SP3243B datasheet(5/24 Pages) SIPEX

5 / 24 page

Rev. 6/30/03

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

TYPICAL PERFORMANCE CHARACTERISTICS

Unless otherwise noted, the following performance characteristics apply for V

CC = +3.3V, 250kbps data rate, all drivers

loaded with 3K

Ω, 0.1µF charge pump capacitors, and T

AMB = +25°C.

Figure 7. Slew Rate VS. Load Capacitance for the

SP3243B

500

1000

2000

3000

4000

5000

Load Capacitance (pF)

- Slew

+ Slew

1 Transmitter at 250Kbps

2 Transmitter at 15.6Kbps

All drivers loaded 3K + Load Cap

Figure 8. Supply Current VS. Load Capacitance when

Transmitting Data for the SP3243B

Load Capacitance (pF)

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

-2

-4

-6

2.7

3.5

4.5

Supply Voltage (VDC)

TxOUT -

TxOUT +

Figure 9. Supply Current VS. Supply Voltage for the

SP3243B

Figure 10. Transmitter Output Voltage VS. Supply

Voltage for the SP3243B

2.7

3.5

4.5

Supply Voltage (VDC)

1 Transmitter at 250Kbps

2 Transmitters at 15.6Kbps

All drivers loaded with 3K // 1000pF

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