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

SP3243E_100_072309

3

Unless otherwise noted, the following specifications apply for V

C1 - C4 = 0.1µF. Typical values apply at V

ELECTRICAL CHARACTERISTICS

PARAMETER

MIN.

TYP. MAX. UNITS CONDITIONS

DRIVER OUTPUTS (continued)

Output Resistance

300

Ω

V

Output Short-Circuit Current

+35

+60

mA

V

Output Leakage Current

+25

µA

V

+12V, Drivers disabled

RECEIVER INPUTS

Input Voltage Range

-15

15

V

Input Threshold LOW

0.6

1.2

V

Vcc = 3.3V

Input Threshold LOW

0.8

1.5

V

Vcc = 5.0V

Input Threshold HIGH

1.5

2.4

V

Vcc = 3.3V

Input Threshold HIGH

1.8

2.4

V

Vcc = 5.0V

Input Hysteresis

0.3

V

Input Resistance

3

5

7

kΩ

AUTO ON-LINE® CIRCUITRY CHARACTERISTICS (ONLINE = GND, SHUTDOWN = VCC) 25°C

STATUS Output Voltage LOW

0.4

V

I

STATUS Output Voltage HIGH

V

V

I

Receiver Threshold to Drivers

Enabled (t

350

µs

Figure 14

Receiver Positive or Negative

Threshold to STATUS HIGH (t

0.2

µs

Figure 14

Receiver Positive or Negative

Threshold to STATUS LOW (t

30

µs

Figure 14

TIMING CHARACTERISTICS

Maximum Data Rate (U)

(H)

(B)

( - )

1000

460

250

120

Kbps

R

active

R

driver active

R

driver active

R

driver active

Receiver Propagation Delay

t

PHL

t

PLH

0.15

0.15

µs

Receiver input to Receiver out-

put, C

Receiver Output Enable Time

200

ns

Normal operation

Receiver Output Disable Time

200

ns

Normal operation

Driver Skew (E, EB)

(EU)

100

50

500

100

ns

| t

Receiver Skew

50

ns

| t

Transition-Region Slew Rate (U)

(EB)

6

90

30

V/µs

Vcc = 3.3V, R

25°C, measurements taken from

-3.0V to +3.0V or +3.0V to -3.0V