LTC1482CMS8 Linear Technology, LTC1482CMS8 Datasheet

IC TXRX RS485 LOWPWR 8-MSOP

LTC1482CMS8

Manufacturer Part Number
LTC1482CMS8
Description
IC TXRX RS485 LOWPWR 8-MSOP
Manufacturer
Linear Technology
Type
Transceiverr
Datasheet

Specifications of LTC1482CMS8

Number Of Drivers/receivers
1/1
Protocol
RS422, RS485
Voltage - Supply
4.75 V ~ 5.25 V
Mounting Type
Surface Mount
Package / Case
8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LTC1482CMS8
Manufacturer:
LT
Quantity:
10 000
Part Number:
LTC1482CMS8
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Part Number:
LTC1482CMS8#PBF
Manufacturer:
Linear Technology
Quantity:
135
Part Number:
LTC1482CMS8#PBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Part Number:
LTC1482CMS8#TRPBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
FEATURES
APPLICATIO S
TYPICAL APPLICATIO
, LTC and LT are registered trademarks of Linear Technology Corporation.
No Damage or Latchup to 15kV (Human Body
Model), IEC1000-4-2 Level 4 ( 8kV) Contact and
Level 3 ( 8kV) Air Discharge
Active Low Carrier Detect Output
Guaranteed High Receiver Output State for
Floating, Shorted or Terminated Inputs with
No Signal Present
Drives Low Cost Residential Telephone Wires
Low Power: I
I
20 A Max Quiescent Current in Shutdown Mode
Single 5V Supply
– 7V to 12V Common Mode Range Permits 7V
Ground Difference Between Devices on the Data Line
Maximum Data Rate of 4Mbps
Power Up/Down Glitch-Free Driver Outputs
Up to 32 Transceivers on the Bus
Available in 8-Lead MSOP, PDIP and SO Packages
Battery-Powered RS485/RS422 Applications
Low Power RS485/RS422 Transceiver
Level Translator
CC
DI1/SHDN1
= 900 A Max in Driver Mode Without Load
RO1
CD1
DE1
CC
LTC1482
= 700 A Max with Driver Disabled
D
U
R
B1
A1
RS485 Interface
V
GND1
CC1
120
U
GND2
V
120
CC2
B2
A2
LTC1482
R
D
1482 TA01
RO2
CD2
DE2
DI2/SHDN2
DESCRIPTIO
The LTC
ceiver that offers an active low carrier detect output. The
open-drain carrier detect pin allows several transceivers
to share the same carrier detect line and can be used to
detect the insertion or removal of a driven RS485/RS422
cable.
Enhanced ESD protection allows the LTC1482 to with-
stand 15kV (human body model), IEC-1000-4-2 level 4
( 8kV) contact and level 3 ( 8kV) air discharge ESD
without latchup or damage.
The LTC1482 receiver stays alive at all times except in
shutdown. The supply current is a maximum of 700 A
and 900 A when the driver is disabled and enabled
respectively. In shutdown, the quiescent current of the
LTC1482 drops to a maximum of 20 A.
When the driver is disabled or the LTC1482 is in shut-
down, the driver outputs are three-stated and remain in
a high impedance state over the RS485 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.
The LTC1482 is fully specified over the commercial and
industrial temperature ranges and is available in 8-lead
MSOP, PDIP and SO packages.
Low Power RS485 Transceiver
®
1482 is a low power RS485 compatible trans-
with Carrier Detect and
Carrier Detect Output (2000 Foot STP Cable)
CD2
DE1
A2
B2
DE1
DE2 = 0
1k PULL-UP AT CD
U
Receiver Fail-Safe
Dl1 = V
Dl2 = V
CC
CC
LTC1482
1482 TA01a
1

Related parts for LTC1482CMS8

LTC1482CMS8 Summary of contents

Page 1

... Maximum Data Rate of 4Mbps Power Up/Down Glitch-Free Driver Outputs Transceivers on the Bus Available in 8-Lead MSOP, PDIP and SO Packages U APPLICATIO S Battery-Powered RS485/RS422 Applications Low Power RS485/RS422 Transceiver Level Translator , LTC and LT are registered trademarks of Linear Technology Corporation. U TYPICAL APPLICATIO RS485 Interface LTC1482 RO1 V CC1 B1 ...

Page 2

... Junction Temperature .......................................... 125 C + 0.3V) Operating Temperature Range CC LTC1482C ........................................ 0.3V) LTC1482I ...................................... – Storage Temperature Range .................. – 150 C Lead Temperature (Soldering, 10 sec)................... 300 C + 0.3V ORDER PART NUMBER RO 1 LTC1482CMS8 DI/SHDN 4 MS8 PART MARKING N8 PACKAGE 8-LEAD PDIP LTCB T = 125 C, JMAX T = 125 C, JMAX The denotes the specifications which apply over the full operating = 25 C ...

Page 3

ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are at T SYMBOL PARAMETER V Differential Input Threshold Voltage for THCD V Receiver Input Hysteresis Output High Voltage OH RO Output High Voltage V RO and CD ...

Page 4

LTC1482 U SWITCHING CHARACTERISTICS temperature range, otherwise specifications are at T SYMBOL PARAMETER t Receiver Input to CD Output High at Shutdown CDH(SHDN) t Receiver Input to CD Output Low from Shutdown CDL(SHDN) t Receiver Enable from Shutdown to Output ...

Page 5

W U TYPICAL PERFOR A CE CHARACTERISTICS Receiver Input Offset Voltage vs Temperature –20 –40 –60 – 12V CM –100 –120 –140 V = –7V CM –160 –180 –200 ...

Page 6

LTC1482 W U TYPICAL PERFOR A CE CHARACTERISTICS Receiver Output High Voltage vs Temperature 4 4.75V CC 4 8mA 4.4 4.2 4.0 3.8 3.6 3.4 3.2 3.0 –55 –35 – 105 ...

Page 7

W U TYPICAL PERFOR A CE CHARACTERISTICS Driver Differential Output Voltage vs Temperature 3 2.5 2 5.25V 1 4.75V 4.5V 1.0 CC 0.5 V ...

Page 8

LTC1482 W U TYPICAL PERFOR A CE CHARACTERISTICS Driver Output High Voltage vs Output Current 5 4.75V CC 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 –100 –90 –80 –70 –60 –50 –40 –30 –20 –10 ...

Page 9

PIN FUNCTIONS ( DI/SHDN = disable the driver while keeping the receiver alive ( DI/SHDN = 1). When the driver is enabled (DE = 1), DI/SHDN = 0 forces the ...

Page 10

LTC1482 U W SWITCHI WAVEFOR S 3V DI/SHDN 1. PLH t DSKEW V O 90% 10% 50% – 1/2 V SKEW O NOTE ...

Page 11

U W SWITCHI WAVEFOR S V OD2 A – – V OD2 NOTE: 1k PULL- 1. OD2 A – ...

Page 12

LTC1482 U U APPLICATIONS INFORMATION Carrier Detect Operation The carrier detect or CD pin is an open-drain output with a weak internal pull-up (30 A typical). This allows several LTC1482s to share the same carrier detect line. The internal pull-up ...

Page 13

U U APPLICATIONS INFORMATION The supply current does not drop below 20 A immedi- ately. DE and DI/SHDN must be low for a least 600ns simultaneously for I to drop to half its operating value CC (driver outputs unloaded) and ...

Page 14

LTC1482 PACKAGE DESCRIPTION 0.007 0 – 6 TYP (0.18) 0.021 0.006 (0.53 0.015) * DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE ** DIMENSION DOES ...

Page 15

... FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE 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 represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 16

... Highest Input Impedance, Low EMI, Lowest Power 2500V Propagation Delay Skew 500ps (Typ) Low Power, 15kV ESD Protection “A” “B” 1482 TA02 Isolation RMS 15kV ESD Protection, Industry Standard Pinout 1482f LT/TP 0400 4K • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1998 ...

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