Texas Instruments
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RS-232 level converter with an onboard charge pump — generates ±10V from a single 5V rail using four external capacitors.
| Part number | MAX232 |
|---|---|
| Manufacturer | Texas Instruments |
| Category | Integrated Circuits › Transceiver ICs (RS-485, CAN) |
| Package | DIP-16 |
| Pins | 16 |
| Voltage (max) | 10 V |
MAX232 pinout
| Pin | Name | Type | Description |
|---|---|---|---|
| 1 | C1+ | passive | Charge pump capacitor 1 positive |
| 2 | V+ | power out | Generated +10V |
| 3 | C1- | passive | Charge pump capacitor 1 negative |
| 4 | C2+ | passive | Charge pump capacitor 2 positive |
| 5 | C2- | passive | Charge pump capacitor 2 negative |
| 6 | V- | power out | Generated -10V |
| 7 | T2OUT | output | RS-232 transmit 2 |
| 8 | R2IN | input | RS-232 receive 2 |
| 9 | R2OUT | output | TTL receive 2 |
| 10 | T2IN | input | TTL transmit 2 |
| 11 | T1IN | input | TTL transmit 1 |
| 12 | R1OUT | output | TTL receive 1 |
| 13 | R1IN | input | RS-232 receive 1 |
| 14 | T1OUT | output | RS-232 transmit 1 |
| 15 | GND | ground | Ground |
| 16 | VCC | power | Supply, 5V |
Schematic symbol and footprint
Schematic symbol
Footprint: DIP-16 — to scale, pad 1 in yellow (mm). Check against the datasheet before ordering PCBs.