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Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com

SP1490_SP1491E_100_061209

SP1490E/1491E rEcEivEr

dc characteristics

Differential Input Threshold

0.2

+0.2

Volts

-7V ≤ V

Input Hysteresis

70

mV

V

Output Voltage High

3.5

Volts

I

Output Voltage Low

0.4

Volts

I

Input Resistance

12

15

kΩ

-7V ≤ V

Input Current (A, B); V

±1.0

mA

V

Input Current (A, B); V

-0.8

mA

V

Short-Circuit Current

85

mA

0V ≤ V

ParaMEtErS

Min.

tYP.

MaX. unitS

conditionS

SP1490E/1491E rEcEivEr

ac characteristics

Maximum Data Rate

20

Mbps

Receiver Input to Output

20

45

50

ns

t

C

15pF

RO

A

B

A

B

DI

DE

3V

500

Output

Under

Test

Figure 3. Driver/Receiver Timing Test Circuit

Figure 4. Driver Timing Test Load #2 Circuit

A

B

R

R

1K

1K

Receiver

Output

Test Point

Figure 1. Driver DC Test Load Circuit

Figure 2. Receiver Timing Test Load Circuit

Receiver Input to Output

20

45

50

ns

t

C

=

Diff. Receiver Skew It

5

10

ns

R

Receiver Tplh/Tphl

40

70

ns

PoWEr rEQuirEMEntS

Supply Voltage

+4.75

+5.25 Volts

Supply Current

900

μA

EnvironMEntaL and

MEchanicaL

Operating Temperature

Commercial (_C_)

0

+70

°C

Industrial (_E_)

-40

+85

°C

Storage Temperature

-65

+150 °C

SPEcificationS (continued)

T