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LTC491

Features: `Low Power: ICC = 300A 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 P...

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SeekIC No. : 004402624 Detail

LTC491: Features: `Low Power: ICC = 300A 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...

LTC491 Data Sheet

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Part Number:
LTC491
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

`Low Power: ICC = 300A 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
`Pin Compatible with the SN75180


Application

·Low Power RS485/RS422 Transceiver
· Level Translator


Pinout

Connection Diagram


Specifications

Supply Voltage (VCC) .................................................. 12V
Control Input Voltages ...................... 0.5V to VCC +0.5V
Control Input Currents ............................ 50mA to 50mA
Driver Input Voltages ........................ 0.5V to VCC +0.5V
Driver Input Currents ............................. 25mA to 25mA
Driver Output Voltages ........................................... ±14V
Receiver Input Voltages .......................................... ±14V
Receiver Output Voltages ................ 0.5V to VCC +0.5V
Operating Temperature Range
LTC491C.......................................................... 0 to 70
LTC491I.............................................. ....... 40 to 85
Storage Temperature Range .................... 65to 150
Lead Temperature (Soldering, 10 sec.).................... 300



Description

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 of LTC491 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 of LTC491 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 0to 70and 4.75V to 5.25V supply voltage range.




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