SP3232EBET-L Datasheet, PDF (4/22 Pages) Exar Corporation – True 3.0V to 5.5V RS-232 Transceivers

TYPICAL PERFORMANCE CHARACTERISTICS
Unless otherwise noted, the following performance characteristics apply for V_CC = +3.3V, 1000kbps data rate, all
drivers loaded with 3kΩ, 0.1µF charge pump capacitors, and T_AMB = +25°C.
6
4
2
0
-2
-4
-6
0
TxOUT+
TxOUT -
T1 at 250Kbps
T2 at 15.6Kbps
All TX loaded 3K // CLoad
1000 2000 3000 4000
Load Capacitance (pF)
5000
Figure 1. Transmitter Output Voltage vs Load
Capacitance
30
25
20
15
10
5
0
0
- Slew
+ Slew
T1 at 250Kbps
T2 at 15.6Kbps
All TX loaded 3K // CLoad
500 1000 2000 3000 4000 5000
Load Capacitance (pF)
Figure 2. Slew Rate vs Load Capacitance
35
T1 at Full Data Rate
30 _{T2 at 1/16 Data Rate}
25 ^{All TX loaded 3K // CLoad}
250Kbps
20
125Kbps
15
20Kbps
10
5
0
0
1000 2000 3000 4000
Load Capacitance (pF)
5000
Figure 3. Supply Current VS. Load Capacitance
when Transmitting Data
16
14
12
10
8
6
1 Transmitter at 250Kbps
4
1 Transmitter at 15.6Kbps
All transmitters loaded with 3K // 1000pf
2
0
2.7
3
3.5
4
4.5
5
Supply Voltage (V)
Figure 4. Supply Current VS. Supply Voltage
6
4
2
0
-2
-4
-6
2.7
TxOUT +
T1 at 250Kbps
T2 at 15.6Kbps
All TX loaded 3K // 1000 pF
TxOUT -
3
3.5
4
4.5
5
Supply Voltage (V)
Figure 5. Transmitter Output Voltage vs Supply
Voltage
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
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SP3222EB/SP3232EB_103_081414