参数资料
型号: LTC1481IS8#PBF
厂商: Linear Technology
文件页数: 1/8页
文件大小: 0K
描述: IC TXRX RS485 LOPWR W/SHTDN8SOIC
标准包装: 100
类型: 收发器
驱动器/接收器数: 1/1
规程: RS422,RS485
电源电压: 4.75 V ~ 5.25 V
安装类型: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
供应商设备封装: 8-SOIC
包装: 管件
产品目录页面: 1354 (CN2011-ZH PDF)
1
LTC1481
1481fa
Ultralow Power
RS485 Transceiver
with Shutdown
The LTC
1481 is an ultralow power differential line trans-
ceiver designed for data transmission standard RS485
applications. It will also meet the requirements of RS422.
The CMOS design offers significant power savings over its
bipolar counterparts without sacrificing ruggedness against
overload or ESD damage. Typical quiescent current is only
80
A while operating and less than 1A in shutdown.
The driver and receiver feature three-state outputs, with
the driver outputs maintaining high impedance over the
entire 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 receiver has a fail-safe
feature which guarantees a high output state when the
inputs are left open.
The LTC1481 is fully specified over the commercial and
extended industrial temperature range and is available in
8-pin PDIP and SO packages.
s
Low Power: ICC = 120A Max with Driver Disabled
s
Drivers/Receivers Have
±10kV ESD Protection
s
1
A Quiescent Current in Shutdown Mode
s
High Speed: Up to 2.5Mbits/s Data Rate
s
ICC = 500A Max with Driver Enabled, No Load
s
Single 5V Supply
s
– 7V to 12V Common Mode Range Permits
±7V
Ground Difference Between Devices on the Data Line
s
Thermal Shutdown Protection
s
Power Up/Down Glitch-Free Driver Outputs Permit
Live Insertion or Removal of Transceiver
s
Driver Maintains High Impedance in Three-State
or with the Power Off
s
Up to 32 Transceivers on the Bus
s
30ns Typical Driver Propagation Delays
with 5ns Skew
s
Pin Compatible with the LTC485
s
Battery-Powered RS485/RS422 Applications
s
Low Power RS485/RS422 Transceiver
s
Level Translator
TEMPERATURE (
°C)
–50
SUPPLY
CURRENT
(
A)
50
350
300
250
200
150
100
50
0
1481 TA02
0
–25
25
75
125
175
150
100
DRIVER ENABLED
DRIVER DISABLED
THERMAL SHUTDOWN
WITH DRIVER ENABLED
VCC1
GND1
R
RO1
RE1
DE1
DI1
D
VCC2
GND2
R
RO2
RE2
DE2
DI2
D
Rt
LTC1481 TA01
Supply Current vs Temperature
, LTC and LT are registered trademarks of Linear Technology Corporation.
FEATURES
DESCRIPTIO
U
APPLICATIO S
U
TYPICAL APPLICATIO
U
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