LTC485 - Low Power RS485 Interface Transceiver

Features

  • Low Power: ICC = 300μA Typ
  • Designed for RS485 Interface 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 Transceiver
  • 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 (C- and I-Grades)
  • 70mV Typical Input Hysteresis
  • 30ns Typical Driver Propagation Delays with 5ns Skew for Up to 2.5MB Operation
  • Pin Compatible with ±60V Protected LTC2862

Typical Application

LTC485 Typical Application
LTC485 Typical Application

Description

The LTC®485 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.

The LTC485 is fully specified over the commercial and extended industrial temperature range.

Packaging

For complete and up to date package information and drawings, please refer to our packaging page

SO-8, N-8, CERDIP-8

LTC485 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LTC485CN8 PDIP 8 C $1.65 $1.30 View
LTC485CN8#PBF PDIP 8 C $1.65 $1.30 View
LTC485CS8 SO 8 C $2.10 $1.65 View
LTC485CS8#PBF SO 8 C $2.10 $1.65 View
LTC485CS8#TR SO 8 C $1.71 View
LTC485CS8#TRPBF SO 8 C $1.71 View
LTC485IN8 PDIP 8 I $2.25 $1.80 View
LTC485IN8#PBF PDIP 8 I $2.25 $1.80 View
LTC485IS8 SO 8 I $2.75 $2.25 View
LTC485IS8#PBF SO 8 I $2.75 $2.25 View
LTC485IS8#TR SO 8 I $2.31 View
LTC485IS8#TRPBF SO 8 I $2.31 View
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Click here to view our complete list of demo boards

Applications

  • Low Power RS485/RS422 Transceiver
  • Level Translator

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