MAX14840E_15 Datasheet, PDF (15/16 Pages) Maxim Integrated Products – 40Mbps, +3.3V, RS-485 Half-Duplex Transceivers

MAX14840E/MAX14841E 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
Figure 15. Typical Half-Duplex RS-485 Network
120Ω
DE
B
B
A
D
DI
A
R
RO
RE
R
D
DI
DE RO RE
protection against short circuits over the whole common-mode
voltage range (see the Typical Operating Characteristics
section). Additionally, a thermal shutdown circuit forces
the driver outputs into a high-impedance 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.
Ordering Information/Selector Guide
PART
FAIL SAFE
MAX14840EASA+
Symmetrical
MAX14840EATA+
MAX14841EASA+
Symmetrical
True
MAX14841EATA+
True
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Chip Information
PROCESS: BiCMOS
Package Information
For the latest package outline information and land patterns, go
to www.maximintegrated.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
TEMP RANGE
-40NC to +125NC
-40NC to +125NC
-40NC to +125NC
-40NC to +125NC
PIN-PACKAGE
8 SO
8 TDFN-EP*
8 SO
8 TDFN-EP*
www.maximintegrated.com
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