MAX13431EEUB+ Maxim Integrated Products, MAX13431EEUB+ Datasheet - Page 17

• Manufacturer Part Number: MAX13431EEUB+
• Description: TXRX RS-485 16MBPS HALF 10MSOP
• Manufacturer: Maxim Integrated Products
• Type: Transceiverr

Specifications of MAX13431EEUB+

• Number Of Drivers/receivers: 1/1
• Protocol: RS485
• Voltage - Supply: 3 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 10-MSOP, Micro10™, 10-uMAX, 10-uSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The standard RS-485 receiver input impedance is a
one-unit load (12kΩ), and the standard driver can drive
up to 32 unit loads. The MAX13430E family of trans-
ceivers has a 1/8-unit load receiver input impedance
(96kΩ), allowing up to 256 transceivers to be connect-
ed in parallel on one communication line. Any combina-
tion of these devices, as well as other RS-485
transceivers with a total of 32-unit loads or less, can be
connected to the line.
The MAX13430E/MAX13432E feature reduced slew-
rate drivers that minimize EMI and reduce reflections
caused by improperly terminated cables, allowing
error-free data transmission up to 500kbps.
Applications Information
Reduced EMI and Reflections
______________________________________________________________________________________
256 Transceivers on the Bus
RS-485 Transceivers with Low-Voltage
Two mechanisms prevent excessive output current and
power dissipation caused by faults or by bus con-
tention. The first, a foldback current limit on the output
stage, provides immediate protection against short cir-
cuits over the whole common-mode voltage range (see
the Typical Operating Characteristics .) The second, a
thermal-shutdown circuit, forces the driver outputs into
a high-impedance state if the die temperature exceeds
+150°C (typ).
The MAX13430E/MAX13433E transceivers are
designed for bidirectional data communications on mul-
tipoint bus transmission lines. Figures 11 and 12 show
typical network applications circuits. To minimize reflec-
tions, terminate the line at both ends with its character-
istic impedance, and keep stub lengths off the main
line as short as possible. The slew-rate-limited
MAX13430E/MAX13432E allow the RS-485 network to
be more tolerant of imperfect termination.
Logic Interface
Driver Output Protection
Typical Applications
17