LT1483 Linear Technology, LT1483 Datasheet - Page 8

• Manufacturer Part Number: LT1483
• Description: Ultra-Low Power RS485 Low EMI Transceiver with Shutdown
• Manufacturer: Linear Technology

APPLICATIO S I FOR ATIO
RELATED PARTS
LTC1483
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 1 A 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
PACKAGE
PART NUMBER
LTC485
LTC1480
LTC1481
LTC1485
LTC1487
8
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7487
[phone]
(0.203 – 0.254)
**
0.008 – 0.010
*
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
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
(0.254 – 0.508)
0.010 – 0.020
DESCRIPTION
U U
FAX
0.016 – 0.050
0.406 – 1.270
: [phone]
(7.620 – 8.255)
(0.229 – 0.381)
0.300 – 0.325
0.009 – 0.015
0.325
8.255
45
+0.635
–0.381
+0.025
–0.015
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
0 – 8 TYP
TELEX
(1.651)
0.065
W
TYP
U
: 499-3977
(1.346 – 1.752)
0.053 – 0.069
(2.540
(0.127)
0.100
0.005
MIN
(0.355 – 0.483)
0.014 – 0.019
Dimension in inches (millimeters) unless otherwise noted.
0.010
0.254)
(1.143 – 1.651)
0.045 – 0.065
U
8-Lead Plastic SOIC
8-Lead Plastic DIP
N Package
S Package
(0.457
0.018
(1.270)
0.050
than 50ns the part will not enter shutdown mode. Toggling
either RE or DE will wake the LTC1483 back up within
3.5 s.
If the slow slew rate driver was active immediately prior to
shutdown, the supply current will not drop to 1 A until the
driver outputs have reached a steady state; this can take as
long as 2.6 s under worst case conditions. If the driver
was disabled prior to shutdown the supply current will
drop to 1 A immediately.
BSC
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
(3.302
0.130
(0.101 – 0.254)
(3.175)
0.003
0.076)
0.004 – 0.010
0.125
MIN
0.005
0.127)
(0.380)
0.015
MIN
(5.791 – 6.197)
0.228 – 0.244
(6.477
0.255
0.015*
0.381)
8
1
8
1
(4.801 – 5.004)
0.189 – 0.197*
7
2
2
(10.160)
7
0.400*
MAX
LINEAR TECHNOLOGY CORPORATION 1994
6
3
6
3
LT/GP 1094 10K • PRINTED IN THE USA
5
4
4
5
N8 0695
(3.810 – 3.988)
0.150 – 0.157**
SO8 0695