LTC487CSW Linear Technology, LTC487CSW Datasheet

IC DVR RS485 LOW PWR QUAD 16SOIC

LTC487CSW

Manufacturer Part Number
LTC487CSW
Description
IC DVR RS485 LOW PWR QUAD 16SOIC
Manufacturer
Linear Technology
Type
Driverr
Datasheet

Specifications of LTC487CSW

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
Other names
LTC487CS

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LTC487CSW
Manufacturer:
LT
Quantity:
170
Part Number:
LTC487CSW
Manufacturer:
LINEAR
Quantity:
20 000
Part Number:
LTC487CSW#PBF
Manufacturer:
Maxim
Quantity:
150
Part Number:
LTC487CSW#PBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Part Number:
LTC487CSW#TRPBF
Manufacturer:
LTNEAR
Quantity:
20 000
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applicaTions
n
n
Typical applicaTion
FeaTures
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 SN75174, DS96174,
µA96174, and DS96F174
Low Power RS485/RS422 Drivers
Level Translator
1
1/4 LTC487
DRIVER
EN 12
4
2
3
120
CC
= 110µA Typ
4000 FT BELDEN 9841
120
2
1
RECEIVER
EN 12
4
1/4 LTC489
DescripTion
The LTC
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.
3
LTC487 TA01
RO
®
487 is a low power differential bus/line driver
10k
100
1k
10
10k
Quad Low Power
RS485 Cable Length Specification*
* APPLIES FOR 24 GAUGE, POLYETHYLENE
DIELECTRIC TWISTED PAIR
100k
DATA RATE (bps)
RS485 Driver
1M
LTC487
2.5M
LTC487 TA09
10M

487fc

Related parts for LTC487CSW

LTC487CSW Summary of contents

Page 1

... 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. 10k ...

Page 2

... For more information on tape and reel specifications, go to:  pin conFiguraTion + 0. 0.5V CC 16-LEAD PLASTIC DIP Consult factory for Military grade parts. PART MARKING PACKAGE DESCRIPTION LTC487CN 16-Lead Plastic DIP LTC487CSW 16-Lead Plastic SO LTC487IN 16-Lead Plastic DIP LTC487ISW 16-Lead Plastic SO http://www.linear.com/leadfree/ http://www.linear.com/tapeandreel/ TOP VIEW DI1 ...

Page 3

Dc elecTrical characTerisTics (Industrial) (Notes 2, 3) SYMBOL PARAMETER V Differential Driver Output Voltage (Unloaded) OD1 V Differential Driver Output Voltage (With Load) OD2 V Change in Magnitude of Driver Differential OD Output Voltage for Complementary Output States V Driver ...

Page 4

LTC487 Typical perForMance characTerisTics Driver Output High Voltage vs Output Current T = 25°C A –96 –72 – 48 – OUTPUT VOLTAGE (V) TTL Input Threshold vs Temperature 1.63 1.61 1.59 1.57 1.55 –50 ...

Page 5

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 high ...

Page 6

LTC487 TesT circuiT LTC487 TA02 Figure 3. Driver DC Test Load applicaTions inForMaTion Typical Application A typical connection of the LTC487 is shown in Figure 6. A twisted pair of wires connect ...

Page 7

Losses in a transmission line are a complex combination of DC conductor loss, AC losses (skin effect), leakage, and AC losses in the dielectric. In good polyethylene cables such as the Belden 9841, the conductor losses and dielectric ...

Page 8

LTC487 applicaTions inForMaTion AC Cable Termination Cable termination resistors are necessary to prevent un- wanted reflections, but they consume power. The typical differential output voltage of the driver is 2V when the cable is terminated with two 120Ω resistors, causing ...

Page 9

A TransZorb is a silicon transient voltage suppressor that has exceptional surge handling capabilities, fast response time, and low series resistance. They are available from General Semiconductor Industries and come in a variety of breakdown voltages and prices. ...

Page 10

LTC487 package DescripTion .030 ±.005 TYP N .420 MIN RECOMMENDED SOLDER PAD LAYOUT .291 – .299 (7.391 – 7.595) NOTE 4 .010 – .029 × 45° (0.254 – 0.737) .005 (0.127) RAD MIN .009 – .013 NOTE ...

Page 11

... DESCRIPTION C 8/10 Reversed temperature ranges for LTC487CSW#PBF and LTC487IN#PBF . 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 Y 120 DRIVER Z HYSTERESIS = 10k • 1/4 LTC487 www.linear.com ● 19k ———— ———— ≈ LTC487 TA14 487fc LT 0810 REV C • PRINTED IN USA  LINEAR TECHNOLOGY CORPORATION 1994 ...

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