Datasheet > 508656X

508656X

更新时间： 2024-11-28 23:21:39

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数据手册

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508656X 数据手册

LTC485

Low Power RS485

Interface Transceiver

DESCRIPTIO

EATURE

■

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 the SN75176A, DS75176A

and µA96176

TheLTC485isalowpowerdifferentialbus/linetransceiver

designedformultipointdatatransmissionstandardRS485

applications with extended common-mode range (12V to

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

TheCMOSdesignofferssignificantpowersavingsoverits

bipolarcounterpartwithoutsacrificingruggednessagainst

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.

O U

PPLICATI

■

Low Power RS485/RS422 Transceiver

Level Translator

■

TYPICAL APPLICATI

Driver Outputs

RO1

RE1

DE1

DI1

CC1

GND1

RO2

RE2

DE2

DI2

CC2

GND2

LTC485 • TA01

LTC485 • TA02

12 3 4 5 6 7...12

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