LTC1482 Low Power RS485 Transceiver with Carrier Detect and Receiver Fail-Safe
The LTC®1482 is a low power RS485 compatible transceiver 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 withstand ±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 700µA and 900µA when the driver is disabled and enabled respectively. In shutdown, the quiescent current of the LTC1482 drops to a maximum of 20µA. When the driver is disabled or the LTC1482 is in shutdown, 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
产品特点 Features
- No Damage or Latchup to ±15kV (Human Body
Model), IEC1000-4-2 Level 4 (±8kV) Contact and
Level 3 (±8kV)
- 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: ICC = 700µA Max with Driver Disabled
- ICC = 900µA Max in Driver Mode Without Load
- 20µA 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
|
应用
- Battery-Powered RS485/RS422 Applications
- Low Power RS485/RS422 Transceiver
- Level Translator
典型应用图
参数
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LTC1482 订购信息和价格参考Package Variations and Pricing
| 器件型号 |
封装 |
引脚 |
温度 |
价格 (以 1 ~ 99 片为批量) |
价格 (以 1000 片为批量) * |
| LTC1482CMS8 |
MSOP |
8 |
C |
$3.25 |
$2.30 |
| LTC1482CMS8#PBF |
MSOP |
8 |
C |
$3.25 |
$2.30 |
| LTC1482CMS8#TR |
MSOP |
8 |
C |
|
$2.36 |
| LTC1482CMS8#TRPBF |
MSOP |
8 |
C |
|
$2.36 |
| LTC1482CN8 |
PDIP |
8 |
C |
$2.65 |
$1.95 |
| LTC1482CN8#PBF |
PDIP |
8 |
C |
$2.65 |
$1.95 |
| LTC1482CS8 |
SO |
8 |
C |
$2.75 |
$2.00 |
| LTC1482CS8#PBF |
SO |
8 |
C |
$2.75 |
$2.00 |
| LTC1482CS8#TR |
SO |
8 |
C |
|
$2.06 |
| LTC1482CS8#TRPBF |
SO |
8 |
C |
|
$2.06 |
| LTC1482IN8 |
PDIP |
8 |
I |
$3.50 |
$2.55 |
| LTC1482IN8#PBF |
PDIP |
8 |
I |
$3.50 |
$2.55 |
| LTC1482IS8 |
SO |
8 |
I |
$3.65 |
$2.70 |
| LTC1482IS8#PBF |
SO |
8 |
I |
$3.65 |
$2.70 |
| LTC1482IS8#TR |
SO |
8 |
I |
|
$2.76 |
| LTC1482IS8#TRPBF |
SO |
8 |
I |
|
$2.76 |
LTC1482 数据手册及相关资料下载
- 数据手册 (英文) : LTC1482 - Low Power RS485 Transceiver with Carrier Detect and Receiver Fail-Safe.PDF
- 设计要点 (英文) : DN102 - RS485 Transceivers Reduce Power and EMI.PDF
- 可靠性数据 : R397 Reliability Data .PDF
- 产品选型卡 : Ultra Rugged ±60V RS485 Transceivers.PDF
- 产品选型卡 : RS485 Quick Guide.PDF
