9.2.1 Design Requirements

• Recommended VCC is 3.3 V or 5 V. 3 V to 5.5 V is also possible

• Maximum recommended bit rate is 250 kbit/s.

Table 9-1. VCC vs Capacitor Values

VCC

C1

C2, C3, C4

3.3 V ± 0.3 V

0.1 µF

0.1 µF

5 V ± 0.5 V

0.047 µF

0.33 µF

3 V to 5.5 V

0.1 µF

0.47 µF

9.2.2 Detailed Design Procedure

• All DIN, FORCEOFF and FORCEON inputs must be connected to valid low or high logic levels.

• Select capacitor values based on VCC level for best performance.

9.2.3 Application Curves

±9

±8

±7

±6

±5

±4

±3

±2

±1

0

1

2

3

4

5

6

0

1

2

3

4

5

6

7

8

9

10

Time ( s)

DIN

DOUT to RIN

ROUT

C001

VCC = 3.3 V

Figure 9-2. 250 kbit/s Driver to Receiver Loopback Timing Waveform

10 Power Supply Recommendations

VCC should be between 3 V and 5.5 V. Charge pump capacitors should be chosen using table in Typical

Operating Circuit and Capacitor Values.

MAX3232

SLLS410O – JANUARY 2000 – REVISED JUNE 2021

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