Rainbow Electronics MAX14770E - Manual

_______________________________________________________________ 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.
High-ESD Profibus RS-485 Transceiver
MAX14770E
General Description
The MAX14770E is a half-duplex, Q35kV high ESD-
protected transceiver for PROFIBUS-DP and RS-485
applications. In addition, it can be used for RS-422/V.11
communications. The MAX14770E is designed to meet
IEC 61158-2, TIA/EIA-422-B, TIA/EIA-485-A, V.11, and
X.27 standards.
The MAX14770E operates from a +5V supply and has
true fail-safe circuitry that guarantees a logic-high receiv-
er output when the receiver inputs are open or shorted.
The MAX14770E features a 1/4 standard-unit load
receiver input impedance, allowing up to 128 1/4 unit
load transceivers on the bus. Drivers are short-circuit
current limited and are protected against excessive
power dissipation by thermal-shutdown circuitry.
The MAX14770E is available in 8-pin SO and tiny TDFN
(3mm x 3mm) packages, and is specified over the extend-
ed (-40NC to +85NC) and automotive (-40NC to +125NC)
temperature ranges.
Applications
PROFIBUS-DP Networks
Industrial Fieldbuses
Motion Controllers
RS-485 Networks
Machine Encoders
Features
S Meets EIA 61158-2 Type 3 PROFIBUS-DP
S
+4.5V to +5.5V Supply Voltage
S 20Mbps Data Rate
S Short-Circuit Protected
S True Fail-Safe Receiver
S Thermal-Shutdown Protected
S Hot Swappable
S High ESD Protection
±35kV Human Body Model (HBM)
±20kV IEC 61000-4-2 Air Gap
±10kV IEC 61000-4-2 Contact
S -40NC to +125NC Automotive Temperature Range
in Tiny 8-Pin (3mm x 3mm) TDFN
19-5017; Rev 0; 10/09
Functional Diagram
Ordering Information
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
*EP = Exposed pad.
The PROFI BUS PROCESS FIELD BUS logo is a registered
trademark of PROFIBUS and PROFINET International (PI).
Typical PROFIBUS-DP Operating Circuit appears at end of
data sheet.
DI
DE
RO
A
D
R
SHUTDOWN
B
RE
MAX14770E
PART TEMP RANGE
PIN-
PACKAGE
TOP
MARK
MAX14770EESA+T -40NC to +85NC 8 SO —
MAX14770EATA+T -40NC to +125NC 8 TDFN-EP* BMG