LTC486CSW#TR Linear Technology, LTC486CSW#TR Datasheet

IC DRIVER RS485 QUAD LP 16SOIC

LTC486CSW#TR

Manufacturer Part Number
LTC486CSW#TR
Description
IC DRIVER RS485 QUAD LP 16SOIC
Manufacturer
Linear Technology
Type
Driverr
Datasheet

Specifications of LTC486CSW#TR

Number Of Drivers/receivers
4/0
Protocol
RS422, RS485
Voltage - Supply
4.75 V ~ 5.25 V
Mounting Type
Surface Mount
Package / Case
16-SOIC (0.300", 7.5mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
APPLICATIONS
TYPICAL APPLICATION
FEATURES
n
n
n
n
n
n
n
n
n
n
n
1/4 LTC486
DI
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
CC
120Ω
= 110μA Typ
4000 FT BELDEN 9841
120Ω
2
1
RECEIVER
DESCRIPTION
The LTC
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 signifi cant power savings over
its bipolar counterpart without sacrifi cing 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 specifi cations 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.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
EN
4
1/4 LTC488
3
®
486 TA01a
486 is a low power differential bus/line driver
RO
Quad Low Power
10k
100
10
1k
10k
* APPLIES FOR 24 GAUGE, POLYETHYLENE
DIELECTRIC TWISTED PAIR
RS485 Length Specifi cation
RS485 Driver
100k
DATA RATE (bps)
LTC486
1M
2.5M
486 TA01b
1
10M
486fb

Related parts for LTC486CSW#TR

LTC486CSW#TR Summary of contents

Page 1

... Both AC and DC specifi cations 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. L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. EN ...

Page 2

... Lead Temperature (Soldering, 10 sec) .................. 300°C ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL LTC486CN#PBF LTC486CN#TRPBF LTC486CSW#PBF LTC486CSW#TRPBF LTC486IN#PBF LTC486IN#TRPBF LTC486ISW#PBF LTC486ISW#TRPBF Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. For more information on lead free part marking, go to: For more information on tape and reel specifi ...

Page 3

DC ELECTRICAL CHARACTERISTICS ±5%, 0°C ≤ Temperature ≤ 70°C (Commercial), –40°C ≤ Temperature ≤ 85°C (Industrial) (Notes SYMBOL PARAMETER V Differential Driver Output Voltage (Unloaded) OD1 V Differential Driver Output Voltage (With Load) OD2 ...

Page 4

LTC486 SWITCHING TIME WAVEFORMS PLH 1 80% – ...

Page 5

TYPICAL PERFORMANCE CHARACTERISTICS TTL Input Threshold vs Temperarue 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 (°C ) FUNCTION TABLE INPUT ENABLES ...

Page 6

LTC486 PIN FUNCTIONS 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 driver outputs enabled will force DO1A ...

Page 7

APPLICATIONS INFORMATION 1/4 LTC486 DX Typical Application A typical connection of the LTC486 is shown in Figure 6. A twisted pair of wires connect drivers and receivers for ...

Page 8

LTC486 APPLICATIONS INFORMATION 10k 1k 100 10 10k 100k 1M DATA RATE (bps) Figure 8. Cable Length vs Data Rate PROBE HERE Rt DX DRIVER Rt = 120Ω 47Ω 470Ω Figure 9. Termination Effects 120Ω RECEIVER ...

Page 9

APPLICATIONS INFORMATION The coupling capacitor allows high frequency energy to fl the termination, but blocks DC and low frequencies. The dividing line between high and low frequency depends on the length of the cable. The coupling capacitor must ...

Page 10

LTC486 PACKAGE DESCRIPTION .300 – .325 (7.620 – 8.255) .008 – .015 (0.203 – 0.381) +.035 .325 –.015 ( ) +0.889 8.255 –0.381 NOTE: INCHES 1. DIMENSIONS ARE MILLIMETERS *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH ...

Page 11

... MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm) 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 representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 12

... FAX: (408) 434-0507 ● RS232 to RS485 Level Translator with Hysteresis R = 220k Y 120Ω DRIVER Z 1/4 LTC486 HYSTERESIS = 10k www.linear.com ● |VY - VZ| 19k ———— —— ≈ 486 TA14 486fb LT 0409 REV B • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 1994 ...

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