LTC491

更新时间： 2024-11-05 22:51:47

品牌	Logo	应用领域
凌特 - Linear		驱动器
页数	文件大小	规格书
12页	238K
描述
Differential Driver and Receiver Pair

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LTC491 数据手册

LTC491

Differential Driver and

Receiver Pair

DESCRIPTIO

EATURE

■

Low Power: I_CC= 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

TheLTC491isalowpowerdifferentialbus/linetransceiver

designedformultipointdatatransmissionstandardRS485

applications with extended common mode range (+12V to

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

TheCMOSdesignofferssignificantpowersavingsoverits

bipolarcounterpartwithoutsacrificingruggednessagainst

overload or ESD damage.

■

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

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.

■

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

■

Thereceiverhasafailsafefeaturewhichguaranteesahigh

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.

O U

PPLICATI

■

Low Power RS485/RS422 Transceiver

Level Translator

■

TYPICAL APPLICATI

120Ω

RECEIVER

DRIVER

4000 FT 24 GAUGE TWISTED PAIR

LTC491

DRIVER

120Ω

RECEIVER

REB

LTC491 • TA01

12 3 4 5 6 7...12

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