2

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

SP332_00_0260

SPECIFICATIONS

PARAMETER

MIN.

TYP.

MAX.

UNITS CONDITIONS

RS-485 DRIVER

DC Characteristics

Differential Output Voltage

GND

Vcc

Volts

Unloaded; R = ∞; See Figure 1

Differential Output Voltage

2.0

5.0

Volts

With load; R = 50Ω (RS-422); See

Figure 1

Differential Output Voltage

.5

5.0

Volts

With load; R = 27Ω (RS-485); See

Figure 1

Change in Magnitude of Driver

Differential Output Voltage for

Complementary 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 transmitter inputs, SEL A,

SEL B, SD and LB

Input Low Voltage

0.8

Volts

Applies to transmitter inputs, SEL A,

SEL B, SD and LB

Input Current

+/-0

µA

Applies to transmitter inputs, SEL A,

SEL B, SD and LB

Pull-Up Current

.5

µA

Pull-Down Current

3.0

µA

Driver Short Circuit Current

V

35

250

mA

-7V ≤ V

Driver Short Circuit Current

V

35

250

mA

-7V ≤ V

AC Characteristics

Driver Data Rate

0

Mbps

Driver Data Rate

8

Mbps

T

Driver Input to Output t

PLH

70

80

ns

R

Figures 3 and 5

Driver Input to Output t

PHL

70

80

ns

R

Figures 3 and 5

ABSOLUTE MAXIMUM RATINGS

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

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

Receivers......................+/-30V @ ≤100mA

Driver Outputs..................................................+/-15V

Maximum Data Rate..........................8Mbps (Note 1)

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

Power Dissipation

28-pin WSOIC...................................000mW

Package Derating:

28-pin WSOIC

ø

Limits are specified at T