6

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

SP490,49_00_07408

T

PARAMETERS

MIN.

TYP.

SP491RECEIVER

DCCharacteristics

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

Three State (high impedance)

Output Current

±1

µA

0.4V ≤ V

Input Resistance

12

15

kΩ

-7V ≤ V

Input Current (A, B); V

±.0

mA

DE = 0V, V

Input Current (A, B); V

-0.8

mA

DE = 0V, V

Short-Circuit Current

7

85

mA

0V ≤ V

SP491RECEIVER

ACCharacteristics

Maximum Data Rate

5

Mbps

REB = 0V

Receiver Input to Output

60

90

50

ns

t

C

Receiver Input to Output

60

90

50

ns

t

C

=

Diff. Receiver Skew It

3

ns

R

Figures 3 & 8

Receiver Enable to Output Low

20

50

ns

C

Receiver Enable to Output High

20

50

ns

C

Receiver Disable from Low

20

50

ns

C

Receiver Disable from High

20

50

ns

C

POWERREQUIREMENTS

Supply Voltage

+4.75

+5.25 Volts

Supply Current

600

µA

REB, D = 0V or V

SP491ENVIRONMENTAL

ANDMECHANICAL

Operating Temperature

Commercial (C_)

0

+70

°C

Industrial (E_)

-40

+85

°C

Storage Temperature

-65

+50 °C

Package

Plastic DIP (_S)

NSOIC (_N)

Figure 9. Receiver Enable and Disable Times

ELECTRICALCHARACTERISTICS