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Numéro de référence | MAX3467EPA | ||
Description | +5V / Fail-Safe / 40Mbps / Profibus RS-485/ RS-422 Transceivers | ||
Fabricant | Maxim Integrated | ||
Logo | |||
1 Page
19-3038; Rev 0; 10/03
+5V, Fail-Safe, 40Mbps, Profibus RS-485/
RS-422 Transceivers
General Description
The MAX3465–MAX3469 are high-speed differential
bus transceivers for RS-485 and RS-422 communica-
tions. They are designed to meet TIA/EIA-422-B,
TIA/EIA-485-A, V.11, and X.27 standards. The trans-
ceiver complies with the Profibus specification provid-
ing +2.1V minimum output level with a 54Ω load,
40Mbps data rate, and output skew less than 2ns. Each
part contains one three-state differential line driver and
one differential input line receiver. The devices operate
from a +5V supply and feature true fail-safe circuitry,
which guarantees a logic-high receiver output when the
receiver inputs are open or shorted. This enables all
receiver outputs on a terminated bus to output logic
highs when all transmitters are disabled.
All devices feature a 1/4-standard-unit load receiver
input impedance that allows 128 transceivers on the
bus. Driver and receiver propagation delays are guar-
anteed under 20ns for multidrop, clock distribution
applications. Drivers are short-circuit current limited
and are protected against excessive power dissipation
by thermal-shutdown circuitry. The driver and receiver
feature active-high and active-low enables, respective-
ly, that can be connected together externally to serve
as a direction control.
Features
o Recommended for Profibus Applications
o Up to 40Mbps Data Rate
o 15ns Transmitter Propagation Delay
o 20ns Receiver Propagation Delay
o 2ns Transmitter and Receiver Skew
o High Differential Driver Output Level (2.1V on 54Ω)
o Hot-Swap Versions
o 1µA Shutdown Supply Current
o Low Supply Current Requirements (2.5mA, typ)
o Allow Up to 128 Transceivers on the Bus
o True Fail-Safe Receiver while Maintaining EIA/TIA-
485 Compatibility
o Designed for Multipoint Transmissions on Long
or Noisy Bus Lines
o Full-Duplex and Half-Duplex Versions Available
o Phase Controls to Correct for Twisted-Pair
Reversal for 14-Pin Versions
o Current-Limiting and Thermal Shutdown for
Driver Overload Protection
Applications
High-Speed RS-485 Communications
High-Speed RS-422 Communications
Level Translators
Industrial-Control Local Area Networks
Profibus Applications
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX3465CSD
0°C to +70°C 14 SO
MAX3465CPD
0°C to +70°C 14 Plastic DIP
MAX3465ESD
-40°C to +85°C 14 SO
MAX3465EPD
-40°C to +85°C 14 Plastic DIP
Ordering Information continued at end of data sheet.
Pin Configurations appear at end of data sheet.
PART
NUMBER
MAX3465
MAX3466
MAX3467
MAX3468
MAX3469
Selector Guide
HALF/FULL
DUPLEX
Full
Full
Full
Half
Half
RECEIVER/
DRIVER
ENABLE
Yes
Yes
No
Yes
Yes
LOW-
POWER
SHUTDOWN
Yes
Yes
No
Yes
Yes
HOT SWAP
Yes
No
No
Yes
No
RECEIVER/
DRIVER PHASE
SELECT
Yes
Yes
No
No
No
INDEPENDENT
SHDN PIN
Yes
Yes
No
No
No
PIN COUNT
14
14
8
8
8
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
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Pages | Pages 14 | ||
Télécharger | [ MAX3467EPA ] |
No | Description détaillée | Fabricant |
MAX3467EPA | +5V / Fail-Safe / 40Mbps / Profibus RS-485/ RS-422 Transceivers | Maxim Integrated |
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