LTC1487是Ultra-Low Power RS485 with Low EMI, Shutdown and High Input Impedance

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LTC1487 - LTC1487是Ultra-Low Power RS485 with Low EMI, Shutdown and High Input Impedance

LTC1487是Linear公司的一款RS485 / RS422 收发器产品，LTC1487是Ultra-Low Power RS485 with Low EMI, Shutdown and High Input Impedance，本站介绍了LTC1487的封装应用图解、特点和优点、功能等，并给出了与LTC1487相关的凌力尔特元器件型号供参考。

LTC1487 - Ultra-Low Power RS485 with Low EMI, Shutdown and High Input Impedance

LTC1487 - Ultra-Low Power RS485 with Low EMI, Shutdown and High Input Impedance - Linear Technology（凌力尔特）

功能描述

The LTC?1487 is an ultra-low power differential line transceiver designed with high impedance inputs allowing up to 256 transceivers to share a single bus. It meets the requirements of RS485 and RS422. The LTC1487 features output drivers with controlled slew rate, decreasing the EMI radiated from the RS485 lines, and improving signal fidelity with misterminated lines. The CMOS design offers significant power savings without sacrificing ruggedness against overload or ESD damage. Typical quiescent current is only 80μA while operating and 1μA 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 iputs are left open. I/O pins are protected against multiple ESD strikes of over ±10kV using the Human Body Model.The LTC1487 is fully specified over the commercial temperature range and is available in 8-pin DIP and SO packages.

特点

High Input Impedance: Up to 256 Transceivers on the Bus

Low Power: ICC = 120µA Max with Driver Disabled

ICC = 200µA Max with Driver Enabled, No Load

1µA Quiescent Current in Shutdown Mode

Controlled Slew Rate Driver for Reduced EMI

Single 5V Supply

ESD Protection to ±10kV On Receiver Inputs and Driver outputs

-7V to 12V Common-Mode Range Permits ±7V Ground Difference Between Devices on the Data Line

Thermal Shutdown Protection

Power Up/Down Glitch-Free Driver Outputs Permit Live Insertion or Removal of Transceiver

Driver Maintains High Impedance in Three-State or with the Power Off

Pin Compatible with the LTC485

应用

Battery-Powered RS485/RS422 Applications

Low Power RS485/RS422 Transceiver

Level Translator

以下列出了不同封装及包装形式的具体型号,并标出了直接在linear官网上订货的价格（美元）

器件型号	封装	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量)
LTC1487CN8	N-8	C	$1.85	$1.45
LTC1487CN8#PBF	N-8	C	$1.85	$1.45
LTC1487CS8	SO-8	C	$2.25	$1.80
LTC1487CS8#PBF	SO-8	C	$2.25	$1.80
LTC1487CS8#TR	SO-8	C		$1.86
LTC1487CS8#TRPBF	SO-8	C		$1.86