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MAX485EESA 其他数据使用手册 - Maxim Integrated(美信)
制造商:
Maxim Integrated(美信)
分类:
接口芯片
封装:
SOIC-8
描述:
RS-485/RS-422收发器
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MAX485EESA数据手册
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Selector Guide
General Description
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.
Applications
RS-422/RS-485 Communications
Truck and Trailer Applications
Industrial Networks
Telecommunications Systems
Automotive Applications
HVAC Controls
Features
♦ ±15kV ESD Protection
♦ ±60V Fault Protection
♦ Guaranteed 10Mbps Data Rate
(MAX3441E/MAX3443E)
♦ Hot Swappable for Telecom Applications
♦ True Fail-Safe Receiver Inputs
♦ Enhanced Slew-Rate-Limiting Facilitates
Error-Free Data Transmission
(MAX3440E/MAX3442E/MAX3444E)
♦ Allow Up to 128 Transceivers on the Bus
♦ -7V to +12V Common-Mode Input Range
♦ Automotive Temperature Range (-40°C to +125°C)
♦ Industry-Standard Pinout
MAX3440E–MAX3444E
±15kV ESD-Protected, ±60V Fault-Protected,
10Mbps, Fail-Safe RS-485/J1708 Transceivers
________________________________________________________________ Maxim Integrated Products 1
TOP VIEW
1
2
3
4
8
5
V
CC
GND
DI
DE/RE
RO
FAULT
R
D
Rt
Rt
7
6
D
R
DE/RE
FAULT
DI
RO
A
B
1
2
3
4
8
7
6
5
V
CC
B
A
GND
DI
DE/RE
RO
FAULT
DIP/SO DIP/SO
B
A
MAX3440E
MAX3441E
R
D
Pin Configurations and Typical Operating Circuits
Ordering Information
19-2666; Rev 1; 12/05
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.
PART TEMP RANGE PIN-PACKAGE
MAX3440EESA -40°C to +85°C 8 SO
MAX3440EEPA -40°C to +85°C 8 PDIP
MAX3440EASA -40°C to +125°C 8 SO
MAX3440EAPA -40°C to +125°C 8 PDIP
PART TYPE
DATA RATE
(Mbps)
LOW-POWER
SHUTDOWN
RECEIVER/DRIVER
ENABLE
TRANSCEIVERS
ON BUS
HOT SWAP
MAX3440E RS-485 0.25 No Yes 128 Yes
MAX3441E RS-485 2.5 to 10 No Yes 128 Yes
MAX3442E RS-485 0.25 Yes Yes 128 Yes
MAX3443E RS-485 2.5 to 10 Yes Yes 128 Yes
MAX3444E J1708 0.25 Yes Yes 128 Yes (only RE)
Ordering Information continued at end of data sheet.
Pin Configurations and Typical Operating Circuits continued at end of data sheet.
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