LTC486CS Linear Technology Corporation, LTC486CS Datasheet

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LTC486CS

Manufacturer Part Number
LTC486CS
Description
Manufacturer
Linear Technology Corporation
Datasheet
FEATURE
A
TYPICAL
1/4 LTC486
DI
PPLICATI
Very Low Power: I
Designed for RS485 or RS422 Applications
Single 5V Supply
– 7V to 12V Bus Common-Mode Range Permits
± 7V GND Difference Between Devices on the Bus
Thermal Shutdown Protection
Power-Up/Down Glitch-Free Driver Outputs Permit
Live Insertion/Removal of Package
Driver Maintains High Impedance in Three-State or
with the Power Off
28ns Typical Driver Propagation Delays
with 5ns Skew
Pin Compatible with the SN75172, DS96172,
µA96172, and DS96F172
Low Power RS485/RS422 Drivers
Level Translator
1
DRIVER
EN
EN
12
4
A
S
PPLICATI
O
U
CC
120Ω
S
= 110µA Typ
4000 FT BELDEN 9841
O
U
120Ω
2
1
RECEIVER
EN
D
The LTC486 is a low power differential bus/line driver
designed for multipoint data transmission standard RS485
applications with extended common-mode range (12V to
–7V). 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
common-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), over the
4.75V to 5.25V supply voltage range.
4
1/4 LTC488
ESCRIPTIO
LTC486 • TA01
3
RO
Quad Low Power
U
100
10k
1k
10
10k
RS485 Cable Length Specification*
* APPLIES FOR 24 GAUGE, POLYETHYLENE
DIELECTRIC TWISTED PAIR
RS485 Driver
100k
DATA RATE (bps)
1M
LTC486
2.5M
LTC486 • TA09
10M
1

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LTC486CS Summary of contents

Page 1

FEATURE S ■ Very Low Power 110µA Typ CC ■ Designed for RS485 or RS422 Applications ■ Single 5V Supply – 12V Bus Common-Mode Range Permits ■ ± 7V GND Difference Between Devices on the Bus ...

Page 2

... DIFF L1 L2 (Figures 100pF (Figures Closed ORDER PART TOP VIEW NUMBER DI4 LTC486CN 14 DO4A LTC486CSW 13 DO4B LTC486IN 12 EN LTC486ISW 11 DO3B 10 DO3A 9 DI3 S PACKAGE 16-LEAD PLASTIC SOL = 125°C, θ = 70°C/W ( 150°C, θ = 95°C/W (S) JA ...

Page 3

U S WITCHI G C HARA TERISTICS ± ± ± ± ± 5%, 0°C ≤ ≤ ≤ ≤ ≤ Temperature ≤ ≤ ≤ ≤ ≤ 70°C (Commercial), – 40°C ≤ ≤ ≤ ≤ ≤ Temperature ≤ ≤ ...

Page 4

LTC486 W U TYPICAL PERFOR A TTL Input Threshold vs Temperature 1.63 1.61 1.59 1.57 1.55 –50 0 TEMPERATURE (°C ) Supply Current vs Temperature 130 120 110 100 90 –50 0 TEMPERATURE (° ...

Page 5

DI1 (Pin 1): Driver 1 Input. If Driver 1 is enabled, then a low on DI1 forces the driver outputs DO1A low and DO1B high. A high on DI1 with the ...

Page 6

LTC486 FOR ATIO A PPLICATI 1/4 LTC486 DX Losses in a transmission line are a complex combination of DC conductor loss, AC losses (skin effect), leakage, ...

Page 7

... Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 8

... NOTE 1 0.004 – 0.012 (0.102 – 0.305 sn486 486fas LT/GP 0294 5K REV A • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 1994 0.394 – 0.419 (10.007 – 10.643) ...

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