MAX3440E Maxim, MAX3440E Datasheet

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MAX3440E

Manufacturer Part Number
MAX3440E
Description
15kV ESD-Protected / 60V Fault-Protected / 10Mbps / Fail-Safe RS-485/J1708 Transceivers
Manufacturer
Maxim
Datasheet

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The MAX3440E–MAX3444E fault-protected RS-485 and
J1708 transceivers feature ±60V protection from signal
faults on communication bus lines. Each device contains
one differential line driver with three-state output and one
differential line receiver with three-state input. The 1/4-unit-
load receiver input impedance allows up to 128 trans-
ceivers on a single bus. The devices operate from a 5V
supply at data rates of up to 10Mbps. True fail-safe inputs
guarantee a logic-high receiver output when the receiver
inputs are open, shorted, or connected to an idle data line.
Hot-swap circuitry eliminates false transitions on the
data bus during circuit initialization or connection to a
live backplane. Short-circuit current-limiting and ther-
mal shutdown circuitry protect the driver against exces-
sive power dissipation, and on-chip ±15kV ESD
protection eliminates costly external protection devices.
The MAX3440E–MAX3444E are available in 8-pin SO
and PDIP packages and are specified over industrial
and automotive temperature ranges.
19-2666; Rev 0; 10/02
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.
Pin Configurations and Typical Operating Circuits continued at end of data sheet.
MAX3440E
MAX3441E
MAX3442E
MAX3443E
MAX3444E
TOP VIEW
PART
10Mbps, Fail-Safe RS-485/J1708 Transceivers
RS-422/RS-485 Communications
Truck and Trailer Applications
Industrial Networks
Telecommunications Systems
Automotive Applications
HVAC Controls
±15kV ESD-Protected, ±60V Fault-Protected,
FAULT
DE/RE
RO
DI
1
2
3
4
________________________________________________________________ Maxim Integrated Products
RS-485
RS-485
RS-485
RS-485
J1708
TYPE
D
DIP/SO
R
General Description
DATA RATE
8
7
6
5
2.5 to 10
2.5 to 10
(Mbps)
V
GND
B
A
0.25
0.25
0.25
Applications
CC
Pin Configurations and Typical Operating Circuits
FAULT
DE/RE
RO
DI
1
2
3
4
LOW-POWER
SHUTDOWN
D
DIP/SO
R
Yes
Yes
Yes
No
No
7
6
8
5
o ±15kV ESD Protection
o ±60V Fault Protection
o Guaranteed 10Mbps Data Rate
o Hot Swappable for Telecom Applications
o True Fail-Safe Receiver Inputs
o Enhanced Slew-Rate-Limiting Facilitates
o Allow Up to 128 Transceivers on the Bus
o -7V to +12V Common-Mode Input Range
o Automotive Temperature Range (-40°C to +125°C)
o Industry-Standard Pinout
Ordering Information continued at end of data sheet.
B
A
MAX3440EESA
MAX3440EEPA
MAX3440EASA
MAX3440EAPA
V
GND
(MAX3441E/MAX3443E)
Error-Free Data Transmission
(MAX3440E/MAX3442E/MAX3444E)
RECEIVER/DRIVER
CC
Rt
PART
ENABLE
Yes
Yes
Yes
Yes
Yes
MAX3440E
MAX3441E
Ordering Information
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
-40°C to +125°C
-40°C to +125°C
TRANSCEIVERS
Rt
ON BUS
B
A
128
128
128
128
128
Selector Guide
R
D
FAULT
DE/RE
Features
PIN-PACKAGE
8 SO
8 PDIP
8 SO
8 PDIP
Yes (only RE)
HOT SWAP
DI
RO
Yes
Yes
Yes
Yes
1

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