FEATURES TYPICAL APPLICATION

■ Low Power: I_CC = 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

■ 70mV Typical Input Hysteresis

■ 30ns Typical Driver Propagation Delays

with 5ns Skew

■ Pin Compatible with ±60V Protected LT1785 and

52Mbps LTC1685

APPLICATIONS

■ Low Power RS485/RS422 Transceiver

■ Level Translator

DESCRIPTION

The LTC® 485 is a low power differential bus/line trans-

ceiver designed for multipoint data transmission standard

RS485 applications with extended common mode range

(12V to –7V). It also meets the requirements of RS422.

PACKAGE/ORDER INFORMATION

The CMOS design offers significant power savings over its

bipolar counterpart without sacrificing ruggedness against

overload of 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.

           King--- Originator of ANTERWELL, engaged in the IC electronics industry in 1998 and establish ANTERWELL in 2004. The company is located in Shenzhen Huaqiang North, the largest electronic center in Asia. Our main business is the technical development and electronic products import and export business. Currently, we have branches in Hong Kong and Malaysia.

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