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MAX13450E_1011

Description
RS-485 Transceivers with Integrated 100Ω/120Ω Termination Resistors
File Size2MB,17 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
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MAX13450E_1011 Overview

RS-485 Transceivers with Integrated 100Ω/120Ω Termination Resistors

19-5254; Rev 1; 11/10
RS-485 Transceivers with Integrated
100
/120
Termination Resistors
General Description
The MAX13450E/MAX13451E are half-duplex and full-
duplex RS-485/RS-422 transceivers. These devices fea-
ture internal 100I and 120I termination resistors. The
resistor values are pin selectable. A logic supply input
allows interfacing to logic levels down to +1.8V.
The MAX13450E/MAX13451E feature strong drivers
specified to drive low-impedance lines found when a
fully loaded bus, based on today’s 100I characteristic
impedance cable, is doubly terminated. Both devices
allow slew-rate limiting of the driver output to reduce EMI
and reflections for data rates up to 500kbps.
The MAX13451E has a FAULT alarm indication output to
signal to the system that an error condition exists in the
driver. The MAX13451E also features a logic inversion
function. The logic inversion allows phase reversal of the
A-B signals in case these are inadvertently connected
wrongly.
The MAX13450E/MAX13451E have 1/8-unit load receiver
input impedance, allowing up to 256 transceivers on the
bus. All driver outputs are protected to
Q30kV
ESD using
the Human Body Model (HBM).
The MAX13450E/MAX13451E are available in a 14-pin
TSSOP package and operate over the automotive -40NC
to +125NC temperature range.
Resistors
S
Driver Drives 100I Double Termination
S
20Mbps (max) Data Rate
S
Pin-Selectable Slew-Rate Limiting
S
Logic Supply Input Allows Interfacing Down to 1.8V
S
Driver Fault-Indication Output (MAX13451E)
S
Inverting of A, B Line Polarity (MAX13451E)
S
High-Impedance Driver Output/Receiver Input
Features
S
100I/120I Pin-Selectable Internal Termination
MAX13450E/MAX13451E
When V
CC
Supply is Removed
S
Hot-Swap Input Structure on DE,
RE,
and
TERM
S
Extended ESD Protection
±30kV Human Body Model
±15kV Air Gap Discharge per IEC 61000-4-2
±7kV Contact Discharge per IEC 61000-4-2
S
1/8-Unit Load Allows Up to 256 Transceivers on
the Bus
S
Thermal and Overcurrent Protected
S
Fail-Safe Receivers
S
+4.5V to +5.5V Supply Voltage Range
Applications
Industrial Control Systems
Portable Industrial Equipment
Motor Control
Security Networks
Medical Networks
Functional Diagram (MAX13451E)
V
L
V
CC
SRL
INV
DI
FAULT
DE
TERM
LOGIC
LOGIC-LEVEL
TRANSLATION
RE
A
B
D
MAX13451E
Ordering Information/
Selector Guide
PART
MAX13450EAUD+
MAX13451EAUD+
HALF/FULL
DUPLEX
Full
Half
PIN-PACKAGE
14 TSSOP-EP*
14 TSSOP-EP*
Note:
All devices are specified over the -40°C to +125°C
operating temperature range.
+Denotes
a lead(Pb)-free/RoHS-compliant package.
*EP
= Exposed pad.
RO
TERM100
GND
_______________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.

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