Rev. 6/30/03

SP3223B/3243B +3.0V to +5.5V RS-232 Transceivers

© Copyright 2003 Sipex Corporation

4

Figure 1. Transmitter Output Voltage VS. Load

Capacitance for the SP3223B

Figure 2. Slew Rate VS. Load Capacitance for the

SP3223B

TYPICAL PERFORMANCE CHARACTERISTICS

Unless otherwise noted, the following performance characteristics apply for V

loaded with 3K

Ω, 0.1µF charge pump capacitors, and T

30

25

20

15

10

5

0

0

500

1000

2000

3000

4000

5000

Load Capacitance (pF)

- Slew

+ Slew

1 Transmitter at 250Kbps

1 Transmitter at 15.6Kbps

All drivers loaded 3K + Load Cap

35

30

25

20

15

10

5

0

Load Capacitance (pF)

0

1000

2000

3000

4000

5000

250Kbps

125Kbps

20Kbps

1 Transmitter at 250Kbps

1 Transmitter at 15.6Kbps

All drivers loaded 3K + Load Cap

Figure 3. Supply Current VS. Load Capacitance when

Transmitting Data for the SP3223B

Figure 4. Supply Current VS. Supply Voltage for

the SP3243B

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

Figure 5. Transmitter Output Voltage VS. Supply

Voltage for the SP3243B

Figure 6. Transmitter Output Voltage VS. Load

Capacitance for the SP3243B

6

4

2

0

-2

-4

-6

0

1000

2000

3000

4000

5000

TxOUT +

TxOUT -

Load Capacitance (pF)

6

4

2

0

-2

-4

-6

0

1000

2000

3000

4000

5000

TxOUT +

TxOUT -

Load Capacitance (pF)

6

4

2

0

-2

-4

-6

2.7

3

3.5

4

4.5

5

TxOUT -

TxOUT +