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Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 50-668-707 • www.exar.com

SP485R_00_072309

ABSOLUTE MAXIMUM RATINGS

These are stress ratings only and functional operation

of the device at these ratings or any other above those

indicated in the operation sections of the specifications

below is not implied. Exposure to absolute maximum

rating conditions for extended periods of time may

affect reliability.

V

Storage Temperature.......................-65˚C to +150˚C

ELECTRICAL CHARACTERISTICS

Typically 25ºC @ V

PARAMETERS

MIN.

TYP.

MAX.

UNITS CONDITIONS

LOGIC INPUTS

V

IL

0.8

Volts

V

IH

2.0

Volts

LOGIC OUTPUTS

V

OL

0.4

Volts

I

V

OH

2.4

Volts

I

RS-485 DRIVER DC Characteristics

Open Circuit Voltage

6.0

Volts

Differential Output Voltage

.5

5.0

Volts

R

Balance

+/-0.2

Volts

|V

Common-Mode Output

3.0

Volts

Output Current

28.0

mA

R

Short Circuit Current

+/-250

mA

Terminated in -7V to +2V

RS-485 DRIVER AC Characteristics

Maximum Data Rate

5

Mbps

R

Output Transition Time

30

ns

Rise/fall time, 0% to 90%

Propagation Delay, t

PLH

60

00

ns

See Figures 4 & 6, R

C

Propagation Delay, t

PHL

60

00

ns

See Figures 4 & 6, R

C

Driver Output Skew

5

5

ns

see Figures 4 and 6,

t

RS-485 RECEIVER DC Characteristics

Output Voltage Low, V

OL

0.4

Volts

Output Voltage High, V

OH

2.4

Volts

Tri-State Output Current

+/-

µA

0.4V ≤ V

Power Dissipation

8-pin NSOIC.................................................000mW

(Ø

8-pin PDIP....................................................000mW

(Ø