MAX232 Dual EIA-232 Driver/Receiver with Charge Pump
Dual RS232 driver/receiver, 5V supply, 120kb/s, 0C-70C
Aliase:MAX232N, RS-232 Transceiver
DIP-16 Top View
16 Pins
Pinout Table16
| Pin | Signal / Name | Type | Alternative Functions |
|---|---|---|---|
| 1 | C1+ | Analog | Charge-Pump Capacitor 1 Positive — connect 1µF capacitor between pins 1 and 3 (C1+ and C1-) |
| 2 | VS+ | Power | Internally Generated +10V Supply — output of doubling charge pump; connect 1µF cap to GND; do not connect to external circuit |
| 3 | C1- | Analog | Charge-Pump Capacitor 1 Negative — connect 1µF capacitor between pins 1 and 3 (C1+ and C1-) |
| 4 | C2+ | Analog | Charge-Pump Capacitor 2 Positive — connect 1µF capacitor between pins 4 and 5 (C2+ and C2-) |
| 5 | C2- | Analog | Charge-Pump Capacitor 2 Negative — connect 1µF capacitor between pins 4 and 5 (C2+ and C2-) |
| 6 | VS- | Power | Internally Generated -10V Supply — output of inverting charge pump; connect 1µF cap to GND; do not connect to external circuit |
| 7 | T2OUT | Analog | RS-232 Driver Channel 2 Output — swings ±5V to ±9V; connect to RS-232 RX line of remote device |
| 8 | R2IN | Digital | RS-232 Receiver Channel 2 Input — accepts RS-232 levels (±3V to ±15V); connect to RS-232 TX line of remote device |
| 9 | R2OUT | Digital | TTL/CMOS Receiver Channel 2 Output — converted 5V logic output from RS-232 R2IN; connect to MCU RX pin |
| 10 | T2IN | Digital | TTL/CMOS Driver Channel 2 Input — accepts 5V logic from MCU TX pin; drives T2OUT at RS-232 levels |
| 11 | T1IN | Digital | TTL/CMOS Driver Channel 1 Input — accepts 5V logic from MCU TX pin; drives T1OUT at RS-232 levels |
| 12 | R1OUT | Digital | TTL/CMOS Receiver Channel 1 Output — converted 5V logic output from RS-232 R1IN; connect to MCU RX pin |
| 13 | R1IN | Digital | RS-232 Receiver Channel 1 Input — accepts RS-232 levels (±3V to ±15V); connect to RS-232 TX line of remote device |
| 14 | T1OUT | Analog | RS-232 Driver Channel 1 Output — swings ±5V to ±9V; connect to RS-232 RX line of remote device |
| 15 | GND | Ground | System Ground (0V) |
| 16 | VCC | Power | Positive Power Supply (+5V; add 100nF + 10µF bypass caps to GND near pin) |