Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)6687000 • Fax (50)668-707 • www.exar.com

SP4082E_00_22007

4

ELECTRICAL CHARACTERISTICS

PARAMETER

TEST CONDITIONS

MIN

TYP

MAx

UNIT

Digital Input Signals: DI, DE, RE

Logic input thresholds

2.0

V

0.8

Logic Input Current

±

μA

Input Hysteresis

00

mV

Driver

No Load

V

Differential Driver Output, Test 

2

V

.5

2.7

Differential Driver Output, Test 2

.5

Change in Magnitude of Differential Output

±0.2

V

Driver Common Mode Output Voltage (Voc)



3

V

Change in Common Mode Output Voltage

±0.2

V

Driver Short Circuit Current Limit

±250

mA

Output Leakage Current

DE=0,

25

μA

RE=0,

5.5V

-00

Receiver

Receiver Input Resistance

96

KΩ

Input Current (A, B pins)

DE=0,

RE=0,

Vcc=0 or

5.5V

25

-00

μA

Receiver Differential Threshold (VA-VB)

-200

-25

-40

mV

Receiver Input Hysteresis

25

mV

Receiver

Output

Voltage

Vcc-.5

V

0.4

High-Z Receiver Output Current

± 

μA

Receiver Output Short Circuit Current

± 95

mA

Supply and Protection

Supply

Current

IQ, Active Mode

400

900

μA

Shutdown Mode, Note 2



μA

Thermal Shutdown Temperature

Junction temperature

65

o

C

Thermal Shutdown Hysteresis

5

Notes:

. Change in Magnitude of Differential Output Voltage and Change in Magnitude of Common Mode Output Voltage are the changes in output voltage when DI input changes state.

2. The transceivers are put into shutdown by bringing RE high and DE low. If the inputs are in this state for less than 50ns the device does not enter shutdown. If the enable inputs

are held in this state for at least 600ns the device is assured to be in shutdown. In this low power mode most circuitry is disabled and supply current is typically nA.

3.Characterized, not 00% tested.