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LTC491 - 典型应用图例：
LTC491典型应用图例一
LTC491 - 封装图解：
LTC491封装图解一
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LINEAR产品 - LTC491介绍

LTC491 - LTC491是Differential Driver and Receiver Pair

LTC491是LINEAR凌力尔特公司的一款RS485 / RS422 收发器产品，LTC491是LTC491是Differential Driver and Receiver Pair，本站介绍了LTC491的封装应用图解、特点和优点、功能等，并给出了与LTC491相关的LINEAR元器件型号供参考。

LTC491 - LTC491是Differential Driver and Receiver Pair - RS485 / RS422 收发器 - 接口器件 - 凌力尔特

LTC491 - Differential Driver and Receiver Pair

LTC491 - Differential Driver and Receiver Pair - Linear Technology（凌力尔特）

功能描述

The LTC491 is a low power differential bus/line transceiver designed for multipoint data transmission standard RS485 applications with extended common mode range (12V to –7V). It also meets the requirements of RS422.

The CMOS design offers significant power savings over its bipolar counterpart without sacrificing ruggedness against overload or ESD damage.

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.

Both AC and DC specifications are guaranteed from 0°C to 70°C and 4.75V to 5.25V supply voltage range.

特点
  • Low Power: ICC = 300µA Typical
  • Designed for RS485 or RS422 Applications
  • Single 5V Supply
  • -7V to 12V Bus Common Mode Range Permits ±7V Ground Difference Between Devices on the Bus
  • Thermal Shutdown Protection
  • Power-Up/Down Glitch-Free Driver Outputs Permit Live Insertion or Removal of Package
  • Driver Maintains High Impedance in Three-State or with the Power Off
  • Combined Impedance of a Driver Output and Receiver Allows up to 32 Transceivers on the Bus
  • 70mV Typical Input Hysteresis
  • 28ns Typical Driver Propagation Delays with 5ns Skew for 2.5MB Operation
  • Pin Compatible with the SN75180
  • Available in 14-Lead PDIP and SO Packages
    • 应用
  • 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)
    LTC491CN N-14 C $3.25 $2.65
    LTC491CN#PBF N-14 C $3.25 $2.65
    LTC491CS SO-14 C $3.92 $3.20
    LTC491CS#PBF SO-14 C $3.92 $3.20
    LTC491CS#TR SO-14 C $3.26
    LTC491CS#TRPBF SO-14 C $3.26
    LTC491IN N-14 I $4.00 $3.30
    LTC491IN#PBF N-14 I $4.00 $3.30
    LTC491IS SO-14 I $4.75 $3.90
    LTC491IS#PBF SO-14 I $4.75 $3.90
    LTC491IS#TR SO-14 I $3.96
    LTC491IS#TRPBF SO-14 I $3.96
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  • LT3080 - 可调 1.1A、单电阻、低压差稳压器
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  • LT1763 - 500mA、低噪声、LDO 微功率稳压器
  • LT4320 / LT4320-1 - 理想二极管桥控制器
  • LT1963A - 1.5A、低噪声、快速瞬态响应 LDO 稳压器
  • LTC4366 - 高电压浪涌抑制器
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