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

SP3238E_100_020111

3

ELECTRICAL CHARACTERISTICS

PARAMETER

MIN.

TYP. MAX. UNITS CONDITIONS

DRIVER OUTPUTS (continued)

Output Resistance

300

Ω

V

Output Short-Circuit Current

+35

+60

mA

V

RECEIVER INPUTS

Input Voltage Range

-25

25

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

0.5

V

Input Resistance

3

5

7

kΩ

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

STATUS Output Voltage LOW

0.4

V

I

STATUS Output Voltage HIGH

V

V

I

Receiver Threshold to Drivers

Enabled (t

200

µs

Figure 10

Receiver Positive or Negative

Threshold to STATUS HIGH (t

0.5

µs

Figure 10

Receiver Positive or Negative

Threshold to STATUS LOW (t

20

µs

Figure 10

TIMING CHARACTERISTICS

Maximum Data Rate

250

kbps

R

driver switching

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

100

ns

| t

Receiver Skew

50

ns

| t

Transition-Region Slew Rate

30

V/µs

Vcc = 3.3V, R

25°C, measurements taken from

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

V

C1 = 0.047µF and C2 - C4 = 0.33µF (tested at 5.0V +/-10%), T

values are at T

o

C