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Linear Technology Electronic Components Datasheet

LTC487IN Datasheet

Quad Low Power RS485 Driver

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LTC487
Quad Low Power
RS485 Driver
Features
n Very Low Power: ICC = 110µA Typ
n Designed for RS485 or RS422 Applications
n Single 5V Supply
n – 7V to 12V Bus Common Mode Range Permits ±7V
GND Difference Between Devices on the Bus
n Thermal Shutdown Protection
n Power-Up/Down Glitch-Free Driver Outputs Permit
Live Insertion/Removal of Package
n Driver Maintains High Impedance in Three-State or
with the Power Off
n 28ns Typical Driver Propagation Delays with
5ns Skew
n Pin Compatible with the SN75174, DS96174,
µA96174, and DS96F174
Applications
n Low Power RS485/RS422 Drivers
n Level Translator
Description
The LTC®487 is a low power differential bus/line driver
designed for multipoint data transmission standard RS485
applications with extended common mode range (– 7V to
12V). It also meets RS422 requirements.
The CMOS design offers significant power savings over
its bipolar counterpart without sacrificing ruggedness
against overload or ESD damage.
The driver features three-state outputs, with the driver
outputs maintaining high impedance over the entire com-
mon mode range. Excessive power dissipation caused
by bus contention or faults is prevented by a thermal
shutdown circuit which forces the driver outputs into a
high impedance state.
Both AC and DC specifications are guaranteed from 0°C to
70°C (Commercial), –40°C to 85°C (Industrial) and over
the 4.75V to 5.25V supply voltage range.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Typical Application
EN 12
4
2
DI 1 DRIVER
3
1/4 LTC487
120Ω
120Ω
4000 FT BELDEN 9841
EN 12
4
2
RECEIVER
3 RO
1
1/4 LTC489
LTC487 TA01
RS485 Cable Length Specification*
10k
1k
100
10
10k
100k
1M 2.5M 10M
DATA RATE (bps)
LTC487 TA09
* APPLIES FOR 24 GAUGE, POLYETHYLENE
DIELECTRIC TWISTED PAIR
487fc



Linear Technology Electronic Components Datasheet

LTC487IN Datasheet

Quad Low Power RS485 Driver

No Preview Available !

LTC487
Absolute Maximum Ratings
(Note 1)
Supply Voltage (VCC).................................................12V
Control Input Voltages..................... –0.5V to VCC + 0.5V
Driver Input Voltages....................... –0.5V to VCC + 0.5V
Driver Output Voltages............................................ ±14V
Control Input Currents..........................................±25mA
Driver Input Currents............................................±25mA
Operating Temperature Range
Commercial.............................................. 0°C to 70°C
Industrial..............................................–40°C to 85°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec.).................. 300°C
Pin Configuration
DI1 1
DO1A 2
DO1B 3
EN12 4
DO2B 5
DO2A 6
DI2 7
GND 8
TOP VIEW
16 VCC
15 DI4
14 DO4A
13 DO4B
12 EN34
11 DO3B
10 DO3A
9 DI3
N PACKAGE
SW PACKAGE
16-LEAD PLASTIC DIP 16-LEAD PLASTIC SO
TJMAX = 125°C, θJA = 70°C/W (N)
TJMAX = 150°C, θJA = 95°C/W (S)
Consult factory for Military grade parts.
Order Information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC487CN#PBF
LTC487CN#TRPBF
LTC487CN
16-Lead Plastic DIP
LTC487CSW#PBF
LTC487CSW#TRPBF
LTC487CSW
16-Lead Plastic SO
LTC487IN#PBF
LTC487IN#TRPBF
LTC487IN
16-Lead Plastic DIP
LTC487ISW#PBF
LTC487IS#TRPBF
LTC487ISW
16-Lead Plastic SO
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
TEMPERATURE RANGE
0°C to 70°C
0°C to 70°C
–40°C to 85°C
–40°C to 85°C
487fc



Part Number LTC487IN
Description Quad Low Power RS485 Driver
Maker Linear
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LTC487IN Datasheet PDF






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