4

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

SP3243E_100_072309

Unless otherwise noted, the following performance characteristics apply for V

drivers loaded with 3kΩ, 0.1µF charge pump capacitors, and T

Figure 2. Transmitter Output Voltage VS. Supply

Voltage for the SP3243EU

Figure 6. Transmitter Output Voltage VS. Load

Capacitance for the SP3243EB

Figure 1. Transmitter Skew VS. Load Capacitance

0

250

500

1000

1500

2000

200

150

100

50

0

Load Capacitance (pF)

T1 at 500Kbps

T2 at 31.2Kbps

All TX loaded 3K // CLoad

Figure 3. Transmitter Output Voltage VS. Load

Capacitance for the SP3243EU

Figure 5. Supply Current VS. Supply Voltage for the

SP3243EU

Figure 4. Supply Current VS. Load Capacitance for

the SP3243EU

TYPICAL PERFORMANCE CHARACTERISTICS

2.7

3

3.5

4

4.5

5

Supply V oltage (V)

6

4

2

0

-2

-4

-6

1Driver at 1Mbps

Other Drivers at 62.5Kbps

All Drivers Loaded with 3K // 250pF

25

20

15

10

5

0

2.7

3

3.5

4

4.5

5

1 Transmitter at 250Kbps

2 Transmitters at 15.6Kbps

All drivers loaded with 3K // 1000pF

0

250

500

1000

1500

2000

Load Capacitance (pF)

6

4

2

0

-2

-4

-6

1 TX at full data rate

2 TX’s at1/16 data rate

2Mbps

1.5Mbps

1Mbps

2Mbps

1.5Mbps

1Mbps

40

35

30

25

20

15

10

5

0

Load Capacitance (pF)

0

1000

2000

3000

4000

5000

250Kbps

120Kbps

20Kbps

1 Transmitter at full Data Rate

2 Transmitters at 15.5 Kbps

All Transmitters loades 3K + Load Cap

6

4

2

0

-2

-4

-6

0

1000

2000

3000

4000

5000

TxOUT +

TxOUT -

Load Capacitance (pF)