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Specifications
SKU: 12607378
| Parameter | Symbol | Min | Typical | Max | Unit | Notes |
|---|---|---|---|---|---|---|
| Supply Voltage | VCC | 4.75 | 5.0 | 5.25 | V | Operating range for standard operation |
| Operating Temperature | Topr | -40 | 85 | °C | Industrial temperature range | |
| Output Current (Tx) | Iout | 10 | mA | Maximum output current per driver | ||
| Input Current (Rx) | Iin | 1 | mA | Maximum input current per receiver | ||
| Data Rate | fdata | 20 | kbps | Maximum data rate for reliable operation | ||
| Capacitors | C1, C2 | 1 | 10 | 100 | μF | Recommended values for charge pump capacitors |
| C3, C4 | 0.1 | 1 | 10 | μF | Recommended values for bypass capacitors | |
| Driver Output Voltage | Vout(Tx) | -7 | -10 | -12 | V | Output voltage swing for RS-232 compliance |
| Receiver Input Voltage | Vin(Rx) | -12 | 12 | V | Input voltage range for RS-232 compliance | |
| Power Consumption | Ptot | 20 | mW | Total power consumption at 5V supply |
Instructions for Using the MAX232N:
Power Supply:
- Connect the VCC pin to a 5V supply.
- Connect the GND pin to ground.
Capacitors:
- Connect 10μF capacitors (C1 and C2) between the V+ and V- pins to the respective charge pump capacitors.
- Connect 1μF capacitors (C3 and C4) between VCC and GND for bypassing.
RS-232 Interface:
- Connect the T1OUT and T2OUT pins to the RS-232 transmit lines.
- Connect the R1IN and R2IN pins to the RS-232 receive lines.
- Connect the R1OUT and R2OUT pins to the TTL/CMOS receive lines.
- Connect the T1IN and T2IN pins to the TTL/CMOS transmit lines.
Data Transmission:
- Ensure that the data rate does not exceed 20 kbps for reliable operation.
- The drivers (T1IN, T2IN) should provide a logic level signal (0V for low, VCC for high).
- The receivers (R1OUT, R2OUT) will provide a logic level signal based on the RS-232 input.
Temperature Considerations:
- Operate the device within the -40°C to 85°C temperature range to ensure reliable performance.
Layout Considerations:
- Place the capacitors as close as possible to the IC to minimize parasitic inductance and improve performance.
- Use a ground plane to reduce noise and improve signal integrity.
ESD Protection:
- Handle the IC with care to avoid electrostatic discharge (ESD) damage.
- Use proper ESD protection devices and practices when handling and soldering the IC.
Inquiry - MAX232N.
