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1483

Ultra-Low Power RS485 Low EMI Transceiver with Shutdown

Linear Technology 

LTC1483

UU W U

APPLICATIO S I FOR ATIO

Shutdown Mode

Both the receiver output (RO) and the driver outputs (A, B)

can be placed in three-state mode by bringing RE high and

DE low respectively. In addition, the LTC1483 will enter

shutdown mode when RE is high and DE is low.

In shutdown the LTC1483 typically draws only 1µA of

supply current. In order to guarantee that the part goes

into shutdown, RE must be high and DE must be low for

at least 600ns simultaneously. If this time duration is less

than 50ns the part will not enter shutdown mode. Toggling

either RE or DE will wake the LTC1483 back up within

3.5µs.

If the slow slew rate driver was active immediately prior to

shutdown, the supply current will not drop to 1µA until the

driver outputs have reached a steady state; this can take as

long as 2.6µs under worst case conditions. If the driver

was disabled prior to shutdown the supply current will

drop to 1µA immediately.

PACKAGE DESCRIPTION Dimension in inches (millimeters) unless otherwise noted.

0.300 – 0.325

(7.620 – 8.255)

N Package

8-Lead Plastic DIP

0.045 – 0.065

(1.143 – 1.651)

0.130 ± 0.005

(3.302 ± 0.127)

0.009 – 0.015

(0.229 – 0.381)

+0.025

0.325 –0.015

( ) 8.255

+0.635

–0.381

0.065

(1.651)

TYP

0.005

(0.127)

MIN

0.125

(3.175)

MIN

0.255 ± 0.015*

(6.477 ± 0.381)

0.015

(0.380)

MIN

0.100 ± 0.010

(2.540 ± 0.254)

0.018 ± 0.003

(0.457 ± 0.076)

*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.

MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)

0.400*

(10.160)

MAX

8

7

6

5

12

34

N8 0695

S Package

8-Lead Plastic SOIC

0.189 – 0.197*

(4.801 – 5.004)

8

7

6

5

0.010

(0.254

–

–

0.020

0.508)

×

45°

0.008 – 0.010

(0.203 – 0.254)

0.053 – 0.069

(1.346 – 1.752)

0°– 8° TYP

0.004 – 0.010

(0.101 – 0.254) 0.228 – 0.244

(5.791 – 6.197)

0.016 – 0.050

0.406 – 1.270

0.014 – 0.019

(0.355 – 0.483)

*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH

SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE

**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD

FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE

0.050

(1.270)

BSC

1

2

34

0.150 – 0.157**

(3.810 – 3.988)

SO8 0695

RELATED PARTS

PART NUMBER

LTC485

LTC1480

LTC1481

LTC1485

LTC1487

DESCRIPTION

5V Low Power RS485 Interface Transceiver

3.3V Ultra-Low Power RS485 Transceiver

5V Ultra-Low Power RS485 Transceiver with Shutdown

5V Differential Bus Transceiver

5V Ultra-Low Power RS485 with Low EMI Shutdown

and High Input Impendance

COMMENTS

Low Power

World’s First 3V Powered 485 Transceiver with Low Power Consumption

Lowest Power

Highest Speed

High Input Impendance/Low EMI/Lowest Power

8

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7487

(408) 432-1900 q FAX: (408) 434-0507 q TELEX: 499-3977

LT/GP 1094 10K • PRINTED IN THE USA

© LINEAR TECHNOLOGY CORPORATION 1994

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