LTC486
Quad Low Power
RS485 Driver
FEATURES DESCRIPTION
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Very Low Power: I = 110A Typ
The LTC 486 is a low power differential bus/line driver
CC
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Designed for RS485 or RS422 Applications
designed for multipoint data transmission standard RS485
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Single 5V Supply
applications with extended common-mode range (12V to
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7V to 12V Bus Common-Mode Range Permits 7V
7V). It also meets RS422 requirements.
GND Difference Between Devices on the Bus
The CMOS design offers significant power savings over
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Thermal Shutdown Protection
its bipolar counterpart without sacrificing ruggedness
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Power-Up/Down Glitch-Free Driver Outputs Permit
against overload or ESD damage.
Live Insertion/Removal of Package
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Driver Maintains High Impedance in Three-State or The driver features three-state outputs, with the driver
with the Power Off outputs maintaining high impedance over the entire
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28ns Typical Driver Propagation Delays with 5ns common-mode range. Excessive power dissipation caused
Skew by bus contention or faults is prevented by a thermal
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Pin Compatible with the SN75172, DS96172, shutdown circuit which forces the driver outputs into a
A96172, and DS96F172 high impedance state.
Both AC and DC specifications are guaranteed from 0C
to 70C (Commercial), 40C to 85C (Industrial), over
APPLICATIONS
the 4.75V to 5.25V supply voltage range.
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Low Power RS485/RS422 Drivers
L, LT, LTC, LTM, Linear Technology, Module and the Linear logo are registered trademarks of
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Level Translator
Linear Technology Corporation. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
RS485 Length Specification
10k
EN EN
1k
4 4
2
1
120 120 3
DI DRIVER
RECEIVER RO
100
1
4000 FT BELDEN 9841
12
1/4 LTC488
1/4 LTC486
EN 486 TA01a
10
10k 100k 1M 2.5M 10M
DATA RATE (bps)
486 TA01b
* APPLIES FOR 24 GAUGE, POLYETHYLENE
DIELECTRIC TWISTED PAIR
486fc
1
CABLE LENGTH (FT)LTC486
ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION
(Note 1)
Supply Voltage (V ) ................................................12V
CC
TOP VIEW
Control Input Voltages .......................0.5V to V + 0.5V
CC
DI1 1 16 V
CC
Driver Input Voltages ...................... 0.5V to V + 0.5V
CC
DO1A 2 15 DI4
Driver Output Voltages ............................................14V
DO1B 3 14 DO4A
Control Input Currents .........................................25mA
EN 4 13 DO4B
Driver Input Currents ...........................................25mA
DO2B 5 12
EN
Operating Temperature Range
DO2A 6 11 DO3B
LTC486C .................................................. 0C to 70C
DI2 7 10 DO3A
LTC486I................................................40C to 85C
GND 8 9 DI3
Storage Temperature Range ................... 65C to 150C
N PACKAGE SW PACKAGE
16-LEAD PLASTIC DIP 16-LEAD PLASTIC SO
Lead Temperature (Soldering, 10 sec) .................. 300C
T = 125C, = 70C/W (N)
JMAX JA
T = 150C, = 95C/W (SW)
JMAX JA
Consult factory for Military grade parts.
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC486CN#PBF LTC486CN#TRPBF LTC486CN 16-Lead Plastic DIP 0C to 70C
LTC486CSW#PBF LTC486CSW#TRPBF LTC486CSW 16-Lead Plastic SO 0C to 70C
LTC486IN#PBF LTC486IN#TRPBF LTC486IN 16-Lead Plastic DIP 40C to 85C
LTC486ISW#PBF LTC486ISW#TRPBF LTC486ISW 16-Lead Plastic SO 40C to 85C
Consult LTC Marketing for parts specified with wider operating temperature ranges.
For more information on lead free part marking, go to: