1

LTC486

Quad Low Power

RS485 Driver

DESCRIPTIO

APPLICATI

TYPICAL

DATA RATE (bps)

10k

10

100

1k

10k

100k

1M

10M

LTC486 • TA09

2.5M

* APPLIES FOR 24 GAUGE, POLYETHYLENE

DIELECTRIC TWISTED PAIR

RS485 Cable Length Specification*

s

Low Power RS485/RS422 Drivers

s

Level Translator

S

APPLICATI

S

FEATURE

s

s

Designed for RS485 or RS422 Applications

s

Single 5V Supply

s

– 7V to 12V Bus Common-Mode Range Permits

±7V GND Difference Between Devices on the Bus

s

Thermal Shutdown Protection

s

Power-Up/Down Glitch-Free Driver Outputs Permit

Live Insertion/Removal of Package

s

Driver Maintains High Impedance in Three-State or

with the Power Off

s

28ns Typical Driver Propagation Delays

with 5ns Skew

s

Pin Compatible with the SN75172, DS96172,

µA96172, 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.

LTC486 • TA01

RECEIVER

EN

DI

EN

44

12

1

1/4 LTC486

120

Ω

120

Ω

RO

3

EN

2

1

1/4 LTC488

4000 FT BELDEN 9841

DRIVER