2

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

SP483E_00_02092

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

Input Voltages

Logic.........................-0.3V to (Vcc + 0.5V)

Drivers......................-0.3V to (Vcc + 0.5V)

Receivers.........................................+/-15V

ELECTRICAL CHARACTERISTICS

T

PARAMETERS

MIN.

TYP.

MAX.

UNITS CONDITIONS

SP483E DRIVER

DC Characteristics

Differential Output Voltage

GND

Vcc

Volts

Unloaded; R = ∞ ; See Figure 1

Differential Output Voltage

2

Vcc

Volts

With Load; R = 50Ω (RS-422);

See Figure 1

Differential Output Voltage

.5

Vcc

Volts

With Load; R = 27Ω (RS-485);

See Figure 1

Change in Magnitude of Driver

Differential Output Voltage for

Complimentary states

0.2

Volts

R = 27Ω or R = 50Ω; See Figure 1

Driver Common Mode Output

Voltage

3

Volts

R = 27Ω or R = 50Ω; See Figure 1

Input High Voltage

2.0

Volts

Applies to DE, DI, RE

Input Low Voltage

0.8

Volts

Applies to DE, DI, RE

Input Current, Driver Input

0

µA

Applies to DI

Input Current, Control Lines



µA

Applies to DE, RE

Driver Short Circuit Current

V

+/-250

mA

-7V ≤ V

V

+/-250

mA

-7V ≤ V

SP483E DRIVER

AC Characteristics

Max. Transmission Rate

250

kbps

RE = 5V, DE = 5V; R

C

Driver Input to Output, t

PLH

250

800

2000

ns

See Figures 3 & 5, R

C

Driver Input to Output, t

PHL

250

800

2000

ns

See Figures 3 & 5, R

C

Driver Skew

00

800

ns

See Figures 3 and 5,

t

Driver Rise or Fall Time

250

2000

ns

From 0%-90%; R

C

See Figures 3 and 6

Output Voltages

Logic.........................-0.3V to (Vcc + 0.5V)

Drivers.............................................+/-15V

Receivers..................-0.3V to (Vcc + 0.5V)

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

Power Dissipation..........................................500mW