transceivers
DI
D
120Ω
B
DE
A
RO
R
RE
MAX14840E
MAX14841E
B
A
R
D
DI
DE RO RE
120Ω
DE
B
B
A
D
DI
A
R
RO
RE
R
D
DI
DE RO RE
Figure 15. Typical Half-Duplex RS-485 Network
immediate protection against short circuits over the
whole common-mode voltage range (see the Typical
Operating Characteristics). Additionally, a thermal shut-
down circuit forces the driver outputs into a high-imped-
ance state if the die temperature exceeds +160NC (typ).
Low-Power Shutdown Mode
Low-power shutdown mode is initiated by bringing RE
high and DE low. In shutdown, the devices draw less
than 10FA of supply current.
RE and DE can be driven simultaneously; the parts are
guaranteed not to enter shutdown if RE is high and DE is
low for less than 50ns. If the inputs are in this state for at
least 800ns, the parts are guaranteed to enter shutdown.
Typical Applications
The MAX14840E/MAX14841E transceivers are designed
for bidirectional data communications on multipoint bus
transmission lines. Figure 15 shows a typical network
application circuit. To minimize reflections, terminate the
line at both ends with its characteristic impedance and
keep stub lengths off the main line as short as possible.
PROCESS: BiCMOS
Chip Information
Package Information
For the latest package outline information and land patterns,
go to www.maxim-ic.com/packages. Note that a “+”, “#”, or
“-” in the package code indicates RoHS status only. Package
drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
PACKAGE TYPE
8 SO
8 TDFN-EP
PACKAGE CODE
S8+4
T833+2
DOCUMENT NO.
21-0041
21-0137
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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
15
© 2010 Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.
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