LTC486| Datasheet

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LTC486 Quad Low Power RS485 Driver FEATURES

DESCRIPTIO

Very Low Power: ICC = 110uA Typ Designed for RS485 or RS422 Applications Single 5V Supply 7V to 12V Bus Common-Mode Range Permits 7V GND Difference Between Devices on the Bus Thermal Shutdown Protection Power-Up/Down Glitch-Free Driver Outputs Permit Live Insertion/Removal of Package Driver Maintains High Impedance in Three-State or with the Power Off 28ns Typical Driver Propagation Delays with 5ns Skew Pin Compatible with the SN75172, DS96172, uA96172, and DS96F172

The LTC486 is a low power differential bus/line driver designed for multipoint data transmission standard RS485 applications with extended common-mode range (12V to 7V). It also meets RS422 requirements. The CMOS design offers significant power savings over its bipolar counterpart without sacrificing ruggedness against overload or ESD damage. The driver features 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. Both AC and DC specifications are guaranteed from 0 C to 70 C (Commercial), 40 C to 85 C (Industrial), over the 4.75V to 5.25V supply voltage range.

APPLICATI

S

Low Power RS485/RS422 Drivers Level Translator

TYPICAL APPLICATI

CABLE LENGTH (FT)

EN

EN

4 DI 1 DRIVER 12 1/4 LTC486 EN 120 4000 FT BELDEN 9841 120

2

4 RECEIVER 3 RO

1

1/4 LTC488

LTC486 TA01

U
RS485 Cable Length Specification*
10k 1k 100 10 10k 100k 1M 2.5M 10M DATA RATE (bps)
LTC486 TA09

UO

UO

* APPLIES FOR 24 GAUGE, POLYETHYLENE DIELECTRIC TWISTED PAIR

1

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LTC486 DATASHEET